Central Bureau for Astronomical Telegrams
IAUC 4138: 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 4139
Circular No. 4138
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)
R. Russell and D. Lynch, Space Sciences Laboratory, The
Aerospace Corporation, report the following infrared magnitudes using
the 1.52-m f/16 Cassegrain Steward Observatory/NASA telescope at
Mt. Lemmon with a 10-Hz, 80" chopper throw through a 15" aperture:
Nov. 8.3 UT, K = 6.16 +/- 0.22, L = 7.52 +/- 0.1, [10.27 microns (Delta-
lambda = 0.28 microns)] = 0.94 + 0.3. Alpha Tau was used as a calibration
source.
A. Tokunaga, University of Hawaii, reports the following
magnitudes obtained by C. Kaminski and D. Toomey on Nov. 1 (NASA
Infrared Telescope Facility, with 7"3 aperture centered on comet's
nucleus): J = 11.1, H = 10.6, K = 10.5, L = 10.1, [3.80 microns] = 10.1.
C. Barbieri, T. Iijima, and F. Sabbadin, Asiago Astrophysical
Observatory, telex: "A 103a-O plate (+ GG13 filter) taken with the
0.67-m/0.92-m Schmidt telescope (18-min exposure) on Nov. 8.98 UT
shows a bright, central, almost circular region of ~ 50" diameter
surrounded by a fainter coma of 430". A faint, straight tail ~
150" wide extends for at least 16' in p.a. 290. Further, short-
exposure images of the central 2'x1' region taken with the CCD camera
at the 1.83-m telescope on Nov. 12.10 show circular inner isophotes
becoming progressively elongated in the north-south direction.
The luminosity profile is slightly steeper on the east side
of the nucleus. No discrete features are seen in the CCD images.
Prismatic spectra with the slit oriented east-west (spectral range
380-700 nm) taken on Nov. 8.02 and 9.07 show the following main
emission features that extend for at least 1': CN (388.3, 421.6,
and 573.0 nm), H2CO (404.4 and 469.5 nm), C2 (471.3, 473.7, 516.5,
and 562.4 nm), C3 (405.2 and 407.4 nm), NH2 (569.3, 573.2, and
599.5 nm), H2O+ (620.0 nm), and [O I] [630.0 nm). The continuum is
confined to some 10" either side of the nucleus."
D.-Y. Tang and X.-L. Hao, Peking Observatory, write that
plates taken with the 0.40-m double astrograph and the 0.60-m/0.90-
m/1.80-m Schmidt telescope during Oct. 18-22 show a tail at p.a.
~ 230 and four jets of the following respective lengths and p.a.:
19", 175; 7", 183; 12", 177; 16", 218.
SUPERNOVA 1985P IN NGC 1433
Photoelectric observations by H. Morrison at Siding Spring
Observatory: Oct. 18.71 UT, V = 13.58, B-V = +0.17; 19.71, V =
13.62, B-V = +0.19. The uncertainty is +/- 0.03 in both V and B-V.
1985 November 18 (4138) Daniel W. E. Green
Read IAUC 4139
Our Web policy. Index to the CBAT/MPC/ICQ pages.
