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IAUC 4149: 1982i

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                                                  Circular No. 4149
Central Bureau for Astronomical Telegrams
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

     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

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