Circular No. 8917

Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION

Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.

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COMET P/2008 C2 (TICHÝ)

M. Tichý and J. Tichá, Kleť Observatory, report their recovery of comet P/2000 U6 (cf. IAUC 7515) on CCD images obtained on Feb. 3 with the 1.06-m KLENOT Telescope, with Tichý’s astrometric measures given below. They subsequently identified earlier images from Jan. 11.

2008 UT  α_{2000}  δ_{2000}  Mag.
Jan. 11.71410  0^{h}01^{m}07.^{s}90  +0^{o}43′19′′.0
11.71757  0 01 08.19  +0 43 23.9
11.71850  0 01 08.28  +0 43 24.4  19.4
Feb. 3.72580  0 37 04.11  +7 11 10.3
3.72688  0 37 04.24  +7 11 11.7  18.8
3.72888  0 37 04.42  +7 11 13.3
3.73073  0 37 04.68  +7 11 14.7
3.73153  0 37 04.79  +7 11 15.4
3.73352  0 37 04.87  +7 11 17.2
3.73463  0 37 05.06  +7 11 19.3  18.6
3.73748  0 37 05.30  +7 11 21.6
3.73848  0 37 05.48  +7 11 23.8
3.73950  0 37 05.58  +7 11 23.7
3.74552  0 37 06.07  +7 11 29.3

The indicated correction to the prediction on MPC 54167 is ΔT = −0.16 day. The following orbital elements by B. G. Marsden are from 211 observations, 2000–2008 (mean residual 0′′.6).

Epoch = 2000 Oct. 23.0 TT

T = 2000 Oct. 4.6044 TT  ω = 11.^{o}8524
e = 0.431372  Ω = 24.4340 }2000.0
q = 2.154867 AU  i = 19.3690

a = 3.789587 AU n^{o} = 0.1336030 P = 7.38 years

Epoch = 2008 Feb. 24.0 TT

T = 2008 Feb. 7.1544 TT  ω = 11.^{o}7159
e = 0.433828  Ω = 24.3420 }2000.0
q = 2.137870 AU  i = 19.3785

a = 3.776006 AU n^{o} = 0.1343244 P = 7.34 years

2008 February 5  \begin{matrix}c \\ ◯ \end{matrix} Copyright 2008 CBAT  Daniel W. E. Green