Central Bureau for Astronomical Telegrams
IAUC 5036: 1990g; 1990c; V1333 Aql; 1990M
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Read IAUC 5037
Circular No. 5036
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Telephone 617-495-7244/7440/7444 (for emergency use only)
TWX 710-320-6842 ASTROGRAM CAM EASYLINK 62794505
MARSDEN or GREEN@CFA.BITNET MARSDEN or GREEN@CFAPS2.SPAN
COMET McNAUGHT-HUGHES (1990g)
Robert H. McNaught reports his discovery of a comet on a U.K.
Schmidt Telescope R plate taken by Shaun M. Hughes at Siding Spring,
as indicated below. The discovery plate, which had cloud interference
at the end of the exposure, shows a moderately condensed 5"
coma. The June 20 exposure was by McNaught with the Uppsala
Southern Schmidt telescope.
1990 UT R.A. (1950) Decl. m1
June 19.55397 17 38 50.97 -65 32 04.5 17
19.59078 17 38 42.06 -65 31 49.8
20.61933 17 33 45.04 -65 23 29.6
COMET LEVY (1990c)
D. Klinglesmith, Joint Observatory for Cometary Research,
writes: "Observations were made on June 20.36 and 20.40 UT with a
300-mm Nikon lens and a Tektronics 512x512 CCD, yielding a 1.9-
degree field-of-view. Exposures with an H2O+ filter (620.5 nm, FWHM
= 5.0 nm) show an ion tail about 1 deg long at p.a. 259 deg. A red
continuum filter (647.0 nm, FWHM = 5.0 nm) shows only a very faint
hint of a tail perhaps 15'-20' long. A C2 filter (514.0 nm, FWHM =
6.0 nm) shows a round coma of diameter about 7'."
V1333 AQUILAE
S. A. Ilovaisky and C. Chevalier, Observatoire de Haute-
Provence, write: "Photometric monitoring of the optical counterpart
of the recurrent transient low-mass x-ray binary V1333 Aql (Aquila
X-1), obtained with the 1.2-m OHP reflector (+ RCA3 CCD camera)
between May 27 and June 19 UT, reveals that the source is currently
undergoing an outburst, which started sometime between May 31 and
June 17. The object was observed at V = 17.8, with no change in
brightness, on June 17 and 19. Analysis of available x-ray and
optical data between 1987 and 1990 (IAUC 4675, 4687, 4870) indicates
that the observed outbursts recur every about 295 +/- 10 days.
Further optical monitoring is currently in progress at OHP. X-ray
observations are urgently needed."
SUPERNOVA 1990M IN NGC 5493
Corrigendum. On IAUC 5034, line -10, for 11 000 km/s read
14 000 km/s
1990 June 20 (5036) Daniel W. E. Green
Read IAUC 5037
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