Circular No. 7168

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)

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Phone 617-495-7244/7440/7444 (for emergency use only)

COMET C/1999 J3 (LINEAR)

The following additional precise CCD observations have been reported:

1999 UT α_{2000} δ_{2000} m_{1} Observer
May 14.13090 15^{h}39^{m}22.^{s}13 +73^{o}47′31′′.6 16.8 DeGraff
14.14063 15 39 18.73 +73 47 47.6 17.0  _{”}
14.69829 15 35 57.32 +74 02 52.6 17.8 Oribe
14.70523 15 35 54.86 +74 03 03.1  _{”}
14.71461 15 35 51.30 +74 03 19.0  _{”}

D. R. DeGraff (Stull Observatory). 0.81-m f/4 reflector. T. Oribe (Saji Observatory). 1.03-m f/4.2 reflector. Hint of tail to the

southwest; 10′′ coma. Communicated by S. Nakano, Sumoto, Japan.

Preliminary parabolic orbital elements by the undersigned from 11 observations, May 12–14:

T = 1999 Sept.23.675 TT  ω = 154.^{o}749
Ω = 230.487 }2000.0
q = 1.14768 AU  i = 102.370
1999TT α_{2000}  δ_{2000}  Δ  r  ϵ  β  m_{1}
May 12 15^{h}51.^{m}2 +72^{o}47.^{′}0 2.077 2.294 89.^{o}0 26.^{o}1 17.2
14 15 40.1 +73 43.9 2.075 2.272 87.7 26.4 17.1
16 15 27.7 +74 36.7 2.073 2.249 86.4 26.7 17.1
18 15 13.9 +75 25.0 2.071 2.226 85.1 26.9 17.1
20 14 58.7 +76 08.2 2.071 2.204 83.8 27.2 17.0
22 14 42.0 +76 45.8 2.071 2.181 82.4 27.4 17.0
24 14 24.0 +77 17.4 2.071 2.158 81.0 27.6 16.9
26 14 04.8 +77 42.6 2.072 2.136 79.6 27.8 16.9
28 13 44.8 +78 01.1 2.073 2.113 78.2 28.0 16.8
30 13 24.3 +78 12.7 2.074 2.090 76.8 28.2 16.8
June 1 13 03.7 +78 17.5 2.075 2.068 75.4 28.3 16.7
3 12 43.4 +78 15.9 2.077 2.045 74.0 28.5 16.7
5 12 23.9 +78 08.1 2.079 2.023 72.6 28.6 16.6
7 12 05.4 +77 54.9 2.081 2.000 71.2 28.7 16.6
9 11 48.1 +77 36.8 2.082 1.978 69.9 28.8 16.6
11 11 32.2 +77 14.6 2.084 1.955 68.5 28.9 16.5

1999 May 14  \begin{matrix}c \\ ◯ \end{matrix} Copyright 1999 CBAT  Daniel W. E. Green