------------------------------------------------------------------- THE ASTRONOMER Electronic Circular No 1378 1999 Jan 24 18.03UT 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 ------------------------------------------------------------------- TA GALAXY CATALOGUE We are pleased to announce the availability of a new CD ROM. The TA galaxy catalogue contains images of nearly 1,000 galaxies obtained from the master collections of supernova hunters Mark Armstrong and Tom Boles. Each image has been processed in two different ways. The "raw" image is a low-contrast version which avoids saturating the galaxy's core. This allows suspects to be confirmed near to the galaxy. A "stretched" version burns out the galaxy core but clearly shows objects to the limit of the frame. This is more useful for confirming a faint object far from the galaxy core. Images are stored in the JPEG format and they can be found easily since both the raw and stretched images are linked to a web-based index. This can be accessed using a standard web browser such as Netscape or Internet Explorer. Each image is provided with the observer's name and the date of the exposure. Objects are indexed in NGC, IC, UGC and MGC sub-categories. The TA galaxy catalogue CD-ROM also includes a complete set of TA web pages. Editor: I am indebted to Nick James for preparation of this CD ROM and to Mark Armstrong and Tom Boles for 'donating' their images. The fully-inclusive, post-paid price for UK addresses is L15.00 (15 pounds) and L16.00 for overseas. Cheques should be made payable to 'The Astronomer' and, if sent from abroad, drawn on a London Bank in sterling. Orders and remittances should be sent to: Peter Meadows, 6 Chelmerton Avenue, Great Baddow, Chelmsford, Essex, CM2 9RE COMET C/1999 A1 (Tilbrook) This is the new designation for the comet reported on E1377. Orbital elements: T 1999 Jan 29.3950 TT w 232.35300 ) e 1.00000000 O 258.23900 ) 2000.0 q 0.7334100 A.U. i 88.88400 ) Source: IAUC 7085 Positions are geocentric Ephemeris by Guy Hurst using EPH.EXE by Nick James: m = 12.0 + 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. 1999 Jan 17.00 23 41.27 -33 58.8 0.694 0.774 51.5 10.1 160 175 22.00 23 41.88 -38 31.8 0.807 0.748 48.1 10.3 117 182 27.00 23 40.01 -41 54.8 0.916 0.735 45.3 10.5 90 191 1999 Feb 1.00 23 36.09 -44 28.2 1.018 0.735 43.0 10.7 71 201 6.00 23 30.65 -46 24.1 1.111 0.749 41.3 11.0 59 212 11.00 23 24.24 -47 51.0 1.193 0.775 40.3 11.3 50 222 16.00 23 17.35 -48 55.7 1.263 0.813 40.0 11.6 44 231 21.00 23 10.35 -49 44.2 1.321 0.859 40.6 11.9 40 238 26.00 23 3.43 -50 21.5 1.368 0.913 41.8 12.3 37 243 Guy M Hurst