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IAUC 3143: 1977 UB; 1977 VA; SMC X-2 AND SMC X-3; ESO 113-IG 45

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IAUC number 

                                                  Circular No. 3143
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Cable Address: SATELLITES, NEWYORK     Telex: 921428
Telephone: (617) 864-5758


1977 UB
     C. Kowal, Hale Observatories, provides the following measurements
from exposures by A. G. DeBruyn, R. Adams and himself with
the 122-cm Schmidt telescope at Palomar:

     1977 UT             R. A. (1950) Decl.
     Nov. 13.38021     2 00 55.34   +11 42 18.2
          14.36076     2 00 45.37   +11 41 21.0
          18.30069     2 00 06.43   +11 37 30.1


1977 VA
     Precise positions measured by M. L. Kantz from exposures by
H. L. Giclas with the Lowell Observatory's 33-cm astrograph:

     1977 UT             R. A. (1950) Decl.
     Nov. 10.26667     2 29 35.82   +13 48 45.8
          13.26528     2 39 07.87   +13 24 42.7

     J. Degewij, Lunar and Planetary Laboratory, provides the
following photoelectric observations, made with the 154-cm reflector:
Nov. 16.37 UT, V = 16.37, B-V = +0.78, U-B = +0.19; 16.41, 16.05,
+0.68, +0.03; 17.28, 16.16, +0.65, +0.22; 17.42, 16.04, +0.71, +0.10.


SMC X-2 AND SMC X-3
     D. Allen, Anglo-Australian Observatory, reports that a systematic
spectroscopic search has revealed the same optical candidates
suggested by Sanduleak and Philip (IAUC 3127, 3134).  Both stars
are of magnitude ~ 15, have colors B-V ~ -0.3 and U-B ~ -1.0, are
of spectral type late O and have radial velocities indicating SMC
membership; both have H-alpha emission of ~ 5 A equivalent width; H-beta is
filled in, and the higher Balmer lines are in absorption.  The
positions (equinox 1950.0) of the candidates are: SMC X-2, R.A. =
0h52m53s.3, Decl. = -73o57'22"; SMC X-3, R.A. = 0h50m19s.9, Decl. = -73o42'26".


ESO 113-IG 45
     Corrigendum.  On IAUC 3134, the redshift z should have been
given as 0.045, not 0.845.


1977 November 28               (3143)              Brian G. Marsden

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