• Processing (Info)

    • MPEC 2015-Y20 : COMET C/2015 X8 (NEOWISE)

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    M.P.E.C. 2015-Y20                                Issued 2015 Dec. 18, 15:11 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 X8 (NEOWISE)

Observations:
    CK15X080  S2015 12 14.63534 12 29 57.39 +32 42 48.0          16   TLEY020C51
    CK15X080  s2015 12 14.63534 1 - 5830.6777 -  881.7209 + 3509.3113   EY020C51
    CK15X080  S2015 12 14.76637 12 29 45.15 +32 53 44.0                LEY020C51
    CK15X080  s2015 12 14.76637 1 - 5793.3168 -  899.9663 + 3565.9140   EY020C51
    CK15X080  S2015 12 14.83195 12 29 39.20 +32 59 12.4                LEY020C51
    CK15X080  s2015 12 14.83195 1 - 5796.8028 -  906.0134 + 3558.7553   EY020C51
    CK15X080  S2015 12 14.96311 12 29 27.13 +33 10 12.4                LEY020C51
    CK15X080  s2015 12 14.96311 1 - 5803.7672 -  918.1268 + 3544.3582   EY020C51
    CK15X080  S2015 12 15.09414 12 29 14.97 +33 21 15.7                LEY020C51
    CK15X080  s2015 12 15.09414 1 - 5766.0093 -  936.0464 + 3600.6634   EY020C51
    CK15X080  S2015 12 15.09427 12 29 14.92 +33 21 16.7                LEY020C51
    CK15X080  s2015 12 15.09427 1 - 5810.6989 -  930.2677 + 3529.8962   EY020C51
    CK15X080 6C2015 12 18.21948 12 23 29.99 +38 02 29.7                vEY020I89
    CK15X080 6C2015 12 18.22070 12 23 29.83 +38 02 36.8                vEY020I89
    CK15X080 6C2015 12 18.22242 12 23 29.64 +38 02 46.7          15.9 TvEY020I89
    CK15X080 "C2015 12 18.44134 12 23 01.23 +38 23 44.4          19.2 TqEY020U69
    CK15X080 "C2015 12 18.44400 12 23 00.85 +38 23 58.8          19.3 TqEY020U69
    CK15X080 ,C2015 12 18.47164 12 22 57.18 +38 26 39.6          17.2 TqEY020U69
    CK15X080 ,C2015 12 18.47378 12 22 56.89 +38 26 52.1          17.2 TqEY020U69
    CK15X080 ]C2015 12 18.47568 12 22 56.52 +38 27 03.0          18.0 ToEY020695
    CK15X080 ]C2015 12 18.47695 12 22 56.38 +38 27 11.2          18.0 ToEY020695
    CK15X080 ,C2015 12 18.47697 12 22 56.50 +38 27 11.0          17.4 TqEY020U69
    CK15X080 ]C2015 12 18.47784 12 22 56.27 +38 27 16.2          18.0 ToEY020695
    CK15X080 ]C2015 12 18.47926 12 22 56.09 +38 27 24.5          18.0 ToEY020695
    CK15X080 ]C2015 12 18.48065 12 22 55.72 +38 27 31.2          18.1 ToEY020695

Observer details:
695 Kitt Peak.  Observers L. Lebofsky, M. Trueblood, R. Crawford.  Measurer
    R. Crawford.  2.3-m f/3.0 Ritchey-Chretien + CCD.
C51 WISE.  Measurers A. K. Mainzer, S. B. Fajardo-Acosta, J. D. Kirkpatrick,
    J. M. Bauer, T. Grav, J. R. Masiero, J. W. Dailey, R. M. Cutri,
    E. L. Wright, C. Nugent, S. Sonnett, E. Kramer.
I89 iTelescope Observatory, Nerpio.  Observer H. Sato.  0.43-m f/6.8
    astrograph + CCD.
U69 iTelescope SRO Observatory, Auberry.  Observers M. Suzuki, C. Jacques,
    E. Pimentel, J. Barros.  Measurers M. Suzuki, C. Jacques.  0.61-m f/6.5
    astrograph + CCD, 0.61-m f/6.5 reflector + CCD.

Orbital elements:
    C/2015 X8 (NEOWISE)
T 2015 Oct. 25.52355 TT                                 MPCW
q   1.2119000            (2000.0)            P               Q
                   Peri.   22.20427     -0.97362146     +0.21404348
                   Node   190.79329     +0.08625477     +0.66595740
e   1.0            Incl.  155.03596     +0.21123768     +0.71462307
From 18 observations 2015 Dec. 14-18.

Ephemeris:
    C/2015 X8 (NEOWISE)
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase   m1    m2
2015 11 18    12 43 25.5 +10 06 06   1.6380  1.2658    50.5    37.1  18.1
...
2015 12 03    12 40 14.5 +19 55 44   1.2995  1.3503    70.9    43.6  17.9
...
2015 12 11    12 34 30.1 +28 02 17   1.1218  1.4078    83.6    44.0  17.7
...
2015 12 17    12 25 57.9 +36 08 38   1.0029  1.4555    94.2    42.4  17.6
2015 12 18    12 23 57.9 +37 41 33   0.9851  1.4638    96.0    42.0  17.6
2015 12 19    12 21 44.6 +39 17 59   0.9680  1.4722    97.9    41.5  17.6
...
2015 12 25    12 01 44.8 +50 06 39   0.8845  1.5243   109.3    37.5  17.6
...
2016 01 02    10 54 39.4 +66 02 39   0.8402  1.5979   122.2    31.4  17.7
...
2016 01 17    04 39 51.7 +70 09 59   1.0006  1.7456   123.2    28.1  18.4

Gareth V. Williams           (C) Copyright 2015 MPC           M.P.E.C. 2015-Y20

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