[Iaude] MPEC G57: COMET P/2017 G1 (PANSTARRS)

Thu Apr 6 11:57:30 EDT 2017

M.P.E.C. 2017-G57                                Issued 2017 Apr. 6, 15:46 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 http://www.minorplanetcenter.net/    ISSN 1523-6714


                          COMET P/2017 G1 (PANSTARRS)
 
Observations:
    PK17G010  C2017 03 25.42796 12 46 15.600-09 48 50.25         21.4 TLEG057F51
    PK17G010  C2017 03 25.44006 12 46 15.144-09 48 47.59         22.0 TLEG057F51
    PK17G010  C2017 03 25.45218 12 46 14.687-09 48 44.60         22.7 TLEG057F51
    PK17G010  C2017 03 25.46431 12 46 14.270-09 48 41.31         21.5 TLEG057F51
    PK17G010  C2017 04 01.45654 12 42 06.851-09 20 44.16         22.0 TLEG057F51
    PK17G010  C2017 04 01.46683 12 42 06.516-09 20 41.56         21.8 TLEG057F51
    PK17G010  C2017 04 01.47712 12 42 06.134-09 20 39.13         21.8 TLEG057F51
    PK17G010 KC2017 04 02.16140712 41 42.17 -09 17 48.0          21.6 TUEG057W86
    PK17G010 KC2017 04 02.16927312 41 41.89 -09 17 46.1          21.5 TUEG057W86
    PK17G010 KC2017 04 02.17320712 41 41.76 -09 17 45.2          21.5 TUEG057W86
    PK17G010 _C2017 04 02.32415612 41 36.552-09 17 10.43         21.7 TUEG057568
    PK17G010 _C2017 04 02.32536912 41 36.496-09 17 10.14         21.5 TUEG057568
    PK17G010 _C2017 04 02.32658712 41 36.469-09 17 09.79         21.6 TUEG057568
    PK17G010 KC2017 04 02.39955 12 41 33.69 -09 16 52.0                oEG057691
    PK17G010 KC2017 04 02.41076 12 41 33.29 -09 16 49.2                oEG057691
    PK17G010 KC2017 04 02.42197 12 41 32.91 -09 16 46.5                oEG057691
    PK17G010 |C2017 04 04.21786 12 40 30.43 -09 09 18.1          21.7 TuEG057807
    PK17G010 |C2017 04 04.22481 12 40 30.17 -09 09 16.4          21.5 TuEG057807
    PK17G010 |C2017 04 04.23175 12 40 29.91 -09 09 15.0          21.7 TuEG057807
    PK17G010 KC2017 04 05.25590 12 39 54.65 -09 05 03.9          20.9 ToEG057291
    PK17G010 KC2017 04 05.26518 12 39 54.36 -09 05 01.3          20.8 ToEG057291
    PK17G010 KC2017 04 05.27448 12 39 54.04 -09 04 58.8          20.3 ToEG057291
 
Observer details:
291 LPL/Spacewatch II.  Observer R. S. McMillan.  1.8-m f/2.7 reflector + CCD.
568 Mauna Kea.  Observers R. J. Wainscoat, D. Woodworth.  Measurers M. Micheli,
    R. J. Wainscoat.  3.6-m Canada-France-Hawaii Telescope + CCD.
691 Steward Observatory, Kitt Peak.  Observer J. V. Scotti.  0.9-m f/3
    reflector + CCD.
807 Cerro Tololo.  Observers T. Linder, R. Holmes.  0.61-m f/6.5 astrograph
    + CCD.
F51 Pan-STARRS 1, Haleakala.  Observers B. Gibson, T. Goggia, S. Kahale,
    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.
W86 Cerro Tololo-LCOGT B.  Observers T. Lister, S. Greenstreet, E. Gomez.
    Measurer T. Lister.  1.0-m f/8 Ritchey-Chretien + CCD.
 
Orbital elements:
    P/2017 G1 (PANSTARRS)
Epoch 2016 May 12.0 TT = JDT 2457520.5
T 2016 May 11.95917 TT                                  MPCW
q   2.6196929            (2000.0)            P               Q
n   0.04612082     Peri.  218.15856     -0.46144734     -0.88509075
a   7.7008392      Node   259.39679     +0.82837719     -0.40537984
e   0.6598172      Incl.    3.53871     +0.31758083     -0.22865159
P  21.37
>From 22 observations 2017 Mar. 25-Apr. 5, mean residual 0".2.

    P/2017 G1 (PANSTARRS)
Epoch 2035 Dec. 19.0 TT = JDT 2464680.5
T 2035 Dec. 17.50474 TT                                 MPCW
q   2.4786313            (2000.0)            P               Q
n   0.05183725     Peri.  228.07566     -0.41970295     -0.90418408
a   7.1237406      Node   246.90143     +0.85621652     -0.36537452
e   0.6520604      Incl.    4.95046     +0.30123530     -0.22125238
P  19.01
>From 22 observations 2017 Mar. 25-Apr. 5, mean residual 0".2.

    P/2017 G1 (PANSTARRS)
Epoch 2017 Feb. 16.0 TT = JDT 2457800.5
T 2016 May 12.16462 TT                                  MPCW
q   2.6197284            (2000.0)            P               Q
n   0.04585844     Peri.  218.28814     -0.46200119     -0.88480290
a   7.7301846      Node   259.30321     +0.82815223     -0.40592621
e   0.6611040      Incl.    3.53884     +0.31736223     -0.22879628
P  21.49
>From 22 observations 2017 Mar. 25-Apr. 5, mean residual 0".2.

Ephemeris:
    P/2017 G1 (PANSTARRS)
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase   m1    m2
2017 03 07    12 56 09.6 -10 48 15   2.7051  3.5921   149.0     8.2  21.2
...
2017 03 22    12 48 15.6 -10 01 44   2.6966  3.6701   165.6     3.9  21.3
...
2017 03 30    12 43 33.7 -09 30 43   2.7179  3.7121   173.7     1.7  21.4
...
2017 04 05    12 40 03.5 -09 06 05   2.7462  3.7438   175.0     1.3  21.4
2017 04 06    12 39 29.2 -09 01 57   2.7520  3.7491   174.4     1.5  21.4
2017 04 07    12 38 55.1 -08 57 48   2.7580  3.7544   173.6     1.7  21.4
...
2017 04 13    12 35 38.8 -08 33 05   2.8004  3.7862   167.8     3.2  21.5
...
2017 04 21    12 31 45.3 -08 01 35   2.8728  3.8288   159.2     5.3  21.6
...
2017 05 06    12 26 30.3 -07 12 08   3.0535  3.9092   143.3     8.9  21.8

Gareth V. Williams           (C) Copyright 2017 MPC           M.P.E.C. 2017-G57