------------------------------------------------------------------- THE ASTRONOMER Electronic Circular No 921 1995 Feb 05 12.10UT Ed:Guy M Hurst, 16,Westminster Close, Kempshott Rise, Basingstoke, Hants, RG22 4PP,England. Telephone/FAX(0256)471074 Int:+44256471074 INTERNET: GMH at AST.STAR.RL.AC.UK or GMH at GXVG.AST.CAM.AC.UK ------------------------------------------------------------------- CATACLYSMIC MONITORING We have received a request from professional astronomers to monitor the following stars, especially during an observing run being undertaken on Feb 17-19 at La Palma: SY Cnc; CN Ori; U Gem; KT Per; HT Cas; Z Cam. Information is also needed prior to the run to assess the likely time of the next outbursts. Could observers please e-mail their results on these stars daily throughout February. COVER MATERIAL There is an acute shortage of cover material for the Feb TA. Could anyone with material please e-mail details and send it through as soon as possible. It would be needed by Feb 10 at TA HQ. COMET 41P/TUTTLE-GIACOBINI-KRESAK Recovered by S. M. Larson and C. W. Hergenrother at Kitt Peak at a DeltaT of +0.24 day from the prediction on MPC 20122. Additional observations: 0041P C1995 01 28.19241 04 43 57.76 +12 12 04.8 21.2 T 691 0041P C1995 01 28.20155 04 43 57.46 +12 12 06.9 21.8 T 691 0041P C1995 01 28.20589 04 43 57.33 +12 12 07.7 691 0041P C1995 01 29.25714 04 43 25.77 +12 16 58.3 691 0041P C1995 01 29.26730 04 43 25.55 +12 17 01.3 691 0041P C1995 01 29.27505 04 43 25.26 +12 17 03.8 21.9 T 691 691 Steward Observatory, Kitt Peak. Observers S. M. Larson, C. W. Hergenrother. 2.3-m Steward Observatory reflector. Orbital elements: 41P/Tuttle-Giacobini-Kresak Epoch 1995 July 22.0 TT = JDT 2449920.5 T 1995 July 28.71362 TT Marsden q 1.0653214 (2000.0) P Q n 0.18054920 Peri. 61.67413 -0.91229261 +0.39718699 a 3.1003139 Node 141.48995 -0.40886710 -0.86936907 e 0.6563827 Incl. 9.22544 -0.02344965 -0.29400667 P 5.46 MPEC C09 COMET P/1989 T2 (HELIN-ROMAN-ALU 1) This comet has been observed all around its orbit. Additional observations: PJ89T020 C1995 01 28.46318 13 27 03.79 +01 26 46.9 691 PJ89T020 C1995 01 28.46568 13 27 03.84 +01 26 46.8 691 PJ89T020 C1995 01 28.47050 13 27 03.90 +01 26 47.2 691 PJ89T020 C1995 01 29.48024 13 27 14.13 +01 27 35.2 19.7 T 691 PJ89T020 C1995 01 29.48269 13 27 14.15 +01 27 35.5 19.6 T 691 PJ89T020 C1995 01 29.48494 13 27 14.19 +01 27 35.6 19.7 T 691 PJ89T020 C1995 02 01.51391 13 27 39.51 +01 30 31.1 21.2 N 691 PJ89T020 C1995 02 01.53054 13 27 39.58 +01 30 31.9 19.3 T 691 PJ89T020 C1995 02 01.54492 13 27 39.72 +01 30 32.8 19.2 T 691 Orbital elements: P/1989 T2 (Helin-Roman-Alu 1) Epoch 1997 Mar. 13.0 TT = JDT 2450520.5 T 1997 Mar. 26.86970 TT Marsden q 3.7148037 (2000.0) P Q n 0.10302089 Peri. 215.07650 +0.31018748 +0.93673179 a 4.5066365 Node 73.47353 -0.82897125 +0.35004696 e 0.1757037 Incl. 9.74228 -0.46539272 +0.00082426 P 9.57 MPEC C11 Guy M Hurst