MPEC 1997-R09 : 1997 QJ4

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M.P.E.C. 1997-R09                                Issued 1997 Sept. 7, 14:54 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.

             BMARSDEN@CFA.HARVARD.EDU or GWILLIAMS@CFA.HARVARD.EDU
                 URL http://cfa-www.harvard.edu/cfa/ps/mpc.html

                                   1997 QJ4

Observations:
     J97Q04J* C1997 08 28.50529 23 43 02.39 +01 11 43.2          22.5 R      568
     J97Q04J  C1997 08 28.55573 23 43 02.15 +01 11 42.2                      568
     J97Q04J  C1997 08 28.60615 23 43 01.87 +01 11 40.8                      568
     J97Q04J  C1997 08 29.46954 23 42 57.51 +01 11 19.0                      568
     J97Q04J  C1997 08 29.53183 23 42 57.21 +01 11 17.2                      568
     J97Q04J  C1997 09 01.38251 23 42 42.65 +01 10 03.9                      568
     J97Q04J  C1997 09 01.43666 23 42 42.34 +01 10 02.6                      568
     J97Q04J  C1997 09 01.48696 23 42 42.10 +01 10 01.2                      568

Observer details:
568 Mauna Kea.  Observers J. X. Luu, C. Trujillo, D. Jewitt, K. Berney.  2.2-m
    University of Hawaii reflector + CCD.

Orbital elements:
1997 QJ4
The following assumed 2:3 Neptune-resonance orbital elements keep the
object more than 13.2 AU from Neptune over a 14 000-year period.
Epoch 1997 Aug. 20.0 TT = JDT 2450680.5                 Williams
M 359.96711              (2000.0)            P               Q
n   0.00395812     Peri.    9.63821     +0.99642430     +0.05424414
a  39.5800793      Node   346.72458     -0.08306274     +0.76925287
e   0.1206588      Incl.   16.38524     +0.01546575     +0.63663773
P 249              H    7.5           G   0.15
From 8 observations 1997 Aug. 28-Sept. 1.

Ephemeris:
1997 QJ4                 a,e,i = 39.58, 0.12, 16                 q = 34.804
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
1997 08 30    23 42.91   +01 11.1   33.854   34.804   160.0     0.6    23.0
1997 09 09    23 42.04   +01 06.6   33.813   34.804   169.7     0.3    22.9
1997 09 19    23 41.14   +01 01.8   33.801   34.804   177.2     0.1    22.9
1997 09 29    23 40.25   +00 56.8   33.819   34.804   169.5     0.3    22.9
1997 10 09    23 39.39   +00 52.0   33.866   34.804   159.6     0.6    23.0
1997 10 19    23 38.60   +00 47.4   33.942   34.804   149.6     0.8    23.0
1997 10 29    23 37.91   +00 43.3   34.043   34.804   139.5     1.1    23.0
1997 11 08    23 37.35   +00 39.9   34.168   34.804   129.4     1.3    23.1
1997 11 18    23 36.94   +00 37.4   34.312   34.804   119.2     1.4    23.1
1997 11 28    23 36.69   +00 35.9   34.470   34.805   109.0     1.5    23.1
1997 12 08    23 36.62   +00 35.5   34.639   34.805    98.9     1.6    23.1
1997 12 18    23 36.74   +00 36.2   34.812   34.805    88.8     1.6    23.1
1997 12 28    23 37.04   +00 38.1   34.984   34.805    78.7     1.6    23.1
1998 01 07    23 37.51   +00 41.2   35.151   34.805    68.6     1.5    23.1
1998 01 17    23 38.15   +00 45.4   35.307   34.805    58.6     1.4    23.1
1998 01 27    23 38.93   +00 50.7   35.447   34.805    48.7     1.2    23.1
1998 02 06    23 39.84   +00 56.9   35.568   34.805    38.8     1.0    23.1

Gareth V. Williams           (C) Copyright 1997 MPC           M.P.E.C. 1997-R09

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