IAUC 4730: 1989C, 1989D; 1989B; 1988r

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                                                  Circular No. 4730Central Bureau for Astronomical TelegramsINTERNATIONAL ASTRONOMICAL UNIONPostal Address: Central Bureau for Astronomical TelegramsSmithsonian 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 62794505MARSDEN or GREEN@CFA.BITNET    MARSDEN or GREEN@CFAPS2.SPANSUPERNOVAE 1989C AND 1989D     P. Wild, Astronomical Institute, Berne University, reports thediscovery of two supernovae on Feb. 3 (confirmed Feb. 4).  SN 1989C,at mpg = 14.5, is located at R.A. = 9h45m09.98, Decl. = +2 51'33".0(equinox 1950.0), near the center of an anonymous Sc galaxy.SN 1989D, at mpg = 16, is located at R.A. = 9h43m15.47, Decl. =+73 12'09".2, which is 2" east and 23" north of the center of NGC 2963= Mrk 122.SUPERNOVA 1989B IN NGC 3627     S. Ryan and N. Visvanathan, Mount Stromlo and Siding SpringObservatories, telex:  "We have obtained a spectrum (range 440-700nm) of SN 1989B on Jan. 31.6 UT with the Siding Spring 2.3-m telescope(+ double-beam spectrograph, resolution 0.3 nm).  We find thecontinuum of the supernova to be bluer than the parent galaxy, NGC3627, and dominated by broad absorption troughs (width approximately20.0 nm).  We could identify Si II (635.5, 505.1 nm), and possiblySi I (545.4 nm), all blueshifted by about 10 000 km/s.  There issuggestion of P-Cyg profiles.  Thus our data support the supernova'sbeing type Ia.  If we adopt a distance modulus of -30.37 and anapparent magnitude 13.0, the absolute magnitude of SN 1989B is derivedas -17.37, suggesting that it may not yet have reached maximumbrightness.  A second observation, obtained on Feb. 1.6, shows nomajor changes in the appearance of the spectrum."COMET YANAKA (1988r)     Extension to the ephemeris onIAUC 4723:     1989 ET      R.A. (1950) Decl.     Delta      r       m1     Feb. 23     7 36.37    -31 35.7    0.844    1.608    14.2          28     7 27.66    -29 30.9     Mar.  5     7 22.17    -27 43.4    1.080    1.770    15.1          10     7 18.98    -26 10.5          15     7 17.50    -24 50.0    1.326    1.927    16.0          20     7 17.30    -23 40.1          25     7 18.10    -22 39.3    1.579    2.079    16.7          30     7 19.69    -21 46.4     Apr.  4     7 21.90    -21 00.5    1.835    2.227    17.31989 February 6                (4730)             Daniel W. E. Green

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