THE ASTRONOMER Electronic Circular No 457 1990 Oct 28 10.53UT Ed:Guy M Hurst, 16,Westminster Close, Kempshott Rise, Basingstoke, Hants, RG22 4PP, England. Telephone: (0256)471074 Int:+44256471074 Telex: 94082518 Answerback: TAGUY Microlink: MAG60138 JANET:GMH @ UK.AC.CAM.ASTRONOMY.STARLINK GUYH@UK.AC.SUSSEX.CLUSTER TELECOM GOLD: 10074:MIK2885 PRESTEL 256471074 -------------------------------------------------------------------- ROSAT MISSION Following the observing details given in E456, here is the target list of stars: Star RA (1950) DEC Range Type 1 2 3 TA Charts BAA VY Aqr 21h09m28s -09 01.9 8.0-6.6p UG y y 880723 AE Aqr 20h37m34s -01 03.0 10.4-12.5B XP y FO Aqr 22h15m19s -08 36.2 13.4-14.4p XPR y y V1101 Aql 20h10m44s +15 26.8 13.8-14.9p IS y OY Car 10h05m17s -69 59.4 12.2-17B UGSU yyyyyyy southern HT Cas 01h07m00s +59 48.1 12.6-19.3 UG yyyyyyy 850120 V436 Cen 11h11m35s -37 24.4 11.5-15.2B UGSU yyyyyyy southern SY Cnc 08h58m13s +18 06.1 10.6-14.0p UGZ y 901026 YZ Cnc 08h07m52s +28 17.6 10.2-14.6p UGSU yyyyyyy 901025 Z Cha 08h08m38s -76 23.5 11.5-16.2V UGSU yyyyyyy southern EY Cyg 19h52m41s +32 13.7 11.4-15.7p UGSS y 870704 V503 Cyg 20h25m33s +43 31.8 13.4-17.0p UGSS y y y 881123 V516 Cyg 20h45m18s +41 45 13.8-16.8p UGSS y y 901027 V542 Cyg 19h48m21s +58 22.3 13.0-18.3p UGSS y y 881227 V747 Cyg 20h35m42s +50 06.0 11.7-12.5p NL: y V751 Cyg 20h50m27s +44 08.1 13.8-16.3p ? y 901026 V811 Cyg 19h46m33s +36 18.8 12.7-[17.7pUGSS y 860817 V1028 Cyg 19h59m47s +56 48 13.0-18p UGSS y y 881223 V1060 Cyg 21h05m44s +37 01.9 13.5-18p UGSS y V1285 Cyg 19h42m59s +35 52.3 13.1-14.8p UGZ: y V1363 Cyg 20h04m16s +33 34.1 13.0-[17.6pUGZ y 901027 V1504 Cyg 19h27m20s +42 59.4 13.5-17.4p UGZ: y 901027 CM Del 20h22m38s +17 08.6 13.4-15.3p IS y 901026 IR Gem 06h44m31s +28 08 10.7-[14.5VUGSU yyyyyyy 880908 042.01 VW Hyi 04h09m30s -71 25.4 8.4-14.4V UGSU yyyyyyy southern WX Hyi 02h08m28s -63 33.1 9.6-14.8v UGSU yyyyyyy southern T Leo 11h35m53s +03 38.9 10- 15.7B UG yyyyyyy 880619 X Leo 09h48m21s +12 06.6 11.1-15.7V UGSS y y y 010.01 RU LMi 09h59m24s +34 08 13.8-19.5p UG y y 901027 RU Peg 22h11m36s +12 27.3 9.0-13.2V UGSS y 014.02 UV Per 02h06m45s +56 57.3 11.0-17.5V UGSS yyyyyyy 881228 016.03 TY Psc 01h22m48s +32 07.5 12.2-16.3p UGSU yyyyyyy 901025 TY PSa 22h46m56s -27 22.8 12.0-17 B UGSU y y southern VY Scl 23h26m21s -30 03.3 12.5-18.5p NL y southern V Sge 20h18m02s +20 56.6 8.6-13.9v E+NL y 901026 EK Tra 15h09m40s -64 55.1 10.4-[15.0vUGSU yyyyyyy southern SU UMa 08h08m05s +62 45.4 10.8-14.9V UGSU yyyyyyy 018.02 BC UMa 11h49m39s +49 31.4 10.9-18.3B UG y y 880530 IX Vel 08h13m50s -49 04.0 9.1-10.0p NL y y southern BB Vel 08h35m12s -47 12.3 13.8-16.0V UG y y southern CU Vel 08h56m41s -41 36.2 10.0-15.5V UGSU y southern VW Vul 20h55m34s +25 18.8 13.1-16.2B UGZ y y y 901026 AX PERSEI Stefan Korth, Monheim, Germany, e-mails an estimate of this symbiotic variable: 1990 Oct 18.93UT, 10.8. He mentions that according to GCVS4 elements an eclipse is expected with minimum on 1991 Jan 10. However as the last minimum in 1989 January took place 40 days earlier, the next event could occur at any time. Please monitor and e-mail results on this star as often as possible. A chart is available on e-mail request. Guy M Hurst