------------------------------------------------------------------- THE ASTRONOMER Electronic Circular No 1516 2000 Apr 29 16.06UT 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 ------------------------------------------------------------------- 1999 KW4 Further observations of this asteroid (cf MPEC 1999-K28) have been made on Apr 26-28 at station 860 Valinhos by P. R. Holvorcem (0.36-m f/3.6 Schmidt-Cassegrain + CCD). Revised orbital elements: 1999 KW4 PHA 0.030A Epoch 2000 Feb. 26.0 TT = JDT 2451600.5 Williams M 344.72849 (2000.0) P Q n 1.91454929 Peri. 192.59261 +0.25954364 -0.78042186 a 0.6423302 Node 244.94767 +0.93154802 +0.35764523 e 0.6883250 Incl. 38.89632 +0.25466722 -0.51286608 P 0.51 H 16.7 G 0.15 U 4 The resulting ephemeris suggests the asteroid may be quite bright in late May presented a good opportunity for imaging with CCDs: Date TT R. A. (2000) Decl. Delta r Elong. Phase V 2000 04 26 22 33.52 -26 09.5 0.375 0.926 66.9 91.3 17.6 2000 05 01 22 22.63 -23 49.7 0.330 0.962 72.7 88.2 17.3 2000 05 06 22 09.65 -20 36.1 0.284 0.994 78.9 84.9 16.9 2000 05 11 21 52.85 -16 00.9 0.239 1.020 85.7 80.8 16.5 2000 05 16 21 29.44 -09 13.2 0.196 1.042 93.7 75.5 15.9 2000 05 21 20 54.63 +01 09.7 0.158 1.059 103.1 68.5 15.2 2000 05 26 20 00.67 +16 13.4 0.134 1.072 112.7 60.7 14.7 2000 05 31 18 40.06 +32 53.9 0.131 1.080 117.3 56.5 14.5 2000 06 05 17 02.50 +43 36.7 0.150 1.084 113.8 58.9 14.9 2000 06 10 15 38.63 +46 52.4 0.185 1.084 106.9 63.7 15.5 2000 06 15 14 41.88 +46 32.8 0.228 1.079 100.0 68.0 16.0 2000 06 20 14 05.74 +45 11.6 0.274 1.070 93.8 71.4 16.5 2000 06 25 13 42.10 +43 42.9 0.321 1.056 88.2 74.1 16.9 2000 06 30 13 25.83 +42 21.7 0.367 1.038 83.0 76.4 17.3 2000 07 05 13 13.96 +41 11.0 0.412 1.015 78.1 78.5 17.5 M.P.E.C. 2000-H37 V826 CAS Since the note on E1515, an improved (b) chart has been developed for this variable and also a (c) format added. These are both under revision 000428. Guy M Hurst