Central Bureau for Astronomical Telegrams
IAUC 4150: 1985l; KR Aur; 1982i; 1985m
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Circular No. 4150
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
TWX 710-320-6842 ASTROGRAM CAM Telephone 617-495-7244/7440/7444
COMET HARTLEY-GOOD (1985l)
K. R. Bondal, Uttar Pradesh State Observatory, reports that
spectra obtained with the 1-m reflector at Naini Tal on Nov. 22.6,
23.6, and 24.6 UT, using a Hilger and Watts spectrum scanner (
resolution 0.9 nm), reveal tentative identification of the following
emission features: CN (1-0) 358-nm, CN (0-0) 388-nm, CH (0-0) + CE
405-nm, CN (0-1) 420-nm, C2 (2-0) + CH (0-0) 435-nm, C2 (1-0) 470-
nm, C2 (0-0) 516-nm, C2 (0-1) 564-nm, C2 (0-2) 619-nm and Na 589-nm.
Total visual magnitude estimates: Nov. 18.11 UT, 7.5 (C. S.
Morris, near Mt. Wilson, CA, 20x80 binoculars); Dec. 1.08, 6.3 (C.
Spratt, Victoria, BC, 0.20-m reflector); 1.74, 7.1 (J.-C. Merlin,
Le Creusot, France, 0.15-m reflector); 2.73, 7.6 (Merlin); 4.73,
7.8 (Merlin).
KR AURIGAE
R. Ducoty, Capitola, CA, writes that KR Aur has gone into a
low state, as indicated by his visual magnitude estimates: Sept.
11.50 UT, 13.3; Nov. 7.44, 15.0; Dec. 8.39, 14.9.
PERIODIC COMET HALLEY (1982i)
A. Tokunaga reports the following infrared magnitudes obtained
by W. Golisch and himself with the NASA Infrared Telescope Facility
at Mauna Kea on Nov. 28 (the 7"3 aperture was centered on the comet
nucleus): M = 5.9, [8.7 microns] = 1.3, N = 0.5, Q = -1.7. The errors
were +/- 0.1 mag for M and < 0.05 mag for the other magnitudes.
The color temperature of the thermal emission was 260 K.
COMET THIELE (1985m)
Total visual magnitude estimates: Nov. 9.01 UT, 7.7 (J. E.
Bortle, Stormville, NY, 10x50 binoculars); 9.16, 8.1 (C. Spratt,
Victoria, BC, 0.20-m reflector); 10.85, 8.1 (J.-C. Merlin, Le
Creusot, France, 0.15-m reflector); 11.11, 8.0 (Spratt, 0.08-m
refractor); 12.15, 7.9 (Spratt, 11x80 binoculars); 13.14, 7.9
(Spratt, 11x80 binoculars); 13.23, 8.0 (A. Hale, Whitaker Peak, CA,
10x50 binoculars); 14.81, 7.8 (Merlin); 18.28, 8.0 (C. S. Morris,
near Mt. Wilson, CA, 20x80 binoculars); Dec. 1.10, 8.5 (Spratt,
0.20-m reflector); 1.76, 9.0 (Merlin, 0.40-m reflector); 2.76, 9.1
(Merlin); 4.75, 9.1 (Merlin).
1985 December 13 (4150) Daniel W. E. Green
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