[Iaude] MPEC H41: COMET P/2017 G2 (PANSTARRS)

mpec at si.edu mpec at si.edu
Fri Apr 21 10:47:43 EDT 2017


M.P.E.C. 2017-H41                                Issued 2017 Apr. 21, 14:42 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 G2 (PANSTARRS)
 
Observations:
    PK17G020  C2017 03 18.54589 13 09 19.632+67 53 26.14         20.5 TLEH041F51
    PK17G020  C2017 03 18.55753 13 09 18.770+67 53 26.71         20.6 TLEH041F51
    PK17G020  C2017 04 03.41036 12 50 00.315+67 22 10.53         20.4 TLEH041F51
    PK17G020  C2017 04 03.42330 12 49 59.333+67 22 06.36         20.2 TLEH041F51
    PK17G020  C2017 04 03.43628 12 49 58.334+67 22 02.36         20.4 TLEH041F51
    PK17G020  C2017 04 03.44924 12 49 57.307+67 21 58.23         20.3 TLEH041F51
    PK17G020  C2017 04 04.23291 12 49 00.33 +67 17 44.6          20.5 TqEH041I52
    PK17G020  C2017 04 04.24104 12 48 59.67 +67 17 41.7          20.3 TqEH041I52
    PK17G020  C2017 04 04.24944 12 48 58.99 +67 17 39.4          20.5 TqEH041I52
    PK17G020  C2017 04 04.25760 12 48 58.54 +67 17 37.5          20.5 TqEH041I52
    PK17G020 _C2017 04 04.28695812 48 56.710+67 17 26.29         20.5 TUEH041568
    PK17G020 _C2017 04 04.28794912 48 56.645+67 17 26.00         20.6 TUEH041568
    PK17G020 _C2017 04 04.28893812 48 56.567+67 17 25.72         20.4 TUEH041568
    PK17G020  C2017 04 05.22227 12 47 48.81 +67 12 04.0          20.2 TqEH041I52
    PK17G020  C2017 04 05.22970 12 47 48.35 +67 12 01.4          20.4 TqEH041I52
    PK17G020  C2017 04 05.23811 12 47 47.75 +67 11 58.0          20.3 TqEH041I52
    PK17G020  C2017 04 05.24680 12 47 47.09 +67 11 55.5          20.4 TqEH041I52
    PK17G020 KC2017 04 06.44916 12 46 20.89 +67 04 28.7          19.6 ToEH041291
    PK17G020 KC2017 04 06.46582 12 46 19.66 +67 04 21.9          19.7 ToEH041291
    PK17G020 KC2017 04 06.48613 12 46 18.18 +67 04 13.9          19.5 ToEH041291
    PK17G020  C2017 04 07.23497 12 45 26.36 +66 59 19.3          19.9 ToEH041926
    PK17G020  C2017 04 07.25561 12 45 24.81 +66 59 10.7          20.3 ToEH041926
    PK17G020  C2017 04 07.26959 12 45 23.71 +66 59 05.2          18.9 ToEH041926
    PK17G020 KC2017 04 07.84732 12 44 44.02 +66 55 05.5          20.2 TqEH041C10
    PK17G020 KC2017 04 07.88640 12 44 41.13 +66 54 49.8          20.6 TqEH041C10
    PK17G020 KC2017 04 07.92559 12 44 38.33 +66 54 33.8          20.4 TqEH041C10
    PK17G020  C2017 04 08.31203 12 44 11.64 +66 51 50.6          19.7 ToEH041926
    PK17G020  C2017 04 08.33233 12 44 10.19 +66 51 41.9          20.2 ToEH041926
    PK17G020  C2017 04 08.34713 12 44 09.08 +66 51 35.3          20.0 ToEH041926
    PK17G020 KC2017 04 08.87399 12 43 33.58 +66 47 44.2                UEH041J95
    PK17G020 KC2017 04 08.89468 12 43 32.29 +66 47 34.6          20.2 TUEH041J95
    PK17G020  C2017 04 09.33110 12 43 02.55 +66 44 21.3          20.0 ToEH041926
    PK17G020  C2017 04 09.33942 12 43 01.85 +66 44 17.1          20.2 ToEH041926
    PK17G020  C2017 04 09.34792 12 43 01.33 +66 44 13.5          20.5 ToEH041926
    PK17G020 ^C2017 04 14.35343 12 37 43.93 +66 01 36.1          19.0 ToEH041695
    PK17G020 ^C2017 04 14.36187 12 37 43.40 +66 01 31.2          19.4 ToEH041695
    PK17G020 ^C2017 04 14.37032 12 37 42.89 +66 01 26.6          19.2 ToEH041695
    PK17G020 KC2017 04 14.82652 12 37 16.50 +65 57 04.0          19.9 TqEH041A71
    PK17G020 KC2017 04 14.84114 12 37 15.58 +65 56 54.1          20.3 TqEH041A71
    PK17G020  C2017 04 15.21201 12 36 53.97 +65 53 21.5          19.7 ToEH041926
    PK17G020  C2017 04 15.23037 12 36 52.87 +65 53 10.5          19.7 ToEH041926
    PK17G020  C2017 04 15.24432 12 36 52.06 +65 53 02.7          19.6 ToEH041926
    PK17G020  C2017 04 15.38377 12 36 43.58 +65 51 40.0          19.4 ToEH041926
    PK17G020  C2017 04 15.39851 12 36 42.76 +65 51 31.1          19.6 ToEH041926
    PK17G020  C2017 04 15.41240 12 36 41.95 +65 51 22.7          19.6 ToEH041926
    PK17G020 KC2017 04 15.91639 12 36 13.67 +65 46 22.3          20.1 TqEH041I93
    PK17G020 KC2017 04 15.92607 12 36 13.09 +65 46 16.7          20.2 TqEH041I93
    PK17G020 KC2017 04 15.93633 12 36 12.44 +65 46 10.4          19.8 TqEH041I93
    PK17G020 |C2017 04 16.18829 12 35 58.45 +65 43 39.2                vEH041H06
    PK17G020 |C2017 04 16.19148 12 35 58.28 +65 43 36.7                vEH041H06
    PK17G020 |C2017 04 16.19467 12 35 58.14 +65 43 34.3          20.3 TvEH041H06
    PK17G020  C2017 04 16.21078 12 35 57.09 +65 43 25.4          20.0 ToEH041926
    PK17G020  C2017 04 16.22513 12 35 56.25 +65 43 16.9          19.6 ToEH041926
    PK17G020  C2017 04 16.23941 12 35 55.42 +65 43 08.3          19.7 ToEH041926
    PK17G020 KC2017 04 16.84308 12 35 22.14 +65 36 55.2          19.8 TqEH041C77
    PK17G020 KC2017 04 16.85949 12 35 21.16 +65 36 45.0          20.4 TqEH041C77
    PK17G020 KC2017 04 16.87659 12 35 20.20 +65 36 35.3          20.1 TqEH041C77
    PK17G020 KC2017 04 17.89762 12 34 25.34 +65 25 48.7          19.7 TUEH041958
    PK17G020 KC2017 04 17.90864 12 34 24.58 +65 25 42.6          19.6 TUEH041958
    PK17G020 KC2017 04 17.91966 12 34 24.00 +65 25 35.2          19.8 TUEH041958
    PK17G020 KC2017 04 19.43421 12 33 05.71 +65 08 56.1          19.8 ToEH041291
    PK17G020 KC2017 04 19.43998 12 33 05.42 +65 08 52.1          19.5 ToEH041291
    PK17G020 KC2017 04 19.44576 12 33 05.12 +65 08 47.8          19.6 ToEH041291
 
Observer details:
291 LPL/Spacewatch II.  Observers R. S. McMillan, M. T. Read.  1.8-m f/2.7
    reflector + CCD.
568 Mauna Kea.  Observers R. J. Wainscoat, R. Weryk, D. Woodworth.  Measurers
    M. Micheli, R. J. Wainscoat.  3.6-m Canada-France-Hawaii Telescope + CCD.
695 Kitt Peak.  Observer R. S. McMillan.  2.3-m f/9 reflector + CCD.
926 Tenagra II Observatory.  Observers M. Schwartz, P. R. Holvorcem.  Measurer
    M. Schwartz.  0.41-m f/3.75 astrograph + CCD, 0.81-m f/7 Ritchey-Chretien
    + CCD.
958 Observatoire de Dax.  Observers P. Dupouy, J. B. de Vanssay.  Measurer
    P. Dupouy.  0.43-m f/2.7 reflector + CCD.
A71 Stixendorf.  Observers M. Jaeger, E. Prosperi, S. Prosperi, W. Vollmann.
    Measurer M. Jaeger.  0.3-m f/4 reflector + CCD.
C10 Maisoncelles.  Observer J.-F. Soulier.  0.30-m f/3.8 Newtonian reflector
    + CCD.
C77 Bernezzo Observatory.  Observer A. Mantero.  0.25-m f/4 reflector + 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.
H06 iTelescope Observatory, Mayhill.  Observer H. Sato.  0.51-m f/6.8
    astrograph + CCD + f/4.5 focal reducer.
I52 Steward Observatory, Mt. Lemmon Station.  Observer E. J. Christensen.
    Measurers E. J. Christensen, D. C. Fuls, A. R. Gibbs, A. D. Grauer,
    J. A. Johnson, R. A. Kowalski, S. M. Larson, G. J. Leonard, R. G. Matheny,
    R. L. Seaman, F. C. Shelly.  1.0-m reflector + CCD.
I93 St Pardon de Conques.  Observer F. Losse.  0.40-m f/3.7 reflector + CCD.
J95 Great Shefford.  Observer P. Birtwhistle.  0.40-m f/6.0 Schmidt-Cassegrain
    + CCD.
 
Orbital elements:
    P/2017 G2 (PANSTARRS)
Epoch 2017 June 16.0 TT = JDT 2457920.5
T 2017 June 13.96391 TT                                 MPCW
q   2.8460042            (2000.0)            P               Q
n   0.04243081     Peri.  105.95692     -0.68297476     +0.01140442
a   8.1410769      Node    79.81688     -0.42750442     -0.81698187
e   0.6504143      Incl.   47.90563     +0.59227143     -0.57655057
P  23.23
>From 63 observations 2017 Mar. 18-Apr. 19, mean residual 0".4.

    P/2017 G2 (PANSTARRS)
Epoch 2040 Mar. 27.0 TT = JDT 2466240.5
T 2040 Mar. 21.79933 TT                                 MPCW
q   2.8366623            (2000.0)            P               Q
n   0.04254121     Peri.  104.85413     -0.68339931     -0.00289405
a   8.1269861      Node    79.74713     -0.41085101     -0.82507894
e   0.6509576      Incl.   47.89229     +0.60346237     -0.56501006
P  23.17
>From 63 observations 2017 Mar. 18-Apr. 19, mean residual 0".4.

    P/2017 G2 (PANSTARRS)
Epoch 2017 Feb. 16.0 TT = JDT 2457800.5
T 2017 June 13.94750 TT                                 MPCW
q   2.8460386            (2000.0)            P               Q
n   0.04245142     Peri.  105.94934     -0.68296885     +0.01137891
a   8.1384408      Node    79.82063     -0.42743583     -0.81703816
e   0.6502968      Incl.   47.90540     +0.59232775     -0.57647130
P  23.22
>From 63 observations 2017 Mar. 18-Apr. 19, mean residual 0".4.

Ephemeris:
    P/2017 G2 (PANSTARRS)
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase   m1    m2
2017 03 22    13 05 20.6 +67 55 13   2.4227  2.9280   110.8    18.6  19.6
...
2017 04 06    12 46 53.2 +67 07 19   2.4544  2.9017   106.5    19.3  19.6
...
2017 04 14    12 38 05.3 +66 04 54   2.4778  2.8897   104.0    19.7  19.6
...
2017 04 20    12 32 38.4 +65 02 30   2.4981  2.8816   102.1    19.9  19.6
2017 04 21    12 31 50.7 +64 50 53   2.5016  2.8803   101.8    20.0  19.6
2017 04 22    12 31 05.1 +64 38 56   2.5053  2.8791   101.5    20.0  19.6
...
2017 04 28    12 27 16.3 +63 20 29   2.5285  2.8720    99.5    20.2  19.6
...
2017 05 06    12 24 13.3 +61 19 38   2.5628  2.8640    96.9    20.5  19.6
...
2017 05 21    12 24 18.0 +56 52 53   2.6369  2.8528    91.7    20.8  19.7

Gareth V. Williams           (C) Copyright 2017 MPC           M.P.E.C. 2017-H41




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