THE ASTRONOMER Electronic Circular No 799 1993 Dec 19 18.40UT 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 TELECOM GOLD: 10074:MIK2885 GMH at UK.AC.RUTHERFORD.STARLINK.ASTROPHYSICS STARLINK: RLSAC::GMH GMH at UK.AC.CAM.ASTRONOMY.STARLINK STARLINK: CAVAD::GMH ------------------------------------------------------------------- COMET KUSHIDA-MURAMATSU (1993t) S. Nakano, Sumoto, Japan, reports the photographic discovery of a comet by Yoshio Kushida and Osamu Muramatsu: 1993 UT R.A. (2000) Decl. m1 Observer Dec. 8.65382 5 35 49.02 +22 33 05.1 16.5 Kushida 8.68646 5 35 47.44 +22 33 05.7 " 9.54254 5 35 06.94 +22 33 25.7 16.5 " 9.57813 5 35 05.26 +22 33 27.6 " 11.81180 5 33 17.35 +22 34 19.6 16 " 12.53843 5 32 42.26 +22 34 37.3 Kojima 12.54076 5 32 42.23 +22 34 38.2 Kobayashi Y. Kushida and O. Muramatsu (Yatsugatake South Base Observatory). 0.25-m f/3.4 reflector. Comet diffuse with central condensation; coma diameter about 1'-2'. IAUC 5903 S. Nakano, Sumoto, Japan, provides the following preliminary parabolic orbital elements. It is possible that this is a short-period comet. T = 1994 Nov. 26.155 TT Peri. = 117.137 Node = 86.164 2000.0 q = 1.13471 AU Incl. = 10.148 1993/94 R. A. (2000) Decl. Delta r Elong. Phase m1 Dec 19 5 27.34 +22 36.9 3.537 4.518 175.2 1.0 15.8 24 5 23.12 +22 38.4 3.499 4.469 169.2 2.4 15.7 29 5 18.91 +22 39.6 3.469 4.419 163.2 3.7 15.7 Jan. 3 5 14.80 +22 40.6 3.446 4.369 157.1 5.0 15.6 8 5 10.85 +22 41.6 3.432 4.319 151.1 6.3 15.5 13 5 07.14 +22 42.5 3.424 4.269 145.2 7.6 15.5 18 5 03.72 +22 43.6 3.423 4.218 139.3 8.7 15.4 IAUC 5904 LL ANDROMEDAE Further to the note on E795, Brian Manning, Stakenbridge, UK has secured a precise position for this object: RA 00h39m11.90s DEC +26 20'54.9" [1950] Taichi Kato, Japan e-mails: "Three nights' V-band CCD photometry at Ouda revealed that this obscure dwarf nova definitely belongs to SU UMa-type. The object is likely to be developing its full superhumps. The hump amplitude is still very small (~0.04 ~ 0.08 mag), but is characterized by rather sharp minima and broad (initially doubly peaked) maxima. The times of mimima have been successfully expressed by a single period as indicated by the following O-C table. Min.UT E O-C 9.379 0 -0.003 9.439 1 0.000 9.498 2 0.002 11.434 36 -0.000 11.492 37 0.001 11.550 38 0.002 12.403 53 -0.000 12.458 54 -0.002 12.518 55 0.001 12.574 56 -0.000 O-C's are calculated by the formula: Min.UT = 9.382 + 0.057006 E The short period is really remarkable. The period is actually shorter than the superhump period of WZ Sge itself! (0.05714 day). It thus appears this belongs to the WZ Sge class of variables."