Central Bureau for Astronomical Telegrams
IAUC 5218: 1991 DB; 1991M; UW Cen
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Read IAUC 5219
Circular No. 5218
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
1991 DB
Improved orbital elements from MPC 17972:
T = 1991 Apr. 18.2819 ET Peri. = 50.8976
e = 0.402912 Node = 157.8242 1950.0
q = 1.026799 AU Incl. = 11.4690
a = 1.719678 AU n = 0.4370524 P = 2.255 years
1991 ET R.A. (1950) Decl. Delta r m1
Mar. 15 11 07.66 +35 51.2 0.113 1.090 15.3
20 11 42.59 +46 36.0
25 12 35.87 +56 06.4 0.108 1.059 15.7
30 13 50.93 +62 31.8
Apr. 4 15 16.86 +64 57.8 0.123 1.038 16.5
9 16 31.45 +64 11.3
14 17 24.91 +61 47.0 0.148 1.028 17.1
19 18 00.98 +58 51.1
24 18 25.61 +55 53.5 0.175 1.029 17.5
29 18 42.94 +53 04.9
May 4 18 55.40 +50 27.8 0.202 1.041 17.7
9 19 04.36 +48 00.9
14 19 10.63 +45 41.0 0.225 1.063 17.9
SUPERNOVA 1991M IN IC 1151
I. Hook and R. McMahon, Institute of Astronomy, Cambridge; and
M. Irwin, Royal Greenwich Observatory, report the following CCD
magnitudes (+/- 0.1) obtained Mar. 15.25 UT with the 1.0-m Kapteyn
Telescope at the Observatorio del Roque de los Muchachos: B = 14.37,
V = 14.27, R = 14.17, I = 14.26.
UW CENTAURI
R. H. McNaught, University of Adelaide, forwards the following
visual magnitudes estimates by P. F. Williams, Heathcote, N.S.W,
which show that this R CrB-type variable is fading: Mar. 12.47 UT,
9.2; 15.53, 9.2; 17.49, 9.8; 18.49, 10.2.
1991 March 21 (5218) Daniel W. E. Green
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