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HD 100893

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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.
Radial velocities of southern stars obtained with the photoelectric scanner CORAVEL. III - 790 late-type bright stars Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1985A&AS...59...15A&db_key=AST
Close visual binaries. I - MK classifications Each component of 170 close visual binaries has been classified with newprocedures for controlling contamination problems. These classificationsare presented and are shown to be on the MK system. Two sources of areascanner UBV photometry were compared in order to establish homogeneousphotometric as well as spectroscopic data. From a consideration ofsystematic errors in the V magnitude difference (Delta V) betweencomponents the photometry of Hurly and Warner (1983) is to be preferred.Absolute magnitudes for each binary are derived from Delta V via atested MK - M(v) map.
Area Scanner Observations of Close Visual Double Stars - Part Two - Results for 153 Southern Stars Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1983MNRAS.202..761H&db_key=AST
Photometric differences of magnitude in southern double stars Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1980A&A....84..108F&db_key=AST
Combined-light UBV Photometry of 103 Bright Southern Visual Doubles Not Available
Photoelectric determination of the colors of 286 stars south of declination -15 degrees. Not Available

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Osservazione e dati astrometrici

Costellazione:	Idra
Ascensione retta:	11^h36^m35.00^s
Declinazione:	-33Â°34'12.0"
Magnitudine apparente:	5.74
Distanza:	108.108 parsec
Moto proprio RA:	31.2
Moto proprio Dec:	-29.7
B-T magnitude:	7.232
V-T magnitude:	6.014

Cataloghi e designazioni:

Nomi esatti	(Edit)
HD 1989	HD 100893
TYCHO-2 2000	TYC 7220-1534-1
USNO-A2.0	USNO-A2 0525-14278971
BSC 1991	HR 4469
HIP	HIP 56620

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