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MPEC 2011-R24 : COMET P/2011 R2 (PANSTARRS)

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M.P.E.C. 2011-R24                                Issued 2011 Sept. 7, 02:01 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 P/2011 R2 (PANSTARRS)

Observations:
    PK11R020  C2011 09 04.50500 23 31 05.155-06 30 28.44         18.7 TLER024F51
    PK11R020  C2011 09 04.51641 23 31 04.798-06 30 33.36         18.6 TLER024F51
    PK11R020  C2011 09 05.81286 23 30 27.49 -06 39 57.3          17.5 TrER024B18
    PK11R020  C2011 09 05.81425 23 30 27.46 -06 39 58.5          17.4 TrER024B18
    PK11R020  C2011 09 05.81566 23 30 27.41 -06 39 59.2          17.5 TrER024B18
    PK11R020  C2011 09 05.81985 23 30 27.27 -06 40 01.4          17.4 TrER024B18
    PK11R020 KC2011 09 06.02387 23 30 20.91 -06 41 30.0                tER024204
    PK11R020 KC2011 09 06.02968 23 30 20.71 -06 41 32.4          17.9 TtER024204
    PK11R020 |C2011 09 06.12111 23 30 18.33 -06 42 02.7          18.5 ToER024807
    PK11R020 |C2011 09 06.12477 23 30 18.22 -06 42 04.4          18.7 ToER024807
    PK11R020 |C2011 09 06.12817 23 30 18.11 -06 42 05.9          18.6 ToER024807
    PK11R020 |C2011 09 06.13134 23 30 18.02 -06 42 07.1          18.6 ToER024807
    PK11R020 KC2011 09 06.27727523 30 13.38 -06 43 19.7          18.3 TtER024H21
    PK11R020 KC2011 09 06.27952123 30 13.32 -06 43 20.7          17.9 TtER024H21
    PK11R020 KC2011 09 06.28176423 30 13.23 -06 43 21.5          18.5 TtER024H21
    PK11R020 KC2011 09 06.28400623 30 13.17 -06 43 22.4          18.0 TtER024H21
    PK11R020 KC2011 09 06.28624923 30 13.08 -06 43 23.7          18.2 TtER024H21
    PK11R020 KC2011 09 06.28808823 30 13.03 -06 43 24.5          18.4 TtER024H21
    PK11R020 KC2011 09 06.28983023 30 12.99 -06 43 25.0          18.5 TtER024H21
    PK11R020 %C2011 09 06.29475 23 30 12.93 -06 43 26.5          17.7 TrER024H06
    PK11R020 %C2011 09 06.30188 23 30 12.70 -06 43 29.8          17.8 TrER024H06
    PK11R020 %C2011 09 06.30901 23 30 12.39 -06 43 33.9          17.8 TrER024H06
    PK11R020 *C2011 09 06.40076 23 30 09.47 -06 44 12.7          17.3 TuER024H06
    PK11R020 *C2011 09 06.40674 23 30 09.28 -06 44 15.3          17.2 TuER024H06
    PK11R020 *C2011 09 06.41271 23 30 09.08 -06 44 17.8          17.2 TuER024H06
    PK11R020  C2011 09 06.48764 23 30 07.41 -06 44 43.2          17.9 ToER024E10
    PK11R020  C2011 09 06.48862 23 30 07.40 -06 44 42.6          18.1 ToER024E10
    PK11R020  C2011 09 06.48912 23 30 07.35 -06 44 42.9          17.6 ToER024E10
    PK11R020  C2011 09 06.49061 23 30 07.31 -06 44 43.1          17.5 ToER024E10
    PK11R020 `C2011 09 06.59283 23 30 04.07 -06 45 28.2          17.4 TuER024D90
    PK11R020  C2011 09 06.59824 23 30 03.90 -06 45 39.3          18.3 ToER024300
    PK11R020  C2011 09 06.60062 23 30 03.88 -06 45 40.0          18.3 ToER024300
    PK11R020  C2011 09 06.60539 23 30 03.72 -06 45 41.8          18.1 ToER024300
    PK11R020 `C2011 09 06.60650 23 30 03.62 -06 45 34.1          17.4 TuER024D90
    PK11R020 KC2011 09 06.90992 23 29 54.59 -06 47 55.9          17.9 TvER024470
    PK11R020 KC2011 09 06.91358 23 29 54.46 -06 47 57.5          17.8 TvER024470
    PK11R020 KC2011 09 06.91723 23 29 54.33 -06 47 59.1          17.9 TvER024470
    PK11R020 KC2011 09 06.92121 23 29 54.22 -06 48 01.9                uER024J95
    PK11R020 KC2011 09 06.92514 23 29 54.12 -06 48 03.7                uER024J95
    PK11R020 KC2011 09 06.92848 23 29 54.01 -06 48 04.9                uER024J95
    PK11R020 KC2011 09 06.93322 23 29 53.86 -06 48 07.6          17.4 TuER024J95
    PK11R020 KC2011 09 07.04464 23 29 50.28 -06 48 55.9                uER024J95
    PK11R020 KC2011 09 07.05185 23 29 50.05 -06 48 59.0          17.5 TuER024J95

Observer details:
204 Schiaparelli Observatory.  Observer L. Buzzi.  0.38-m f/6.8 reflector
    + CCD.
300 Bisei Spaceguard Center--BATTeRS.  Observers K. Nishiyama, N. Hashimoto.
    1.0-m f/3.0 reflector + CCD.
470 Ceccano.  Observers G. Masi, U. Masi, G. Luccone.  Measurers G. Masi,
    G. Luccone.  0.43-m f/6.8 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.
B18 Terskol.  Observers M. Andreev, A. Sergeev, N. Parakhin, V. Kozlov.
    Measurer M. Andreev.  0.6-m f/12.8 Cassegrain + CCD.
D90 RAS Observatory, Moorook.  Observer K. Hills.  0.41-m f/9 Ritchey-Chretien
    + CCD.
E10 Siding Spring-Faulkes Telescope South.  Observers N. Howes, G. Sostero,
    E. Guido.  2.0-m f/10.0 Ritchey-Chretien + CCD.
F51 Pan-STARRS 1, Haleakala.  Observers N. Primak, A. Schultz, S. Watters,
    J. Thiel, T. Goggia.  Measurer PS1 Science Consortium.  1.8-m
    Ritchey-Chretien + CCD.
H06 RAS Observatory, Mayhill.  Observers E. Guido, G. Sostero, N. Howes,
    R. Ligustri.  0.25-m f/3.4 reflector + CCD, 0.50-m f/4.5 reflector + CCD.
H21 Astronomical Research Observatory, Westfield.  Observer R. Holmes.
    Measurers T. Vorobjov, S. Foglia, L. Buzzi.  0.61-m f/4.0 astrograph + CCD,
    0.81-m f/4.0 astrograph + CCD.
J95 Great Shefford.  Observer P. Birtwhistle.  0.40-m f/6.0 Schmidt-Cassegrain
    + CCD.

Orbital elements:
    P/2011 R2 (PANSTARRS)
T 2011 Nov. 19.50946 TT                                 MPC
q   2.0165176            (2000.0)            P               Q
n   0.15837895     Peri.  230.12353     +0.95702388     -0.28634175
a   3.3832785      Node   146.44212     +0.28494303     +0.89891325
e   0.4039753      Incl.    4.77083     +0.05396994     +0.33160726
P   6.22
From 43 observations 2011 Sept. 4-7.

Ephemeris:
    P/2011 R2 (PANSTARRS)
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase   m1    m2
2011 08 08    23 36 56.9 -04 00 26   1.2738  2.1638   141.8    16.8  18.4
...
2011 08 23    23 35 48.2 -05 07 44   1.1586  2.1261   156.9    10.8  18.1
...
2011 08 31    23 33 06.2 -05 58 43   1.1155  2.1079   165.4     6.9  18.0
...
2011 09 06    23 30 21.7 -06 41 13   1.0926  2.0953   171.7     4.0  17.9
2011 09 07    23 29 51.7 -06 48 29   1.0896  2.0932   172.7     3.5  17.9
2011 09 08    23 29 21.1 -06 55 48   1.0868  2.0912   173.7     3.0  17.9
...
2011 09 14    23 26 09.2 -07 39 41   1.0749  2.0797   176.0     1.9  17.8
...
2011 09 22    23 21 50.1 -08 35 29   1.0720  2.0657   168.6     5.5  17.8
...
2011 10 07    23 15 34.7 -09 55 39   1.1054  2.0440   152.3    13.1  17.8

Gareth V. Williams           (C) Copyright 2011 MPC           M.P.E.C. 2011-R24

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