Central Bureau for Astronomical Telegrams
IAUC 3825: 1983d; 1 Vul; 3C 273
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 3826
Circular No. 3825
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
COMET IRAS-ARAKI-ALCOCK (1983d)
Continuation to the ephemeris on IAUC 3805:
1983 ET R.A. (1950.0) Decl. p r m1
June 25 7 19.45 -43 32.4
July 5 7 19.65 -44 25.0 1.207 1.248 10.9
15 7 20.14 -45 35.0
25 7 20.33 -47 06.0 1.498 1.462 12.0
Aug. 4 7 19.62 -48 59.3
14 7 17.25 -51 15.0 1.709 1.698 13.0
24 7 12.24 -53 50.9
Sept. 3 7 03.39 -56 42.4 1.865 1.941 13.7
13 6 49.02 -59 41.9
23 6 27.03 -62 36.3 1.997 2.185 14.4
Oct. 3 5 55.44 -65 05.9
13 5 13.74 -66 45.1 2.142 2.427 15.0
1 VULPECULAE
W. B. Hubbard, Lunar and Planetary Laboratory, reports
observations of the May 29 occultation of 1 Vul by (2) Pallas by
H. J. Reitsema and himself with a portable telescope at a location
~ 45 km east of Presidio, TX. A 45-s-duration occultation was
observed to begin at 4h57m41s UT. The star, previously known as
a spectroscopic binary, showed a two-step disappearance, with the
brighter component occulted ~ 0.5 s (corresponding to a separation
of 0".003) before the fainter; the components differ in brightness
by 0.9 mag at 470 nm and by 0.6 mag at 800 nm. The Central Bureau
has received several other accounts of the occultation, but no
observers have reported secondary events.
3C 273
Z. Abraham, L. C. L. Botti and P. Kaufmann, Instituto de
Pesquisas Espaciais, Sao Paulo, report: "Observations of 3C 273 at 22
GHz at Itapetinga Observatory showed a smooth increase in flux
density from 25 Jy in July 1980 to a maximum of 46 Jy in Nov.
1982, followed by a decrease to 36 Jy in May 1983. Measurements
at 44 GHz in Sept. 1982 and May 1983 showed a constant flux density
of 25 Jy. No correlation was found with the millimeter and
submillimeter flare reported by Ade et al. on IAUC 3795."
1983 June 8 (3825) Brian G. Marsden
Read IAUC 3826
Our Web policy. Index to the CBAT/MPC/ICQ pages.
