Central Bureau for Astronomical Telegrams
IAUC 6022: 1993e; 1994V
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Circular No. 6022
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 SHOEMAKER-LEVY 9 (1993e)
P. W. Chodas and D. K. Yeomans, Jet Propulsion Laboratory,
provide the following "final" predicted jovian impact times:
nucleus A = 21, July 16.833 UT; B = 20, 17.121;
C = 19, 17.293; D = 18, 17.491; E = 17, 17.629; F = 16, 18.020;
G = 15, 18.311; H = 14, 18.810; K = 12, 19.430; L = 11, 19.923;
N = 9, 20.431; P = 8 (= P2 = 8b), 20.633; Q = 7 (= Q1 = 7a), 20.833;
R = 6, 21.226; S = 5, 21.632; T = 4, 21.753; U = 3, 21.909;
V = 2, 22.178; W = 1, 22.332. The uncertainty is now about +/- 0.003 day.
M. Kidger, Instituto de Astrofisica de Canarias, reports that
multiple infrared detections have been made of the impact on Jupiter
of nucleus A = 21, beginning around July 16.845 UT. The
observations were made at 2.2 microns with the Nordic Optical
Telescope (La Palma), at 2.1 microns with the Carlos Sanchez Telescope
and at 2.3 microns with the 3.5-m telescope at Calar Alto. The
observations of a "spot" (about 1 mag fainter than Jupiter I
= Io) at 2.1 and 2.2 microns lasted until about July 16.854, and the
2.3-micron detection continued beyond July 16.875.
Kidger stresses that there was no visible detection of the impact in
the methane bands near 613 and 892 nm.
Word of the 2.3-micron detection, described as a plume at about the
nominal position of the limb, was also received via the SL9 message
center at the University of Maryland. It also appears that the
plume was observed at 10 microns with the 3.6-m telescope
at the European Southern Observatory.
Corrigenda. On IAUC 6019, line 7, for 0.1-0.4 mag read 0.1 mag;
line 13, for 0.8-0.9 mag read 0.3 mag; line 14, for 0.4 mag read 0.1 mag.
SUPERNOVA 1994V IN MCG-03-38-025
R. H. McNaught, Anglo-Australian Observatory reports his discovery
of a supernova (mag about I = 17) on a plate taken on July 14 by Q. A.
Parker with the U.K. Schmidt Telescope. The supernova is at R.A. =
14 51 52.34, Decl. = -17 12 33.5 (equinox 1950.0; uncertainty 0".3
in R.A., 0".9 in Decl.), offset 2".6 west and 21".9 south of the
center of MCG-03-38-025 = IRAS 14518-1712. The supernova was about
0.5 mag brighter on I plates taken with the same telescope by M. Hartley
on June 13 and 15, but it does not appear to a limit of R = 22 on a
plate by Hartley on March 10 and on several earlier J, R and I plates.
A star of magnitude about I = 16 (position end figures 51.98, 31.8),
is situated only 5" from the supernova.
1994 July 16 (6022) Brian G. Marsden
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