------------------------------------------------------------------- THE ASTRONOMER Electronic Circular No 2070 2004 Dec 22 13.03UT 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.theastronomer.org ------------------------------------------------------------------- 2004 YD5 R. S. McMillan and S. B. Pope, Station 691 (Steward Observatory, Kitt Peak) have reported their detection with a 0.9-m f/3 reflector and CCD of a fast moving object positions for which have been measured by R. S. McMillan, A. S. Descour. 2004 12 20.21977 05 33 11.92 +24 47 00.4 17.9 V EY035691 2004 12 20.24516 05 32 53.11 +24 57 58.6 18.1 V EY035691 2004 12 20.27050 05 32 35.91 +25 07 18.8 17.9 V EY035691 2004 12 20.36964 05 31 45.13 +25 33 08.4 18.7 V EY035691 2004 12 20.37560 05 31 43.02 +25 34 15.6 18.7 V EY035691 2004 12 20.37947 05 31 41.59 +25 35 01.4 17.3 V EY035691 Further observations enabled the following elements to be published on M.P.E.C. 2004-Y35 issued on 2004 Dec 21: Orbital elements: 2004 YD5 Epoch 2005 Jan. 30.0 TT = JDT 2453400.5 MPC M 24.47350 (2000.0) P Q n 0.28742580 Peri. 262.06364 +0.98438303 +0.16439878 a 2.2739743 Node 88.45813 -0.12622531 +0.90842238 e 0.7828220 Incl. 3.61064 -0.12270787 +0.38437198 P 3.43 H 29.3 G 0.15 U 6 Timothy B Spahr comments that 2004 YD5 passed 0.00023 AU from the Earth on 2004 Dec. 19.86 UT. This is the equivalent of 21,379 miles. Although the object is now fainter than magnitude 20, the interesting section of the ephemeris (with small solar elongation angle) follows: Date TT R. A. (2000) Decl. Delta r Elong Phase V 2004 12 19.80 17 30.67 -40 10.7 0.00089 0.983 17.3 162.6 26.0 2004 12 19.85 16 46.52 -84 23.5 0.00026 0.984 61.2 118.8 16.1 2004 12 19.90 05 34.14 +05 29.8 0.00063 0.984 161.5 18.5 14.2 2004 12 19.95 05 33.12 +17 18.5 0.0013 0.985 172.3 7.6 15.4 2004 12 20.00 05 32.79 +20 54.2 0.0020 0.986 174.7 5.3 16.3 Guy M Hurst