[Iaude] MPEC Q22: COMET C/2018 O1 (ATLAS)

mpec at mpcdb1.cfa.harvard.edu mpec at mpcdb1.cfa.harvard.edu
Thu Aug 16 22:05:33 EDT 2018


M.P.E.C. 2018-Q22                                Issued 2018 Aug. 17, 01:56 UT
 
     The Minor Planet Electronic Circulars contain information on unusual
         minor planets and routine data on comets.  They are published
    on behalf of Division F of the International Astronomical Union by the
          Minor Planet Center, Smithsonian Astrophysical Observatory,
                          Cambridge, MA 02138, U.S.A.

             Prepared using the Tamkin Foundation Computer Network

                              MPC at CFA.HARVARD.EDU
            URL https://www.minorplanetcenter.net/    ISSN 1523-6714


                            COMET C/2018 O1 (ATLAS)
 
     The first unequivocal confirmation that this object is a comet was
reported R. Weryk (F51), who reported an enlarged FWHM (2" compared to stellar
1".35) and a ~6" tail towards the east in images obtained on Aug. 13.  Earlier
reports of enlarged FWHM were muddied by the non-reports of cometary features
from observers using much larger instruments: P. Birtwhistle (J95) reported
FWHM 24%-30% larger than stellar profiles on both July 31 and Aug. 9;
E. Prosperi (160, Aug. 9.86 UTC) reported a diffuse coma, FWHM 4".3, compared
to stellar 2".3; K. Sarnecsky (K88, Aug. 3.9 UTC) reported a slightly diffuse
circular ~10"-diameter coma, but no tail; D. Bamberger (Z80) reported a fuzzy
circular 13"-diameter coma and possible 16" tail in P.A. 138 on July 23.98 UTC,
and a fuzzy circular 14"-diameter coma on Aug. 3.01 UTC; and L. Buzzi (204,
Aug. 24 UTC) reported a compact 10"-diameter coma, possibly extended to the SW.

Observations:
    CK18O010  C2018 07 15.45741 21 58 45.96 +27 41 11.6          19.8  UEQ022I41
    CK18O010  C2018 07 15.45787 21 58 45.74 +27 41 11.3          19.6  UEQ022I41
    CK18O010  C2018 07 20.34830 21 18 53.46 +26 28 42.5          19.2  UEQ022I41
    CK18O010 IC2018 07 20.34920 21 18 52.95 +26 28 41.4          18.7  UEQ022I41
    CK18O010* C2018 07 22.54515 20 58 02.04 +25 28 22.1          18.7 oUEQ022T08
    CK18O010  C2018 07 22.55244 20 57 57.72 +25 28 06.0          18.7 oUEQ022T08
    CK18O010  C2018 07 22.56451 20 57 50.53 +25 27 43.4          18.5 oUEQ022T08
    CK18O010  C2018 07 22.57295 20 57 45.46 +25 27 27.4          18.6 oUEQ022T08
    CK18O010 KC2018 07 22.91677 20 54 21.43 +25 15 59.9          18.3 RtEQ022B49
    CK18O010 KC2018 07 22.91760 20 54 20.90 +25 15 58.4          18.5 RtEQ022B49
    CK18O010 KC2018 07 22.91953 20 54 19.74 +25 15 55.0          18.1 RtEQ022B49
    CK18O010 KC2018 07 22.92320 20 54 17.54 +25 15 46.3          18.9 GVEQ022J77
    CK18O010 KC2018 07 22.93711 20 54 09.14 +25 15 18.5          18.9 GVEQ022J77
    CK18O010 KC2018 07 22.95125 20 54 00.62 +25 14 49.4          19.1 GVEQ022J77
    CK18O010 KC2018 07 22.95826 20 53 56.40 +25 14 35.3          18.9 GVEQ022J77
    CK18O010 KC2018 07 22.98613 20 53 39.60 +25 13 37.9                VEQ022J95
    CK18O010 KC2018 07 22.99560 20 53 33.85 +25 13 18.8                VEQ022J95
    CK18O010 KC2018 07 23.00238 20 53 29.79 +25 13 04.6                VEQ022J95
    CK18O010 KC2018 07 23.00783 20 53 26.46 +25 12 53.6                VEQ022J95
    CK18O010 KC2018 07 23.01373 20 53 22.90 +25 12 41.3          19.0 GVEQ022J95
    CK18O010 KC2018 07 23.24136220 51 05.66 +25 04 48.2          18.9 VuEQ022H21
    CK18O010 KC2018 07 23.24346220 51 04.37 +25 04 44.1          19.0 VuEQ022H21
    CK18O010 KC2018 07 23.24608620 51 02.78 +25 04 38.6          19.0 VuEQ022H21
    CK18O010 KC2018 07 23.24905520 51 00.97 +25 04 32.1          19.1 VuEQ022H21
    CK18O010 IC2018 07 23.37477 20 49 44.43 +25 00 03.8          19.2  UEQ022I41
    CK18O010  C2018 07 23.37522 20 49 44.14 +25 00 03.3          19.4  UEQ022I41
    CK18O010 |C2018 07 23.40262 20 49 27.32 +24 59 04.1                vEQ022H06
    CK18O010 |C2018 07 23.40429 20 49 26.34 +24 59 00.3                vEQ022H06
    CK18O010 |C2018 07 23.40596 20 49 25.31 +24 58 56.8          18.8  vEQ022H06
    CK18O010 KC2018 07 23.84294 20 44 58.66 +24 42 39.6          18.3 GVEQ022595
    CK18O010 KC2018 07 23.84299320 44 58.60 +24 42 38.8          19.2 GVEQ022L01
    CK18O010 KC2018 07 23.84442420 44 57.66 +24 42 36.9          18.9 GVEQ022L01
    CK18O010 KC2018 07 23.84447 20 44 57.68 +24 42 36.7          18.2 GVEQ022595
    CK18O010 pC2018 07 23.84585220 44 56.82 +24 42 33.6          19.1 GVEQ022L01
    CK18O010 KC2018 07 23.84600 20 44 56.68 +24 42 33.7          17.7 GVEQ022595
    CK18O010 KC2018 07 23.85017820 44 54.12 +24 42 24.1          19.1 GVEQ022L01
    CK18O010 KC2018 07 23.85162120 44 53.20 +24 42 19.9          19.5 GVEQ022L01
    CK18O010 KC2018 07 23.86495 20 44 45.12 +24 41 49.5          18.9 RtEQ022B37
    CK18O010 KC2018 07 23.86659 20 44 44.06 +24 41 46.2          18.8 RtEQ022B49
    CK18O010 KC2018 07 23.86782 20 44 43.28 +24 41 43.3          18.6 RtEQ022B49
    CK18O010 KC2018 07 23.87339 20 44 39.59 +24 41 30.8                UEQ022118
    CK18O010 KC2018 07 23.88393 20 44 33.37 +24 41 06.5          19.0 RtEQ022B37
    CK18O010 KC2018 07 23.88445 20 44 32.98 +24 41 05.2          18.7 VqEQ022C77
    CK18O010 KC2018 07 23.89086 20 44 29.03 +24 40 51.7          18.2 RtEQ022B37
    CK18O010 KC2018 07 23.89111 20 44 28.81 +24 40 50.6          19.1  VEQ022104
    CK18O010 KC2018 07 23.89134 20 44 28.63 +24 40 50.5          18.2 RqEQ022C10
    CK18O010 KC2018 07 23.89221 20 44 28.22 +24 40 47.0          19.8 VqEQ022C77
    CK18O010 KC2018 07 23.89373 20 44 27.16 +24 40 44.2          18.5 RVEQ022K38
    CK18O010 KC2018 07 23.89426 20 44 26.89 +24 40 43.2          19.0  VEQ022104
    CK18O010 KC2018 07 23.89475 20 44 26.45 +24 40 41.5                UEQ022118
    CK18O010 KC2018 07 23.89899 20 44 23.88 +24 40 33.0          18.3 RqEQ022C10
    CK18O010 KC2018 07 23.90137 20 44 22.56 +24 40 27.4          18.6 RtEQ022B37
    CK18O010 KC2018 07 23.90372 20 44 20.97 +24 40 21.6          19.0  VEQ022104
    CK18O010 KC2018 07 23.90663 20 44 19.23 +24 40 15.2          18.4 RqEQ022C10
    CK18O010 KC2018 07 23.91251 20 44 15.65 +24 40 01.0          18.1 RVEQ022K38
    CK18O010 KC2018 07 23.92202 20 44 10.00 +24 39 38.2          18.4 RqEQ022C10
    CK18O010 KC2018 07 23.92360 20 44 08.72 +24 39 36.2          18.7 RqEQ022160
    CK18O010 KC2018 07 23.92526 20 44 07.70 +24 39 32.3          18.4 RqEQ022160
    CK18O010 KC2018 07 23.92579 20 44 07.39 +24 39 29.0                VEQ022J95
    CK18O010 KC2018 07 23.92690 20 44 06.64 +24 39 28.5          18.9 RqEQ022160
    CK18O010 KC2018 07 23.92741 20 44 06.31 +24 39 25.6          18.6 GUEQ022K87
    CK18O010 KC2018 07 23.92773 20 44 06.28 +24 39 24.7          18.1 RqEQ022C10
    CK18O010 KC2018 07 23.93004 20 44 04.68 +24 39 19.5          19.3 GUEQ022K87
    CK18O010 KC2018 07 23.93130 20 44 03.90 +24 39 16.8          18.2 RVEQ022K38
    CK18O010 KC2018 07 23.93146 20 44 03.75 +24 39 16.1          18.6 GUEQ022K87
    CK18O010 KC2018 07 23.93247 20 44 03.16 +24 39 13.9          18.7 GUEQ022K87
    CK18O010 KC2018 07 23.93344 20 44 02.65 +24 39 12.0          18.2 RqEQ022C10
    CK18O010 KC2018 07 23.93400 20 44 02.30 +24 39 10.1                VEQ022J95
    CK18O010 KC2018 07 23.94528 20 43 55.28 +24 38 43.9                VEQ022J95
    CK18O010 KC2018 07 23.95998 20 43 46.10 +24 38 11.2                VEQ022204
    CK18O010 KC2018 07 23.97326 20 43 37.79 +24 37 40.2          19.5 GUEQ022K87
    CK18O010 KC2018 07 23.97946320 43 34.06 +24 37 24.0          18.8 GVEQ022Z80
    CK18O010 KC2018 07 23.98476 20 43 30.69 +24 37 13.7                VEQ022204
    CK18O010 KC2018 07 23.99011 20 43 27.31 +24 37 01.6          18.0 RVEQ022K38
    CK18O010 KC2018 07 23.99259 20 43 25.92 +24 36 54.4          18.9 GVEQ022J95
    CK18O010 KC2018 07 23.99335 20 43 25.33 +24 36 54.0                VEQ022204
    CK18O010 KC2018 07 23.99693420 43 23.18 +24 36 41.7          18.7 GVEQ022Z80
    CK18O010 KC2018 07 23.99797 20 43 22.43 +24 36 42.0          19.1 GUEQ022K87
    CK18O010 KC2018 07 24.00177 20 43 20.10 +24 36 34.3                VEQ022204
    CK18O010 KC2018 07 24.01044 20 43 14.71 +24 36 13.9          19.0 GVEQ022204
    CK18O010 KC2018 07 24.01309820 43 13.20 +24 36 05.8          18.6 GVEQ022Z80
    CK18O010 9C2018 07 24.14265 20 41 52.42 +24 31 05.8          19.3 VUEQ022G40
    CK18O010 9C2018 07 24.15113 20 41 47.10 +24 30 46.4          19.3 VUEQ022G40
    CK18O010 KC2018 07 24.47635 20 38 24.20 +24 17 36.4          19.4 RoEQ022291
    CK18O010 KC2018 07 24.47703 20 38 23.75 +24 17 34.4          18.8 RoEQ022291
    CK18O010 KC2018 07 24.47801 20 38 23.10 +24 17 32.3          19.2 RoEQ022291
    CK18O010 KC2018 07 24.87799 20 34 12.48 +24 00 40.2          18.4 RVEQ022K38
    CK18O010 KC2018 07 24.89077 20 34 04.32 +24 00 06.9          18.0 RVEQ022K38
    CK18O010 KC2018 07 24.90314 20 33 56.42 +23 59 34.0          19.3 GVEQ022C47
    CK18O010 KC2018 07 24.90802 20 33 53.29 +23 59 21.1          19.0 GVEQ022C47
    CK18O010 KC2018 07 24.91290 20 33 50.20 +23 59 08.5          18.9 GVEQ022C47
    CK18O010 KC2018 07 24.91779 20 33 47.09 +23 58 56.0          19.0 GVEQ022C47
    CK18O010 KC2018 07 24.92267 20 33 43.99 +23 58 43.3          19.1 GVEQ022C47
    CK18O010 KC2018 07 24.95662 20 33 22.52 +23 57 14.5                VEQ022J95
    CK18O010 KC2018 07 24.96930 20 33 14.47 +23 56 41.2                VEQ022J95
    CK18O010 KC2018 07 24.98220 20 33 06.26 +23 56 07.9          19.1 GVEQ022J95
    CK18O010 KC2018 07 25.02994 20 32 35.71 +23 54 02.6          18.7 GUEQ022K87
    CK18O010 KC2018 07 25.03186 20 32 34.48 +23 53 57.9          19.1 GUEQ022K87
    CK18O010 KC2018 07 25.03197 20 32 34.42 +23 53 57.3          18.8 GUEQ022K87
    CK18O010 KC2018 07 25.04410 20 32 26.68 +23 53 25.7          19.0 GUEQ022K87
    CK18O010 KC2018 07 25.05405 20 32 20.35 +23 52 59.4          18.5 GUEQ022K87
    CK18O010 KC2018 07 25.05594 20 32 19.14 +23 52 54.4          19.3 GUEQ022K87
    CK18O010 KC2018 07 25.05607 20 32 19.05 +23 52 54.0          19.0 GUEQ022K87
    CK18O010 KC2018 07 25.05810 20 32 17.77 +23 52 48.8          19.5 GUEQ022K87
    CK18O010 KC2018 07 25.06012 20 32 16.46 +23 52 43.5          19.4 GUEQ022K87
    CK18O010 ^C2018 07 25.21449 20 30 39.07 +23 45 55.8                oEQ022695
    CK18O010 ^C2018 07 25.21573 20 30 38.26 +23 45 52.6          18.9 RoEQ022695
    CK18O010 ^C2018 07 25.21698 20 30 37.47 +23 45 49.4          19.1 RoEQ022695
    CK18O010 KC2018 07 25.91601 20 23 09.13 +23 13 21.9          19.6 RtEQ022B37
    CK18O010 KC2018 07 25.92959 20 23 00.35 +23 12 42.7          19.6 RtEQ022B37
    CK18O010 KC2018 07 25.93041 20 22 59.74 +23 12 39.3          18.6 RtEQ022B37
    CK18O010 KC2018 07 25.93124 20 22 59.16 +23 12 36.0          18.0 VqEQ022104
    CK18O010 KC2018 07 25.94413 20 22 50.89 +23 12 01.2          19.5 RtEQ022B37
    CK18O010 KC2018 07 25.94644 20 22 49.42 +23 11 51.2                VEQ022J95
    CK18O010 KC2018 07 25.94804 20 22 48.29 +23 11 47.8          18.3 VqEQ022104
    CK18O010 KC2018 07 25.95539 20 22 43.46 +23 11 26.5          18.1 VqEQ022104
    CK18O010 KC2018 07 25.95843 20 22 41.66 +23 11 15.8                VEQ022J95
    CK18O010 KC2018 07 25.96946 20 22 34.47 +23 10 44.4          18.8 GVEQ022J95
    CK18O010 KC2018 07 25.98934 20 22 21.41 +23 09 47.7          19.9 GUEQ022K87
    CK18O010 KC2018 07 25.99015 20 22 20.88 +23 09 45.0          19.9 GUEQ022K87
    CK18O010 KC2018 07 25.99137 20 22 20.11 +23 09 41.2          19.5 GUEQ022K87
    CK18O010 KC2018 07 25.99239 20 22 19.45 +23 09 38.7          19.8 GUEQ022K87
    CK18O010 KC2018 07 25.99361 20 22 18.65 +23 09 35.2          19.5 GUEQ022K87
    CK18O010 KC2018 07 26.10722 20 21 05.72 +23 04 03.7          18.8 VqEQ022W25
    CK18O010 KC2018 07 26.12150 20 20 56.46 +23 03 22.0          18.2 VqEQ022W25
    CK18O010 KC2018 07 26.85072 20 13 01.66 +22 26 17.3          19.9 RtEQ022B37
    CK18O010 KC2018 07 26.85833 20 12 56.69 +22 25 52.0          19.5 RtEQ022B37
    CK18O010 KC2018 07 26.89437 20 12 32.91 +22 24 00.0          19.9 RtEQ022B37
    CK18O010 ^C2018 07 27.32944 20 07 46.91 +22 00 36.1          18.7 RoEQ022695
    CK18O010 ^C2018 07 27.33129 20 07 45.68 +22 00 30.1          18.5 RoEQ022695
    CK18O010 KC2018 07 29.85154 19 39 56.85 +19 27 55.9          19.2 RUEQ022B37
    CK18O010 KC2018 07 29.87523 19 39 41.08 +19 26 22.5          19.0 RUEQ022B37
    CK18O010 KC2018 07 29.88361 19 39 35.41 +19 25 47.9          18.4  qEQ022215
    CK18O010 KC2018 07 29.88874 19 39 31.97 +19 25 28.2          17.9  qEQ022215
    CK18O010 KC2018 07 29.89131 19 39 30.22 +19 25 18.7          18.0  qEQ022215
    CK18O010 KC2018 07 29.90669 19 39 20.07 +19 24 18.3          19.1 RUEQ022B37
    CK18O010 KC2018 07 29.90858 19 39 18.82 +19 24 10.4          18.0 RVEQ022K38
    CK18O010 KC2018 07 29.91689 19 39 13.24 +19 23 38.1          18.5 RVEQ022K38
    CK18O010 KC2018 07 29.92666 19 39 06.77 +19 22 58.9          19.0 RUEQ022B37
    CK18O010 KC2018 07 29.92930119 39 04.89 +19 22 47.8          18.9 VSEQ022L01
    CK18O010 KC2018 07 29.93329319 39 02.24 +19 22 31.6          19.0 VSEQ022L01
    CK18O010 KC2018 07 29.93528919 39 00.94 +19 22 24.0          19.0 VSEQ022L01
    CK18O010 KC2018 07 29.94565 19 38 54.10 +19 21 44.3          19.1 RUEQ022B37
    CK18O010 KC2018 07 29.95829 19 38 45.59 +19 20 53.1          18.5 RVEQ022K38
    CK18O010 KC2018 07 29.95877 19 38 45.40 +19 20 51.6          19.1 RUEQ022B37
    CK18O010 KC2018 07 30.86583 19 28 46.05 +18 19 15.2          18.4 VtEQ022L04
    CK18O010 KC2018 07 30.87245 19 28 41.64 +18 18 47.4          18.3 VtEQ022L04
    CK18O010 KC2018 07 30.88068 19 28 36.18 +18 18 13.1          18.5 VtEQ022L04
    CK18O010 KC2018 07 31.89510 19 17 32.28 +17 06 01.1                VEQ022J95
    CK18O010 KC2018 07 31.89870 19 17 29.77 +17 05 47.0          17.2 RVEQ022K38
    CK18O010 KC2018 07 31.92086 19 17 15.32 +17 04 09.5          17.5 RVEQ022K38
    CK18O010 KC2018 07 31.92088 19 17 15.44 +17 04 08.6                VEQ022J95
    CK18O010 KC2018 07 31.92541 19 17 12.36 +17 03 50.4          16.5 RVEQ022K63
    CK18O010 KC2018 07 31.92718 19 17 11.26 +17 03 40.5          16.2 RVEQ022K63
    CK18O010 KC2018 07 31.92914 19 17 09.90 +17 03 33.9          17.3 RVEQ022K63
    CK18O010 KC2018 07 31.94499 19 16 59.60 +17 02 24.1          17.2 RVEQ022K38
    CK18O010 KC2018 07 31.95085 19 16 55.86 +17 01 57.6          18.5 GVEQ022J95
    CK18O010 KC2018 07 31.95329 19 16 54.16 +17 01 47.6          17.7 RVEQ022K38
    CK18O010 KC2018 07 31.96712 19 16 45.09 +17 00 47.7          17.8 RVEQ022K38
    CK18O010 KC2018 07 31.99770 19 16 25.17 +16 58 33.6          17.6 RVEQ022K38
    CK18O010 KC2018 08 01.91570 19 06 33.97 +15 50 31.0          18.9 VSEQ022C43
    CK18O010 KC2018 08 01.91670 19 06 33.30 +15 50 26.1          18.9 VSEQ022C43
    CK18O010 KC2018 08 01.91770 19 06 32.64 +15 50 21.5          18.7 VSEQ022C43
    CK18O010 KC2018 08 01.91871 19 06 32.01 +15 50 17.7          18.6 VSEQ022C43
    CK18O010 KC2018 08 01.91981 19 06 31.29 +15 50 12.5          18.7 VSEQ022C43
    CK18O010  C2018 08 02.16060 19 03 58.19 +15 32 04.7          18.9 GUEQ022H36
    CK18O010  C2018 08 02.16249 19 03 56.98 +15 31 56.5          18.7 GUEQ022H36
    CK18O010  C2018 08 02.16628 19 03 54.48 +15 31 39.1          18.7 GUEQ022H36
    CK18O010 KC2018 08 02.98026 18 55 21.71 +14 29 23.3                VEQ022J95
    CK18O010 KC2018 08 02.99216 18 55 14.27 +14 28 29.0                VEQ022Z80
    CK18O010 KC2018 08 02.99634 18 55 11.62 +14 28 09.3                VEQ022J95
    CK18O010 KC2018 08 03.00042 18 55 09.06 +14 27 49.8          18.3 GVEQ022Z80
    CK18O010 KC2018 08 03.00530 18 55 06.01 +14 27 27.6          18.5 GVEQ022J95
    CK18O010 KC2018 08 03.00877 18 55 03.82 +14 27 11.7          18.9 GVEQ022Z80
    CK18O010 KC2018 08 03.01905 18 54 57.39 +14 26 23.7          18.7 GVEQ022Z80
    CK18O010 KC2018 08 03.02765 18 54 52.05 +14 25 44.0          18.5 GVEQ022Z80
    CK18O010  C2018 08 03.39730 18 51 02.60 +13 57 10.6          17.9 RoEQ022291
    CK18O010  C2018 08 03.39830 18 51 02.02 +13 57 05.5          17.8 RoEQ022291
    CK18O010  C2018 08 03.39931 18 51 01.37 +13 57 01.2          18.0 RoEQ022291
    CK18O010 KC2018 08 03.84294 18 46 30.24 +13 22 26.6          19.2 VqEQ022A71
    CK18O010 KC2018 08 03.84461 18 46 29.17 +13 22 19.1          18.1 VqEQ022A71
    CK18O010 KC2018 08 03.86563 18 46 16.40 +13 20 40.5          19.2 GUEQ022K87
    CK18O010 KC2018 08 03.86579 18 46 16.26 +13 20 40.3                qEQ022160
    CK18O010 KC2018 08 03.86645 18 46 15.86 +13 20 35.9          19.1 GUEQ022K87
    CK18O010 KC2018 08 03.86685 18 46 15.61 +13 20 34.0          19.3 GUEQ022K87
    CK18O010 KC2018 08 03.86686 18 46 15.61 +13 20 35.2          18.6 RqEQ022160
    CK18O010 KC2018 08 03.86793 18 46 14.95 +13 20 30.2          19.2 RqEQ022160
    CK18O010 KC2018 08 03.87007 18 46 13.66 +13 20 20.2                qEQ022160
    CK18O010 KC2018 08 03.87223 18 46 12.32 +13 20 10.6                qEQ022160
    CK18O010 KC2018 08 03.89008 18 46 01.30 +13 18 46.1          17.8 RoEQ022K88
    CK18O010 KC2018 08 03.89145 18 46 00.48 +13 18 39.7          18.0 RoEQ022K88
    CK18O010 KC2018 08 03.89306 18 45 59.48 +13 18 32.0          18.3 RoEQ022K88
    CK18O010 KC2018 08 03.89443 18 45 58.67 +13 18 25.6          18.3 RoEQ022K88
    CK18O010 KC2018 08 03.89581 18 45 57.81 +13 18 19.3          18.1 RoEQ022K88
    CK18O010 KC2018 08 03.90525 18 45 52.10 +13 17 34.2          19.0 GVEQ022C47
    CK18O010 KC2018 08 03.90869 18 45 49.97 +13 17 18.7          18.3 GVEQ022C47
    CK18O010 KC2018 08 03.91213 18 45 47.88 +13 17 02.2          18.7 GVEQ022C47
    CK18O010 KC2018 08 03.91625 18 45 45.35 +13 16 43.0          18.0 GVEQ022C47
    CK18O010 KC2018 08 03.97141318 45 11.68 +13 12 25.1          18.6 VSEQ022L01
    CK18O010 KC2018 08 03.97235718 45 11.10 +13 12 20.5          18.8 VSEQ022L01
    CK18O010 IC2018 08 03.97472218 45 09.69 +13 12 08.9          18.8 VSEQ022L01
    CK18O010 KC2018 08 03.97759 18 45 08.18 +13 11 59.2          18.4 RqEQ022J22
    CK18O010 KC2018 08 03.98046 18 45 06.47 +13 11 45.9                qEQ022J22
    CK18O010 KC2018 08 03.98334 18 45 04.73 +13 11 32.1          18.7 RqEQ022J22
    CK18O010 KC2018 08 04.16141 18 43 17.08 +12 57 35.1          18.2 RqEQ022850
    CK18O010 KC2018 08 04.18163 18 43 04.74 +12 56 00.1          18.0 RqEQ022850
    CK18O010 KC2018 08 04.21216 18 42 46.25 +12 53 36.6          17.8 RqEQ022850
    CK18O010  C2018 08 04.47972 18 40 06.26 +12 32 37.6          18.5 RrEQ022P93
    CK18O010  C2018 08 04.48617 18 40 02.33 +12 32 07.1          18.5 RrEQ022P93
    CK18O010  C2018 08 04.50735 18 39 49.59 +12 30 27.7          17.5 RrEQ022P93
    CK18O010 KC2018 08 04.84921 18 36 26.72 +12 03 34.1          18.7 GVEQ022587
    CK18O010 KC2018 08 04.84968 18 36 26.42 +12 03 31.8                VEQ022587
    CK18O010 KC2018 08 04.85835 18 36 21.25 +12 02 52.3          18.1 RqEQ022157
    CK18O010 KC2018 08 04.86929 18 36 14.70 +12 02 00.6          18.3 RqEQ022157
    CK18O010 KC2018 08 04.93893 18 35 33.42 +11 56 30.9          18.1 RoEQ022K88
    CK18O010 KC2018 08 04.94038 18 35 32.56 +11 56 23.7          18.1 RoEQ022K88
    CK18O010 KC2018 08 04.94182 18 35 31.79 +11 56 16.9          17.9 RoEQ022K88
    CK18O010 KC2018 08 04.94274 18 35 31.34 +11 56 13.6          18.5 RqEQ022B74
    CK18O010 KC2018 08 04.94324 18 35 30.85 +11 56 10.7          18.1 RoEQ022K88
    CK18O010 KC2018 08 04.94566 18 35 29.54 +11 55 59.2          18.6 RqEQ022B74
    CK18O010 KC2018 08 04.95969 18 35 21.32 +11 54 53.6          18.6 RqEQ022B74
    CK18O010 KC2018 08 05.10970 18 33 53.65 +11 43 08.2          18.5 RqEQ022850
    CK18O010 KC2018 08 05.12992 18 33 41.73 +11 41 32.3          18.0 RqEQ022850
    CK18O010 KC2018 08 05.15012 18 33 29.89 +11 39 57.0          17.9 RqEQ022850
    CK18O010 KC2018 08 05.16996 18 33 18.18 +11 38 23.7          17.9 RqEQ022850
    CK18O010  C2018 08 05.90571 18 26 14.91 +10 40 36.5          16.9 RqEQ022C23
    CK18O010  C2018 08 05.90721 18 26 13.98 +10 40 29.0          16.9 RqEQ022C23
    CK18O010  C2018 08 05.90870 18 26 13.15 +10 40 21.7          17.1 RqEQ022C23
    CK18O010  C2018 08 05.93632 18 25 56.73 +10 38 06.6          18.4 RQEQ022B96
    CK18O010  C2018 08 05.93966 18 25 54.99 +10 37 51.9          18.3 RQEQ022B96
    CK18O010  C2018 08 05.94300 18 25 53.02 +10 37 34.9          18.5 RQEQ022B96
    CK18O010  C2018 08 05.95015 18 25 48.95 +10 37 02.0          18.1 RQEQ022B96
    CK18O010  C2018 08 06.41426 18 21 27.64 +10 00 45.2          18.1 oUEQ022T08
    CK18O010  C2018 08 06.42474 18 21 21.76 +09 59 56.3          18.2 oUEQ022T08
    CK18O010  C2018 08 06.44606 18 21 09.79 +09 58 15.8          17.7 oUEQ022T08
    CK18O010 KC2018 08 07.17606 18 14 29.68 +09 01 22.9                oEQ022711
    CK18O010 KC2018 08 07.17857 18 14 28.29 +09 01 11.2                oEQ022711
    CK18O010 KC2018 08 07.18104 18 14 26.95 +09 00 59.8                oEQ022711
    CK18O010 KC2018 08 08.16346 18 05 46.90 +07 45 25.3                oEQ022711
    CK18O010 KC2018 08 08.16615 18 05 45.50 +07 45 13.1                oEQ022711
    CK18O010 KC2018 08 08.16893 18 05 44.05 +07 45 00.5                oEQ022711
    CK18O010  C2018 08 08.40864 18 03 40.13 +07 26 48.2          18.9 cUEQ022T05
    CK18O010  C2018 08 08.41935 18 03 34.62 +07 25 59.1          18.2 cUEQ022T05
    CK18O010  C2018 08 08.43004 18 03 29.10 +07 25 10.2          18.7 cUEQ022T05
    CK18O010  C2018 08 08.44075 18 03 23.60 +07 24 21.8          18.1 cUEQ022T05
    CK18O010 KC2018 08 08.51861 18 02 44.26 +07 18 25.8          17.7 RqEQ022Q11
    CK18O010 KC2018 08 08.52928 18 02 38.75 +07 17 37.5                qEQ022Q11
    CK18O010 KC2018 08 08.53428 18 02 36.20 +07 17 14.5                qEQ022Q11
    CK18O010  C2018 08 08.93874 17 59 11.93 +06 46 44.4          18.2 RQEQ022B96
    CK18O010  C2018 08 08.94303 17 59 09.64 +06 46 24.3          17.5 RQEQ022B96
    CK18O010  C2018 08 08.95106 17 59 05.76 +06 45 44.8          17.8 RQEQ022B96
    CK18O010  C2018 08 08.95855 17 59 01.82 +06 45 14.9          17.9 RQEQ022B96
    CK18O010 KC2018 08 09.16599 17 57 19.02 +06 29 48.1                oEQ022711
    CK18O010 KC2018 08 09.16912 17 57 17.46 +06 29 34.0                oEQ022711
    CK18O010 KC2018 08 09.17157 17 57 16.24 +06 29 23.1                oEQ022711
    CK18O010 KC2018 08 09.86965 17 51 36.49 +05 37 47.6          19.3 RqEQ022160
    CK18O010 KC2018 08 09.87243 17 51 35.13 +05 37 35.2          19.2 RqEQ022160
    CK18O010 KC2018 08 09.87381 17 51 34.48 +05 37 29.0          19.3 RqEQ022160
    CK18O010 KC2018 08 09.87521 17 51 33.80 +05 37 23.0          18.4 RqEQ022160
    CK18O010 KC2018 08 09.87797 17 51 32.46 +05 37 10.4          19.3 RqEQ022160
    CK18O010 KC2018 08 09.94444 17 51 00.69 +05 32 18.5                VEQ022J95
    CK18O010 KC2018 08 09.95713 17 50 54.58 +05 31 23.0                VEQ022J95
    CK18O010 KC2018 08 09.96411 17 50 51.28 +05 30 52.3                VEQ022J95
    CK18O010 KC2018 08 09.97429 17 50 46.39 +05 30 08.0          18.6 GVEQ022J95
    CK18O010 1C2018 08 10.20013 17 48 59.74 +05 13 44.2                LEQ022658
    CK18O010 1C2018 08 10.20078 17 48 59.44 +05 13 41.3                LEQ022658
    CK18O010 1C2018 08 10.20206 17 48 58.82 +05 13 35.4                LEQ022658
    CK18O010 1C2018 08 10.20270 17 48 58.53 +05 13 32.5                LEQ022658
    CK18O010 1C2018 08 10.20334 17 48 58.21 +05 13 29.8                LEQ022658
    CK18O010 KC2018 08 10.86653 17 43 51.04 +04 25 56.7          18.0 RVEQ022K38
    CK18O010 KC2018 08 10.89144 17 43 39.65 +04 24 10.6          18.3 RVEQ022K38
    CK18O010 KC2018 08 10.89864 17 43 36.40 +04 23 39.3          18.5 GVEQ022J77
    CK18O010 KC2018 08 10.90790 17 43 32.16 +04 23 00.0          18.7 GVEQ022J77
    CK18O010 KC2018 08 10.91550 17 43 28.54 +04 22 28.4          18.5 RqEQ022160
    CK18O010 KC2018 08 10.91648 17 43 28.19 +04 22 24.7          17.1 RVEQ022K38
    CK18O010 KC2018 08 10.91835 17 43 27.24 +04 22 16.4          18.1 RqEQ022160
    CK18O010 KC2018 08 10.91838 17 43 27.37 +04 22 15.5          18.7 GVEQ022J77
    CK18O010 KC2018 08 10.92120 17 43 25.94 +04 22 04.3          18.3 RqEQ022160
    CK18O010 KC2018 08 10.92196 17 43 25.73 +04 22 00.0          18.9 GVEQ022J77
    CK18O010 KC2018 08 10.92403 17 43 24.65 +04 21 52.3          19.2 RqEQ022160
    CK18O010 KC2018 08 10.92474 17 43 24.45 +04 21 48.4          18.7 GVEQ022J77
    CK18O010 KC2018 08 10.92685 17 43 23.35 +04 21 39.6          19.4 RqEQ022160
    CK18O010 KC2018 08 10.95595 17 43 10.80 +04 19 50.3          18.3 VUEQ022I19
    CK18O010 KC2018 08 10.95838 17 43 09.62 +04 19 40.2          18.4 VUEQ022I19
    CK18O010 KC2018 08 10.96102 17 43 08.47 +04 19 28.9          18.1 VUEQ022I19
    CK18O010 KC2018 08 11.87615 17 36 22.94 +03 15 31.6          17.7 RVEQ022K38
    CK18O010 KC2018 08 11.89347 17 36 15.31 +03 14 21.2          17.8 RVEQ022K38
    CK18O010 KC2018 08 11.91325 17 36 06.76 +03 12 59.7          18.2 RVEQ022K38
    CK18O010  C2018 08 12.37857 17 32 48.28 +02 41 30.3          18.3 cUEQ022T05
    CK18O010  C2018 08 12.38933 17 32 43.74 +02 40 46.7          18.3 cUEQ022T05
    CK18O010  C2018 08 12.40012 17 32 39.13 +02 40 03.6          18.7 cUEQ022T05
    CK18O010  C2018 08 12.41092 17 32 34.58 +02 39 19.8          18.8 cUEQ022T05
    CK18O010  C2018 08 13.29588917 26 31.591+01 40 54.80         18.8 GVEQ022F51
    CK18O010  C2018 08 13.30798617 26 26.642+01 40 06.89         18.3 GVEQ022F51
    CK18O010  C2018 08 13.32009017 26 21.804+01 39 20.74         18.9 GVEQ022F51
    CK18O010  C2018 08 13.33352617 26 16.369+01 38 28.30         18.8 GVEQ022F51
    CK18O010 KC2018 08 13.45285 17 25 28.93 +01 30 55.2                qEQ022E23
    CK18O010 KC2018 08 13.47428 17 25 20.30 +01 29 33.3          19.8 VqEQ022E23
    CK18O010 KC2018 08 13.48813 17 25 14.80 +01 28 39.4          19.6 VqEQ022E23
    CK18O010  C2018 08 14.34982 17 19 40.77 +00 34 01.7          18.7 oUEQ022T08
    CK18O010  C2018 08 14.36020 17 19 36.87 +00 33 23.8          18.1 oUEQ022T08
    CK18O010  C2018 08 14.37121 17 19 32.54 +00 32 43.4          18.5 oUEQ022T08
    CK18O010  C2018 08 14.38157 17 19 28.74 +00 32 04.2          18.4 oUEQ022T08
    CK18O010 KC2018 08 14.82294 17 16 44.37 +00 04 54.3          18.4 VqEQ022C95
    CK18O010 KC2018 08 14.83065 17 16 41.54 +00 04 26.6          18.4 VqEQ022C95
    CK18O010 KC2018 08 14.83836 17 16 38.67 +00 03 58.5          18.5 VqEQ022C95
    CK18O010 KC2018 08 14.84651 17 16 35.66 +00 03 29.1          18.6 VqEQ022C95
    CK18O010 KC2018 08 14.85422 17 16 32.80 +00 03 00.8          18.0 VqEQ022C95
    CK18O010 KC2018 08 14.86194 17 16 29.92 +00 02 32.4          18.4 VqEQ022C95
    CK18O010 KC2018 08 16.78410 17 05 19.65 -01 49 03.1          19.4 GVEQ022L29
    CK18O010 KC2018 08 16.78717 17 05 18.62 -01 49 13.3          18.7 GVEQ022L29
    CK18O010 KC2018 08 16.79019 17 05 17.59 -01 49 23.4          18.9 GVEQ022L29
    CK18O010 KC2018 08 16.79327 17 05 16.57 -01 49 33.7          19.0 GVEQ022L29
    CK18O010 KC2018 08 16.81834 17 05 08.36 -01 51 06.6          18.6 RqEQ022160
    CK18O010 KC2018 08 16.82314 17 05 06.75 -01 51 22.4          18.8 RqEQ022160
    CK18O010 KC2018 08 16.82809 17 05 05.15 -01 51 39.4          18.5 RqEQ022160
 
Observer details:
104 San Marcello Pistoiese.  Observers P. Bacci, M. Maestripieri.  Measurers
    P. Bacci, L. Tesi, G. Fagioli.  0.60-m reflector + CCD, 0.6-m f/4.0
    reflector + CCD.
118 Astronomical and Geophysical Observatory, Modra.  Observer S. Gajdos.
    0.6-m f/5.5 reflector + CCD.
157 Frasso Sabino.  Observers R. Haver, R. Gorelli.  Measurer R. Haver.
    0.37-m f/6.70 Cassegrain + CCD.
160 Castelmartini.  Observers M. Jaeger, E. Prosperi, S. Prosperi,
    W. Vollmann.  Measurer E. Prosperi.  0.35-m f/10 Schmidt-Cassegrain + CCD.
204 Schiaparelli Observatory.  Observer L. Buzzi.  0.84-m f/3.5 reflector +
    CCD.
215 Buchloe.  Observer W. Hasubick.  0.44-m f/4.6 reflector + CCD.
291 LPL/Spacewatch II.  Observers T. H. Bressi, M. J. Brucker.  1.8-m f/2.7
    reflector + CCD.
587 Sormano.  Observers A. Fumagalli, I. Proserpio, P. Sicoli, A. Testa.
    Measurer P. Sicoli.  0.5-m f/6.8 reflector + CCD.
595 Farra d'Isonzo.  Observer E. Pettarin.  0.61-m f/4.0 reflector + CCD.
658 National Research Council of Canada.  Observer D. D. Balam.  1.82-m
    reflector + CCD.
695 Kitt Peak.  Observer R. A. Mastaler.  2.3-m f/9 reflector + CCD.
711 McDonald Observatory, Fort Davis.  Observer J. G. Ries.  2.1-m reflector
    + CCD + focal reducer.
850 Cordell-Lorenz Observatory, Sewanee.  Observer D. T. Durig.  0.3-m f/9.4
    Schmidt-Cassegrain + 3072x2048 CCD.
A71 Stixendorf.  Observers M. Jaeger, E. Prosperi, S. Prosperi, W. Vollmann.
    Measurer M. Jaeger.  0.3-m f/4 reflector + CCD.
B37 Obs. de L' Ametlla del Valles, Barcelona.  Observer A. Garrigos.  0.51-m
    f/4 reflector + CCD.
B49 Paus Observatory, Sabadell.  Observer J. Camarasa.  0.30-m f/4 Newtonian
    reflector + CCD.
B74 Santa Maria de Montmagastrell.  Observer J. M. Bosch.  0.40-m f/10
    Schmidt-Cassegrain + CCD.
B96 Brixiis Observatory, Kruibeke.  Observer E. Bryssinck.  0.4-m f/3.8
    astrograph + CCD.
C10 Maisoncelles.  Observer J.-F. Soulier.  0.30-m f/3.8 Newtonian reflector
    + CCD.
C23 Olmen.  Observer A. Diepvens.  0.20-m f/9 refractor + CCD.
C43 Hoyerswerda.  Observer P. Lindner.  0.30-m f/6.3 Schmidt-Cassegrain + CCD.
C47 Nonndorf.  Observer G. Dangl.  0.25-m f/4.8 reflector + CCD.
C77 Bernezzo Observatory.  Observer A. Mantero.  0.25-m f/4.0 reflector + CCD.
C95 SATINO Remote Observatory, Haute Provence.  Observer J. Jahn.  0.60-m
    f/3.2 Newtonian reflector + CCD.
E23 Arcadia.  Observer A. Hidas.  0.35-m f/1.9 reflector + CCD.
F51 Pan-STARRS 1, Haleakala.  Observers J. Bulger, T. Lowe, A. Schultz,
    M. Willman.  Measurers K. Chambers, S. Chastel, L. Denneau, H. Flewelling,
    M. Huber, E. Magnier, Y. Ramanjooloo, R. Wainscoat, R. Weryk.  1.8-m
    Ritchey-Chretien + CCD.
G40 Slooh.com Canary Islands Observatory.  Observer J. Tuten.  Measurer
    B. Lutkenhoner.  0.43-m f/6.8 Corrected Dall-Kirkham + CCD.
H06 iTelescope Observatory, Mayhill.  Observer H. Sato.  0.43-m f/6.8
    astrograph + CCD + f/4.5 focal reducer.
H21 Astronomical Research Observatory, Westfield.  Observer R. Holmes.
    Measurers S. Foglia, L. Buzzi, T. Linder, R. Holmes.  0.81-m f/4.0
    astrograph + CCD.
H36 Sandlot Observatory, Scranton.  Observer G. Hug.  0.56-m reflector + CCD.
I19 Observatorio El Gato Gris, Tanti.  Observer C. Colazo.  0.36-m f/10.70
    Schmidt-Cassegrain + CCD.
J22 Tacande Observatory, La Palma.  Observer K. Hills.  0.5-m f/2.9
    astrograph + CCD.
J77 Golden Hill Observatory, Stourton Caundle.  Observer R. Miles.  0.35-m
    f/8 Schmidt-Cassegrain + CCD.
J95 Great Shefford.  Observer P. Birtwhistle.  0.40-m f/6.0
    Schmidt-Cassegrain + CCD.
K38 M57 Observatory, Saltrio.  Observer G. Baj.  0.30-m f/5.5
    Ritchey-Chretien + CCD, 0.3-m f/5.5 Ritchey-Chretien + CCD.
K63 G. Pascoli Observatory, Castelvecchio Pascoli.  Observer R. Bacci.
    0.41-m f/3.2 Newtonian reflector + CCD.
K87 Dettelbach Vineyard Observatory.  Observer B. Haeusler.  0.30-m
    Schmidt-Cassegrain + CCD.
K88 GINOP-KHK, Piszkesteto.  Observers K. Sarneczky, A. Bodi.  Measurer
    K. Sarneczky.  0.60-m Schmidt + CCD.
L01 Visnjan Observatory, Tican.  Observers K. Korlevic, G. Kervina,
    F. Hrzenjak, E. Pettarin.  Measurers K. Korlevic, E. Pettarin.  1.0-m
    f/2.9 reflector + CCD.
L04 ROASTERR-1 Observatory, Cluj-Napoca.  Observer L. Hudin.  0.3-m f/5
    reflector + CCD.
L29 Drebach-South Observatory, Windhoek.  Observer G. Lehmann.  0.4-m f/3.6
    reflector + CCD.
P93 Space Tracking and Communications Center, JAXA.  Observers S. Urakawa,
    T. Fujiwara.  1.0-m f/3.0 reflector + CCD.
Q11 Shinshiro.  Observer T. Ikemura.  Measurer H. Sato.  0.35-m f/5 reflector
    + CCD.
T05 ATLAS-HKO, Haleakala.  Observers L. Denneau, H. Flewelling, A. Heinze,
    H. Weiland, J. Tonry.  Measurers L. Denneau, H. Flewelling, A. Heinze,
    J. Tonry, A. Fitzsimmons, D. Young.  0.5-m f/2.0 Schmidt + CCD.
T08 ATLAS-MLO, Mauna Loa.  Observers L. Denneau, H. Flewelling, A. Heinze,
    H. Weiland, J. Tonry.  Measurers L. Denneau, H. Flewelling, A. Heinze,
    J. Tonry, A. Fitzsimmons, D. Young.  0.5-m f/2.0 Schmidt + CCD.
W25 RMS Observatory, Cincinnati.  Observer B. Rowe.  0.35-m f/7.0
    Schmidt-Cassegrain + CCD.
Z80 Northolt Branch Observatory.  Observer G. Wells.  Measurer D. Bamberger.
    0.25-m f/8 Ritchey-Chretien + CCD, 0.25-m f/8.0 Ritchey-Chretien + CCD.
 
Orbital elements:
    C/2018 O1 (ATLAS)
Epoch 2018 Aug. 30.0 TT = JDT 2458360.5
T 2018 Aug. 31.57674 TT                                 MPCW
q   1.5581463            (2000.0)            P               Q
n   0.00672211     Peri.  162.50810     +0.23040880     -0.86927178
a  27.8055955      Node    87.62021     -0.93693325     -0.07679325
e   0.9439629      Incl.  154.04078     -0.26280767     -0.48833325
P 147
>From 311 observations 2018 July 15-Aug. 16, mean residual 0".5.

    C/2018 O1 (ATLAS)
Epoch 2018 Mar. 23.0 TT = JDT 2458200.5
T 2018 Aug. 31.56911 TT                                 MPCW
q   1.5581888            (2000.0)            P               Q
n   0.00671775     Peri.  162.50171     +0.23047832     -0.86925411
a  27.8176289      Node    87.61857     -0.93693062     -0.07687530
e   0.9439856      Incl.  154.04084     -0.26275607     -0.48835180
P 147
>From 311 observations 2018 July 15-Aug. 16, mean residual 0".5.

Ephemeris:
    C/2018 O1 (ATLAS)
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase   m1    m2
2018 07 18    21 39 12.1 +27 12 49   0.8641  1.6672   124.7    30.1  18.9
...
2018 08 02    19 05 40.7 +15 44 21   0.7024  1.6074   138.1    25.0  18.3
...
2018 08 10    17 50 34.8 +05 28 27   0.7728  1.5846   124.4    31.8  18.4
...
2018 08 16    17 09 44.7 -01 04 39   0.8833  1.5720   111.8    36.7  18.7
2018 08 17    17 04 09.2 -02 01 01   0.9051  1.5703   109.8    37.3  18.7
2018 08 18    16 58 52.1 -02 54 47   0.9276  1.5687   107.9    37.9  18.8
...
2018 08 24    16 32 48.4 -07 28 16   1.0746  1.5614    96.9    40.0  19.1
...
2018 09 01    16 09 24.0 -11 51 03   1.2892  1.5582    84.4    40.1  19.5
...
2018 09 16    15 45 42.9 -17 06 08   1.7002  1.5717    65.2    35.5  20.1

Gareth V. Williams           (C) Copyright 2018 MPC           M.P.E.C. 2018-Q22



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