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IAUC 4134: BL Hyi = H0139-68; V926 Sco = MXB 1735-44; N Sco 1985; 1982i

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IAUC number 

                                                  Circular No. 4134
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 617-495-7244/7440/7444


BL HYDRI = H0139-68
     M. Cropper, Anglo-Australian Observatory, communicates: "
Observations on Oct. 31 and Nov. 3 using the Anglo-Australian
Telescope indicate that this AM-Her-type star is again in a faint
state (V = 17.3 +/- 0.4), only four months after it was reported to
be in a high state (IAUC 4077).  Low-resolution spectra show reduced
Balmer emission, except for H-alpha, and no He II 468.6-nm emission,
much as was observed in the previous low state (Wickramingle
et al. 1984, Ap.J. 286, 328).  Zeeman absorption components around
H-beta and H-gamma are also evident."


V926 SCORPII = MXB 1735-44
     J. R. Thorstensen, Dartmouth College; R. H. D. Corbet, P. A.
Charles, T. Naylor and A. P. Smale, Oxford University; and J. W.
Menzies, South African Astronomical Observatory, report the detection
of a modulation with period 4.64 +/- 0.04 hr in 528 B-band CCD
photometric measurements obtained during Aug. 13-21 with the Cerro
Tololo 0.91-m and SAAO 1-m telescopes.  The lightcurve is quasisinusoidal
with amplitude 0.15 mag; significant random variations (~
0.01 mag) also occur.  This confirms and refines the tentative result
of McClintock and Petro (IAUC 3615).  Further observations are
urged to help refine the ephemeris.


NOVA SCORPII 1985
     The following infrared measures were made by P. Whitelock and
D. Laney using the 0.75-m reflector at the South African Astronomical
Observatory: Oct. 19.77 UT, J = 8.69, H = 8.13, K = 7.52;
21.73, 8.55, 8.04, 7.41; 25.74, 8.71, 8.40, 7.84.


PERIODIC COMET HALLEY (1982i)
     Total visual magnitude estimates: Oct. 29.43 UT, 7.8 (D. W. E.
Green, Cambridge, MA, 20 x 80 binoculars); Nov. 3.54, 7.5 (D. A.
Seargent, The Entrance, N.S.W., 15 x 80 binoculars); 6.24, 7.7 (C.
Spratt, Victoria, BC, 11 x 80 binoculars); 7.29, 7.2 (R. Keen, Mt.
Thorodin, CO, 8 x 40 binoculars; coma diameter 13'); 8.41, 6.3:
(C. S. Morris, Mt. Waterman, CA, naked eye); 9.17, 6.2 (Green,
Harvard, MA, 7 x 50 binoculars; diameter ~ 22').


1985 November 12               (4134)              Brian G. Marsden

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