Central Bureau for Astronomical Telegrams
IAUC 3397: BD +61 1211; 1979h
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Read IAUC 3398
Circular No. 3397
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
BD +61 1211
R. Kimble, S. Kahn and S. Bowyer, University of California at
Berkeley, report: "We have observed photometrically the suspected
RS CVn binary BO +61 1211 = SAO 015338 with the 0.76-m telescope at
the Leuschner Observatory. The star has been identified by Liller
(IAUC 3176) as the optical counterpart to the x-ray source 2A
1052+606. In 20 nights spread over four cycles of the 7.5-day orbital
period (Crampton et al. 1979, submitted to Ap. J.), we see a
smooth variation of 0.32 +/- 0.02 mag in V and 0.36 +/- 0.02 mag in B.
This photometric variability confirms the classification of the object
as an RS CVn system, suggested by Charles et al. (1979, submitted
to Nature) on the basis of the observed x-rays and the presence
of Ca II H and K emission in the optical spectrum. The epoch
of maximum brightness of this unusually large photometric wave is
1979 May 30.1 UT."
COMET KOWAL (1979h)
E. Helin, California Institute of Technology, communicates the
following measurements, by D. R. Janke, of the plates obtained by
C. T. Kowal with the 1.2-m Schmidt telescope at Palomar:
1979 UT R. A. (1950) Decl.
July 24.21076 19 25 27.50 -17 48 14.8
25.20938 19 24 54.44 -17 50 32.8
27.22049 19 23 49.28 -17 55 08.2
The following parabolic orbital elements have been determined
by the undersigned. It is rather probable that the comet is a
short-period one, and the ephemeris is uncertain by perhaps 1o.
T = 1978 Jan. 23.28 ET Peri. = 61.11
Node = 146.22 1950.0
q = 2.2828 AU Incl. = 5.72
1979 ET R. A. (1950) Decl. Delta r m1
Aug. 15 19 15.73 -18 34.9 3.513 4.394 19.2
25 19 13.26 -18 52.8
Sept. 4 19 12.25 -19 07.9 3.882 4.555 19.5
14 19 12.71 -19 19.9
24 19 14.56 -19 28.7 4.315 4.716 19.9
1979 August 29 (3397) Brian G. Marsden
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