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IAUC 3915: P/ENCKE; 1983d; SN IN NGC 3227

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IAUC number 

                                                  Circular No. 3915
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


PERIODIC COMET ENCKE
     Total visual magnitude estimates: Jan. 28.98 UT, 11.7 (J.
Bortle, Stormville, NY, 0.50-m reflector); Feb. 1.99, 11.6
(Bortle); 5.13, 11.4 (C. S. Morris, Whitaker Peak, CA, 0.20-m
reflector).

     Ephemeris from the orbital elements on MPC 7455:

     1984 ET     R.A. (1950.0) Decl.      p        r       m1

     Feb. 10    23 54.73    + 7 33.9    1.567    1.070    11.3
          15     0 03.97    + 8 22.9
          20     0 13.92    + 9 14.5    1.462    0.904    10.1
          25     0 24.59    +10 07.5
     Mar.  1     0 35.98    +10 59.9    1.318    0.728     9.0
           6     0 47.97    +11 47.7
          11     1 00.15    +12 23.1    1.125    0.545     7.8
          16     1 11.35    +12 29.6
          21     1 18.60    +11 32.9    0.876    0.385     6.7
          26     1 15.92    + 8 34.0
          31     0 58.20    + 2 59.5    0.655    0.353     7.0
     Apr.  5     0 31.42    - 3 32.7
          10     0 07.08    - 8 45.1    0.640    0.486     8.3
          15    23 49.68    -12 07.8
          20    23 38.34    -14 11.7    0.720    0.666    10.3


COMET IRAS-ARAKI-ALCOCK (1983d)
     C. B. Cosmovici, DFVLR; and S. Ortolani, Asiago Astrophysical
Observatory, communicate: "Detailed investigation of four spectra
taken with the grating spectrograph at the Asiago 1.82-m telescope
on 1983 May 9.9 UT shows about 50 unknown lines.  The new
molecules HCO (strongest line at 483.3-483.8 nm) and H2S+ could be
identified, and the new species H2CO, S2, DCO and NH4 (identification
by G. Herzberg) were strongly suspected.  The spectral
range was 380-850 nm and the resolution 0.6 nm.  The spectra were
processed with the European Southern Observatory pds.
Confirmation by other observers would be appreciated."


SUPERNOVA IN NGC 3227
     Visual magnitude estimate by M. Verdenet, Bourbon-Lancy,
France: 1983 Dec. 3.2 UT, 13.8.


1984 February 10               (3915)              Brian G. Marsden

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