THE ASTRONOMER Electronic Circular No 642 1992 June 2 19.22UT 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 ------------------------------------------------------------------- COMET BRADFIELD (1992i) Tom Richards, Australia e-mails that this comet has been observed by Camilleri and Tregaskis on 1992 May 29-30 at approximately visual magnitude 11. Improved parabolic orbital elements by Marsden from 10 observations May 4-29: T = 1992 May 25.794 TT Peri. = 299.755 Node = 160.070 2000.0 q = 0.59239 AU Incl. = 158.566 IAUC 5530 Ephemeris by Hurst using EPH.EXE v2.15 by N.James: m = 11.0 + 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. 1992 June 1.00 7 5.83 +11 56.7 0.805 0.608 36.9 8.4 285 64 2.00 7 12.41 +12 44.0 0.843 0.614 37.2 8.5 256 64 3.00 7 18.31 +13 27.6 0.880 0.620 37.4 8.6 230 63 4.00 7 23.61 +14 7.8 0.919 0.627 37.4 8.8 208 62 5.00 7 28.38 +14 45.1 0.957 0.634 37.4 8.9 188 61 6.00 7 32.69 +15 19.8 0.995 0.642 37.3 9.1 171 61 7.00 7 36.58 +15 52.1 1.034 0.651 37.1 9.2 156 60 8.00 7 40.12 +16 22.4 1.072 0.661 36.8 9.3 142 59 9.00 7 43.33 +16 50.8 1.110 0.670 36.4 9.5 130 58 10.00 7 46.26 +17 17.5 1.147 0.681 36.0 9.6 120 57 11.00 7 48.94 +17 42.7 1.185 0.692 35.6 9.8 111 56 12.00 7 51.40 +18 6.4 1.222 0.703 35.1 9.9 102 55 13.00 7 53.66 +18 29.0 1.259 0.715 34.6 10.0 95 55 14.00 7 55.76 +18 50.3 1.295 0.727 34.0 10.2 89 54 15.00 7 57.69 +19 10.6 1.331 0.739 33.4 10.3 83 53 16.00 7 59.49 +19 30.0 1.366 0.752 32.8 10.4 78 52 17.00 8 1.17 +19 48.4 1.401 0.765 32.2 10.6 73 52 18.00 8 2.74 +20 6.0 1.435 0.778 31.5 10.7 69 51 19.00 8 4.21 +20 22.8 1.469 0.792 30.8 10.8 65 51 20.00 8 5.59 +20 38.9 1.502 0.806 30.2 10.9 62 50 NOVA CYGNI 1992 We have received a request from professional astronomers for a fully precise position for this nova to verify those already published as the data is evidently critical for observation with MERLIN. Can anyone with astrometric capability help please? EUVE SPACECRAFT We understand that this is ready for launch although bad weather over the weekend may result in a one day slip to 1992 June 5. It is hoped that we will be involved in joint PRO-AM projects when EUVE is fully operational. Guy M Hurst