• Processing (Info)

    • MPEC 2015-Y59 : COMET C/2015 YG1 (NEOWISE)

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    M.P.E.C. 2015-Y59                                Issued 2015 Dec. 20, 17:08 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@CFA.HARVARD.EDU
            URL https://www.minorplanetcenter.net/    ISSN 1523-6714

                          COMET C/2015 YG1 (NEOWISE)

Observations:
    CK15Y01G  S2015 12 17.91253 12 59 13.46 +37 15 12.5          19   TLEY059C51
    CK15Y01G  s2015 12 17.91253 1 - 5355.4143 - 1240.2664 + 4105.8367   EY059C51
    CK15Y01G  S2015 12 17.91265 12 59 13.32 +37 15 11.5                LEY059C51
    CK15Y01G  s2015 12 17.91265 1 - 5406.4658 - 1238.0481 + 4039.2982   EY059C51
    CK15Y01G  S2015 12 18.04369 12 59 14.70 +37 14 19.1                LEY059C51
    CK15Y01G  s2015 12 18.04369 1 - 5364.0500 - 1252.1164 + 4091.0207   EY059C51
    CK15Y01G  S2015 12 18.17484 12 59 16.32 +37 13 24.8                LEY059C51
    CK15Y01G  s2015 12 18.17484 1 - 5372.6193 - 1264.0033 + 4076.1747   EY059C51
    CK15Y01G  S2015 12 18.30600 12 59 17.42 +37 12 29.7                LEY059C51
    CK15Y01G  s2015 12 18.30600 1 - 5381.1835 - 1275.9243 + 4061.2184   EY059C51
    CK15Y01G  S2015 12 18.37158 12 59 18.28 +37 12 03.4                LEY059C51
    CK15Y01G  s2015 12 18.37158 1 - 5385.4685 - 1281.8982 + 4053.6990   EY059C51
    CK15Y01G  C2015 12 19.40893212 59 27.54 +37 05 08.1          17.7 TtEY059H01
    CK15Y01G  C2015 12 19.41398712 59 27.58 +37 05 06.4          17.6 TtEY059H01
    CK15Y01G  C2015 12 19.42562212 59 27.66 +37 05 02.0          17.5 TtEY059H01
    CK15Y01G  C2015 12 19.43374112 59 27.72 +37 04 58.8          17.6 TtEY059H01
    CK15Y01G  C2015 12 19.51207 12 59 28.20 +37 04 30.2          16.8 ToEY059926
    CK15Y01G  C2015 12 19.52591 12 59 28.31 +37 04 24.7          16.9 ToEY059926
    CK15Y01G  C2015 12 19.53977 12 59 28.39 +37 04 19.0          16.9 ToEY059926
    CK15Y01G  C2015 12 19.69907 12 59 29.66 +37 03 14.7          17.9 TqEY059900
    CK15Y01G  C2015 12 19.70642 12 59 29.74 +37 03 11.8          17.8 TqEY059900
    CK15Y01G  C2015 12 19.71377 12 59 29.79 +37 03 08.8          18.1 TqEY059900
    CK15Y01G  C2015 12 19.78677 12 59 30.25 +37 02 42.0          17.3 ToEY059300
    CK15Y01G  C2015 12 19.78838 12 59 30.28 +37 02 41.0          17.3 ToEY059300
    CK15Y01G  C2015 12 19.78999 12 59 30.28 +37 02 40.9          17.2 ToEY059300
    CK15Y01G  C2015 12 19.79160 12 59 30.29 +37 02 39.5          17.3 ToEY059300

Observer details:
300 Bisei Spaceguard Center--BATTeRS.  Observers S. Okumura, T. Fujiwara.
    1.0-m f/3.0 reflector + CCD.
900 Moriyama.  Observer Y. Ikari.  0.26-m f/7.0 reflector + CCD.
926 Tenagra II Observatory.  Observers M. Schwartz, P. R. Holvorcem.  Measurer
    M. Schwartz.  0.81-m f/7 Ritchey-Chretien + CCD.
C51 WISE.  Measurers A. K. Mainzer, J. M. Bauer, T. Grav, J. R. Masiero,
    J. W. Dailey, R. M. Cutri, E. L. Wright, C. Nugent, S. Sonnett, E. Kramer.
H01 Magdalena Ridge Observatory, Socorro.  Observers W. H. Ryan, E. V. Ryan.
    Measurer W. H. Ryan.  2.4-m f/8.9 reflector + CCD.

Orbital elements:
    C/2015 YG1 (NEOWISE)
T 2015 Sept. 19.08855 TT                                MPCW
q   1.7025700            (2000.0)            P               Q
                   Peri.   84.98178     +0.16057556     -0.98256101
                   Node   353.13988     +0.24167222     +0.13123202
e   1.0            Incl.   51.71037     +0.95697964     +0.13172710
From 20 observations 2015 Dec. 17-19.

Ephemeris:
    C/2015 YG1 (NEOWISE)
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase   m1    m2
2015 11 20    12 40 30.3 +42 03 34   1.8981  1.8849    74.1    30.3  17.1
...
2015 12 05    12 53 52.0 +39 03 58   1.8642  1.9747    81.4    29.6  17.3
...
2015 12 13    12 57 53.0 +37 51 47   1.8378  2.0278    86.3    29.0  17.4
...
2015 12 19    12 59 24.0 +37 07 52   1.8151  2.0697    90.3    28.4  17.5
2015 12 20    12 59 31.4 +37 01 20   1.8111  2.0768    91.0    28.3  17.5
2015 12 21    12 59 36.5 +36 55 02   1.8071  2.0840    91.8    28.2  17.5
...
2015 12 27    12 59 18.8 +36 21 39   1.7821  2.1280    96.3    27.3  17.5
...
2016 01 04    12 56 39.6 +35 47 47   1.7478  2.1889   102.9    26.0  17.6
...
2016 01 19    12 44 08.8 +35 06 32   1.6896  2.3087   117.0    22.3  17.8

Gareth V. Williams           (C) Copyright 2015 MPC           M.P.E.C. 2015-Y59

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