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IAUC 4562: 1988c; 1987b1

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IAUC number 

                                                  Circular No. 4562
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
TWX 710-320-6842 ASTROGRAM CAM    Telephone 617-495-7244/7440/7444


COMET MAURY-PHINNEY (1988c)
     The following additional positions have been reported:

   1988 UT            R. A.  (1950)  Decl.       m1    Observer
   Feb. 19.67118    10 22 17.6    +39 02 12      18    Seki
   Mar.  6.33229     9 35 03.36   +51 43 00.5          Gibson
         6.33562     9 35 02.78   +51 43 07.4            "
         6.33924     9 35 02.13   +51 43 14.8            "
         7.29816     9 32 12.20   +52 15 34.8            "
         7.30045     9 32 11.85   +52 15 39.3            "
         7.30333     9 32 11.31   +52 15 44.9            "

T. Seki (Geisei).  0.60-m reflector.
J. Gibson (Palomar).  1.52-m reflector.  m2 about 17.5 on Mar. 7; faint
   tail about 20" long in p.a. 170 deg.

     The following improved parabolic orbital elements are from 11
observations, Feb. 16-Mar. 7:

         T = 1987 Dec. 26.792 ET     Peri. = 346.834
                                     Node  = 146.821   1950.0
         q =   1.93055 AU            i     =  93.163

     1988 ET     R. A. (1950) Decl.     Delta      r       m1
     Feb. 29     9 54.29    +47 29.9    1.232    2.086    17.6
     Mar.  5     9 39.05    +50 55.5
          10     9 24.41    +53 38.9    1.401    2.135    18.0
          15     9 10.92    +55 45.9
          20     8 58.99    +57 23.3    1.598    2.189    18.4
          25     8 48.90    +58 37.3
          30     8 40.75    +59 33.4    1.811    2.247    18.8
     Apr.  4     8 34.53    +60 15.8
           9     8 30.16    +60 48.2    2.028    2.310    19.2
          14     8 27.52    +61 12.9
          19     8 26.46    +61 32.0    2.242    2.377    19.5


COMET McNAUGHT (1987b1)
     Total visual magnitude estimates (B = binoculars):  Feb. 15.16
UT, 8.5 (S. Korth, Dusseldorf, West Germany, 0.36-m refl.); 21.43,
8.0 (J. E. Bortle, Stormville, NY, 10x50 B); 22.51, 8.4 (A. Hale,
Las Cruces, NM, 10x50 B); Mar. 6.02, 9.0 (Bortle, 0.32-m refl.).


1988 March 10                  (4562)            Daniel W. E. Green

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