[Iaude] MPEC X135: COMET C/2018 X2 (Fitzsimmons)

mpec at mpcdb1.cfa.harvard.edu mpec at mpcdb1.cfa.harvard.edu
Sat Dec 15 15:03:17 EST 2018


M.P.E.C. 2018-X135                               Issued 2018 Dec. 15, 19:36 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 X2 (Fitzsimmons)

     This object was reported as a potential comet by A. Fitzsimmons (T05), who
described it as having a 8"-10" coma in stacked images taken on Dec. 8.  In
images obtained with the CFHT (568) on Dec. 9, R. Weryk reported that object
had a FWHM of 1".3 (compared to 0".77 +/- 0".03 for nearby stars) and an
obvious ~10" tail extending almost directly south.  K. Sarneczky (K88) reported
that six stacked 120s exposures on Dec. 10.9 UTC showed a strongly-condensed
6" coma and a 10" tail in P.A.. 180.  R. Furgoni (K51) reported a very faint
coma and a hint of a 15" tail in P.A. 180 on Dec. 11.8 UCT.  H. Sato (Q11)
reported a strongly-condensed 9" coma and a 11" tail in P.A. 183 on ten
stacked 60s exposures on Dec. 13.6 UTC.  L. Buzzi (204, Dec. 15.0 UTC)
reported a compact 10" coma and a broad ~13" tail centered in P.A. 177.

Observations:
    CK18X020* C2018 12 08.46539 04 03 17.97 +54 03 05.1          19.1 cVEX135T05
    CK18X020  C2018 12 08.47818 04 03 17.13 +54 03 01.4          19.2 cVEX135T05
    CK18X020  C2018 12 08.48597 04 03 16.60 +54 03 03.7          19.4 cVEX135T05
    CK18X020  C2018 12 08.49597 04 03 15.80 +54 03 01.6          19.0 cVEX135T05
    CK18X020 ^C2018 12 09.40512404 02 17.123+54 01 23.44         19.09GVEX135568
    CK18X020 ^C2018 12 09.40630604 02 17.044+54 01 23.27         19.06GVEX135568
    CK18X020 ^C2018 12 09.40748404 02 16.965+54 01 23.13         19.05GVEX135568
    CK18X020  C2018 12 09.96391404 01 41.12 +54 00 13.6          18.7 GVEX135C95
    CK18X020  C2018 12 09.96755604 01 40.84 +54 00 12.8          18.6 GVEX135C95
    CK18X020  C2018 12 09.97122904 01 40.59 +54 00 12.3          18.5 GVEX135C95
    CK18X020  C2018 12 09.97490004 01 40.40 +54 00 10.7          19.5 GVEX135C95
    CK18X020  C2018 12 09.99330504 01 39.01 +54 00 08.8          19.3 GVEX135C95
    CK18X020  C2018 12 10.00903 04 01 38.09 +54 00 07.4          19.4 VSEX135033
    CK18X020  C2018 12 10.00982 04 01 38.04 +54 00 07.2          19.4 VSEX135033
    CK18X020  C2018 12 10.01060 04 01 37.98 +54 00 07.3          20.1 VSEX135033
    CK18X020  C2018 12 10.01869 04 01 37.46 +54 00 05.8          19.3 VSEX135033
    CK18X020  C2018 12 10.01948 04 01 37.40 +54 00 05.7          19.1 VSEX135033
    CK18X020  C2018 12 10.12807 04 01 30.87 +53 59 52.7          18.8 GVEX135I52
    CK18X020  C2018 12 10.13362 04 01 30.52 +53 59 52.6          18.9 GVEX135I52
    CK18X020  C2018 12 10.13912 04 01 30.11 +53 59 52.4          18.8 GVEX135I52
    CK18X020 |C2018 12 10.24599 04 01 23.00 +53 59 38.1                VEX135H06
    CK18X020 |C2018 12 10.24801 04 01 22.85 +53 59 38.1                VEX135H06
    CK18X020 |C2018 12 10.25003 04 01 22.72 +53 59 37.6          18.1 GVEX135H06
    CK18X020 KC2018 12 10.77855 04 00 49.17 +53 58 23.9          18.0 RVEX135K38
    CK18X020 KC2018 12 10.80313 04 00 47.43 +53 58 19.5          18.6 VqEX135C77
    CK18X020 KC2018 12 10.82731 04 00 46.10 +53 58 17.4          18.9 VqEX135C77
    CK18X020 IC2018 12 10.83391904 00 45.54 +53 58 17.3          19.0 GVEX135L01
    CK18X020 KC2018 12 10.83903 04 00 45.18 +53 58 15.4          17.6 RVEX135K38
    CK18X020 KC2018 12 10.85161 04 00 44.33 +53 58 14.3          17.9 RVEX135K38
    CK18X020 KC2018 12 10.85688 04 00 44.08 +53 58 13.3          18.9 VqEX135C77
    CK18X020 IC2018 12 10.86333204 00 43.65 +53 58 13.7          19.1 GVEX135L01
    CK18X020 KC2018 12 10.90150 04 00 41.12 +53 58 07.5          18.6 RqEX135L27
    CK18X020 KC2018 12 10.92096 04 00 39.84 +53 58 04.7          18.6 RqEX135L27
    CK18X020 KC2018 12 10.93757 04 00 38.68 +53 58 02.9          18.3 RoEX135K88
    CK18X020 KC2018 12 10.94051 04 00 38.53 +53 58 01.8          18.5 RqEX135L27
    CK18X020 KC2018 12 10.94243 04 00 38.34 +53 58 02.5          18.9 RoEX135K88
    CK18X020 KC2018 12 10.94730 04 00 38.12 +53 58 01.8          18.4 RoEX135K88
    CK18X020 KC2018 12 10.95216 04 00 37.69 +53 58 01.0          18.6 RoEX135K88
    CK18X020 9C2018 12 10.95558 04 00 37.67 +53 58 01.9                UEX135G40
    CK18X020 9C2018 12 10.96544 04 00 37.05 +53 58 00.2          18.2 VUEX135G40
    CK18X020 KC2018 12 11.76926 03 59 46.16 +53 55 58.4          19.7 GVEX135Z99
    CK18X020 KC2018 12 11.77251 03 59 45.92 +53 55 58.2          19.7 GVEX135Z99
    CK18X020 KC2018 12 11.77496 03 59 45.72 +53 55 57.9          19.4 GVEX135Z99
    CK18X020 KC2018 12 11.78402 03 59 45.21 +53 55 56.6          18.2 RVEX135K38
    CK18X020 KC2018 12 11.81458 03 59 43.27 +53 55 52.2          18.2 RVEX135K38
    CK18X020 KC2018 12 11.82438 03 59 42.54 +53 55 51.4          18.9 VtEX135L04
    CK18X020 KC2018 12 11.83244 03 59 42.00 +53 55 50.0          18.9 VtEX135L04
    CK18X020 KC2018 12 11.83877 03 59 41.66 +53 55 49.6          19.0 VtEX135L04
    CK18X020  C2018 12 11.84635 03 59 41.18 +53 55 48.2          18.5 RrEX135106
    CK18X020  C2018 12 11.85912 03 59 40.34 +53 55 45.9          17.9 RVEX135K51
    CK18X020  C2018 12 11.86189 03 59 40.17 +53 55 45.5          18.3 RrEX135106
    CK18X020  C2018 12 11.86340 03 59 40.07 +53 55 45.4          17.8 RVEX135K51
    CK18X020 KC2018 12 11.87152 03 59 39.52 +53 55 43.6          18.0 RVEX135K38
    CK18X020  C2018 12 11.87743 03 59 39.28 +53 55 43.1          17.6 RrEX135106
    CK18X020  C2018 12 11.89297 03 59 38.14 +53 55 40.6          18.2 RrEX135106
    CK18X020 KC2018 12 11.91613 03 59 36.69 +53 55 35.8          18.9 RqEX135L27
    CK18X020 KC2018 12 11.93955 03 59 35.13 +53 55 33.2          19.0 RqEX135L27
    CK18X020 KC2018 12 11.96297 03 59 33.67 +53 55 29.0          18.9 RqEX135L27
    CK18X020  C2018 12 12.15677 03 59 21.70 +53 54 59.0          18.8 GVEX135I52
    CK18X020 KC2018 12 12.15895 03 59 21.35 +53 54 59.2          18.7 RuEX135850
    CK18X020  C2018 12 12.16345 03 59 21.27 +53 54 58.3          18.9 GVEX135I52
    CK18X020 KC2018 12 12.16602 03 59 20.96 +53 54 57.2          18.7 RuEX135850
    CK18X020  C2018 12 12.16887 03 59 20.93 +53 54 58.0          18.8 GVEX135I52
    CK18X020 KC2018 12 12.17311 03 59 20.53 +53 54 58.6          19.0 RuEX135850
    CK18X020  C2018 12 12.17784 03 59 20.35 +53 54 55.8          18.8 GVEX135I52
    CK18X020 KC2018 12 12.91321803 58 34.14 +53 52 51.7          19.1 GVEX135Z80
    CK18X020 KC2018 12 12.92241903 58 33.42 +53 52 50.4          19.0 GVEX135Z80
    CK18X020 KC2018 12 12.93167803 58 33.04 +53 52 49.3          18.9 GVEX135Z80
    CK18X020  C2018 12 13.11238 03 58 21.98 +53 52 18.5          18.9 GVEX135I52
    CK18X020  C2018 12 13.11798 03 58 21.67 +53 52 17.5          19.0 GVEX135I52
    CK18X020  C2018 12 13.12561 03 58 21.13 +53 52 15.3          18.5 GVEX135I52
    CK18X020  C2018 12 13.13126 03 58 20.87 +53 52 14.4          20.0 GVEX135I52
    CK18X020 KC2018 12 13.63011 03 57 49.51 +53 50 46.0          18.0 RqEX135Q11
    CK18X020 KC2018 12 13.63732 03 57 49.04 +53 50 44.6                qEX135Q11
    CK18X020 KC2018 12 13.65895 03 57 47.66 +53 50 40.7                qEX135Q11
    CK18X020  C2018 12 14.37219 03 57 03.81 +53 48 25.8          18.2 GVEX135I52
    CK18X020  C2018 12 14.37809 03 57 03.48 +53 48 24.6          18.5 GVEX135I52
    CK18X020  C2018 12 14.38986 03 57 02.67 +53 48 22.6          18.2 GVEX135I52
    CK18X020 KC2018 12 15.05110 03 56 22.63 +53 46 10.6          18.8 GVEX135204
    CK18X020 KC2018 12 15.05812 03 56 22.20 +53 46 09.0                VEX135204
    CK18X020 KC2018 12 15.06515 03 56 21.76 +53 46 07.4                VEX135204
    CK18X020 KC2018 12 15.06981 03 56 21.48 +53 46 05.8          17.9 RVEX135K38
    CK18X020 KC2018 12 15.08510 03 56 20.52 +53 46 03.0          18.0 RVEX135K38
    CK18X020 KC2018 12 15.10039 03 56 19.67 +53 45 59.8          17.5 RVEX135K38
 
Observer details:
033 Karl Schwarzschild Observatory, Tautenburg.  Observers C. Hoegner,
    B. Stecklum.  Measurer B. Stecklum.  1.34-m f/3 Schmidt + CCD.
106 Crni Vrh.  Observer S. Maticic.  0.6-m f/3.3 Deltagraph + CCD.
204 Schiaparelli Observatory.  Observer L. Buzzi.  0.60-m f/4.64 reflector +
    CCD.
568 Mauna Kea.  Observers R. Wainscoat, C. Crowder, T. Burdullis.  Measurers
    R. Weryk, R. Wainscoat.  3.6-m Canada-France-Hawaii Telescope + CCD.
850 Cordell-Lorenz Observatory, Sewanee.  Observers D. T. Durig,
    T. R. Potter.  0.3-m f/7.6 Schmidt-Cassegrain + 1536x1024 CCD.
C77 Bernezzo Observatory.  Observer A. Mantero.  0.25-m f/1000.0 reflector +
    CCD.
C95 SATINO Remote Observatory, Haute Provence.  Observer J. Jahn.  0.60-m
    f/3.2 Newtonian reflector + CCD.
G40 Slooh.com Canary Islands Observatory.  Observer 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.
I52 Steward Observatory, Mt. Lemmon Station.  Observers G. J. Leonard,
    H. Groeller.  Measurers B. M. Africano, E. J. Christensen, G. A. Farneth,
    D. C. Fuls, A. R. Gibbs, A. D. Grauer, H. Groeller, R. A. Kowalski,
    S. M. Larson, G. J. Leonard, R. L. Seaman, F. C. Shelly.  1.0-m reflector
    + CCD.
K38 M57 Observatory, Saltrio.  Observer G. Baj.  0.3-m f/5.5 Ritchey-Chretien
    + CCD.
K51 Osservatorio del Celado, Castello Tesino.  Observers G. Favero,
    R. Furgoni.  Measurer R. Furgoni.  0.80-m f/4 reflector + CCD.
K88 GINOP-KHK, Piszkesteto.  Observer K. Sarneczky.  0.60-m Schmidt + CCD.
L01 Visnjan Observatory, Tican.  Observer K. Korlevic.  1.0-m f/2.9 reflector
    + CCD.
L04 ROASTERR-1 Observatory, Cluj-Napoca.  Observer L. Hudin.  0.3-m f/5
    reflector + CCD.
L27 29PREMOTE Observatory, Dauban.  Observer J.-F. Soulier.  0.20-m f/4
    Newtonian 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, N. Erasmus.  0.5-m f/2.0 Schmidt +
    CCD.
Z80 Northolt Branch Observatory.  Observer G. Wells.  Measurer D. Bamberger.
    0.25-m f/8.0 Ritchey-Chretien + CCD.
Z99 Clixby Observatory, Cleethorpes.  Observer A. Mickleburgh.  0.36-m f/8
    Schmidt-Cassegrain + CCD.
 
Orbital elements:
    C/2018 X2 (Fitzsimmons)
Epoch 2019 July 16.0 TT = JDT 2458680.5
T 2019 July 8.84439 TT                                  MPCW
q   2.1267778            (2000.0)            P               Q
z  +0.0067370      Peri.  162.07175     -0.80580428     -0.57804231
 +/-0.0037777      Node   340.84126     +0.48392693     -0.51757703
e   0.9856719      Incl.   23.07602     +0.34131247     -0.63085743
>From 83 observations 2018 Dec. 8-15, mean residual 0".5.

    C/2018 X2 (Fitzsimmons)
Epoch 2019 Apr. 27.0 TT = JDT 2458600.5
T 2019 July 8.84426 TT                                  MPCW
q   2.1267740            (2000.0)            P               Q
z  +0.0067053      Peri.  162.07115     -0.80580684     -0.57804062
 +/-0.0037777      Node   340.84215     +0.48392288     -0.51758628
e   0.9857393      Incl.   23.07550     +0.34131215     -0.63085139
>From 83 observations 2018 Dec. 8-15, mean residual 0".5.

Ephemeris:
    C/2018 X2 (Fitzsimmons)
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase   m1    m2
2018 11 15    04 27 23.3 +53 32 08   2.5400  3.3785   142.4    10.3  19.3
...
2018 11 30    04 12 33.8 +54 07 58   2.3853  3.2595   147.4     9.4  19.0
...
2018 12 08    04 03 48.5 +54 03 50   2.3252  3.1968   147.0     9.7  18.9
...
2018 12 14    03 57 26.9 +53 49 37   2.2905  3.1502   145.3    10.2  18.8
2018 12 15    03 56 26.0 +53 46 21   2.2856  3.1424   144.9    10.4  18.8
2018 12 16    03 55 26.1 +53 42 50   2.2809  3.1347   144.5    10.5  18.8
...
2018 12 22    03 49 52.1 +53 16 54   2.2576  3.0886   141.5    11.4  18.7
...
2018 12 30    03 43 54.1 +52 30 54   2.2390  3.0277   136.4    13.0  18.6
...
2019 01 14    03 38 36.7 +50 40 43   2.2381  2.9158   125.0    16.0  18.4

Gareth V. Williams           (C) Copyright 2018 MPC           M.P.E.C. 2018-X135



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