------------------------------------------------------------------- THE ASTRONOMER Electronic Circular No 1363 1998 Dec 06 12.16UT Ed:Guy M Hurst, 16,Westminster Close, Kempshott Rise, Basingstoke, Hants, RG22 4PP,England.Telephone/FAX(01256)471074Int:+441256471074 INTERNET: GUY@TAHQ.DEMON.CO.UK GMH at AST.STAR.RL.AC.UK WORLD WIDE WEB http://www.demon.co.uk/astronomer ------------------------------------------------------------------- COMET C/1998 U5 (LINEAR) Further to the note on E1357, this comet remains much brighter than the discovery results suggested. Updated orbital elements and an extension to the ephemeris on E1355 follows: T 1998 Dec 21.4337 TT w 50.91580 ) e 1.00000000 O 66.69340 ) 2000.0 q 1.2381240 A.U. i 131.81970 ) Source: MPC 32866 Positions are geocentric Ephemeris by G.Hurst using EPH.EXE by N.James: m = 8.0 + 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. 1998 Dec 6.00 21 42.05 +31 6.1 0.818 1.261 88.2 8.6 183 212 7.00 21 39.17 +30 6.7 0.846 1.258 86.4 8.6 169 212 8.00 21 36.57 +29 11.2 0.874 1.255 84.7 8.7 157 211 9.00 21 34.21 +28 19.2 0.902 1.253 83.1 8.8 146 211 10.00 21 32.07 +27 30.6 0.931 1.251 81.5 8.8 136 210 11.00 21 30.12 +26 45.0 0.959 1.249 79.9 8.9 127 210 12.00 21 28.33 +26 2.3 0.987 1.247 78.4 8.9 119 209 13.00 21 26.70 +25 22.1 1.016 1.245 77.0 9.0 111 209 14.00 21 25.21 +24 44.4 1.044 1.243 75.5 9.0 104 208 15.00 21 23.84 +24 8.9 1.073 1.242 74.2 9.1 98 208 16.00 21 22.58 +23 35.4 1.101 1.241 72.8 9.1 92 207 17.00 21 21.41 +23 3.8 1.129 1.240 71.5 9.2 86 207 18.00 21 20.34 +22 34.0 1.157 1.239 70.2 9.2 81 206 19.00 21 19.35 +22 5.9 1.185 1.239 68.9 9.3 76 206 20.00 21 18.43 +21 39.2 1.213 1.238 67.7 9.3 72 205 21.00 21 17.59 +21 14.0 1.241 1.238 66.5 9.4 68 205 22.00 21 16.80 +20 50.1 1.268 1.238 65.3 9.4 64 205 23.00 21 16.07 +20 27.5 1.296 1.238 64.1 9.5 61 204 24.00 21 15.40 +20 6.0 1.323 1.239 63.0 9.5 57 204 25.00 21 14.77 +19 45.5 1.350 1.239 61.8 9.6 54 203 26.00 21 14.19 +19 26.1 1.376 1.240 60.7 9.6 51 203 27.00 21 13.64 +19 7.7 1.403 1.241 59.6 9.7 49 202 28.00 21 13.14 +18 50.1 1.429 1.242 58.6 9.7 46 202 29.00 21 12.67 +18 33.4 1.455 1.244 57.5 9.8 44 202 30.00 21 12.23 +18 17.5 1.480 1.245 56.5 9.8 42 201 31.00 21 11.83 +18 2.3 1.506 1.247 55.5 9.8 40 201 SUPERNOVA 1998ew IN NGC 6943 J. Maza, Department of Astronomy, University of Chile, reports the discovery by R. Antezana, on a T-Max 400 film taken by L. E. Gonzalez with the Maksutov telescope at Cerro El Roble on Nov. 23.02 UT, of a supernova (B about 14) located at R.A. = 20h44m32s.1, Decl. = -68o43'37" (2000.0), which is 5" west and 73" north of the nucleus of NGC 6943. IAUC 7061 (extract) SUPERNOVA 1998ex IN MCG +11-10-16 J. Mueller reports her discovery of a supernova (mag about 18.5) on a red plate taken by herself with the 1.2-m Oschin Schmidt Telescope on Nov. 25 UT in the course of the second Palomar Sky Survey. SN 1998ex is located at R.A. = 7h41m42s.28, Decl. = +64o44'02".3 (2000), which is 5".1 west and 10".1 north of the centre of MCG +11-10-16. IAUC 7061 (extract) Guy M Hurst