Central Bureau for Astronomical Telegrams
IAUC 5091: 1990j; 1945B; 1990c; BC UMa
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Circular No. 5091
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 MUELLER (1990j)
Jean Mueller reports her discovery of a comet on a plate taken
in the course of the second Palomar Sky Survey. The following
observations were measured by Mueller:
1990 UT R.A. (1950) Decl. m1 Observer
Sept.15.34653 0 44 43.68 +12 33 54.8 17 Mueller
15.40299 0 44 42.90 +12 33 44.1 "
16.39253 0 44 23.93 +12 29 06.9 17 Holt
16.42795 0 44 23.21 +12 28 54.0 "
J. Mueller and J. D. Mendenhall (Palomar). 1.2-m Oschin Schmidt
Telescope. Beginning and end measurements of trail. Tail visible
toward south-southwest.
H. E. Holt, H. R. Holt, C. M. Olmstead, and J. Brown (Palomar).
0.46-m Schmidt telescope. Central condensation reasonably dark;
fan tail toward southwest.
SUPERNOVA 1945B IN NGC 5236
IBVS 3497 notes the discovery by W. Liller on plates taken at
what was then Harvard's station in Bloemfontein of a supernova 97"
west and 175" south of the nucleus of NGC 5236 = M83. First detected
at B = 14.2 on 1945 July 13.9, it was followed to Aug. 7.9.
Supernovae 1923A, 1950B, 1957D, 1968L, and 1983N also occurred in
this galaxy.
COMET LEVY (1990c)
Total visual magnitude estimates (cf. IAUC 5080): Aug. 30.56
UT, 3.6 (M. Ohkuma, Tokyo, Japan, 11x80 binoculars); Sept. 2.16,
3.7 (C. S. Morris, Pine Mountain Club, CA, 10x50 binoculars); 8.18,
4.3 (Morris; 3.5-deg tail); 9.14, 4.3 (A. Hale, Las Cruces, NM,
naked eye); 11.79, 5.0 (H. Mikuz, Cres, Yugoslavia, 7x50 binoculars);
13.84, 5.0 (A. Pereira, Linda-a-Velha, Portugal, 9x34 binoculars).
BC URSAE MAJORIS
Visual magnitude estimates (cf. IAUC 5089): Aug. 24.86 UT,
[13.0 (P. Schmeer, Bischmisheim, W. Germany); Sept. 11.15, 11.5
(Schmeer); 12.84, 11.8 (B. H. Granslo, Fjellhamar, Norway); 13.99,
11.8 (Granslo).
1990 September 17 (5091) Daniel W. E. Green
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