THE ASTRONOMER Electronic Circular No 528 1991 June 5 18.50UT 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 ------------------------------------------------------------------- TASV 0358+57 (=Q1990/95) Mike Collins, Sandy, has reported a further discovery of a suspected variable star on photographs taken for the UK Nova/ Supernova Patrol on 1990 Dec 5. The star, located at: RA 03h58.2m DEC +57 18'(1950), apparently has a small range of 10.0-10.6 from an analysis of photographs taken between 1988 Nov 4 and 1991 Apr 4 (Kodak 2415). Mike Collins identifies the object as GSC 3726.01535 (V=10.45) and Dearborn 27830 (red magnitude 11.0, spectral class=M5). The e-mail chart follows: \\\\\\ Q1990/95 0358+57 variable in Cam discovered by Mike Collins S,120,20,S P,03h 58.2m +57 18' (1950) O,60,60,10.0,10.6 R,8.8,84,71,A,R M,8,89,12 R,9.3,43,23,B R,9.8,65,82,C,R M,9,91,63 R,10.2,21,97,D R,10.4,71,66,E R,10.9,70,26,F M,10,111,96,53,88,20,31,8,22 M,10,17,44,45,32,109,30,106,22 R,11.3,46,73,G,R M,11,85,110,32,95,39,104,67,60,62,107,34,69 M,11,23,114,40,101,96,95,12,105,6,61,57,117,52,22 M,11,16,21,6,27,93,49,112,36,28,5,113,53 M,11,99,51,94,47,34,56,23,20,93,48,115,42,63,56 M,11,25,36 M,12,2,60,4,108,5,17,24,106,7,81,73,67,45,113 M,12,23,115,28,61,30,77,9,114,43,87,24,89,118,78 M,12,60,98,55,65,52,65,51,84,79,77,67,108,25,67 M,12,109,101,55,109,59,72,57,70,92,23,14,43,96,44 M,12,112,22,57,35,96,30,26,23,24,47,20,7,46,33 M,12,6,24,32,52,47,51,38,29,56,18,99,56,81,19 E,87 ////// Chart automatically generated by GSC2FIND ver 1.0 STANDARD EQUINOX CHANGE The Central Bureau reports: "Plans are now well advanced to replace the 1950.0 standard equinox by the 2000.0 equinox for observations, orbits and ephemerides of comets and minor planets. IAU Commission 20 has recommended that the change (specifically from the FK4/B1950.0 system to the FK5/J2000.0 system) be made at the beginning of 1992. It can be noted that the 1992 editions of the Efemeridy Malykh Planet and the International Comet Quarterly Handbook are utilizing J2000.0, and that limited J2000.0 orbital data appear already in the 1991 May 28 MPCs. The IAU Circulars will follow the lead of the Minor Planet Circulars in this respect, and this will mean in essence that the J2000.0 system will be introduced here about six months from now, after the Nov. 21 MPCs have been prepared. Observers of novae, supernovae, etc., are advised that there are as yet no plans to abandon the 1950.0 equinox for non-solar system objects." IAUC 5278 Guy M Hurst