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Comet C/2015 K1 (MASTER)статья
- Авторы: Lipunov, Maury M.;., Soulier A.;., Noel J.F ;, Jacques T.;., Pimentel C.;., Barros E.;., J
- Журнал: Central Bureau Electronic Telegrams
- Том: 4105
- Год издания: 2015
- Первая страница: 1
- DOI: 100/CBET004105.txt
- Аннотация: http://www.cbat.eps.harvard.edu/iau/cbet/004100/CBET004105.txt Electronic Telegram No. 4105 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION CBAT Director: Daniel W. E. Green; Hoffman Lab 209; Harvard University; 20 Oxford St.; Cambridge, MA 02138; U.S.A. e-mail: cbatiau@eps.harvard.edu (alternate cbat@iau.org) URL http://www.cbat.eps.harvard.edu/index.html Prepared using the Tamkin Foundation Computer Network COMET C/2015 K1 (MASTER) Vladimir M. Lipunov, Sternberg Astronomical Institute, Lomonosov Moscow State University; David Buckley, South African Astronomical Observatory (SAAO); and Denis Denisenko, Sternberg Astronomical Institute, Moscow State University, report the discovery of a comet with a coma diameter of about 14", elongated toward the west, on 60-s unfiltered survey images taken with the "Mobile Astronomical System of the Telescope-Robots" (MASTER) auto-detection system (double 0.40-m f/2.5 reflector) at the SAAO (discovery observations are tabulated below). The object was flagged by the auto-detection software as one of 30-50 candidates that might be real moving objects from that night (May 16/17 UT) for manual checking; after checking about 25 candidates, most of which were noise on images, Denisenko found that this particular object appeared real with a diffuse appearance, noting it to be a possible comet with a coma diameter of about 14", he notified the Central Bureau, the Minor Planet Center, and other observers. The three discovery images are posted at URL http://master.sai.msu.ru/static/comets/M504DRx-MASTER-SAAO-anim.gif. 2015 UT R.A. (2000) Decl. Mag. May 17.14003 0 19 57.82 - 6 59 49.1 16.3 17.14443 0 19 58.05 - 6 59 46.7 16.5 17.14885 0 19 58.30 - 6 59 44.6 16.6 18.13711 0 20 51.76 - 6 50 35.9 16.6 18.13853 0 20 51.67 - 6 50 35.1 16.9 18.14029 0 20 51.91 - 6 50 32.8 16.3 18.14098 0 20 51.98 - 6 50 33.3 16.2 After the object was posted on the MPC's PCCP webpage, other CCD astrometrists also have commented on the object's cometary appearance. A. Maury and J.-F. Soulier find that images taken on May 20.4 UT with a 0.4-m f/8 Ritchey-Chretien reflector at San Pedro de Atacama, Chile, show a 28" coma and a 45" diffuse tail spanning p.a. 195-260 deg (strongest tail at p.a. 230 deg); Maury and T. Noel obtained follow-up images on May 22.34-22.37 that show a 20" coma. C. Jacques, E. Pimentel, and J. Barros obtained three stacked 60-s images on May 22.3 with a 0.45-m f/2.9 reflector at the SONEAR Observatory, Oliveira, Brazil, that show a condensed coma 30" in diameter. The available astrometry, the following preliminary parabolic orbital elements by G. V. Williams, and an ephemeris appear on MPEC 2015-K70. T = 2014 Oct. 15.5449 TT Peri. = 281.6804 Node = 5.3263 2000.0 q = 2.608532 AU Incl. = 29.2996 NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2015 CBAT 2015 May 23 (CBET 4105) Daniel W. E. Green
- Добавил в систему: Липунов Владимир Михайлович