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IAUC 5698: 1993c; (5145); 1992a1

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IAUC number 

                                                  Circular No. 5698
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 TEMPEL 1 (1993c)
     J. V. Scotti, Lunar and Planetary Laboratory, reports his
recovery of this comet with the Spacewatch 0.9-m telescope at Kitt
Peak:

     1993 UT             R.A. (2000) Decl.        m2
     Jan. 21.19826    6 33 22.43   +31 00 14.4   20.7
          21.20728    6 33 21.95   +31 00 15.0   21.2
          21.21597    6 33 21.49   +31 00 15.6   21.2
          21.22474    6 33 21.02   +31 00 16.3   21.0
          22.26829    6 32 26.75   +31 01 11.8   21.2
          22.27729    6 32 26.30   +31 01 12.2   21.4
          22.28610    6 32 25.82   +31 01 12.6   21.3

The object is of essentially stellar appearance and the position in
close agreement with the prediction on MPC 18258.


(5145) PHOLUS
     J. Davies, Royal Observatory, Edinburgh; J. Spencer, Lowell
Observatory; M. Sykes, Steward Observatory; D. Tholen, Institute
for Astronomy, University of Hawaii; and S. Green, University of
Kent, report:  "We obtained thermal infrared observations of (5145)
Pholus from Mauna Kea.  Following are the mean times of observation
and the corresponding Q magnitudes.  The first two observations
were by Spencer and Tholen with the NASA Infrared Telescope Facility,
and the third observation was by Davies with the U.K. Infrared
Telescope (UKIRT):  Jan. 11.66 UT, 3.87 +0.50/-0.34; 12.42, 4.47
+0.50/-0.34; 14.56, 3.86 +/- 0.3.  On Jan. 12, pointing was by
blind offset from a nearby star due to high sky brightness from the
moon.  The minor planet was visible and had the expected visual
magnitude as determined by simultaneous optical photometry.  Use of
a standard thermal model with the UKIRT data suggest a minimum
diameter of 189 +/- 26 km and a maximum albedo of 0.044 +/- 0.013."


COMET OHSHITA (1992a1)
     H. Mikuz, Ljubljana, Slovenia, reports m1 = 14.4 on Jan. 19.20
UT, using a 0.20-m Baker-Schmidt camera (+ CCD + V filter).


1993 January 27                (5698)            Daniel W. E. Green

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