THE ASTRONOMER Electronic Circular No 794 1993 Nov 28 16.15UT
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 TELECOM GOLD: 10074:MIK2885
GMH at UK.AC.RUTHERFORD.STARLINK.ASTROPHYSICS STARLINK: RLSAC::GMH
GMH at UK.AC.CAM.ASTRONOMY.STARLINK STARLINK: CAVAD::GMH
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SUPERNOVAE 1993af, 1993ag, 1993ah
M. Hamuy, Cerro Tololo Interamerican Observatory; and J. Maza,
University of Chile, report the discovery of three apparent
supernovae on three 20-min unfiltered IIa-O plates taken by
G.Valladares with the CTIO Curtis Schmidt telescope.
SN 1993af (mpg about 17) was discovered by M. Wischnjewsky
(University of Chile) on a plate taken Nov. 15.30 UT; the new
object is located 220" east and 94" north of the nucleus of the
spiral galaxy NGC 1808 (R.A. = 5h05m59s, Decl. = -37o34'.7, 1950).
SN 1993ag (mpg about 18.5) was discovered by R. Antezana
(University of Chile) on an exposure taken Nov. 15.33, and is
located about 5" west and 6" south of the nucleus of an anonymous
galaxy at R.A. = 10h01m25s, Decl. = -35o13'.1.
SN 1993ah (mpg about 17) was discovered by Wischnjewsky on a plate
taken on Nov. 16.13, the new object being located 0".5 west and
8" north of the nucleus of the lenticular galaxy ESO 471-27
(R.A. = 23h49m15s, Decl. = -28o14'.6).
IAUC 5895
1993 WD
Further details of this object (cf E790, E791) are now available:
Orbital elements from MPEC 1993-W07:
T = 1994 Mar. 10.639 TT Peri. = 136.557
e = 0.27665 Node = 56.637 2000.0
q = 0.71096 AU Incl. = 61.890
a = 0.98287 AU n = 1.011484 P = 0.97 years
1993 TT R. A. (2000) Decl. Delta r Elong. Phase V
Nov 29 23 56.14 +33 20.8 0.204 1.106 121.2 49.7 14.1
Dec. 1 23 27.56 +34 38.5 0.228 1.098 113.9 55.2 14.5
3 23 04.31 +35 23.4 0.254 1.091 107.8 59.4 14.8
5 22 45.44 +35 48.5 0.281 1.082 102.7 62.6 15.1
7 22 30.05 +36 01.9 0.308 1.074 98.4 65.1 15.4
9 22 17.38 +36 08.5 0.337 1.066 94.6 67.1 15.6
DISK-LIKE OBJECT
Further to the report on E790, a fax has been received from Denmark
reporting that an object resembling the appearance of that seen
on 1993 October 20, was also observed on 1993 Nov 25 at 06.30UT,
again from the oil-rig Tyra East. No further details are yet
available.
COMET MUELLER (1993s)
The following parabolic orbital elements for this comet (cf E793)
are by Brian Marsden:
T = 1994 Dec. 29.901 TT Peri. = 86.793
Node = 100.021 2000.0
q = 2.31079 AU Incl. = 20.966
Ephemeris by G.Hurst using EPH.EXE by Nick James:
m = 8.0 + 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.
1993 Nov
19.00 6 59.23 +20 32.1 4.061 4.789 132.9 17.8 9 308
29.00 6 56.42 +20 56.7 3.878 4.709 143.7 17.7 14 298
1993 Dec
9.00 6 52.16 +21 25.5 3.718 4.629 154.8 17.5 19 294
19.00 6 46.65 +21 57.9 3.587 4.549 166.3 17.4 23 292
29.00 6 40.22 +22 32.7 3.486 4.469 178.0 17.2 25 291