Central Bureau for Astronomical Telegrams
IAUC 3478: zeta Oph; OPTICAL OUTBURST OF Aql X-1 (4U 1908+00); JUPITER; HR Del
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Circular No. 3478
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
zeta OPHIUCHI
Corrigendum. We have been informed that the emission episode
described on IAUC 3469 refers to the star zeta Oph = HR 6175, not to theta
Oph. The attention of contributors, especially those leaving recorded
messages at the above telephone number, is drawn again to
the note on IAUC 3467. Two identifications of objects, even of
bright stars, should be included in all reports.
OPTICAL OUTBURST OF AQUILA X-1 (4U 1908+00)
B. Margon, University of California at Los Angeles, reports
that Aql X-1 has entered its infrequent outburst state (cf. IAUC
3235, 3243). Observations from the Lick Observatory on May 16 and
17 UT show the object at V = 17.5, near maximum light, with weak
He II 468.6-nm and C III 465.0-nm emission, but no Balmer lines.
An x-ray flare is presumably also in progress.
JUPITER
New Mexico State University Observatory is tracking a very
bright spot in the jet in Jupiter's North Temperate Current C at
23o latitude. The spot was first seen on plates taken on May 11
and was measured at longitude 118o.5 (system II) on a plate taken on
May 15d03h05m UT. Calculations from measurements on three dates
yield a velocity of -13o.55 per day relative to system II. Plates
taken in red light show a series of dark spots trailing the
fast-moving bright spot.
HR DELPHINI
L. Kohoutek and R. Pauls, Hamburg Observatory, write: "UBV observations
of Nova (HR) Del 1967 made with the 1-m telescope at the
Wise Observatory in 1977 Aug. and 1979 July-Aug. indicate a
short-period sinusoidal light variability. The best fit to our 1977 and
1979 data was found for the periods 0.1772 +/- 0.0002 day and 0.1776 +/-
0.0002 day, respectively. The V amplitude was 0.16 mag in 1977 and
0.10 mag in 1979. The period differs slightly from that given by
Hutchings (IAUC 3310; see also Ap.J. 232, 176) from radial-velocity
data, and this point is discussed in A. & Ap., in press. Other
periods, 0.2159 day in 1977 and O.2167 day in 1979, are less probable."
1980 May 21 (3478) Brian G. Marsden
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