Central Bureau for Astronomical Telegrams
IAUC 3650: omicron And; Occn OF SAO 145972 BY (18); 1981 VA; 1981j
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Read IAUC 3651
Circular No. 3650
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
omicron ANDROMEDAE
M. Bossi, G. Guerrero, L. Mantegazza and M. Scardia, Osservatorio
Astronomico di Milano-Merate, write: "Two red spectrograms
(dispersion 3.0 x 10**-6) taken of omicron And on Nov. 26 and 28 with the
Merate Observatory's 1.37-m telescope show emission in the H-alpha wings.
At the same time, the U, B and V luminosities underwent a notable
decrease with respect to the level reached in 1980."
OCCULTATION OF SAO 145972 BY (18) MELPOMENE
D. Herald, Woden, near Canberra, reports the following observation
of this occultation, observed with the 0.76-m reflector at Mt.
Stromlo. Commencement: 1981 Aug. 7d12h14m44s.9 +/- 0s/1 UT; end:
7d12h15m04s.2 +/- 0s.2. No secondary events were detected (cf. IAUC
3315; Williamon 1980, A.J. 85, 174).
1981 VA
The times of the Palomar observations on IAUC 3645 should be
corrected by +0.00208 day. The following ephemeris is from the
improved orbital elements on MPC 6525:
1981/82 ET R. A. (1950) Decl. Delta r Mag.
Dec. 12 2 30.09 +17 53.9 0.770 1.657 19.0
17 2 32.47 +16 25.5
22 2 35.39 +15 18.1 0.950 1.764 19.7
27 2 38.78 +14 27.5
Jan. 1 2 42.58 +13 50.1 1.143 1.868 20.3
6 2 46.76 +13 23.4
11 2 51.25 +13 05.3 1.347 1.967 20.7
PERIODIC COMET SWIFT-GEHRELS (1981j)
This comet has been somewhat brighter than had been expected,
as depicted in the following selection of total visual magnitude
estimates: Nov. 8.09 UT, 12.1 (C. Sherrod, N. Little Rock, AR, 0.4-m
reflector); 23.02, 11.1 (J. Bortle, Storrnville, NY, 0.32-m reflector);
24.05, 10.9 (C. S. Morris, Harvard, MA, 0.25-m reflector);
25.79, 10.3 (E. P. Bus, Groningen, The Netherlands, 0.15-m
reflector); 28.17, 10.9 (C. E. Spratt, Victoria, BC, 0.2-m reflector).
1981 December 14 (3650) Daniel W. E. Green
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