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- Circular No. 5400
- 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
-
-
- SUPERNOVA 1991bg IN NGC 4374
- H. Kosai, National Astronomical Observatory of Japan, communi-
- cates the visual discovery by Reiki Kushida (Yatsugatake South Base
- Observatory), using a 0.40-m f/5 reflector, of a supernova in NGC
- 4374 (M84); on Dec. 9.844 UT, she estimated that the object is about
- 80" from the galaxy's center, in p.a. 165 deg, with mv = 14. Y.
- Kushida provides the following accurate position for the supernova,
- from photographs exposed Dec. 9.86 at the same site: R.A. =
- 12h22m31s.54, Decl. = +13 08'52".4 (equinox 1950.0). Approximate
- photovisual magnitudes from Y. Kushida: Nov. 17.802, [15.1; Dec.
- 3.777, 14.9; 9.860, 14.5; 10.804, 14.4. On Dec. 10.8, using the
- 0.91-m reflector (+ multichannel photometer) at the Dodaira Station
- of National Astronomical Observatory, T. Kato found that the super-
- nova was at V about 14.3. There is a foreground star of mag V =
- 14.7 some 80" from the galaxy's center toward the southwest.
- At the request of A. Filippenko (University of California at
- Berkeley), following his discussions with the Central Bureau, the
- Berkeley Automated Supernova Search Team obtained a CCD image of M84
- on Dec. 12 UT; examination of the image by H. Newberg shows a stel-
- lar object, located 57" south and < 2" east of the galaxy's center,
- that was not present in earlier images of the galaxy.
-
-
- DY PERSEI
- A. Alksnis, Radioastrophysical Observatory, Latvian Academy of
- Sciences, reports: "This carbon star, suspected to be an R CrB-type
- variable, was observed with the Baldone Schmidt telescope and found
- to be in a deep minimum: Dec. 2.74 UT, V = 15.7; 5.54, V = 15.7;
- 5.55, B = 17.0. For a finding chart and information on previous
- photometric behavior, see Investig. Sun and Red Stars 33, 83 (1990,
- Riga)."
-
-
- PERIODIC COMET WIRTANEN (1991s)
- Total visual magnitude estimates (cf. IAUC 5389): Nov. 18.41
- UT, 11.5 (J. E. Bortle, Stormville, NY, 0.32-m reflector); 18.52,
- 11.6 (A. Hale, Las Cruces, NM, 0.41-m reflector); Dec. 10.21, 13.9
- (H. Mikuz, Ljubljana, Yugoslavia, 0.36-m reflector).
-
-
- 1991 December 12 Daniel W. E. Green