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IAUC 3147: 1977 UB; P/SCHWASSMANN-WACHMANN 1

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IAUC number 

                                                  Circular No. 3147
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Cables: SATELLITES NEWYORK  Telex: 921428  Telephone: (617) 864-5758


1977 UB
     C. T. Kowal, Hale Observatoriesl and W. Liller (assisted by
L. J. Chaisson), Center for Astrophysics, have identified further
observations of this object, as shown below.  The position by Kowal
is from a glass copy of the blue Palomar Sky Survey plate.  The
positions by Liller are from exposures with the Bruce 61-cm astrograph
(in 1941 and 1943) and Harvard's 155-cm reflector (in 1976).

     UT                  R.A. (1950) Decl.       Mag.   Location
1941 Jan. 23.857      7 54 52.15   +13 02 18.8   15     Bloemfontein
1943 Mar.  8.804      9 39 03.47   + 6 52 31.3   15       "
1952 Aug. 23.16736   18 28 16.92   -16 18 36.8   17     Palomar
1976 Nov. 17.09557    1 44.4       +10 42               Harvard, Mass.
     Dec. 16.07041    1 41.0       +10 20                 "

     Ephemeris continuation from the elements on IAUC 3145:

1977/78     R. A. (1950) Decl.    Delta     r     Mag.
Dec. 23     1 55.92    +11 12.7   17.28   17.79   18.5
Jan.  2     1 55.41    +11 09.5
     12     1 55.27    +11 08.2   17.58   17.78   18.5
     22     1 55.50    +11 09.0
Feb.  1     1 56.09    +11 11.9   17.91   17.76   18.6
     11     1 57.04    +11 16.6
     21     1 58.32    +11 23.1   18.22   17.74   18.6
Mar.  3     1 59.89    +11 31.1
     13     2 01.72    +11 40.5   18.47   17.72   18.6

     Mag. = 6.0 + 5 log Delta + 5 log r + 0.023 (phase angle)


PERIODIC COMET SCHWASSMANN-WACHMANN 1
     The following precise positions have been measured by J. H. Bulger
from exposures by G. Schwartz, R. E. McCrosky and C.-Y. Shao
with the Harvard College Observatory's 155-cm reflector:

     1977 UT             R.A. (1950) Decl.
     Mar. 18.05138    3 11 40.96   +26 19 26.7
     Aug. 18.35400    5 17 24.08   +30 49 10.9
          21.35872    5 19 09.52   +30 53 08.6


1977 December 5                (3147)              Brian G. Marsden

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