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HD 90893


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SANTIAGO 91, a right ascension catalogue of 3387 stars (equinox J2000).
The positions in right ascension of 3387 stars belonging to the Santiago67 Catalogue, observed with the Repsold Meridian Circle at Cerro Calan,National Astronomical Observatory, during the period 1989 to 1994, aregiven. The average mean square error of a position, for the wholeCatalogue, is +/-0.009 s. The mean epoch of the catalogue is 1991.84.

Optical studies of gamma-ray burst fields, 1: GRB 790329
An optical photometric and proper motion survey of a approximately = 160sq arcmin region centered on an interplanetary network 41 sq arcmin GRB790329 error box is presented. No obvious counterparts to the gamma-rayburst were identified. The distribution of stellar colors in the surveyregion was that expected for the galactic latitude of the burst field.Six stars with significant proper motions were identified. One of these,Gl 397, was found to be a double star. The companion has the color andluminosity of an M4/5 dwarf. We note that associating the gamma-rayburst with the Gl 397 system seems to require energies beyond that seenin the flares of other late-type dwarfs. A small number of galaxies wereidentified, one of which (object #4), was the bluest object found in thesurvey (V - I = 0.49).

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Observation and Astrometry data

Constellation:Ύδρα
Right ascension:10h29m06.36s
Declination:-28°28'45.3"
Apparent magnitude:8.641
Distance:304.878 parsecs
Proper motion RA:-18.9
Proper motion Dec:4.6
B-T magnitude:10.235
V-T magnitude:8.773

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 90893
TYCHO-2 2000TYC 6632-1142-1
USNO-A2.0USNO-A2 0600-13401980
HIPHIP 51332

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