THE ASTRONOMER Electronic Circular No 585 1991 Dec 12 20.14UT 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 ------------------------------------------------------------------- E-INDEX We welcome Salford Astronomical Society to our list of e-circular subscribers. They can be contacted on STARLINK using: MAVAD::SALFORDAC marked for the attention of Ken Irving. The equivalent address from JANET is: CBS%UK.AC.MAN.AST.STAR::SALFORDAC At present they are on 'READ-ONLY' and can therefore receive messages but not automatically reply at this stage. 1991 XB A fast-moving asteroidal object has been discovered by C. S. Shoemaker on exposures by E. M. Shoemaker, D. H. Levy, and herself with the 0.46-m Palomar Schmidt. The following precise positions have been measured by B. A. Skiff at the Lowell Observatory: 1991 UT R.A. (1950) Decl. Mag. Dec. 1.31197 3 37 51.86 +25 10 57.7 16.2 1.34427 3 37 56.10 +25 08 56.6 3.30885 3 42 35.77 +23 04 43.2 16.2 3.34131 3 42 39.99 +23 02 39.7 6.23298 3 49 20.34 +20 02 51.6 6.24322 3 49 21.52 +20 02 18.0 16.5 6.37344 3 49 37.71 +19 54 18.7 Orbital elements by E. Bowell, Lowell Observatory, from six of the above observations: T = 1991 Nov. 26.779 ET Peri. = 171.682 e = 0.60752 Node = 249.976 1950.0 q = 1.25928 AU Incl. = 16.577 a = 3.20852 AU n = 0.171493 P = 5.75 years 1991 ET R.A. (1950) Decl. Delta r V Nov. 30 3 34.70 +26 34.3 0.278 1.260 15.4 Dec. 5 3 46.52 +21 19.1 10 3 57.65 +16 19.3 0.294 1.269 15.7 15 4 08.12 +11 49.6 20 4 18.02 + 7 58.2 0.331 1.289 16.2 25 4 27.40 + 4 47.7 30 4 36.37 + 2 16.8 0.387 1.320 16.8 IAUC 5399 T LEONIS Patrick Schmeer, Germany e-mails that this star is again in outburst (cf E494): 1991 Dec 10.123, [14.2; 11.092, 12.5; 11.137, 12.0; 11.187, 11.5. Guy M Hurst