Central Bureau for Astronomical Telegrams
IAUC 4395: U Sco; 1987A; 1987o
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Read IAUC 4396
Circular No. 4395
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
U SCORPII
D. Overbeek, Edenvale, R.S.A., reports (via R. H. McNaught,
Siding Spring Observatory, and P. Whitelock, South African
Astronomical Observatory) an outburst of the recurrent nova U Sco, as
indicated by the following visual magnitude estimates: May 5.55 UT,
[15.5 (T. Cragg, Siding Spring Observatory); 10, [13 (Overbeek);
10.78, [14.5 (McNaught); 16.08, 10.8 (Overbeek); 16.17, 10.8
(Overbeek); 16.45, 11.1 (Cragg); 16.91, 11.2 (M. Verdenet, Bourbon-
Lancy, France); 18.48, 11.1 (McNaught). U Sco has undergone
previous outbursts in 1863, 1906, 1936, and 1979 (cf. IAUC 3373).
SUPERNOVA 1987A IN THE LARGE MAGELLANIC CLOUD
Photodiode measures by A. Beresford, Adelaide, S. Australia):
May 15.45 UT, V = 2.88, B-V = +1.59. Further visual magnitude
estimates: May 15.34 UT, 2.8 (D. A. J. Seargent, The Entrance,
N.S.W.); 16.41, 2.9 (Beresford); 18.48, 2.8 (McNaught).
COMET SHOEMAKER (1987o)
Improved parabolic orbital elements from MPC 11831:
T = 1986 Nov. 20.58 ET Peri. = 17.42
Node = 267.65 1950.0
q = 5.4639 AU i = 132.50
1987 ET R. A. (1950) Decl. Delta r m1
May 25 16 17.14 +11 10.1 4.747 5.631 16.4
June 4 16 05.95 +12 22.0
14 15 55.18 +13 19.0 4.878 5.668 16.5
24 15 45.23 +14 00.9
July 4 15 36.42 +14 28.5 5.131 5.708 16.6
14 15 28.95 +14 43.8
24 15 22.91 +14 48.9 5.463 5.752 16.8
Aug. 3 15 18.32 +14 46.1
13 15 15.11 +14 37.7 5.825 5.799 17.0
NOVA ANDROMEDAE 1986
Visual magnitude estimates (cf. IAUC 4360): Apr. 1.15 UT, 12.3
(Verdenet); 23.09, 12.1 (P. Schmeer, Bischmisheim, West Germany);
May 1.10, 12.4 (Verdenet).
1987 May 18 (4395) Daniel W. E. Green
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