[IAUC] IAUC 8885: P/2007 U2 [25139-2008/05-R1]
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Lun Oct 22 16:25:43 ART 2007
Circular No. 8885
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 U2 (LINEAR-NEAT)
K. Sarneczky and L. L. Kiss report their recovery of comet
P/2001 Q5 (cf. IAUC 7697) on R-band CCD images obtained with the
2.3-m reflector at Siding Spring (astrometry tabulated below).
Coma diameters and tail lengths: Oct. 21.5 UT, 3", 6" in p.a. 95
deg (co-added 300-s image); 22.4, 3", 8" in p.a. 90 deg (co-added
180-s image).
2007 UT R.A. (2000) Decl. Mag.
Oct. 21.44897 18 34 35.78 -28 52 24.9 19.8
21.45048 18 34 35.98 -28 52 23.9
21.45199 18 34 36.14 -28 52 23.5
21.45350 18 34 36.29 -28 52 22.9
22.39249 18 36 15.32 -28 46 59.9
22.40073 18 36 16.17 -28 46 57.2 19.7
22.40629 18 36 16.77 -28 46 55.3
22.41352 18 36 17.49 -28 46 52.5
22.41704 18 36 17.89 -28 46 51.4
The indicated correction to the prediction on MPC 54167 is Delta(T)
= -0.5 day. The following orbital elements by B. G. Marsden are
from 234 observations, 2001-2007 (mean residual 0".7); the
ephemeris uses H_10 = 14.0.
Epoch = 2001 June 20.0 TT
T = 2001 June 11.6210 TT Peri. = 6.3996
e = 0.416559 Node = 336.2663 2000.0
q = 2.043148 AU Incl. = 10.9448
a = 3.501896 AU n = 0.1504005 P = 6.553 years
Epoch = 2008 Feb. 24.0 TT
T = 2008 Feb. 20.4955 TT Peri. = 8.2860
e = 0.395943 Node = 335.2570 2000.0
q = 2.155746 AU Incl. = 10.7041
a = 3.568779 AU n = 0.1461923 P = 6.742 years
2007 TT R. A. (2000) Decl. Delta r Elong. Phase Mag.
Oct. 17 18 26.93 -29 17.3 2.433 2.342 72.9 24.0 19.6
27 18 44.50 -28 19.9 2.518 2.316 66.8 23.2 19.7
Nov. 6 19 03.13 -27 16.2 2.600 2.291 61.1 22.3 19.7
16 19 22.62 -26 04.8 2.677 2.268 55.5 21.1 19.7
26 19 42.75 -24 44.7 2.748 2.246 50.1 19.7 19.7
Dec. 6 20 03.33 -23 15.4 2.815 2.227 44.8 18.2 19.7
16 20 24.21 -21 36.3 2.876 2.210 39.7 16.5 19.7
26 20 45.24 -19 47.5 2.931 2.195 34.8 14.8 19.7
(C) Copyright 2007 CBAT
2007 October 22 (8885) Daniel W. E. Green
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