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IAUC 4488: N Vul 1987; 1987A; 1987m; 1987u

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IAUC number 

                                                  Circular No. 4488
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 617-495-7244/7440/7444


NOVA VULPECULAE 1987
     Kenneth Beckmann, Lewiston, MI, and Peter Collins, Scottsdale,
AZ, report their independent discoveries of an apparent nova on
Nov. 15.042 and 15.128 UT, respectively.  The object is located at
R.A. = 19h02.1, Decl. = +21 40' (equinox 1950.0).  Visual magnitude
estimates: Nov. 15.042, 7.0 (Beckmann); 15.128, 7.3 (Collins); 16.062,
7.4 (Beckmann); 16.115, 7.4 (Collins).  There is no object at this
position to mag about 12-13 on the Vehrenberg photographic atlas.


SUPERNOVA 1987A IN THE LARGE MAGELLANIC CLOUD
     E. F. Erickson, M. R. Haas, S. W. J. Colgan, M. G. Burton, and
S. D. Lord, NASA/Ames Research Center, report:  "Far-infrared
observations on Nov. 4 and 7 of SN 1987A from NASA's Kuiper Airborne
Observatory yield a probable detection of [Fe II] (25.98 microns) at a
level of 2.0 (+/- 0.6) x 10E-18 W/cm2 with a FWHM on the order of
3000-5000 km/s.  Other possible identifications of this feature are
[O IV] (25.87 microns) or [Fe V] (25.92 microns).  If the emission is
optically thick, then the flux measurement constrains the product of the
temperature (in deg K) and the cube of the expansion velocity (in
km/s) to be about 1.4 x 10E13.  Thus the observed line width suggests
a temperature of about 1000-4000 K for the ejecta.  If the total
flux observed in the 12,000-km/s bandpass is interpreted as continuum
instead of line emission, it is at most 12 +/- 3 Jy at 26 microns."
     Visual magnitude estimates by A. C. Beresford, Adelaide, South
Australia:  Nov. 11.45 UT, 6.0; 12.51, 6.0; 13.52, 6.0; 14.49, 6.0.


PERIODIC COMET BROOKS 2 (1987m)
     Total visual magnitude estimates (cf. IAUC 4472):  Oct. 23.13
UT, 13.0: (R. Keen, Mt. Thorodin, CO, 0.32-m reflector); Nov. 11.16,
12.9 (A. Hale, Las Cruces, NM, 0.41-m reflector).


COMET RUDENKO (1987u)
     Total visual magnitude estimates:  Oct. 20.17 UT, 7.5 (M. V.
Zanotta, near Como, Italy, 20x80 binoculars); 27.74, 6.6 (D. A. J.
Seargent, The Entrance, N.S.W., 15x80 binoculars); Nov. 1.30, 7.9
(V. F. de Assis Neto, Sao Francisco de Oliveira, Brazil, 10x70
binoculars); 11.51, 8.0 (Hale; moonlight).


1987 November 16               (4488)            Daniel W. E. Green

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