THE ASTRONOMER Electronic Circular No 632 1992 Apr 26 13.26UT
Ed:Guy M Hurst, 16,Westminster Close, Kempshott Rise, Basingstoke,
Hants, RG22 4PP,England. Telephone/FAX(0256)471074 Int:+44256471074
Telex: 9312111261 Answerback: TA G JANET BOXES:
GMH at UK.AC.CAM.ASTRONOMY.STARLINK or GUYH at UK.AC.SUSSEX.CLUSTER
TELECOM GOLD: 10074:MIK2885 PRESTEL 256471074
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COMET SHOEMAKER-LEVY (1991a1)
Observers are reminded that this comet is expected to brighten to
around magnitude 6.5 and be well placed at high northerly
declination over the coming months.
Revised elements and ephemeris (calculated using EPH.EXE by
N.James) follow:
T 1992 July 24.5533 TT w 145.22740 )
e 0.99985900 O 49.05510 ) 2000.0
q 0.8367200 A.U. i 113.50890 )
Source: MPC 19655 Positions are geocentric
m = 7.5 + 5.0 log R + 10.0 log r
Date R.A. (2000) Dec. R r Elong Mag. Motion
h m o ' (AU) (AU) o "/hr
P.A.
1992 Apr
28.00 0 52.65 +39 13.5 2.493 1.722 31.9 11.8 48 29
1992 May
3.00 0 56.85 +40 42.8 2.396 1.656 33.8 11.6 53 28
8.00 1 1.32 +42 22.2 2.293 1.589 35.9 11.3 58 26
13.00 1 6.13 +44 13.4 2.184 1.523 38.2 11.0 65 25
18.00 1 11.39 +46 18.5 2.069 1.457 40.5 10.7 72 23
23.00 1 17.29 +48 40.2 1.950 1.392 42.9 10.4 82 23
28.00 1 24.16 +51 21.8 1.826 1.327 45.3 10.0 93 22
1992 June
2.00 1 32.52 +54 27.7 1.700 1.263 47.7 9.7 108 22
7.00 1 43.33 +58 3.1 1.571 1.201 49.9 9.3 126 23
12.00 1 58.54 +62 13.7 1.442 1.141 51.9 8.9 149 26
17.00 2 22.54 +67 3.8 1.316 1.084 53.5 8.4 179 30
22.00 3 6.92 +72 27.5 1.196 1.030 54.7 8.0 217 40
27.00 4 45.36 +77 25.8 1.088 0.980 55.4 7.6 262 64
1992 July
2.00 7 50.13 +77 55.1 0.996 0.936 55.4 7.2 314 110
7.00 10 5.86 +70 51.6 0.930 0.899 54.8 6.9 360 143
12.00 11 4.62 +59 50.9 0.897 0.869 53.6 6.7 387 158
SUPERNOVA 1992U IN ESO 74-G4
J. Maza, University of Chile; and M. Hamuy, Cerro Tololo
Interamerican Observatory, report the discovery by R. Antezana of a
supernova located about 18" east and 9" north of the nucleus of the
spiral galaxy ESO 74-G4 (= PGC 65177, R.A. = 20h35m42s, Decl. =
-70d52'21", equinox 1950.0). The supernova, of mpg about 18.5, was
found on a 20-min unfiltered IIa-O plate taken by Antezana with the
CTIO Curtis Schmidt telescope on Apr. 9.359 UT. It was not present
(mpg [20) on a IIa-O plate taken with the same telescope by
L. Wells on Apr. 3. Confirmation was made by Y.-C. Kim from B and V
CCD images obtained in nonphotometric conditions on Apr. 15.4 with
the CTIO 0.9-m telescope.
IAUC 5499
SUPERNOVA 1992H IN NGC 5377
Visual magnitude estimates: Feb. 22.98 UT, 14.6 (M. Villi and G.
Cortini, Mount Colombo, Italy); 23.94, 14.2 (S. Pesci, Milan,
Italy); 28.29, 15.2 (W. Wren, McDonald Observatory); 29.98, 14.5
(Pesci); Mar. 30.25, 15.5 (Wren); Apr. 9.26, 15.5: (Wren); 19.24,
15.7 (Wren).
IAUC 5502
Guy M Hurst