[IAUC] CBET 4213: 20151206 : COMET C/2015 X2 (CATALINA)
quai en eps.harvard.edu
quai en eps.harvard.edu
Sab Dic 5 19:49:00 ART 2015
Electronic Telegram No. 4213
Central Bureau for Astronomical Telegrams
Mailing address: Hoffman Lab 209; Harvard University;
20 Oxford St.; Cambridge, MA 02138; U.S.A.
e-mail: cbatiau en eps.harvard.edu (alternate cbat en iau.org)
URL http://www.cbat.eps.harvard.edu/index.html
Prepared using the Tamkin Foundation Computer Network
COMET C/2015 X2 (CATALINA)
An apparently asteroidal object reported to the Minor Planet Center on
CCD images taken by E. J. Christensen and G. J. Leonard with the Catalina
0.68-m Schmidt telescope (discovery observations tabulated below) has been
found to show cometary appearance by CCD astrometrists elsewhere after the
object was posted on the Minor Planet Center's NEOCP and PCCP webpages.
2015 UT R.A. (2000) Decl. Mag. Observer
Dec. 2.47232 11 22 55.69 +49 39 47.1 19.5 Christensen
2.47835 11 22 57.06 +49 40 01.4 20.0 "
2.48437 11 22 58.65 +49 40 15.8 19.9 "
2.49040 11 23 00.09 +49 40 25.6 19.8 "
2.51897 11 23 07.34 +49 41 36.6 19.6 "
2.52023 11 23 07.45 +49 41 38.1 19.6 "
2.52149 11 23 08.01 +49 41 40.6 "
G. Hug (Scranton, KS, U.S.A.) writes that his CCD images taken on Dec. 3.4
UT with a 0.56-m reflector show a possible short, bright tail extending
for about 10"-15" in p.a. 285 deg, while additional images taken on Dec.
4.42-4.48 show a faint extension 10" long in p.a. about 280 deg. V-band
images taken by W. H. Ryan and E. V. Ryan with the Magdalena Ridge
Observatory 2.4-m f/8.9 reflector on Dec. 3.44-3.46 show a faint, wide
tail in p.a. about 315 deg. H. Sato, Tokyo, Japan, notes that twentry-four
45-s stacked exposures taken on Dec. 4.5 with an iTelescope 0.43-m f/6.8
astrograph (+ luminance filter) near Mayhill, NM, USA, show a moderately
consensed coma 8" in diameter with no tail; the w-band magnitude was 20.6
as measured within a circular aperture of radius 5".7. J.-F. Soulier
obtained unfiltered images with a 0.30-m f/3.8 Newtonian reflector at
Maisoncelles, France, on Dec. 5.0 that show a 12" coma and a possible tail
21" long in p.a. 295 deg; he measured red mag 19.4-19.6 in a 9".7-radius
aperture.
The available astrometry, the following preliminary parabolic orbital
elements by G. V. Williams, and an ephemeris appear on MPEC 2015-X59.
T = 2015 Dec. 19.0745 TT Peri. = 41.4018
Node = 101.8020 2000.0
q = 1.931690 AU Incl. = 72.9666
NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
superseded by text appearing later in the printed IAU Circulars.
(C) Copyright 2015 CBAT
2015 December 6 (CBET 4213) Daniel W. E. Green
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