[IAUC] IAUC 8794: C/2007 A2; C/2006 P1; 2007D, 2007E, 2007F [25139-2007/05-R1]
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Vie Jun 22 17:02:15 ART 2007
Circular No. 8794
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 C/2007 A2 (CHRISTENSEN)
E. J. Christensen reports the discovery of a comet on CCD
images taken through light cirrus clouds with the 1.5-m reflector
in the course of the Mt. Lemmon Survey, noting a moderately
condensed 5" coma and an 8" tail toward p.a. 300 deg (description
from four 30-s co-added images).
2007 UT R.A. (2000) Decl. Mag.
Jan. 10.41205 9 01 08.39 +13 28 58.1 19.4
The reported astrometry, the following very preliminary parabolic
orbital elements, and an ephemeris appear on MPEC 2006-A46.
T = 2007 July 8.036 TT Peri. = 226.013
Node = 304.395 2000.0
q = 3.06166 AU Incl. = 40.974
COMET C/2006 P1 (McNAUGHT)
Visual total-magnitude and tail-length estimates made in
daylight: Jan. 12.84 UT, -3.9, short (D. W. E. Green, Cambridge,
MA, U.S.A., 20x80 binoc.); 12.91, -4.5, 0.1 deg (J. Bortle,
Stormville, NY, 10x50 binoc.); 12.91, -4.1, about 0.5 deg (C. S.
Morris, Fillmore, CA, U.S.A., 20x80 binoc.).
SUPERNOVAE 2007D, 2007E, 2007F
Three apparent supernovae have been discovered on unfiltered
CCD frames: 2007E by N. Joubert and W. Li (LOSS/KAIT; cf. IAUC
8792); and the others by T. Puckett (2007D with T. Orff, and 2007F
with R. Gagliano; cf. IAUC 8792; 0.35-m reflector at Ellijay, GA).
SN 2007 UT R.A. (2000.0) Decl. Mag. Offset
2007D Jan. 9.02 3 18 38.71 +37 36 26.4 18.2 4".9 E, 2".8 S
2007E Jan. 10.17 2 26 34.41 -15 50 36.5 15.9 15".7 E, 14".2 N
2007F Jan. 11.40 13 03 15.08 +50 37 07.7 17.3 10".1 W, 7".4 S
Additional magnitudes for 2007D in UGC 2653: 2005 Dec. 6, [19.4;
2007 Jan. 11.07, 17.9. Additional KAIT magnitudes for 2007E in NGC
921: 2006 Dec. 7.16, [18.2; 2007 Jan. 12.13, 16.0. Additional
magnitudes for 2007F in UGC 8162: 2005 Dec. 16, [19.8 (Puckett);
2007 Jan. 12.27, 16.8 (A. Sehgal, Osoyoos, BC, Canada, 0.50-m
reflector).
(C) Copyright 2006 CBAT
2007 January 12 (8794) Daniel W. E. Green
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