Central Bureau for Astronomical Telegrams
IAUC 4870: 1989v; V1333 Aql (AQUILA X-1)
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 4871
Circular No. 4870
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Telephone 617-495-7244/7440/7444 (for emergency use only)
TWX 710-320-6842 ASTROGRAM CAM EASYLINK 62794505
MARSDEN or GREEN@CFA.BITNET MARSDEN or GREEN@CFAPS2.SPAN
COMET HELIN-ROMAN-ALU (1989v)
D. D. Balam, Victoria, reports the following observations:
1989 UT R.A. (1950) Decl.
Oct. 3.21326 0 07 11.82 - 5 31 54.6
3.22437 0 07 09.00 - 5 31 29.9
Preliminary parabolic orbital elements from six observations,
Oct. 1-3:
T = 1989 Dec. 15.987 ET Peri. = 67.679
Node = 7.767 1950.0
q = 1.05564 AU Incl. = 46.615
1989 ET R.A. (1950) Decl. Delta r m1
Oct. 1 0 16.40 - 6 58.9 0.616 1.611 13.0
6 23 54.77 - 3 30.4
11 23 30.45 + 0 38.4 0.532 1.500 12.4
16 23 04.22 + 5 18.8
21 22 37.17 +10 14.8 0.501 1.395 11.9
26 22 10.55 +15 07.4
31 21 45.39 +19 41.1 0.518 1.298 11.7
Total visual magnitude estimate by A. Hale, Las Cruces, NM
(0.41-m reflector): Oct. 3.22 UT, 12.7.
V1333 AQUILAE (AQUILA X-1)
S. A. Ilovaisky and C. Chevalier, Observatoire de Haute
Provence, write: "CCD photometry of the optical counterpart of
this transient x-ray burst source obtained with the OHP 1.2-m
reflector reveals that the object was bright (V = 17.4) on
Sept. 30.8 UT. Observations on the two following nights show
that it rapidly declined in brightness (V = 18.3 on Oct. 2.8).
These observations, and the fact that the object was still in
quiescence on Aug. 5.0, imply that we have observed the tail of an
unreported x-ray outburst that probably started in late Aug./early
Sept. The time interval between the last reported outburst
in 1988 Nov.-Dec. (IAUC 4675, 4687) and the present one does not
agree with the underlying 122- to 125-day cycle suggested by
Priedhorsky and Terrell (1984, Ap.J. 280, 661). Further
observations, particularly in x-rays, would be useful."
1989 October 3 (4870) Daniel W. E. Green
Read IAUC 4871
Our Web policy. Index to the CBAT/MPC/ICQ pages.
