THE ASTRONOMER Electronic Circular No 471 1990 Dec 30 11.01UT
Ed:Guy M Hurst, 16,Westminster Close, Kempshott Rise, Basingstoke,
Hants, RG22 4PP, England. Telephone: (0256)471074 Int:+44256471074
Telex: 94082518 Answerback: TAGUY Microlink: MAG60138
JANET:GMH @ UK.AC.CAM.ASTRONOMY.STARLINK GUYH@UK.AC.SUSSEX.CLUSTER
TELECOM GOLD: 10074:MIK2885 PRESTEL 256471074
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TAV 0033+59
Additional estimates to those on E469:
1990 Nov 18.02UT, 11.8v (Margareta Westlund, Sweden); 18.74, 11.7v
(Westlund); Dec 20.0, 11.5pv (M.Collins, Sandy); 27.79, 11.9v
(G.Poyner, Birmingham); 29.95, 11.8v (Poyner).
Graeme Waddington (Oxford) has checked the 'LS' reference where the
star's spectral type is given as OBce, (le) and in a supplement
as OB ce, (le), h. Explanatory codes:
h = Halpha emission observed.
ce= continuous emission near Balmer limit
le= emission lines on Blue plate
The photographic magnitude is given as 11.7.
It is important to establish the previous behaviour of this star
and presumably photographers may well have several photographs of
this area of Cas. Please e-mail positive or negative results.
SUPERNOVA 1990ah IN UGC 249
C. Pollas, Observatoire de la Cote d'Azur, reports his discovery, on
panchromatic film exposed on Dec. 7.77 UT, of a supernova of mag 18
in UGC 249. The supernova is located at R.A. =0h23m34s.91,
Decl. = +13 22'44".3 (equinox 1950.0), or 3".4 east and 7".7 north of
the galaxy's centre. There is a nearby star (mag 17) at R.A. =
0h23m36s, Decl. = +13 22'.1.
IAUC 5146
SUPERNOVA 1990ai IN ANONYMOUS GALAXY
C. Pollas, Observatoire de la Cote d'Azur, reports his discovery on a
film exposed Nov. 26.08 UT of a supernova (mag about 19.5) located at
R.A. = 7h17m11s.29, Decl. = +21 59'57".3 (1950.0). Two nearby
galaxies are host candidates, one more compact and less diffuse than
the other; there are many faint, starlike galaxies in this area. The
galaxy positions are R.A. = 7h17m11s.15, Decl. = +22 00'01".2;
R.A. = 7h17m11s.43, Decl. = +21 59'54".2.
IAUC 5147
P/COMET SHOEMAKER-LEVY 2 (1990p)
Recent results by S.Larson and D.Levy, University of Arizona show
that 1990 UL3 has a tail of 28" in pa 58deg (Dec 19.3UT). It has
been redesignated as Comet (1990p).
IAUC 5149
1980 WF
Rob. H. McNaught, University of Adelaide, reports his recovery of
this Amor-type object with the Uppsala Schmidt telescope at Siding
Spring (indicated correction to the ephemeris on MPC 17468:
Delta(T) = +4.7 days).
1990 UT R.A. (1950) Decl. V
Dec. 26.67199 4 58 27.18 - 8 08 49.0 15
26.68218 4 58 30.48 - 8 09 16.7
Orbital elements by B. G. Marsden, Center for Astrophysics,
from 12 observations 1980-1990:
Epoch = 1991 Jan. 24.0 ET
T = 1990 Dec. 28.3266 ET Peri. = 212.8531
e = 0.514841 Node = 241.0697 1950.0
q = 1.083492 AU Incl. = 6.4132
a = 2.233272 AU n = 0.2953192 P = 3.337 years
IAUC 5152
Guy M Hurst