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IAUC 4752: 1989i = 1987 XXXVI; 1987A; 1989B

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IAUC number 

                                                  Circular No. 4752
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 or GREEN@CFA.BITNET    MARSDEN or GREEN@CFAPS2.SPAN


PERIODIC COMET PARKER-HARTLEY (1989i = 1987 XXXVI) = 1986 TF
     S. Nakano, Center for Astrophysics, has identified P/Parker-Hartley
with 1986 TF, an object reported as a minor planet by both A. Mrkos at
Klet and P. Jensen at Brorfelde and for which a Hilda-type orbit had
been computed (MPC 11417).  Nakano provides the orbital elements below.
Before the close approach to Jupiter (minimum separation 0.17 AU in 1984
May) the comet had q = 4.4 AU, e = 0.1.

                    Epoch = 1987 Sept. 2.0 ET
     T = 1987 Aug. 15.5682 ET         Peri. = 181.2923
     e = 0.294793                     Node  = 243.4052  1950.0
     q = 3.025312 AU                  Incl. =   5.2000
       a =  4.289960 AU    n = 0.1109237    P =   8.885 years


SUPERNOVA 1987A IN THE LARGE MAGELLANIC CLOUD
     M. Karovska, P. Nisenson, C. Papaliolios, and C. Standley,
Center for Astrophysics; and S. Heathcote, Cerro Tololo Interamerican
Observatory, communicate:  "Reduction of speckle data recorded on
1988 Nov. 28 and 1989 Jan. 20 confirms the existence of the bright
source near SN 1987A reported on IAUC 4749 from observations on
1988 Dec. 20.  The data were recorded with the CTIO 4-m telescope,
the PAPA detector, and a 35-nm bandpass centered at 551 nm.  The
source was located at p.a. 200 +/- 5 deg for all observations.
Preliminary estimates of the magnitude differences (from the SN) and
angular separations were:  3.3 +/- 0.2 mag and 0".85 +/- 0".05 (Nov.
28); and 2.1 +/- 0.2 mag and 0".95 +/- 0".05 (Jan. 20).  The Dec.
result showed that the source was 2.6 +/- 0.2 mag different from the
SN and separated by 0".85 +/- 0".05.  Data recorded at other
wavelengths are currently being reduced."


SUPERNOVA 1989B IN NGC 3627
     S. H. Lucas, Midlothian, IL, reports that K. Zussman, Thousand
Oaks, CA, obtained a photograph of NGC 3627 with the Lowell Observatory
1.07-m f/8 telescope centered on Jan. 15.43 UT.  Inspection of the
50-min exposure (Kodak 2415 film) by H. Corwin, McDonald Observatory,
reveals no stellar object at the location of SN 1989B to red magnitude
19.5 (blue mag 20.5).


1989 March 7                   (4752)             Daniel W. E. Green

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