THE ASTRONOMER Electronic Circular No 534 1991 June 23 15.45UT
Ed:Guy M Hurst, 16,Westminster Close, Kempshott Rise, Basingstoke,
Hants, RG22 4PP, England. Telephone: (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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TAV 0714+17 (=Q1991/12)
Mike Collins, Sandy, reports his discovery of an uncatalogued
variable star in Gemini and located at:
RA 07h 14.4m DEC +17 59'(1950).
The star was recorded at magnitude 11.5 on a Kodak 2415 exposure of
1991 Jan 13. Analysis of results 1975 Dec 29 to date show a range
of 10.3-11.9. It is catalogued as Dearborn 12921 (red magnitude
11.5, Sp=M5) and in the Guide Star Catalog as GSC 1350.00602.
An e-chart follows:
\\\\\\ Q1991/12 0714+17 var in Gem discovered by Mike Collins
S,120,20,S
P,07h 14.4m +17 59' (1950)
O,61,60,10.3,11.9
R,9.3,44,91,A
R,9.7,101,61,B
M,9,65,28,110,63,108,101,54,99,22,96,39,54
R,10.3,76,28,C
R,10.9,109,44,D
M,10,115,52,94,115,71,11,21,29,22,15,109,60,119,6
R,11.3,37,71,E,R
R,11.8,74,49,F
M,11,56,38,45,62,94,26,6,113,24,16,95,32,77,8
M,11,28,35,75,80,7,116,5,46,30,72,62,80
M,11,47,117,34,55
R,12.3,52,62,G,A
M,12,53,58,85,80,81,71,30,56,21,46,99,99,23,49
M,12,114,33,15,37,16,48,35,38,118,117,100,52,104,60
M,12,2,22,90,97,43,5,68,41,9,97,79,111,117,65
M,12,58,49,63,108,37,19,45,25,80,118
M,12,87,28,28,102
E,64
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PERIODIC COMET CHERNYKH (1991o)
Ephemeris by Hurst using a program developed by N.James and based
on the elements on E-Circular 530. The magnitude formula is from
the ICQ 1991 Handbook:
m1 = 4.5 + 5.0 log R + 15.0 log r
Date R.A. (1950) Dec. R r Elong Mag. Motion
h m o ' (AU) (AU) o "/hr P.A.
1991 June
23.00 23 23.43 -6 5.4 2.593 2.965 101.3 13.7 30 76
28.00 23 27.16 -5 51.9 2.508 2.941 105.1 13.5 27 77
1991 July
3.00 23 30.56 -5 41.0 2.424 2.918 109.0 13.4 25 79
8.00 23 33.61 -5 32.9 2.342 2.895 113.0 13.3 22 81
13.00 23 36.29 -5 27.8 2.263 2.872 117.1 13.1 19 85
18.00 23 38.55 -5 25.9 2.186 2.850 121.4 13.0 15 89
23.00 23 40.39 -5 27.3 2.112 2.828 125.7 12.9 12 97
28.00 23 41.78 -5 32.1 2.042 2.806 130.2 12.8 9 111
1991 Aug
2.00 23 42.70 -5 40.5 1.975 2.785 134.8 12.7 7 135
7.00 23 43.13 -5 52.4 1.913 2.763 139.5 12.5 7 169
Guy M Hurst