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IAUC 5379: 1991bd; R CrB; 1991d; V1251 Cyg

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IAUC number 

                                                  Circular No. 5379
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 1991bd IN UGC 2936
     A. V. Filippenko and T. Matheson, University of California,
Berkeley, communicate:  "A CCD spectrum (range 390-710 nm, resolution
1 nm), obtained on Oct. 31 UT with the Shane 3-m reflector at
Lick Observatory, confirms that SN 1991bd is of type Ia (cf. IAUC
5367) rather than type II (cf. IAUC 5370)."


R CORONAE BOREALIS
     Photoelectric measurements by D. Bohme, Nessa, Germany:  Oct.
4.79 UT, V = 5.73, B-V = +0.57; 7.77, 5.77, +0.53; 10.75, 5.85,
+0.55; 14.81, 5.86, -; 26.75, 6.05, +0.72; 27.75, 6.08, +0.69;
28.75, 6.14, +0.66.  Visual magnitude estimates (cf. IAUC 5059):
Aug. 19.88, 6.0 (A. Pereira, Cabo da Roca, Portugal); Sept. 26.83,
6.0 (Pereira); Oct. 12.84, 6.0 (Pereira); 27.06, 6.0 (D. York,
Abiquiu, NM); Nov. 2.06, 6.2 (York); 5.06, 6.5 (York).


COMET SHOEMAKER-LEVY (1991d)
     Ephemeris from orbital elements on MPC 18256:

     1991 ET      R.A. (1950) Decl.     Delta      r       m1
     Oct. 31    13 11.83    +34 07.3    2.879    2.370    12.0
     Nov. 10    13 41.27    +35 06.4
          20    14 12.98    +36 07.7    2.662    2.313    11.8
          30    14 46.88    +37 08.1
     Dec. 10    15 22.62    +38 03.9    2.508    2.278    11.6
          20    15 59.59    +38 51.5
          30    16 36.94    +39 28.0    2.439    2.265    11.5

     Total visual magnitude estimates:  Nov. 5.52 UT, 12.3 (A. Hale,
Las Cruces, NM, 0.41-m reflector); 6.55, 11.5: (D. Machholz, 0.25-m
reflector, Colfax, CA).


V1251 CYGNI
     T. Kato, Kyoto University, reports:  "CCD photometry with the
Ouda 0.6-m reflector revealed superhumps at Nov. 3.448, 3.524, and
3.600 UT (amplitude 0.25-0.35 magnitude in V).  The amplitude was
only 0.05 magnitude on Oct. 28.  The development of superhumps was
very slow for an SU UMa-type star."


1991 November 6                (5379)             Daniel W. E. Green

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