ВНИМАНИЕ! На форуме начался конкурс - астрофотография месяца - АВГУСТ!
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Поздравляю! Индекс Икс стал для тебя уже счастливым.
Electronic Telegram No. 4216Central Bureau for Astronomical TelegramsMailing address: 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.htmlPrepared using the Tamkin Foundation Computer NetworkCOMET C/2015 X4 (ELENIN) Leonid Elenin reports his discovery of a diffuse comet with slightcondensation on three CCD images taken with a 0.4-m f/3 astrograph at theISON-NM observatory near Mayhill, NM, USA, on Dec. 3.5 UT (discoveryobservations tabulated below); he noted a coma with diameter about 12" and a15" tail in p.a. 280 deg. 2015 UT R.A. (2000) Decl. Mag. Observer Dec. 3.48520 6 02 39.78 +21 36 39.3 18.2 Elenin 3.49481 6 02 39.41 +21 36 33.5 17.8 " 3.50440 6 02 39.05 +21 36 28.0 18.0 "After the comet was posted on the Minor Planet Center's PCCP webpage, otherCCD astrometrists also noted the object's cometary appearance. Ten stacked60-s images obtained by C. Jacques, E. Pimentel, and J. Barros on Dec. 3.7 UTwith an iTelescope 0.51-m f/4.5 reflector at Siding Spring show a condensedcoma 5" in diameter, elongated 8" towards p.a. 145 deg. H. Sato, Tokyo,Japan, notes that that eight stacked 60-s exposures taken with an iTelescope0.51-m f/6.8 astrograph (+ luminance filter) near Mayhill, NM, U.S.A., onDec. 3.73 show the comet to be strongly consensed with a coma 15" in diameterand a short tail 15" long toward p.a. 280 degrees; the w-band magnitude was16.5 as measured within a circular aperture of radius 8".8. E. Guido,Castellammare di Stabia, Italy, writes that twenty stacked 120-s unfilteredexposures, obtained remotely with an iTelescope 0.32-m f/8 astrograph nearNerpio, Spain, on Dec. 3.9, show a compact coma nearly 8" in diameter (withred mag 17.1-17.2), elongated toward p.a. 120 deg. E. Bryssinck, Kruibeke,Belgium, relates that four stacked 120-s images obtained on Dec. 4.9 with a0.4-m f/3.8 astrograph shows a condensed circular coma 12" across. J.-F.Soulier obtained unfiltered images with a 0.30-m f/3.8 Newtonian reflectorat Maisoncelles, France, on Dec. 4.90-4.95 that show a 13" coma and a tail10" long in p.a. 315 deg. Twenty 2-min exposures taken by D. T. Durig andS. P. Hearn on Dec. 8.23-8.27 with a 0.3-m f/2.5 Schmidt-Cassegrain reflectorat the Cordell-Lorenz Observatory, Sewanee, TN, USA, show a short tail about17" long in p.a. 303 deg. The available astrometry, the following elliptical orbital elements byG. V. Williams, and an ephemeris appear on MPEC 2015-X105. T = 2015 Nov. 2.6423 TT Peri. = 176.1520 e = 0.813430 Node = 262.6351 2000.0 q = 3.393964 AU Incl. = 29.4998 a = 18.191358 AU n = 0.0127030 P = 77.6 yearsNOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2015 CBAT2015 December 8 (CBET 4216) Daniel W. E. Green
Официальный циркуляр CBET
Спасибо! Если мне не изменяет память, то у Гены и Терри по пять комет. Так что Гена его уже догнал.