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IAUC 3870: A0538-66; Poss. OPTICAL BURSTER; 1983j; 1982k

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IAUC number 

                                                  Circular No. 3870
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


A0538-66
     Apparently independently of IAUC 3858, S. Tjemkes, University
of Amsterdam, informs us of the current outburst of A0538-66 and
refers to the paper by Skinner (1981, Space Sci. Rev. 30, 441).
He notes that the difference between on and off states exceeds 1
mag and that at the decay of the burst on Sept. 12.35 UT the
object was of mag 14.5.


POSSIBLE OPTICAL BURSTER
     S. Djorgovski writes that his spectroscopic observations on
Sept. 11 with the Lick Observatory's 3-m reflector show that the
candidate object at S = 00h54m50s10, K = -1P38'06" 7 (equinox
1950.0) proposed by Klemola (1983, P.A.S.P. 95, 241) for the
possible optical burster found by Popovic (1982, Bull. Inf. Cent.
Donnees Stellaires No. 22, p. 96) is a normal galactic star.


PERIODIC COMET IRAS (1983j)
     Ephemeris continuation from the elements on MPC 8139:

     1983/84 ET  R.A. (1950.0) Decl.      p        r       m1

     Sept.23     0 29.35    +28 17.7    0.785    1.729    11.4
     Oct.  3    23 56.90    +34 10.3
          13    23 26.15    +38 04.9    0.891    1.784    11.8
          23    23 01.62    +40 19.4
     Nov.  2    22 45.20    +41 30.2    1.099    1.861    12.4
          12    22 36.71    +42 09.1
          22    22 34.93    +42 37.9    1.357    1.957    13.1
     Dec.  2    22 38.52    +43 08.1
          12    22 46.40    +43 45.5    1.635    2.068    13.7
          22    22 57.68    +44 32.8
     Jan.  1    23 11.72    +45 29.9    1.920    2.189    14.3


PERIODIC COMET KOPFF (1982k)
     Total visual magnitude estimates: Aug. 2.24 UT, 8.9 (C. E.
Spratt, Victoria, BC, 0.20-m reflector); 8.08. 7.9 (J. E. Bortle,
Stormville, NY, 20 x 80 binoculars); 12.21, 8.6 (Spratt); Sept.
2.06, 8.3 (Bortle); 9.03, 8.5 (C. S. Morris, Harvard, MA, 20 x 80
binoculars).


1983 September 23              (3870)              Brian G. Marsden

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