Circular No. 5992

Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION

Postal Address: Central Bureau for Astronomical Telegrams Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A. Telephone 617-495-7244/7440/7444 (for emergency use only) TWX 710-320-6842 ASTROGRAM CAM EASYLINK 62794505 MARSDEN@CFA or GREEN@CFA (.SPAN, .BITNET or .HARVARD.EDU)

COMET SHOEMAKER (1994k) The following additional precise positions have been reported:

1994 UT α_{2000} δ_{2000} m_{1} Observer
May 22.22575 17^{h}17^{m}45.^{s}89 −10^{o}18′00′′.8 18.0 di Cicco
22.23167 17 17 45.76 −10 18 02.6 19.0  _{”}
22.23797 17 17 45.46 −10 18 03.0 18.5  _{”}
22.75573 17 17 26.72 −10 20 35.5 16.6 Nakamura
22.76146 17 17 26.51 −10 20 36.5  _{”}

D. di Cicco (Sudbury, MA). 0.28-m Schmidt-Cassegrain + CCD. A. Nakamura (Kuma Kogen, Japan). Communicated by S. Nakano.

The following parabolic orbital elements by B. G. Marsden, from 10 observations (May 14-22), are necessarily indeterminate; it is possible that this comet is of short period.

T = 1994 Jan. 30.087 TT  ω = 84.^{o}124
Ω = 110.880 }2000.0
q = 1.77494 AU  i = 11.288
1994TT α_{2000}  δ_{2000}  Δ  r  ϵ  β  m_{1}
May 18 17^{h}20.^{m}16 − 9^{o}58.^{′}4 1.286 2.238 153.^{o}7 11.^{o}6 16.5
23 17 17.30 −10 21.7 1.303 2.275 158.5  9.4 16.6
28 17 14.15 −10 47.3 1.325 2.313 163.0  7.4 16.8
June 2 17 10.86 −11 14.9 1.354 2.352 166.7  5.7 16.9
7 17 07.56 −11 44.4 1.388 2.392 168.9  4.7 17.0
12 17 04.38 −12 15.1 1.429 2.432 168.5  4.8 17.1
17 17 01.45 −12 46.9 1.475 2.473 165.8  5.8 17.3
22 16 58.87 −13 19.3 1.528 2.514 162.0  7.2 17.4
27 16 56.70 −13 52.0 1.587 2.556 157.6  8.7 17.6

COMET TAKAMIZAWA-LEVY (1994f) Total visual magnitude estimates: Apr. 21.35 UT, 9.6 (J. E. Bortle,

Stormville, NY, 0.32-m reflector); May 9.04, 8.7 (K. Sárneczky, Ráktanya, Hungary, 20×60 binoculars); 12.04, 8.7 (A. Diepvens, Balen, Belgium, 0.15m refractor); 14.35, 8.8 (C. S. Morris, Pine Mountain Club, CA, 20×80 binoculars); 22.25, 8.3 (C. E. Spratt, Victoria, BC, 0.20-m reflector).

1994 May 23 Daniel W. E. Green