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IAUC 4306: 1982i; 1987c; N And 1986; 1986n

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                                                  Circular No. 4306
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)
     M. Kidger and F. Garzon, Instituto de Astrofisica de Canarias,
La Laguna, Tenerife, report:  "Spectral observations of P/Halley on
1986 Dec. 16-17 with the 2.5-m Isaac Newton Telescope (+ image
proportional counting system, range 370-740 nm) did not reveal CN or
C3 emission.  These results are in contradiction to observations
reported by Wyckoff and Tegler (IAUC 4284).  This may indicate that
gaseous emission from the nucleus is only sporadically active at
the comet's present heliocentric distance."
     Further visual magnitude estimate:  Jan. 26.40 UT, 12.4 (C. S.
Morris, Pyramid Lake, CA, 0.26-m reflector).


COMET NISHIKAWA-TAKAMIZAWA-TAGO (1987c)
     Further total visual magnitude estimates:  Jan. 24.04 UT, 9.3
(J. DeYoung, Sterling, VA, 0.25-m reflector); 24.99, 9.0 (DeYoung);
25.40, 7.8 (Y. Sugiyama, Hiratsaka, Japan, 0.16-m reflector);
26.42, 8.1 (Sugiyama); 27.00, 8.9 (DeYoung).


NOVA ANDROMEDAE 1986
     G. A. Milani, Padua, reports the following photoelectric V and
B-V data obtained by G. Favero, A. Tonello, and himself with the G.
Colombo Observatory 0.40-m reflector:  1986 Dec. 11.73 UT, 7.28, -;
12.75, 7.57, +0.31; 17.74, 8.36, +0.25; 20.77, 8.63, +0.20; 22.74,
8.82, +0.28, U-B = -0.69; 25.78, 9.05, +0.18, U-B = -0.67; 27.74,
9.16, +0.23; 1987 Jan. 2.73, 9.68, +0.31; 4.72, 10.21, +0.29; 6.72,
10.76, +0.64; 8.75, 10.86, -.


COMET SORRELLS (1986n)
     Total visual magnitude estimates (L = reflector):  1986 Dec.
22.77 UT, 8.3 (M. V. Zanotta, near Como, Italy 10x50 binoculars);
23.51, 9.4 (J. Kobayashi, Kumamoto, Japan, 0.31-m L); 26.18, 9.5
(A. Hale, Las Cruces, NM, 0.20-m L); 30.10, 9.6 (R. Keen, Mount
Thorodin, CO, 0.3-m L; 3' tail in p.a. 80 deg); 31.98, 9.3 (DeYoung);
1987 Jan. 2.18, 9.1 (Hale; tail 5' in p.a. 40 deg); 6.08, 9.1 (C.
Spratt, Victoria, BC, 0.20-m L); 10.40, 9.7 (Sugiyama); 20.13, 8.7
(C. S. Morris, Whitaker Peak, CA, 20x80 binoculars); 27.00, 9.8
(DeYoung).


1987 January 28                (4306)            Daniel W. E. Green

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