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Minor Planet Center

MPEC 1998-E02 : 1998 DG16

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M.P.E.C. 1998-E02                                Issued 1998 Mar. 1, 16:54 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/iau/mpc.html

                                   1998 DG16

Observations:
     J98D16G* C1998 02 27.60011 13 00 58.89 -09 59 11.1          19.1 V      566
     J98D16G  C1998 02 27.61027 13 00 56.77 -09 59 30.2          18.8 V      566
     J98D16G  C1998 02 27.62043 13 00 54.60 -09 59 48.6          18.9 V      566
     J98D16G  C1998 02 28.33767 12 58 30.19 -10 22 33.9                      673
     J98D16G  C1998 02 28.34815 12 58 27.89 -10 22 54.1                      673
     J98D16G  C1998 02 28.36782 12 58 23.51 -10 23 32.0                      673
     J98D16G  C1998 02 28.57558 12 57 40.84 -10 29 30.7          19.6 V      426
     J98D16G  C1998 02 28.59701 12 57 36.11 -10 30 12.2                      426
     J98D16G  C1998 02 28.60302 12 57 34.84 -10 30 24.1                      426
     J98D16G WC1998 03 01.09730 12 55 46.73 -10 46 56.5                      557
     J98D16G  C1998 03 01.09963 12 55 46.33 -10 47 00.5                      557
     J98D16G  C1998 03 01.10196 12 55 45.78 -10 47 05.8          19.1 V      557
     J98D16G  C1998 03 01.34656 12 54 53.24 -10 54 52.3                      673
     J98D16G  C1998 03 01.34986 12 54 52.30 -10 54 59.2                      673
     J98D16G  C1998 03 01.35605 12 54 50.99 -10 55 12.4                      673

Observer details:
426 Woomera.  Observer F. B. Zoltowski.  0.30-m f/3.3 Schmidt-Cassegrain + CCD
557 Ondrejov.  Observer P. Pravec.  0.65-m f/3.6 reflector + CCD.
566 Haleakala-NEAT/GEODSS.  Observers E. F. Helin, S. Pravdo, K. J. Lawrence,
    D. L. Rabinowitz for the NEAT team.  1.0-m f/2.2 GEODSS telescope + CCD.
673 Table Mountain Observatory, Wrightwood.  Observer D. L. Rabinowitz.  0.6-m
    reflector + CCD.

Orbital elements:
1998 DG16
Epoch 1998 Feb. 16.0 TT = JDT 2450860.5                 Williams
M 175.40380              (2000.0)            P               Q
n   1.15112141     Peri.  358.05851     +0.95320605     +0.29333034
a   0.9016859      Node   344.27986     -0.27360740     +0.73404967
e   0.3431871      Incl.   15.67044     -0.12859715     +0.61247726
P   0.86           H   20.5           G   0.15
From 15 observations 1998 Feb. 27-Mar. 1.

Ephemeris:
1998 DG16                a,e,i = 0.90, 0.34, 16                  q = 0.5922
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     V
1998 02 26    13 06.06   -09 09.5    0.275    1.210   138.5    32.9    19.5
1998 03 03    12 48.47   -11 48.6    0.250    1.207   146.0    27.3    19.1
1998 03 08    12 25.34   -14 38.3    0.230    1.202   153.4    21.7    18.8
1998 03 13    11 56.49   -17 28.0    0.214    1.196   158.5    17.7    18.5
1998 03 18    11 22.78   -20 00.3    0.205    1.188   157.9    18.4    18.4
1998 03 23    10 46.47   -21 56.2    0.202    1.178   151.1    24.2    18.5
1998 03 28    10 10.74   -23 05.5    0.206    1.166   141.5    32.2    18.8
1998 04 02    09 38.50   -23 31.7    0.215    1.153   131.5    40.5    19.1
1998 04 07    09 11.29   -23 27.8    0.227    1.138   122.1    48.2    19.4
1998 04 12    08 49.27   -23 07.5    0.242    1.121   113.6    55.0    19.7
1998 04 17    08 31.80   -22 40.6    0.258    1.103   105.9    61.1    19.9
1998 04 22    08 18.01   -22 13.1    0.274    1.082    99.1    66.5    20.2
1998 04 27    08 07.01   -21 47.7    0.289    1.061    92.8    71.4    20.4
1998 05 02    07 58.01   -21 25.5    0.303    1.037    87.0    76.0    20.6
1998 05 07    07 50.24   -21 05.9    0.315    1.012    81.6    80.5    20.8
1998 05 12    07 43.07   -20 46.7    0.326    0.985    76.3    84.9    21.0
1998 05 17    07 35.94   -20 24.8    0.334    0.957    71.2    89.5    21.2
1998 05 22    07 28.40   -19 56.3    0.340    0.928    66.0    94.4    21.4
1998 05 27    07 20.03   -19 16.1    0.345    0.897    60.8    99.6    21.6
1998 06 01    07 10.44   -18 17.8    0.347    0.865    55.4   105.3    21.8
1998 06 06    06 59.37   -16 53.2    0.350    0.833    49.8   111.5    22.1

Gareth V. Williams           (C) Copyright 1998 MPC           M.P.E.C. 1998-E02

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