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MPEC 2011-S28 : COMET C/2011 S1 (GIBBS)

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Read MPEC 2011-S27 Read MPEC 2011-S29 

M.P.E.C. 2011-S28                                Issued 2011 Sept. 21, 18:56 UT

     The Minor Planet Electronic Circulars contain information on unusual
         minor planets and routine data on comets.  They are published
   on behalf of Commission 20 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@CFA.HARVARD.EDU
            URL http://www.minorplanetcenter.net/    ISSN 1523-6714

                            COMET C/2011 S1 (GIBBS)

Observations:
    CK11S010  C2011 09 18.27457 23 26 06.43 -01 12 22.3          21.2 TrES028G96
    CK11S010  C2011 09 18.28154 23 26 06.21 -01 12 22.7          20.3 TrES028G96
    CK11S010  C2011 09 18.28852 23 26 06.14 -01 12 23.6          21.2 TrES028G96
    CK11S010  C2011 09 18.29549 23 26 05.92 -01 12 24.3          20.3 TrES028G96
    CK11S010  C2011 09 18.33898 23 26 05.02 -01 12 30.9          20.4 TrES028G96
    CK11S010  C2011 09 18.35365 23 26 04.74 -01 12 32.3          21.3 TrES028G96
    CK11S010  C2011 09 18.36098 23 26 04.63 -01 12 33.0          20.7 TrES028G96
    CK11S010  C2011 09 19.36174 23 25 44.50 -01 14 50.9          20.5 TrES028G96
    CK11S010  C2011 09 19.36979 23 25 44.32 -01 14 52.4          19.9 TrES028G96
    CK11S010  C2011 09 19.37803 23 25 44.14 -01 14 54.1          20.3 TrES028G96
    CK11S010  C2011 09 19.38629 23 25 43.93 -01 14 55.3          20.0 TrES028G96
    CK11S010 |C2011 09 20.24810 23 25 26.74 -01 16 51.7          21.9 ToES028807
    CK11S010 |C2011 09 20.25721 23 25 26.55 -01 16 53.0          21.4 ToES028807
    CK11S010  C2011 09 20.32308 23 25 25.16 -01 17 04.0          21.1 ToES028291
    CK11S010  C2011 09 20.33277 23 25 25.04 -01 17 05.2          21.4 ToES028291
    CK11S010  C2011 09 20.34000 23 25 24.83 -01 17 06.5          21.2 ToES028291
    CK11S010 7C2011 09 20.49263 23 25 21.79 -01 17 27.4          21.6 TrES028F65
    CK11S010 7C2011 09 20.49459 23 25 21.75 -01 17 27.7          21.5 TrES028F65
    CK11S010 7C2011 09 20.49655 23 25 21.77 -01 17 28.1          21.6 TrES028F65
    CK11S010 KC2011 09 21.57815 23 25 00.15 -01 19 57.2          21.2 ToES028E10
    CK11S010 KC2011 09 21.57912 23 25 00.14 -01 19 56.6          21.5 ToES028E10
    CK11S010 KC2011 09 21.58010 23 25 00.12 -01 19 56.8          21.4 ToES028E10

Observer details:
291 LPL/Spacewatch II.  Observer J. V. Scotti.  1.8-m f/2.7 reflector + CCD.
807 Cerro Tololo.  Observers R. Holmes, T. Linder, V. Hoette.  Measurers
    R. Holmes, T. Linder.  0.41-m f/11 Ritchey-Chretien + CCD.
E10 Siding Spring-Faulkes Telescope South.  Observers G. Sostero, N. Howes,
    E. Guido.  2.0-m f/10.0 Ritchey-Chretien + CCD.
F65 Haleakala-Faulkes Telescope North.  Observers P. Miller, P. Roche,
    A. Tripp, R. Miles, R. Holmes, L. Buzzi, S. Fogl.  Measurers L. Buzzi,
    S. Foglia.  2.0-m f/10.0 Ritchey-Chretien + CCD.
G96 Mt. Lemmon Survey.  Observers A. R. Gibbs, S. F. Tornero.  Measurers
    J. D. Ahern, E. C. Beshore, A. Boattini, G. J. Garradd, A. R. Gibbs,
    A. D. Grauer, R. E. Hill, R. A. Kowalski, S. M. Larson, R. H. McNaught.
    1.5-m reflector + CCD.

Orbital elements:
    C/2011 S1 (Gibbs)
T 2013 Jan. 16.53738 TT                                 MPC
q   4.9878456            (2000.0)            P               Q
                   Peri.  174.64609     +0.71235679     -0.70118411
                   Node   229.92249     +0.64245035     +0.66860713
e   1.0            Incl.    2.23274     +0.28249840     +0.24759919
From 22 observations 2011 Sept. 18-21.

Ephemeris:
    C/2011 S1 (Gibbs)
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase   m1    m2
2011 08 22    23 34 34.1 -00 17 05   5.3851  6.3118   154.3     4.0  21.2
...
2011 09 06    23 30 10.3 -00 45 05   5.2509  6.2457   169.8     1.6  21.1
...
2011 09 14    23 27 32.3 -01 02 36   5.2058  6.2109   177.3     0.4  21.0
...
2011 09 20    23 25 31.7 -01 16 19   5.1843  6.1850   174.6     0.9  21.0
2011 09 21    23 25 11.7 -01 18 37   5.1818  6.1807   173.6     1.0  21.0
2011 09 22    23 24 51.8 -01 20 55   5.1796  6.1764   172.6     1.2  21.0
...
2011 09 28    23 22 54.3 -01 34 41   5.1724  6.1508   166.3     2.2  21.0
...
2011 10 06    23 20 28.1 -01 52 21   5.1790  6.1168   157.8     3.5  20.9
...
2011 10 21    23 16 49.9 -02 20 43   5.2380  6.0540   142.0     5.8  20.9

Gareth V. Williams           (C) Copyright 2011 MPC           M.P.E.C. 2011-S28

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