[IAUC] IAUC 8806: P/2007 C2; P/2007 B3 [25139-2007/05-R1]
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Circular No. 8806
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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Phone 617-495-7440/7244/7444 (for emergency use only)
COMET P/2007 C2 (CATALINA)
An apparent asteroidal object discovered by the Catalina Sky
Survey (discovery observation tabulated below), and posted on the
Minor Planet Center's 'NEOCP' webpage, has been reported by other
observers to show cometary appearance. CCD images taken by H.-C.
Lin, C.-S. Lin, and Q.-z. Ye (Lulin Observatory 0.41-m f/8.8
Ritchey-Chretien telescope) on Feb. 10.55 UT show a small 3" coma
with an apparent tail around 5"-6" long in p.a. 70 deg. G. Sostero
and E. Guido (Remanzacco, Italy, 0.45-m f/4.4 reflector) report
that a co-addition of ten unfiltered 180-s CCD exposures on Feb.
11.8 reveals the possible presence of a broad and faint tail almost
12" toward p.a. 340 deg. D. T. Durig and W. R. O'Farrell (Sewanee,
TN, 0.30-m f/4 Schmidt-Cassegrain telescope) write that their CCD
images from Feb. 12.09-12.16 show a possible coma of diameter 1".5-
3", asymmetric to the north, with a possible tail 7"-9" long in
p.a. 255 deg.
2007 UT R.A. (2000) Decl. Mag.
Feb. 9.13925 3 00 14.90 +22 06 59.9 18.7
The available astrometry (including numerous prediscovery
observations, the oldest being made at Catalina back to 2006 Oct.
19), the following elliptical orbital elements, and an ephemeris
appear on MPEC 2007-C54.
Epoch = 2007 Sept.17.0 TT
T = 2007 Sept. 4.5278 TT Peri. = 179.4398
e = 0.462035 Node = 276.1167 2000.0
q = 3.780116 AU Incl. = 8.6748
a = 7.026700 AU n = 0.0529148 P = 18.626 years
COMET P/2007 B3 (GARRADD)
Additional observations show that this comet (cf. IAUC 8801)
is of short period; orbital elements from MPEC 2007-C37:
T = 2008 Apr. 8.305 TT Peri. = 281.119
e = 0.11751 Node = 327.829 2000.0
q = 4.24543 AU Incl. = 28.825
a = 4.81071 AU n = 0.093409 P = 10.55 years
(C) Copyright 2007 CBAT
2007 February 12 (8806) Daniel W. E. Green
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