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IAUC 5882: 1993q; N Aql 1993; 1993ac

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                                                  Circular No. 5882
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@CFA or GREEN@CFA (.SPAN, .BITNET or .HARVARD.EDU)


PERIODIC COMET URATA-NIIJIMA (1993q)
     This comet has been recovered by J. V. Scotti with the Spacewatch
telescope at Kitt Peak, as shown below.  A 11" coma was visible
on Oct. 20.49 (15" on Oct. 21.50); a 0'.4 tail was visible on
both nights in p.a. 290-292 deg; m2 = 22.7 on both nights.  The
indicated correction to the prediction on MPC 16380 (ephemeris on MPC
22064) is Delta(T) = +0.24 day.

     1993 UT             R.A. (2000) Decl.        m1
     Oct. 20.48992   10 24 24.33   +33 03 28.7   19.4
          20.49859   10 24 25.51   +33 03 26.5
          20.50731   10 24 26.76   +33 03 23.1   19.2
          21.48952   10 26 50.29   +32 58 20.4
          21.49821   10 26 51.65   +32 58 17.0   19.6


NOVA AQUILAE 1993
     C. E. Woodward and J. Cole, University of Wyoming; and R. D.
Gehrz, University of Minnesota, report the following infrared
broadband magnitudes, obtained using the WIRO 2.3-m telescope (+
University of Minnesota bolometer and remote computer link) on Oct.
6.1 UT:  J = 9.67 +/- 0.44, H = 8.64 +/- 0.06, K = 6.21 +/- 0.04, L
= 3.45 +/- 0.01, M = 2.40 +/- 0.01, N = 1.02 +/- 0.07.  Additional
photometry through the narrow-band IRTF silicate filter set gave
magnitudes of [7.8 microns] = 1.31 +/- 0.06, [8.7 microns] = 1.23
+/- 0.03, [9.8 microns] = 1.13 +/- 0.04, [10.3 microns] = 1.06 +/-
0.05, [11.6 microns] = 1.77 +/- 0.16, and [12.5 microns] = 2.81 +/-
0.17.  These data are consistent with continuum emission from a
750-K blackbody and suggest that dust has formed in the ejecta (cf.
IAUC 5831).  There is no evidence for a strong [Ne II] emission
line at 12.8 microns.


SUPERNOVA 1993ac IN ANONYMOUS GALAXY
     B. Schmidt and R. Kirshner, Harvard-Smithsonian Center for
Astrophysics (CfA), report that inspection of a spectrogram taken by
J. Huchra (CfA) and J. Brodie (University of California, Santa Cruz)
at the Multiple-Mirror Telescope on Oct. 20.5 UT reveals that this
object is a type-Ia supernovae about 1 week past maximum -- not a
type-II supernova as hinted on IAUC 5879.  The redshift derived from
the spectrum of the host galaxy is 14 800 km/s.


1993 October 21                (5882)            Daniel W. E. Green

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