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IAUC 4927: 1989e1; 1989U; U Gem; NGC 7078

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IAUC number

                                              Circular No. 4927
Central Bureau for Astronomical Telegrams
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

     E. Bowell communicates the following precise positions by B.
Skiff obtained at the Anderson Mesa Station of the Lowell
Observatory (magnitude estimate made with a 0.15-m refractor):

     1989 UT             R.A. (1950) Decl.        m1
     Dec. 20.07257   19 56 04.93   +25 42 55.3
          20.08542   19 56 06.30   +25 42 59.4   11.5

     Total visual magnitude estimate by C. S. Morris from
Whitaker Peak, CA (0.26-m reflector):  Dec. 20.14 UT, 10.2.

     J. Mueller, Palomar Observatory, reports that a spectrum of SN
1989U (cf. IAUC 4920) obtained by W. Sargent and C. Steidel on Dec.
20 UT with the Hale 5-m reflector (+ Double Spectrograph) shows
strong H-alpha emission, indicating a type-II supernova.  A precise
position of the supernova is R.A. = 9h49m45s.2, Decl. = +43 05'38"
(equinox 1950.0).
     A. V. Filippenko, University of California at Berkeley,
reports that spectra (range 390-970 nm, resolution 1-2 nm) show SN
1989U to be of type II, probably a few months past maximum brightness.
H-alpha emission is strong, and has FWHM approximately 7000
km/s, but the absorption component is weak.  Ca II infrared triplet
emission is also visible.

     Further visual magnitude estimates (cf. IAUC 4792):  June 9.85
UT, 9.7 (A. Boattini, Piazzano, Italy); Sept. 9.11, [12.3 (P.
Schmeer, Bischmisheim, W. Germany); 17.12, 10.0 (Schmeer); 19.10,
10.8 (Schmeer); 28.13, 13.8 (Schmeer); Dec. 16.2, [11.9 (R. Hays,
Worth, IL); 17.88, 9.6 (K. Medway, Southampton, England); 18.08,
9.4 (G. Dyck, N. Dartmouth, MA); 19.12, 9.2 (R. King, Duluth, MN).

NGC 7078
     Corrigendum.  On IAUC 4925, lines 4 and 5, for  mJy  read  microJy

1989 December 20               (4927)             Daniel W. E. Green

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