Central Bureau for Astronomical Telegrams
IAUC 3406: 2S 1822-371; V794 Aql; COMET ON PSS
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 3407
Circular No. 3406
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
2S 1822-371
P. Seitzer and I. R. Tuohy, Mount Stromlo and Siding Spring
Observatories; K. O. Mason, J. Middleditch and J. Nelson, University
of California at Berkeley; and N. E. White, Goddard Space
Flight Center, report that optical photometry of the star
associated with 2S 1822-371 (Griffiths et al. 1978, Nature 276, 247) at
Cerro Tololo Interamerican Observatory and Mt. Stromlo reveals a
smooth modulation with a period of 5.5697 +/- 0.0015 hours and a
minimum at 1979 Aug. 16.455 +/- 0.008 UT. The lightcurve shows a
V-shaped minimum with a full width at half light of ~ 1 hour, a B
magnitude at maximum of 15.6 and a range of ~ 1 magnitude. Einstein
solid-state-spectrometer data show evidence for variability
by a factor of two on a timescale of an hour but no x-ray eclipse
at the projected time of optical minimum.
V794 AQUILAE
L. Meinunger, Sonneberg Observatory, reports that Sonneberg
plates show that V794 Aql exhibits brightness variations that are
very similar to those of AN UMa. The spectrum reveals slightly
diffuse hydrogen emission lines superposed on a blue continuum
(Bond 1978, P.A.S.P. 90, 526). Photoelectric and x-ray observations
are therefore very desirable. On Sept. 11 the photographic
magnitude of V794 Aql was 15.3.
COMET ON PALOMAR SKY SURVEY
H. Hartl, Institut fur Astronomie, Innsbruck, writes that he
has found images of an unidentified comet on Palomar Sky Survey
prints No. 1267. On the red print, there is a diffuse trail ~0'.4
long, while the blue print shows a more concentrated blob with an
elongated shape and a diameter of ~ 6"; the blue print also shows a
very faint tail, about 20" long and directed toward the west. The
position determined from the blue exposure (uncertainty +/- 3") is:
1954 UT R.A. (1950) Decl. m1
Nov. 4.42778 5 22 49.8 +14 32 52 ~19.5
The corresponding position is at x = 99 mm and y = 305 mm from the
lower left corner of the red print. The comet's daily motion is
~ 11' in a direction 73o +/- 5o south of west.
1979 September 19 (3406) Brian G. Marsden
Read IAUC 3407
Our Web policy. Index to the CBAT/MPC/ICQ pages.
