Circular No. 5667

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)

PERIODIC COMET KOJIMA (1992z) J. V. Scotti reports his recovery of this comet using the Spacewatch

telescope at Kitt Peak. On Dec. 1, the comet was essentially stellar with a hint of extended size. The indicated correction to the prediction on MPC 18256 (ephemeris on MPC 21280) is ΔT = –0.05 day.

1992 UT  α_{2000}  δ_{2000}  m_{1}
Oct. 21.40510  2^{h}30^{m}07.^{s}03  +13^{o}41′28′′.8  22.1
21.41361  2 30 06.67  +13 41 27.3  21.5
21.42554  2 30 06.24  +13 41 26.0  22.4
Dec. 1.12069  2 03 21.13  +11 24 30.8  20.7
1.13420  2 03 20.78  +11 24 28.8  22.6
1.14581  2 03 20.47  +11 24 26.3  21.7
1.15768  2 03 20.00  +11 24 25.6  21.0

COMET SHOEMAKER (1992y)

Orbital elements by B. G. Marsden from MPC 21236:

T = 1993 Mar. 25.663 TT  ω = 54.^{o}859
Ω = 55.300 }2000.0
q = 2.31384 AU  i = 65.994
1992 /93 α_{2000}  δ_{2000}  Δ  r  ϵ  β  m_{1}
Dec. 4 3^{h}03.^{m}79 +38^{o}30.^{′}3 1.711 2.629 153.^{o}3 9.^{o}7 13.9
14 2 39.45 +40 47.8 1.739 2.579 140.9 13.9 13.8
24 2 17.89 +42 33.6 1.799 2.532 128.6 17.7 13.8
Jan. 3 2 00.76 +43 57.7 1.882 2.489 117.1 20.6 13.8
13 1 48.65 +45 12.4 1.979 2.450 106.7 22.6 13.9
23 1 41.45 +46 27.5 2.083 2.416  97.4 23.8 13.9
Feb. 2 1 38.75 +47 50.1 2.189 2.386  89.1 24.4 14.0
12 1 40.02 +49 24.2 2.290 2.361  81.8 24.4 14.0
22 1 44.86 +51 11.5 2.385 2.341  75.5 24.1 14.1
Mar. 4 1 53.04 +53 12.8 2.471 2.327  70.0 23.6 14.1
14 2 04.51 +55 27.6 2.546 2.318  65.5 23.0 14.2
24 2 19.48 +57 54.5 2.611 2.314  61.8 22.3 14.2
Apr. 3 2 38.49 +60 31.6 2.666 2.316  59.0 21.7 14.3

Total visual magnitude estimate by A. Nakamura, Kuma, Japan (0.60m reflector): Nov. 2.66 UT, 14.6.

1992 December 4 Daniel W. E. Green