Central Bureau for Astronomical Telegrams
IAUC 4682: o And; OS And; KR Aur; MARS
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Circular No. 4682
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
o ANDROMEDAE
G. J. Peters, Space Sciences Center, University of Southern
California, communicates: "After five years of quiescence, the Be star
o And A appears to be entering another major shell phase similar to the
ones that began in 1975 and 1981 (cf. IAUC 2814, 3658). Observations
obtained at Kitt Peak National Observatory with the coude feed
telescope and RCA2 CCD detector during Nov. 4-6 reveal conspicuous,
double-peaked emission in H alpha (peak intensity near the continuum
level) and a deep core (0.41 Icont). Earlier observations with the TI3
CCD showed a strengthening of the H alpha core between 1987 Aug. and
1988 May (0.60-0.45 Icont) but no emission. IUE observations also
confirm that o And is in a shell phase. Observations on 1988 Aug. 19
and Oct. 30 revealed enhanced shell absorption in all moderately
ionized species (e.g., Si II, Fe III), C IV emission, and a lower far-
ultraviolet flux level (about 0.90 its value in 1987 Aug.). Observations
during the initial stages of this new shell phase are urged before the star
becomes unobservable for the season in January."
OS ANDROMEDAE
Visual magnitudes: July 17.99 UT, 15.3 (A. Boattini,
Piazzano, Italy); Aug. 11.01, 15.5 (Boattini, Montecarmo, Italy);
20.91, 15.2 (M. Verdenet, Bourbon-Lancy, France); Sept. 6.96, 15.5: (S.
Korth, Dusseldorf, West Germany); 17.89, 15.1 (Verdenet); Oct. 8.92,
[13.9 (J. Ripero, Madrid, Spain); Nov. 3.90, 15.5 (R. Monella, Covo,
Italy); 6.90, 15.7 (Monella).
KR AURIGAE
Visual magnitude estimates by J. E. Bortle, Stormville, NY:
Nov. 10.1 UT, 13.8; 18.1, 13.7; 29.15, 14.4.
MARS
J. D. Beish, ALPO International Mars Patrol, informs us that Mars
Patrol observers have detected a major dust storm on Mars, the first
since June (cf. IAUC 4617). First noted as a yellow oval over Nectar
(L = 70 deg, B = -25 deg) around Nov. 25.0 UT, the feature had
extended to L = 110 deg by Nov. 29 and ranged over much of the
southern hemisphere. T. Cave, Long Beach, CA, has remarked in
addition on a very dark strip around B = -70 to -80 deg, extending
westward from L = 20 deg for 90 deg or more.
1988 November 30 (4682) Brian G. Marsden
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