------------------------------------------------------------------- THE ASTRONOMER Electronic Circular No 2399 2007 Dec 09 14.52UT 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 Backup: gmh@wdcc1.bnsc.rl.ac.uk WORLD WIDE WEB http://www.theastronomer.org ------------------------------------------------------------------- THIRTEEN NEW METEOR SHOWERS RECOGNISED P. Brown et. al., University of Western Ontario, have contributed thirteen new meteor showers to the IAU Meteor Shower Working List, based on results from five years of observations by the Canadian Meteor Orbit Radar according to CBET 1142 P. Jenniskens comments that the table has: solar longitude, R.A., and Decl. are given in degrees for equinox 2000.0 V_g is the geocentric speed of the meteoroid at the earth, but outside the earth's gravitational field the span over which the shower is active in degrees of solar longitude d_RA and d_Dec are the drifts in the radiant position (in R.A. and Decl., respectively) for every advance of one degree of solar longitude. Solar No. Meteor-shower long. R.A. Decl. V_g Span d_RA d_Dec 319 January Leonids 282.5 148.3 +23.9 52.7 280-284 0.66 -0.14 320 omega Serpentids 275.5 242.7 + 0.5 38.9 271-279 0.76 +0.11 321 theta Cor Bor 296.5 232.3 +35.8 38.7 293-303 0.70 -0.06 322 lambda Bootids 295.5 219.6 +43.2 41.8 285-297 0.88 -0.69 323 xi Cor Borealids 294.5 244.8 +31.1 44.3 291-303 0.69 -0.11 324 epsilon Perseids 95.5 58.2 +37.9 44.8 92-107 0.78 +0.15 325 Daytime lambda Tau 85.5 56.7 +11.5 36.4 70- 98 0.82 +0.27 326 epsilon Pegasids 105.5 326.3 +14.7 29.9 104-106 1.50 +0.45 327 beta Equuleids 106.5 321.5 + 8.7 31.6 104-112 0.69 -0.28 328 alpha Lacertids 105.5 343.0 +49.6 38.9 102-110 0.70 +0.37 329 Daytime kappa Leo 182.5 161.5 +15.4 43.3 171-193 0.55 -0.26 330 sigma Serpentids 275.5 242.8 - 0.1 42.7 261-279 0.75 -0.14 331 alpha Hydrids 285.5 127.6 - 7.9 43.6 281-289 0.65 -0.17 A new group name was also added: the "Bootid-Coronae Borealid" Complex, which includes the theta Coronae Borealids, the lambda Bootids, and the xi Coronae Borealids. See: http://www.ta3.sk/IAUC22DB/MDC2007/ (8116) JEANPERRIN D. Higgins, Canberra, Australia et. al., report on CBET 1127 that photometric observations obtained during 2007 Oct. 4-Nov. 7 reveal that minor planet (8116) is a binary system with an orbital period of 36.15 +/- 0.02 hr. The primary shows a period of 3.6169 +/- 0.0002 hr, and it has a light curve amplitude of 0.09 mag, suggesting a nearly spheroidal shape. SUPERNOVA 2007qe IN ANONYMOUS GALAXY Discovery by ROTSE and Nearby Supernova Factory collaborations of a possible supernova (CBET 1138): SN 2007 UT R.A. (2000.0) Decl. Mag. Offset 2007qe Nov 13.17 23 54 12.98 +27 24 33.4 17.4 11.9"E 1.1"N A spectrum indicates it is a young type-Ia supernova. SUPERNOVAE 2007qf-2007ra The Sloan Digital Sky Survey II collaboration, have reported on CBET 1139 the discovery of twenty-two supernovae, designated as above and all fainter than magnitude 19.0. SUPERNOVA 2007rb IN NGC 2889 Discovery by D. Madison and W. Li of a possible supernova (CBET 1140): SN 2007 UT R.A. (2000.0) Decl. Mag. Offset 2007rb Oct 26.56 09 27 11.58 -11 38 17.7 18.0 14.0"W 18.9"N Guy M Hurst