------------------------------------------------------------------- THE ASTRONOMER Electronic Circular No 2667 2010 Aug 20 11.42UT 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 ------------------------------------------------------------------- LKHA 188 G4: POSSIBLE NEW FU-ORI STAR IN NGC 7000 E. Semkov, S. Peneva (Institute of Astronomy, Sofia, Bulgaria)report on The Astronomer's Telegram 2801 the discovery of a strong outburst in the region of NGC 7000/IC 5070. A source of the outburst seems to be a T Tauri star located in the dark clouds between North American and Pelican Nebulae. The first designation of this object LkHA 188 G4 is given by Cohen and Kuhi (1979). The star is a member of a small group of H alpha emission stars around LkHA 188. The object is included in the Catalog of emission-line stars of the Orion population (Herbig et al. 1988) with the designation HBC 722. According to SIMBAD Astronomical Database the coordinates of the star are: 20 58 17.03 +43 53 43.4 (2000). The results from their photometric observations indicate that for a period of about three months (from 2010 May 13 to 2010 August 16) the star brightness increased by 3.3 mag. (R). At the same time the star has become considerably bluer. The V-R index decreased from 0.65 mag. (May) to 0.45 mag. (August). The photometric data from the period 6-16 August 2010 suggest that the star brightness rises continuously by approximately 0.04 mag. per day. Photometric observations of 2010 Aug 16 gave: R=13.33 and V=13.77. Having in mind the rapid increase in brightness, it is assumed that the observed outburst is from FU-Ori type object. Such a rapid increase in brightness is observed in cases of FU Ori and V1057 Cyg. But an outburst from EXor type or an object similar to V1647 Ori are also possible. SUPERNOVA 2010gg IN ESO 602-25 Discovery by the CHASE Project of a possible supernova (CBET 2371): SN 2010 UT R.A. (2000.0) Decl. Mag. Offset 2010gg Jly 12.31 22 31 25.47 -19 01 54.8 17.7 0.1"E, 9.5"N SUPERNOVA 2010gh IN IC 4523 Discovery by the CHASE Project of a possible supernova (CBET 2372): SN 2010 UT R.A. (2000.0) Decl. Mag. Offset 2010gh Jly 13.03 15 05 13.46 -43 30 59.6 16.9 31.9"E, 25.8"S SUPERNOVA 2010gi IN IC 4660 Discovery by Masaki Tsuboi, Japan of a possible supernova (CBET 2376): SN 2010 UT R.A. (2000.0) Decl. Mag. Offset 2010gi Jly 18.51 17 21 46.1 +75 50 45.4 15.3 3.2"E, 10.6"S Guy M Hurst