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MPEC 1997-W03 : 1997 US2

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M.P.E.C. 1997-W03                                Issued 1997 Nov. 22, 17:13 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/iau/mpc.html

                                   1997 US2

                           Revision to MPEC 1997-V22

Observations:
     J97U02S  C1997 11 09.30965 02 41 42.59 +11 47 17.3          18.7 R      696
     J97U02S  C1997 11 09.31029 02 41 42.47 +11 47 16.6          18.7 R      696
     J97U02S  C1997 11 09.31093 02 41 42.33 +11 47 16.2          18.7 R      696
     J97U02S  C1997 11 18.88734 02 05 14.85 +09 13 58.4                      587
     J97U02S  C1997 11 18.89028 02 05 14.03 +09 13 54.9                      587
     J97U02S  C1997 11 21.94310 01 51 22.81 +08 14 00.2          17.8 V      046
     J97U02S  C1997 11 21.94426 01 51 22.58 +08 13 58.7                      046
     J97U02S  C1997 11 21.94547 01 51 22.24 +08 13 56.6                      046
     J97U02S  C1997 11 21.94713 01 51 21.72 +08 13 54.2                      046

Observer details:
046 Klet.  Observers J. Ticha, M. Tichy  Measurer M. Tichy.
    0.57-m f/5.2 reflector + CCD.
587 Sormano.  Observers P. Sicoli, F. Manca.  0.5-m reflector + CCD.
696 Whipple Observatory, Mt. Hopkins.  Observer C. W. Hergenrother.
    1.2-m reflector + CCD.

Orbital elements:
1997 US2
Epoch 1997 Oct. 19.0 TT = JDT 2450740.5                 Marsden
M 310.31103              (2000.0)            P               Q
n   0.45516782     Peri.   99.78175     -0.96956008     -0.23954905
a   1.6737414      Node    66.37240     +0.19731971     -0.88698802
e   0.6618361      Incl.    3.17170     +0.14497648     -0.39480186
P   2.17           H   19.5           G   0.15
From 67 observations 1997 Oct. 23-Nov. 21.

Ephemeris:
1997 US2                 a,e,i = 1.67, 0.66, 3                   q = 0.5660
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
1997 11 18    02 09.08   +09 30.7    0.366    1.334   157.4    16.5    18.8
1997 11 23    01 46.38   +07 52.4    0.335    1.281   146.6    25.1    18.8
1997 11 28    01 21.30   +06 01.5    0.310    1.226   135.2    34.6    18.8
1997 12 03    00 54.48   +04 01.5    0.291    1.171   123.2    44.8    18.9
1997 12 08    00 26.54   +01 56.3    0.277    1.114   110.9    55.7    19.0
1997 12 13    23 57.82   -00 11.0    0.266    1.057    98.4    67.2    19.1
1997 12 18    23 28.29   -02 19.4    0.259    0.998    85.7    79.3    19.3
1997 12 23    22 57.58   -04 29.4    0.255    0.940    72.7    92.3    19.7
1997 12 28    22 25.18   -06 42.5    0.254    0.881    59.3   106.3    20.2
1998 01 02    21 50.73   -08 59.2    0.258    0.823    45.5   121.6    21.1
1998 01 07    21 14.62   -11 15.9    0.269    0.767    31.4   138.1    22.7

Brian G. Marsden             (C) Copyright 1997 MPC           M.P.E.C. 1997-W03

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