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IAUC 5035: 1990f

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IAUC number 

                                                  Circular No. 5035
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Telephone 617-495-7244/7440/7444 (for emergency use only)
TWX 710-320-6842 ASTROGRAM CAM     EASYLINK 62794505
MARSDEN or GREEN@CFA.BITNET    MARSDEN or GREEN@CFAPS2.SPAN


PERIODIC COMET HONDA-MRKOS-PAJDUSAKOVA (1990f)
     J. V. Scotti reports his recovery of this comet with the
0.91-m Spacewatch telescope at Kitt Peak, as given below.  The
images are very slightly diffuse, of diameter about 5"-6".

     1990 UT             R.A. (1950) Decl.        m1
     June 17.41532   22 24 08.59   -13 46 48.4   19.5
          17.42138   22 24 09.44   -13 46 45.1
          17.43484   22 24 11.41   -13 46 39.4
          17.44745   22 24 13.28   -13 46 31.8
          17.45575   22 24 14.48   -13 46 28.6
          18.43567   22 26 43.36   -13 38 16.7
          18.44252   22 26 44.51   -13 38 13.5   19.4
          18.44913   22 26 45.54   -13 38 10.7

     The following orbital elements by B. G. Marsden, Center for
Astrophysics, are from 31 observations 1974-1990 (mean residual
1".1), with nongravitational parameters A1 = -0.40 +/- 0.12,
A2 = -0.0495 +/- 0.0002:

                    Epoch = 1990 Sept.26.0 ET
     T = 1990 Sept.12.6864 ET         Peri. = 325.7020
     e = 0.821936                     Node  =  88.7097  1950.0
     q = 0.541120 AU                  Incl. =   4.2224
       a =  3.038913 AU    n = 0.1860487    P =   5.298 years

     1990 ET      R.A. (1950) Decl.     Delta      r       m1
     June 18    22 25.62    -13 41.8    0.887    1.586    17.7
          23    22 39.12    -12 57.1
          28    22 54.69    -12 04.9    0.699    1.458    16.5
     July  3    23 13.16    -11 01.2
           8    23 35.80    - 9 39.9    0.528    1.324    15.1
          13     0 04.44    - 7 51.4
          18     0 41.65    - 5 21.2    0.385    1.187    13.4
          23     1 30.40    - 1 52.9
          28     2 32.27    + 2 37.0    0.298    1.046    11.8
     Aug.  2     3 43.54    + 7 29.9
           7     4 54.08    +11 33.1    0.310    0.904    10.6
          12     5 54.62    +14 08.3
          17     6 42.75    +15 29.9    0.416    0.766     9.8


1990 June 19                   (5035)             Daniel W. E. Green

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