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IAUC 3196: 1978c; 1975o

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IAUC number 

                                                  Circular No. 3196
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Cable Address: SATELLITES, NEWYORK     Telex: 921428
Telephone: (617) 864-5758


COMET BRADFIELD (1978c)
     The following positions have been reported:

     1978 UT             R. A. (1950) Decl.        m1    Observer
     Feb. 11.757      19 08.2       -44 54               Page
          28.37431    20 48 34.25   -24 51 38.3    5     Torres
     Mar.  2.38230    21 00 02      -21 43 30      4        "
           3.39214    21 05 47.84   -20 06 07.1    4        "
           4.39758    21 11 33.31   -18 27 33.3    4        "
           6.39828    21 23 05.57   -15 07 29.3    5        "
           8.40655    21 34 51.41   -11 42 46.9          Schuster
           9.40521    21 40 48      -10 00 10      6     Torres

A. A. Page (Mount Tamborine Obs.).  Correction to IAUC 3176.
C. Torres (Chilean National Observatory, Cerro Calan).
H.-E. Schuster (European Southern Obs.).  Measurer: R. M. West.

     The following improved parabolic elements, by B. G. Marsden,
satisfy 25 observations Feb. 6 to Mar. 8 within 2":

       T = 1978 Mar. 17.6898 ET  Peri. =  48.7045
                                 Node  = 259.7966   1950.0
       q = 0.436628 AU           Incl. =  51.0842

The resulting corrections to the ephemeris on IAUC 3177 are:

     1978 ET  dR.A. dDecl.   1978 ET  dR.A. dDecl.
     Mar. 18  -0m32  -3'4    Apr.  7  -0m72  +0'3
          23  -0.44  -3.2         12  -0.75  +1.7
          28  -0.57  -2.3         17  -0.75  +2.9
     Apr.  2  -0.66  -1.1         22  -0.75  +3.9


PERIODIC COMET GEHRELS 3 (1975o)
     Further precise positions have been reported as follows:

     1977/78 UT          R. A. (1950) Decl.        m1    Observer
     Nov. 18.40129    10 59 09.30   + 5 21 43.8          McCrosky
     Dec. 11.37934    11 15 04.81   + 3 34 45.9          Schwartz
     Mar.  5.56125    11 03 47.19   + 4 24 10.6   17     Kosai

R. E. McCrosky and G. Schwartz (Harvard Obs.).  Measurer: J. Bulger.
H. Kosai (Tokyo Obs., Kiso Station).  Tail 10' long in p.a. 300o.


1978 March 16                  (3196)              Brian G. Marsden

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