Central Bureau for Astronomical Telegrams
IAUC 6707: C/1997 O1
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Circular No. 6707
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
BMARSDEN@CFA.HARVARD.EDU or DGREEN@CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/cfa/ps/cbat.html
Phone 617-495-7244/7440/7444 (for emergency use only)
COMET C/1997 O1 (TILBROOK)
A. Beresford informs us that he reported the name of the comet's
discoverer incorrectly (cf. IAUC 6705): it should be Justin Tilbrook. There
was also an error in the observed R.A.: for 12 28.4 read 12 18.4.
Further precise CCD positions have been reported as follows:
1997 UT R.A. (2000) Decl. Observer
July 24.37582 12 22 55.43 -17 16 25.2 Garradd
24.37768 12 22 55.68 -17 16 19.4 "
24.37955 12 22 55.93 -17 16 13.9 "
24.47205 12 23 08.67 -17 11 32.7 Abe
24.47899 12 23 09.58 -17 11 10.5 "
24.48247 12 23 09.99 -17 11 00.7 "
24.49269 12 23 11.29 -17 10 20.7 Garradd
24.49353 12 23 11.43 -17 10 19.1 "
G. J. Garradd (Loomerah). 0.25-m f/4.1 reflector.
H. Abe (Yatsuka). 0.26-m f/6.0 reflector. Communicated by S. Nakano.
Parabolic orbital elements from 15 observations July 23-24:
T = 1997 July 16.560 TT Peri. = 339.104
Node = 231.329 2000.0
q = 1.38550 AU Incl. = 114.115
1997 TT R. A. (2000) Decl. Delta r Elong. Phase m1
July 23 12 19.72 -18 29.6 1.302 1.389 72.4 44.2 10.0
25 12 24.34 -16 44.4 1.344 1.391 70.7 43.6 10.1
27 12 28.70 -15 06.0 1.386 1.394 69.0 42.9 10.2
29 12 32.84 -13 34.0 1.429 1.397 67.3 42.1 10.2
31 12 36.77 -12 07.9 1.473 1.401 65.6 41.3 10.3
Aug. 2 12 40.53 -10 47.2 1.517 1.406 63.9 40.4 10.4
4 12 44.14 - 9 31.5 1.561 1.411 62.3 39.5 10.5
6 12 47.60 - 8 20.5 1.605 1.417 60.6 38.6 10.5
8 12 50.94 - 7 13.7 1.650 1.424 59.0 37.6 10.6
10 12 54.17 - 6 10.9 1.694 1.431 57.4 36.7 10.7
12 12 57.30 - 5 11.6 1.737 1.438 55.8 35.7 10.8
14 13 00.35 - 4 15.6 1.781 1.446 54.3 34.7 10.9
16 13 03.31 - 3 22.7 1.824 1.455 52.7 33.6 10.9
18 13 06.20 - 2 32.5 1.867 1.464 51.2 32.6 11.0
20 13 09.03 - 1 44.9 1.909 1.473 49.7 31.6 11.1
(C) Copyright 1997 CBAT
1997 July 24 (6707) Brian G. Marsden
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