Central Bureau for Astronomical Telegrams
IAUC 4149: 1982i
The following International Astronomical Union Circular may be linked-to from your own Web pages, but must not otherwise be redistributed (see these notes on the conditions under which circulars are made available on our WWW site).
Read IAUC 4150
Circular No. 4149
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
PERIODIC COMET HALLEY (1982i)
T. Morley, European Space Operations Centre, communicates: "M.
Wallis and R. Gilmozzi, on behalf of the European IUE/Halley team,
report that UV spectra were obtained with the International Ultraviolet
Explorer on Dec. 2, including mapping of the coma in Lyman-S
and a resolved spectrum of the OH (0-0) band. The nuclear magnitude
was low (FES magnitude = 10.9), though the coma filled the
16' x 16' field; the base of an eastward (tail) extension was seen.
The H and OH emissions were relatively weak, below the early-Nov.
value; O and C emissions were marginal and thus abnormally weak,
although 250-300-nm molecular and continuum emissions were very
strong. A secondary source suggesting an outburst is evident
1500-3000 km south of the nucleus, in OH, CS and continuum
emissions around Dec. 2.542 UT."
J. D. Bregman and F. C. Witteborn, Ames Research Center, NASA;
and D. M. Rank and D. Wooden, Lick Observatory, report: "We
observed P/Halley with the 3-m Shane telescope (spectral resolution
50) on Nov. 6-7 and found an absorption feature, centered at 3.1 microns
and ~ 0.2 microns wide, which we attribute to water ice."
K. R. Bondal, Uttar Pradesh State Observatory, reports
observations made by P. S. Goraya and B. S. Rautela made with the 1-m
reflector at Naini Tal, using the Hilger and Watts spectrum scanner
(0.9-nm resolution; range 300-700 nm) on Nov. 22.7 and 23.7 UT,
yielding the following tentative spectral identifications of emission
features: CN (1-0) 358-nm, CN (0-0) 388-nm, CH (0-0) + C3 405-
nm, CN (0-1) 420-nm, C2 (2-0) + CH (0-0) 435-nm, C2 (1-0) 470-nm,
C3 (0-0) 516-nm, C2 (0-1) 564-nm, and C2 (0-2) 619-nm.
Selected total visual magnitude estimates: Nov. 10.95 UT, 7.2
(J.-C. Merlin, Le Creusot, France, 7x50 binoculars); 12.16, 5.7 (C.
Spratt, Victoria, BC, 11x80 binoculars); 13.14, 7.5 (C. Stephan,
Sebring, FL, 0.36-m reflector); 15.17, 6.1 (J. E. Bortle,
Stormville, NY, 10x50 binoculars); 16.94, 5.8 (M. Cavagna, Valcava,
Italy, 10x50 binoculars); 19.32, 5.5 (C. S. Morris, near Mt. Wilson,
CA, 20x80 binoculars; tail 0.67 deg long in p.a. 90); 22.43, 5.5
(Morris; 0.33 deg tail in p.a. 75); 29.74, 5.4 (Merlin); Dec. 1.15,
5.2 (R. Keen, Golden, CO, 8x40 binoculars); 4.74, 4.8 (Merlin,
naked eye; coma dia. 70'); 6.88, 4.7 (Merlin, naked eye; coma dia.
60', tail length 95'); 9.10, 4.4 (Spratt, 11x80 binoculars; tail
30' long at p.a. 70); 10.13, 4.3 (D. W. E. Green, Cambridge, MA,
7x50 binoculars); 12.95, 4.1 (Green).
1985 December 13 (4149) Daniel W. E. Green
Read IAUC 4150
Our Web policy. Index to the CBAT/MPC/ICQ pages.
