THE ASTRONOMER Electronic Circular No 633 1992 May 2 19.06UT 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 ------------------------------------------------------------------- DY PERSEI Professional Astronomers in Latvia have asked us to monitor DY Per (located RA 02h31.7m DEC +55 56 [1950]) which they believe may be of R-CrB type. Their research shows the range as 10.4-15.4V. The star was incorrectly referred to as FY Persei in E605. An e-mail chart follows: \\\\\\DY Per c Carbon Star S,120,10,S P,02h 31.7m +55 56' (1950) O,60,60,10.4,15.4V -S,TA920424 R,9.56,33,75,3 R,9.68,58,22,4,R R,11.07,83,44,7 R,11.18,79,51,9 R,11.68,44,96,12 R,11.88,95,50,13 R,12.10,58,73,14 R,12.56,64,60,16,B R,13.44,59,67,22,R R,14.25,68,65,27,R R,14.54,60,65,29,L R,15.08,59,62,30,L R,16.04,73,63,32,B M,9,45,118 M,10,118,9 M,11,102,106,7,41,7,37 M,12,2,74,8,27,18,48,23,45,60,29,7,89 M,12,31,46,94,67,72,95,71,88,12,66 M,12,99,92,5,71,78,12,68,13,111,11 M,13,112,82,36,40,71,79,20,84,48,26,90,71,72,95 M,13,89,105,93,72,78,72,48,60,39,27,2,35,37,66 M,13,46,91,68,115,47,85,16,115,54,87,20,90,43,39 M,13,87,18,92,18,12,22,88,8,55,21,36,13,2,12 M,13,66,17,13,18 M,14,59,60,98,87,108,40,69,45,57,93,43,118,48,117 M,14,26,59,57,31,2,73,50,64,1,32,37,50,46,53 M,14,7,103,93,60,97,15 M,15,96,56,25,19 E,84 ////// Basic chart automatically generated by GSC2FIND ver 1.1 A (b) chart with 438 stars and additional bright comparisons is available via the data file var.log which comes with updates of the FINDERS.EXE program. Alternatively paper versions of (b) and (c) will shortly be sent to GOLD e-subscribers who have also requested paper charts under category 9. PERIODIC COMET MUELLER 4 (1992g) S. Nakano, Sumoto, Japan, communicates an improved orbit from observations Apr. 9-22 (cf E630): T = 1992 Feb. 15.135 TT Peri. = 43.287 e = 0.38878 Node = 145.613 2000.0 q = 2.65571 AU Incl. = 29.976 a = 4.34493 AU n = 0.108825 P = 9.06 years IAUC 5505 The comet is currently fading below magnitude 17. Guy M Hurst