Central Bureau for Astronomical Telegrams
IAUC 3776: lambda And; 1982i; Occn OF AGK3 +11 201 BY (19)
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Read IAUC 3777
Circular No. 3776
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 617-864-5758
lambda ANDROMEDAE
M. S. Barbour and J. C. Kemp, Physics Department, University
of Oregon, write: "We have apparently detected a new periodicity
in this star from V-band polarimetry that includes 250 measurements
on 74 nights from 1980 July to 1981 Mar. The power spectrum
does not show noticeably the known 20.5-day and 54-day periods.
However, there is an outstanding peak at a period of 1.295 days
and/or at the 1-day-alias period of 4.38 days; the 1.295-day peak
is the stronger, at 6-sigma and with a null-detection probability of ~
5 . 10**-3. The peak-to-peak polarization amplitude is ~ 0.01
percent. We have no model for the physical origin of such a periodicity.
A search for this period in other kinds of data is urged."
PERIODIC COMET HALLEY (1982i)
M. J. S. Belton and H. Butcher, Kitt Peak National Observatory,
report the following precise position, derived from the
average of twenty 60-s exposures with the 4-m reflector
superimposed according to the assumed motion of the comet.
1982 UT R.A. (1950.0) Decl.
Dec. 13.2059 6 56 26.31 + 9 03 17.7
The comet's image is starlike with V = 24.0 +/- 0.2. This formal
error indicates only the consistency of the measurement process;
the actual uncertainty is perhaps 2 or 3 times larger.
OCCULTATION OF AGK3 +11 201 BY (19) FORTUNA
This event was observed with the 1.5-m reflector at CERGA's
Caussols Station by J. E. Chabaudie, D. Feraudy, J. F. Mangin, C.
Meyer and J. M. Torre. The occultation, which lasted for 5.3 s,
began on Feb. 3d18h24m36s7 UT. Consistent results were obtained
visually by J. Pinson and B. Candela at La Seyne-sur-Mer.
Photoelectric monitoring at Haute Provence, evidently a few km north of
the northern limit, showed no significant occultation between
18h16m3 and 18h36m1. W. Thuillot and J.-E. Arlot, Bureau des
Longitudes: and J. Lecacheux, Meudon Observatory, report that
videoastrometry with the 1-m Meudon reflector gave closest approach
at 18h24m30s +/- 11s UT and separation then 0".54 +/- 0".13.
1983 February 22 (3776) Brian G. Marsden
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