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MPEC 1998-O25 : 1998 OS4

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Read MPEC 1998-O24 Read MPEC 1998-O26 

M.P.E.C. 1998-O25                                Issued 1998 July 30, 15:28 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

                                   1998 OS4

Observations:
     J98O04S* C1998 07 26.32244 22 00 49.94 -03 11 04.5          18.6 R      699
     J98O04S  C1998 07 26.33416 22 00 50.04 -03 10 43.5                      699
     J98O04S  C1998 07 26.34657 22 00 50.09 -03 10 21.3                      699
     J98O04S  C1998 07 26.93991 22 00 56.22 -02 52 31.3          18.8 V      046
     J98O04S  C1998 07 26.94105 22 00 56.20 -02 52 28.9                      046
     J98O04S  C1998 07 26.94333 22 00 56.16 -02 52 25.7                      046
     J98O04S  C1998 07 26.94446 22 00 56.16 -02 52 23.2          18.9 V      046
     J98O04S  C1998 07 26.94560 22 00 56.25 -02 52 22.5                      046
     J98O04S  C1998 07 26.94681 22 00 56.22 -02 52 18.5                      046
     J98O04S  C1998 07 27.03900 22 00 56.60 -02 49 31.9                      557
     J98O04S  C1998 07 27.04133 22 00 56.59 -02 49 28.5          18.8 V      557
     J98O04S  C1998 07 27.42516 22 00 59.85 -02 37 52.3                      673
     J98O04S  C1998 07 27.43079 22 00 59.83 -02 37 41.4                      673
     J98O04S  C1998 07 29.89375 22 01 15.20 -01 23 28.4                      106
     J98O04S  C1998 07 29.90542 22 01 15.14 -01 23 07.8                      106
     J98O04S  C1998 07 29.91463 22 01 15.17 -01 22 50.8                      106
     J98O04S  C1998 07 29.92786 22 01 15.14 -01 22 27.2                      106
     J98O04S  C1998 07 29.92882 22 01 15.24 -01 22 24.8          18.5 V      104
     J98O04S  C1998 07 29.93252 22 01 15.25 -01 22 17.8                      104
     J98O04S  C1998 07 29.93611 22 01 15.25 -01 22 11.7                      104
     J98O04S  C1998 07 29.93970 22 01 15.27 -01 22 05.7                      104

Observer details:
046 Klet.  Observers J. Ticha, M. Tichy.  Measurer M. Tichy.  0.57-m f/5.2
    reflector + CCD.
104 San Marcello Pistoiese.  Observers L. Tesi, A. Boattini.  Measurers
    A. Boattini, G. Forti, L. Tesi.  0.40-m f/5 reflector + CCD.
106 Crni Vrh.  Observers J. Skvarc, H. Mikuz.  0.36-m f/6.7 Schmidt-Cassegrain
    + CCD.
557 Ondrejov.  Observer P. Pravec.  0.65-m f/3.6 reflector + CCD.
673 Table Mountain Observatory, Wrightwood.  Observers D. L. Rabinowitz,
    M. L. Hicks, G. Genevier.  0.6-m reflector + CCD.
699 Lowell Observatory-LONEOS.  Observer B. W. Koehn.  Measurers B. W. Koehn,
    E. Bowell.  0.59-m LONEOS Schmidt + CCD.

Orbital elements:
1998 OS4
Epoch 1998 July 26.0 TT = JDT 2451020.5                 Williams
M 354.79020              (2000.0)            P               Q
n   0.21720814     Peri.   31.15769     +0.84642411     +0.50574190
a   2.7408503      Node   297.55863     -0.51904481     +0.71359715
e   0.4848739      Incl.   10.83861     -0.11899037     +0.48477235
P   4.54           H   18.5           G   0.15
From 21 observations 1998 July 26-29.

Ephemeris:
1998 OS4                 a,e,i = 2.74, 0.48, 11                  q = 1.4119
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
1998 07 26    22 00.77   -03 20.6    0.458    1.432   150.7    20.3    18.6
1998 07 31    22 01.29   -00 50.0    0.442    1.425   153.5    18.6    18.5
1998 08 05    22 01.05   +01 39.0    0.431    1.419   155.9    17.0    18.3
1998 08 10    22 00.20   +04 02.8    0.423    1.415   157.8    15.7    18.2
1998 08 15    21 58.87   +06 18.0    0.420    1.412   158.9    15.0    18.2
1998 08 20    21 57.28   +08 21.3    0.420    1.412   159.1    14.8    18.2
1998 08 25    21 55.66   +10 10.2    0.423    1.413   158.4    15.3    18.2

1998 09 04    21 53.37   +12 59.6    0.441    1.421   155.1    17.4    18.4
1998 09 14    21 53.60   +14 45.6    0.472    1.436   150.5    20.2    18.7
1998 09 24    21 57.26   +15 38.6    0.515    1.457   145.4    23.0    19.0
1998 10 04    22 04.65   +15 55.2    0.570    1.485   140.3    25.5    19.3
1998 10 14    22 15.40   +15 51.6    0.637    1.518   135.3    27.5    19.7
1998 10 24    22 28.92   +15 40.3    0.715    1.556   130.3    29.2    20.0
1998 11 03    22 44.60   +15 30.9    0.804    1.598   125.3    30.4    20.4
1998 11 13    23 01.83   +15 28.6    0.905    1.644   120.3    31.3    20.7
1998 11 23    23 20.12   +15 36.1    1.016    1.693   115.3    31.8    21.0
1998 12 03    23 39.14   +15 54.5    1.138    1.744   110.2    32.0    21.3
1998 12 13    23 58.58   +16 23.1    1.270    1.797   105.0    31.9    21.6
1998 12 23    00 18.29   +17 00.6    1.410    1.852    99.8    31.6    21.9

Gareth V. Williams           (C) Copyright 1998 MPC           M.P.E.C. 1998-O25

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