[Iaude] MPEC E17: A/2017 U7

mpec at mpcdb1.cfa.harvard.edu mpec at mpcdb1.cfa.harvard.edu
Sun Mar 4 17:33:17 EST 2018


M.P.E.C. 2018-E17                                Issued 2018 Mar. 4, 22:15 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


                                   A/2017 U7
 
Observations:
    AK17U070  C2017 08 18.53258 01 51 30.893-32 48 26.90         23.1 wLEE017F51
    AK17U070  C2017 08 18.53969 01 51 30.686-32 48 30.15         23.0 wLEE017F51
    AK17U070  C2017 08 18.55397 01 51 30.248-32 48 36.25               LEE017F51
    AK17U070  C2017 09 13.47314 01 35 22.184-35 57 56.51         22.4 iLEE017F51
    AK17U070  C2017 09 13.48241 01 35 21.784-35 58 00.16         21.9 iLEE017F51
    AK17U070  C2017 09 13.49166 01 35 21.359-35 58 04.06         22.5 iLEE017F51
    AK17U070  C2017 09 13.50093 01 35 20.903-35 58 08.01         22.8 iLEE017F51
    AK17U070  C2017 10 07.39378 01 14 51.282-38 15 13.58         20.9 iLEE017F51
    AK17U070  C2017 10 07.40278 01 14 50.783-38 15 15.88         21.0 iLEE017F51
    AK17U070  C2017 10 07.41178 01 14 50.279-38 15 18.41         20.8 iLEE017F51
    AK17U070  C2017 10 07.42079 01 14 49.770-38 15 20.73         20.8 iLEE017F51
    AK17U070* C2017 10 29.32588 00 54 27.777-39 20 56.27         20.1 iLEE017F51
    AK17U070  C2017 10 29.32588 00 54 27.777-39 20 56.27         20.1 iLEE017F51
    AK17U070  C2017 10 29.33443 00 54 27.308-39 20 56.82         20.1 iLEE017F51
    AK17U070  C2017 10 29.33443 00 54 27.308-39 20 56.82         20.1 iLEE017F51
    AK17U070  C2017 10 29.34296 00 54 26.848-39 20 57.72         20.1 iLEE017F51
    AK17U070  C2017 10 29.34296 00 54 26.848-39 20 57.72         20.1 iLEE017F51
    AK17U070 |C2017 10 30.19858 00 53 40.47 -39 22 10.9          20.3 VuEE017807
    AK17U070 |C2017 10 30.20160 00 53 40.29 -39 22 11.1          20.3 VuEE017807
    AK17U070 |C2017 10 30.20461 00 53 40.14 -39 22 11.4          20.3 VuEE017807
    AK17U070 |C2017 10 31.06191 00 52 54.02 -39 23 19.3          19.9 VuEE017807
    AK17U070 |C2017 10 31.06392 00 52 53.90 -39 23 19.4          20.1 VuEE017807
    AK17U070 |C2017 10 31.06596 00 52 53.79 -39 23 19.6          20.1 VuEE017807
    AK17U070 |C2017 10 31.06798 00 52 53.67 -39 23 19.8          20.1 VuEE017807
    AK17U070 |C2017 11 01.11730 00 51 57.42 -39 24 35.0          20.2 GUEE017807
    AK17U070 |C2017 11 01.11933 00 51 57.32 -39 24 35.1          20.1 GUEE017807
    AK17U070 |C2017 11 01.12135 00 51 57.20 -39 24 35.2          20.0 GUEE017807
    AK17U070 |C2017 11 06.19763 00 47 31.00 -39 28 33.9          20.1 GUEE017807
    AK17U070 |C2017 11 06.20227 00 47 30.76 -39 28 34.1          20.1 GUEE017807
    AK17U070 |C2017 11 06.20672 00 47 30.53 -39 28 34.2          20.1 GUEE017807
    AK17U070  C2017 11 06.28926 00 47 26.350-39 28 37.14         20.0 iLEE017F51
    AK17U070  C2017 11 06.29896 00 47 25.845-39 28 37.55         20.3 iLEE017F51
    AK17U070  C2017 11 06.30865 00 47 25.331-39 28 37.69         20.5 iLEE017F51
    AK17U070  C2017 11 06.31835 00 47 24.826-39 28 37.87         20.3 iLEE017F51
    AK17U070 1C2017 11 07.43401 00 46 27.86 -39 29 01.7                vEE017Q62
    AK17U070 1C2017 11 07.43652 00 46 27.76 -39 29 01.6                vEE017Q62
    AK17U070 1C2017 11 07.43903 00 46 27.64 -39 29 01.5          19.2 wvEE017Q62
    AK17U070  C2017 11 22.25466 00 34 52.856-39 20 04.39         20.2 wLEE017F51
    AK17U070  C2017 11 22.26450 00 34 52.434-39 20 03.59         20.2 wLEE017F51
    AK17U070  C2017 11 22.27434 00 34 52.022-39 20 02.78         20.2 wLEE017F51
    AK17U070  C2017 11 22.28417 00 34 51.598-39 20 01.84         20.3 wLEE017F51
    AK17U070 4C2017 11 22.47907 00 34 43.31 -39 19 43.8          19.8 RvEE017E10
    AK17U070 4C2017 11 22.48125 00 34 43.22 -39 19 43.6          19.8 RvEE017E10
    AK17U070 4C2017 11 22.48343 00 34 43.13 -39 19 43.5          19.7 RvEE017E10
    AK17U070 _C2017 11 24.28167200 33 28.218-39 16 56.59         20.3 GUEE017568
    AK17U070 _C2017 11 24.28303400 33 28.164-39 16 56.47         20.2 GUEE017568
    AK17U070 _C2017 11 24.28421400 33 28.109-39 16 56.39         20.3 GUEE017568
    AK17U070  C2017 12 01.04379200 29 06.15 -39 03 36.3          19.1 RtEE017W85
    AK17U070  C2017 12 01.04637100 29 06.08 -39 03 35.6          19.0 RtEE017W85
    AK17U070  C2017 12 01.04895100 29 05.96 -39 03 35.7          18.9 RtEE017W85
    AK17U070  C2017 12 01.05153100 29 05.86 -39 03 35.1          18.9 RtEE017W85
    AK17U070  C2017 12 08.17669200 25 05.06 -38 45 19.9          19.3 RtEE017W87
    AK17U070  C2017 12 08.17997000 25 04.97 -38 45 19.5          18.8 RtEE017W87
    AK17U070  C2017 12 08.18325200 25 04.86 -38 45 18.9          18.7 RtEE017W87
    AK17U070  C2017 12 08.18653400 25 04.76 -38 45 18.1          19.3 RtEE017W87
    AK17U070 KC2017 12 18.82050800 20 14.927-38 11 39.16         19.2 GUEE017J04
    AK17U070 KC2017 12 18.82491400 20 14.832-38 11 38.13         19.1 GUEE017J04
    AK17U070 KC2017 12 18.82931700 20 14.717-38 11 37.20         19.3 GUEE017J04
    AK17U070 |C2017 12 22.09066 00 19 02.42 -38 00 03.6          19.8 VuEE017807
    AK17U070 |C2017 12 22.09532 00 19 02.32 -38 00 02.8          19.9 VuEE017807
    AK17U070 |C2017 12 22.09997 00 19 02.22 -38 00 01.6          19.9 VuEE017807
    AK17U070 |C2017 12 25.04511 00 18 03.63 -37 49 12.9          19.6 VuEE017807
    AK17U070 |C2017 12 25.04975 00 18 03.53 -37 49 12.1          19.7 VuEE017807
    AK17U070 |C2017 12 25.05440 00 18 03.46 -37 49 11.0          19.6 VuEE017807
    AK17U070 KC2017 12 30.07204 00 16 37.79 -37 30 05.2          19.1 RoEE017291
    AK17U070 KC2017 12 30.08498 00 16 37.58 -37 30 02.2          19.7 RoEE017291
    AK17U070 KC2017 12 30.09792 00 16 37.33 -37 29 59.6          19.8 RoEE017291
    AK17U070 |C2018 01 03.06884 00 15 41.76 -37 14 22.4          19.4 GUEE017807
    AK17U070 |C2018 01 03.07357 00 15 41.70 -37 14 21.2          19.5 GUEE017807
    AK17U070 |C2018 01 03.07851 00 15 41.64 -37 14 20.0          19.5 GUEE017807
    AK17U070 1C2018 01 06.43679 00 15 02.77 -37 00 52.8                vEE017Q62
    AK17U070 1C2018 01 06.43928 00 15 02.72 -37 00 52.4                vEE017Q62
    AK17U070 1C2018 01 06.44176 00 15 02.67 -37 00 52.1          19.3 wvEE017Q62
    AK17U070 |C2018 01 09.05225 00 14 37.43 -36 50 17.9          19.6 VuEE017807
    AK17U070 |C2018 01 09.05685 00 14 37.39 -36 50 16.8          19.6 VuEE017807
    AK17U070 |C2018 01 11.05359 00 14 20.98 -36 42 08.9          19.7 VuEE017807
    AK17U070 |C2018 01 11.05822 00 14 20.94 -36 42 07.7          19.5 VuEE017807
    AK17U070 |C2018 01 11.06288 00 14 20.90 -36 42 06.5          19.4 VuEE017807
    AK17U070 |C2018 01 20.05253 00 13 36.25 -36 05 18.7          19.5 GUEE017807
    AK17U070 |C2018 01 20.05556 00 13 36.24 -36 05 18.0          19.6 GUEE017807
    AK17U070 |C2018 01 20.05892 00 13 36.24 -36 05 17.2          19.5 GUEE017807
    AK17U070 |C2018 01 26.04131 00 13 31.07 -35 41 00.7          18.9 GUEE017807
    AK17U070 |C2018 01 26.04472 00 13 31.07 -35 41 00.0          19.3 GUEE017807
    AK17U070 |C2018 01 26.04814 00 13 31.07 -35 40 59.1          19.3 GUEE017807
    AK17U070 |C2018 01 28.04406 00 13 33.36 -35 32 59.5          19.0 GUEE017807
    AK17U070 |C2018 01 28.04783 00 13 33.36 -35 32 58.8          19.1 GUEE017807
    AK17U070 |C2018 01 28.05163 00 13 33.35 -35 32 57.5          19.0 GUEE017807
    AK17U070 |C2018 02 10.04925 00 14 31.39 -34 42 50.1          19.1 GUEE017807
    AK17U070 |C2018 02 10.05179 00 14 31.40 -34 42 49.5          19.2 GUEE017807
    AK17U070 |C2018 02 10.05468 00 14 31.42 -34 42 48.8          19.3 GUEE017807
 
Observer details:
291 LPL/Spacewatch II.  Observer T. H. Bressi.  1.8-m f/2.7 reflector + CCD.
568 Mauna Kea.  Observers K. J. Meech, J. Kleyna, C. Wipper.  Measurers
    M. Micheli, J. Kleyna. 3.6-m Canada-France-Hawaii Telescope + CCD.
807 Cerro Tololo.  Observers T. Linder, R. Holmes.  0.61-m f/6.5 astrograph
    + CCD, 1.00-m f/10.0 astrograph + CCD.
E10 Siding Spring-Faulkes Telescope South.  Observers P. Miller, E. Gomez,
    R. Holmes, R. Miles, T. Linder, L. Buzzi, S. Foglia.  Measurers S. Foglia,
    L. Buzzi.  2.0-m f/10.0 Ritchey-Chretien + 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. Lilly, E. Magnier, R. Wainscoat, C. Waters, R. Weryk.
    1.8-m Ritchey-Chretien + CCD.
J04 ESA Optical Ground Station, Tenerife.  Observer D. Abreu.  Measurers
    M. Micheli, D. Koschny, A. Knoefel, M. Busch, E. Schwab.  1.0-m f/4.4
    reflector + CCD.
Q62 iTelescope Observatory, Siding Spring.  Observer H. Sato. 0.51-m f/6.8
    astrograph + CCD + f/4.5 focal reducer.
W85 Cerro Tololo-LCO A.  Observers J. D. Armstrong, Z. N. Teagarden,
    S. W. Ryden.  1.0-m f/8 Ritchey-Chretien + CCD.
W87 Cerro Tololo-LCO C.  Observers J. D. Armstrong, S. R. Moss.  1.0-m f/8
    Ritchey-Chretien + CCD.
 
Orbital elements:
    A/2017 U7
Epoch 2019 Aug. 25.0 TT = JDT 2458720.5
T 2019 Sept. 11.21093 TT                                MPCW
q   6.4178352            (2000.0)            P               Q
z  -0.0001150      Peri.  326.02357     +0.53158001     -0.59451857
 +/-0.0000023      Node   276.23314     -0.57718434     -0.77555085
e   1.0007381      Incl.  142.63523     -0.61990397     +0.21229355
>From 87 observations 2017 Aug. 18-2018 Feb. 10, mean residual 0".2.

    A/2017 U7
Epoch 2018 Mar. 23.0 TT = JDT 2458200.5
T 2019 Sept. 10.52791 TT                                MPCW
q   6.4186788            (2000.0)            P               Q
z  -0.0002310      Peri.  325.96205     +0.53209421     -0.59409020
 +/-0.0000023      Node   276.22261     -0.57644877     -0.77605843
e   1.0014825      Incl.  142.63838     -0.62014722     +0.21163680
>From 87 observations 2017 Aug. 18-2018 Feb. 10, mean residual 0".2.

   The original barycentric 1/a value is +0.00011957 au^-1 and the future
barycentric 1/a value is -0.00000374 au^-1.


Ephemeris:
    A/2017 U7
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase   m1    m2
2018 02 02    00 13 47.0 -35 13 26   8.1675  7.5219    46.4     5.4        20.7
...
2018 02 17    00 15 29.3 -34 17 59   8.2282  7.4714    37.7     4.6        20.6
...
2018 02 25    00 16 54.5 -33 51 37   8.2393  7.4447    34.5     4.3        20.6
...
2018 03 03    00 18 09.0 -33 33 42   8.2375  7.4249    32.9     4.2        20.6
2018 03 04    00 18 22.2 -33 30 53   8.2363  7.4216    32.7     4.1        20.6
2018 03 05    00 18 35.6 -33 28 06   8.2349  7.4184    32.6     4.1        20.6
...
2018 03 11    00 19 59.5 -33 12 34   8.2212  7.3987    32.1     4.1        20.6
...
2018 03 19    00 21 59.2 -32 54 59   8.1891  7.3728    32.9     4.2        20.6
...
2018 04 03    00 25 54.8 -32 32 59   8.0866  7.3249    38.0     4.8        20.6

Gareth V. Williams           (C) Copyright 2018 MPC           M.P.E.C. 2018-E17



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