------------------------------------------------------------------- THE ASTRONOMER Electronic Circular No 1419 1999 Jun 19 14.49UT 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 ------------------------------------------------------------------- SUPERNOVA 1999cm IN UGC 9766 T. Puckett and I. Siegert, Mountain Town, GA, report the discovery of an apparent supernova (mag 17.1) on an unfiltered CCD frame (limiting mag 20.5) taken with the Puckett Observatory 0.60-m automated supernova patrol telescope on June 5.48 UT. SN 1999cm is located at R.A. = 15h11m19s.18, Decl. = +61o07'11".4 (2000), which is 1".0 east and 15".1 south of the centre of UGC 9766. The new object was also present on an unfiltered CCD frame taken on June 6.49, but it does not appear on a Palomar Sky Survey image taken on 1953 June 15 (limiting mag about 20.9). IAUC 7190 COMET C/1999 L2 (LINEAR) M. Elowitz and F. Shelly have reported the discovery of a comet with a coma but no distinct tail in LINEAR data. In response to posting on The NEO Confirmation Page, G. R. Viscome (Lake Placid, NY) reports that the object shows a 16" coma and moderately strong condensation, but again no discernible tail. 1999 UT R.A. (2000) Decl. Mag. Observer June 11.24296 16 35 06.96 +15 25 47.4 18.6 LINEAR 11.25596 16 35 06.01 +15 25 23.6 18.9 " 12.19718 16 33 58.91 +14 57 15.5 16.5 Viscome IAUC 7199 (extract) Orbital elements/ephemeris: T = 1999 Aug. 5.335 TT Peri. = 179.055 Node = 94.302 2000.0 q = 1.90018 AU Incl. = 43.911 1999 TT R. A. (2000) Decl. Delta r Elong. Phase m1 June 11 16 35.40 +15 33.0 1.133 2.021 140.2 18.8 16.3 16 16 29.54 +12 57.2 1.111 2.000 140.3 18.9 16.2 21 16 23.95 +10 04.1 1.096 1.982 139.5 19.4 16.2 26 16 18.83 + 6 56.5 1.088 1.965 138.1 20.2 16.1 July 1 16 14.34 + 3 37.8 1.088 1.950 135.9 21.3 16.1 IAUC 7200 COMET C/1999 L3 (LINEAR) An apparently asteroidal fast-moving LINEAR object, posted on The NEO Confirmation Page, was noted by F. B. Zoltowski, Woomera, S. Australia, as having a tail about 30" long in p.a. 100 deg and a rather dense coma on June 13 and 14 CCD images. P. R. Holvorcem, Valinhos, Brazil, reports a about 10" coma on his June 12 images. The discovery observation is given below, and additional astrometry appears on MPEC 1999-L34. 1999 UT R.A. (2000) Decl. Mag. June 9.17148 13 07 18.98 -26 31 47.8 18.3 Preliminary parabolic orbital elements by B. G. Marsden: T = 1999 Dec. 31.319 TT Peri. = 348.975 Node = 140.019 2000.0 q = 2.09910 AU Incl. = 166.070 1999 TT R. A. (2000) Decl. Delta r Elong. Phase m1 June 11 13 03.66 -25 56.2 2.451 3.126 123.3 15.8 16.9 16 12 54.49 -24 20.9 2.497 3.086 116.4 17.1 16.9 21 12 46.47 -22 49.7 2.551 3.047 109.7 18.3 16.9 26 12 39.55 -21 23.9 2.610 3.009 103.1 19.2 16.9 July 1 12 33.64 -20 04.1 2.673 2.970 96.8 19.9 16.9 Guy M Hurst