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IAUC 3336: MXB1730-335; 1979a

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IAUC number 

                                                  Circular No. 3336
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 617-864-5758


MXB1730-335
     F. J. Marshall, Massachusetts Institute of Technology, reports
that the Rapid Burster has turned on again as expected (IAUC 3308).
It was in the SAS-3 field of view during Mar. 3.30-3.38 UT; the
earliest type II burst was detected on Mar. 3.32.  The bursts were
unusual in character: very flat and >~ 100 s in duration.  The
source was not in the field of view again until Mar. 4.92; many
normal type II bursts of duration ~ 10 s were seen at this time.  The
unusual shape of the bursts observed in the first period may be
characteristic of the early stages following turn-on.


PERIODIC COMET KOWAL 2 (1979a)
     T. Seki, Geisei, provides the following precise positions, the
first of them a correction to that on IAUC 3330:

     1979 UT             R. A. (1950) Decl.
     Feb.  1.49757     3 11 58.45   + 9 16 25.2
          16.49306     3 51 07.69   + 9 17 04.5
          27.54687     4 20 35.1    + 9 27 04
          28.50278     4 23 08.97   + 9 28 05.4

     Improved elliptical elements by B. G. Marsden:

       T = 1979 Jan. 14.046 ET
   Peri. = 189.621                    e =   0.58441
   Node  = 246.912   1950.0           a =   3.67693 AU
   Incl. =  15.845                    n =   0.139790
       q =   1.52811 AU               P =   7.05 years

     1979 ET     R. A. (1950) Decl.     Delta     r      m1
     Mar. 28     5 36.46    + 9 44.9    1.608   1.708   17.9
     Apr.  7     6 02.55    + 9 39.1
          17     6 28.12    + 9 24.2    1.849   1.806   18.4
          27     6 53.07    + 8 59.7
     May   7     7 17.34    + 8 25.4    2.110   1.917   18.9
          17     7 40.87    + 7 41.7
          27     8 03.65    + 6 49.0    2.385   2.036   19.5
     June  6     8 25.66    + 5 48.3
          16     8 46.92    + 4 40.3    2.664   2.160   20.0


1979 March 16                  (3336)              Brian G. Marsden

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