Circular No. 7166

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/iau/cbat.html ISSN 0081-0304

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

COMET 1999 J3

An apparently asteroidal object discovered by LINEAR, and noted on The NEO Confirmation Page, has been reported as cometary by Kleť observers. The following CCD observations are available:

1999 UT α_{2000} δ_{2000} m_{1} Observer
May 12.28325 15^{h}49^{m}41.^{s}93 +72^{o}55′22′′.2 18.8 Blythe
12.29285 15 49 38.33 +72 55 41.2 18.6  _{”}
12.31163 15 49 32.55 +72 56 11.7 18.7  _{”}
12.32404 15 49 28.92 +72 56 34.3 18.7  _{”}
13.88516 15 40 48.68 +73 40 46.6 17.7 Tichý
13.89029 15 40 46.57 +73 40 56.4  _{”}
13.89142 15 40 46.43 +73 40 57.8  _{”}

M. Blythe, F. Shelly, M. Bezpalko, and M. Elowitz (Socorro). 1-m f/2.15

LINEAR telescope. Measurers J. Stuart, H. Viggh, and R. Sayer. M. Tichý and Z. Moravec (Kleť). 0.57-m f/5.2 reflector. Comet diffuse with

6′′ coma.

COMET C/1999 H1 (LEE)

Extension to ephemeris on IAUC 7153 (elements MPC 34421):

1999TT α_{2000} δ_{2000} Δ r ϵ β m_{1}
May 22 8^{h}48.^{m}05 − 8^{o}49.^{′}3 0.885 1.198 78.^{o}0 55.^{o}7 7.5
24 8 44.63 − 5 50.9 0.921 1.170 74.3 56.4 7.5
26 8 41.59 − 3 06.5 0.958 1.142 70.8 56.9 7.5
28 8 38.86 − 0 34.9 0.996 1.114 67.3 57.1 7.5
30 8 36.39 + 1 45.0 1.035 1.086 64.0 57.0 7.4
June 1 8 34.13 + 3 54.3 1.075 1.059 60.8 56.7 7.4
3 8 32.05 + 5 54.1 1.115 1.032 57.7 56.2 7.4
5 8 30.11 + 7 45.6 1.155 1.005 54.7 55.5 7.3
7 8 28.28 + 9 29.5 1.196 0.979 51.8 54.5 7.3
9 8 26.53 +11 06.7 1.236 0.954 48.9 53.4 7.3
11 8 24.84 +12 38.0 1.275 0.929 46.1 52.0 7.2
13 8 23.20 +14 04.1 1.314 0.904 43.4 50.5 7.2
15 8 21.58 +15 25.6 1.351 0.881 40.7 48.7 7.1
17 8 19.95 +16 42.9 1.388 0.859 38.0 46.8 7.0
19 8 18.32 +17 56.6 1.423 0.837 35.4 44.7 7.0
21 8 16.66 +19 07.1 1.457 0.817 32.8 42.4 6.9
1999 May 13  \begin{matrix}c \\ ◯ \end{matrix} Copyright 1999 CBAT  Daniel W. E. Green