Central Bureau for Astronomical Telegrams
IAUC 6047: JUPITER AND 1993e; N Sgr 1994 No. 2; 1994f
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Circular No. 6047
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)
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JUPITER AND COMET 1993e
D. P. Smits, J. F. H. Quick, and G. D. Nicolson, Hartebeesthoek
Radio Astronomy Observatory (HRAO), Johannesburg, report: "Jupiter's
decimetric radiation is being monitored using HRAO's 26-m dish at
wavelengths of 18 (left circular polarization), 13 (right circular
polarization), 6 (linear east-west polarization), and 3.6 cm (right
circular polarization). Observations commenced about 2 weeks prior
to the first impact, and between July 16 and 22, horizon-to-horizon
runs were obtained on most days. A steady flux-density increase was
seen at all wavelengths during the impacts but is now decreasing.
The peak increase in flux density at the four wavelengths were about
0.2 Jy at 3.6 cm, 0.7 Jy at 6 cm, 0.8 Jy at 13 cm, and 0.9 Jy at 18
cm, corresponding to increases of 1, 10, 23, and 26 percent,
respectively. Closely-spaced observations at 3.6 and 6 cm about the
times of impact of fragments Q1, S, and T failed to show any changes
in flux above 0.3 Jy."
A. Barucci, M. Roos, M. Fulchignoni, J. Lecacheux, J.
Crovisier, P. Drossart, and F. Roques, Paris-Meudon Observatory,
write: "Using the Telescope Bernard Lyot (+ spectrometer MUSICOS) at
Pic-du-Midi, we have detected several emission lines on Jupiter
about 35 min after the impact of fragment L, between July 19.946 and
19.953 UT. The spectrum (range 546-875 nm, resolving power 36 000)
exhibits strong emission lines of Na (589.0 and 589.6 nm), Li (670.8
nm), and K (766.5 nm). These emissions have almost disappeared in a
spectrum recorded 30 min later. The emission lines of Na and K are
also detected with the impact of comet fragment Q1 on July 20.85."
NOVA SAGITTARII 1994 No. 2
Visual magnitude estimates (cf. IAUC} 5998): June 17.55 UT,
8.0 (W. Albrecht, Pahala, HI); July 7.96, 10.8 (R. Szabo, Ajka,
Hungary); 28.58, 10.3 (N. Makiguchi, Kanagawa, Japan); Aug. 3.46,
8.5 (Makiguchi); 4.22, 9.1 (W. G. Dillon, Missouri City, TX).
COMET TAKAMIZAWA-LEVY (1994f)
Total visual magnitude estimates: July 10.28 UT, 10.3 (C. E.
Spratt, Victoria, BC, 0.20-m reflector); 15.29, 10.8 (Spratt);
29.85, 12.0 (H. Mikuz, Ljubljana, Slovenia, 0.20-m Baker-Schmidt
camera + V filter + CCD).
1994 August 5 (6047) Daniel W. E. Green
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