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IAUC 5633: 1992 QB1; 1992aw; N Sgr 1992 No. 2

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                                                  Circular No. 5633
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)


1992 QB1
     Further observations, made at the Anglo-Australian Observatory
on Sept. 21 and at the European Southern Observatory on Sept. 27,
are given in the October batch of Minor Planet Circulars, together
with minor corrections to the times of the earlier Mauna Kea
observations. The ephemeris below, by B. G. Marsden, Center for
Astrophysics, is from a new circular orbit, which differs only marginally
from the one on IAUC 5611.  MPC 20937 gives a very slightly different
ephemeris, putting the object currently about 3.5 AU farther
away.  That ephemeris is from some hypothetical elliptical elements,
given on MPC 20935, computed on the assumption that the object is
now near aphelion and similar to (2060) Chiron and (5145) Pholus,
with q = 8.5 AU and P approximately 140 yr.

1992 TT     R. A. (2000) Decl.   Delta     r    Elong. Phase    V
Oct.  5    23 58.58   - 0 07.9  40.192  41.169  167.5    0.3   23.5
     15    23 57.86   - 0 12.5  40.246  41.169  157.4    0.5   23.5
     25    23 57.21   - 0 16.6  40.328  41.169  147.3    0.7   23.5
Nov.  4    23 56.64   - 0 20.2  40.436  41.169  137.2    0.9   23.6
     14    23 56.18   - 0 23.1  40.566  41.169  127.0    1.1   23.6
     24    23 55.85   - 0 25.1  40.714  41.169  116.8    1.2   23.6
Dec.  4    23 55.67   - 0 26.3  40.876  41.169  106.6    1.3   23.6
     14    23 55.63   - 0 26.4  41.046  41.169   96.5    1.4   23.6
     24    23 55.74   - 0 25.6  41.220  41.169   86.3    1.4   23.6


SUPERNOVA 1992aw IN ANONYMOUS GALAXY
     D. D. Balam, University of Victoria, reports the following
precise position of this object (cf. IAUC 5606), from images
obtained by F. D. A. Hartwick, G. C. L. Aikman, and Balam at the
1.85-m telescope of the Dominion Astrophysical Observatory:  R.A. =
19h05m40s.48, Decl. = +50 58'09".2 (equinox 1950.0).  The center of
the host galaxy has end figures 39s.11, 04".2.


NOVA SAGITTARII 1992 No. 2
     Additional photometry (cf. IAUC 5576) by A. C. Gilmore, Mt.
John University Observatory (+/- 0.02 unless otherwise noted):
Sept. 17.44 UT, V = 11.86, B-V = +0.07, U-B = -0.56, V-R = +1.49
+/- 0.04, V-I = +0.68; 29.47, 12.17, +0.11, -0.39, +1.31 +/- 0.03,
+0.53 +/- 0.05.


1992 October 8                 (5633)            Daniel W. E. Green

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