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HD 99837


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Two-colour photometry for 9473 components of close Hipparcos double and multiple stars
Using observations obtained with the Tycho instrument of the ESAHipparcos satellite, a two-colour photometry is produced for componentsof more than 7 000 Hipparcos double and multiple stars with angularseparations 0.1 to 2.5 arcsec. We publish 9473 components of 5173systems with separations above 0.3 arcsec. The majority of them did nothave Tycho photometry in the Hipparcos catalogue. The magnitudes arederived in the Tycho B_T and V_T passbands, similar to the Johnsonpassbands. Photometrically resolved components of the binaries withstatistically significant trigonometric parallaxes can be put on an HRdiagram, the majority of them for the first time. Based on observationsmade with the ESA Hipparcos satellite.

Micrometer Measurements of Southern Double Stars made at the National Observatory of Llano del Hato, Venezuela
This paper reports 151 micrometer measurements of 66 double starsobserved with the 65-cm refractor at the Venezuelan National Observatoryat Llano del Hato, Mérida, during February 1997 and February1998.

ICCD speckle observations of binary stars. V - Measurements during 1988-1989 from the Kitt Peak and the Cerro Tololo 4 M telescopes
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1990AJ.....99..965M&db_key=AST

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Osservazione e dati astrometrici

Costellazione:Cratere
Ascensione retta:11h28m58.64s
Declinazione:-24°46'01.0"
Magnitudine apparente:8.498
Distanza:10000000 parsec
Moto proprio RA:-12.8
Moto proprio Dec:-6.5
B-T magnitude:8.635
V-T magnitude:8.51

Cataloghi e designazioni:
Nomi esatti   (Edit)
HD 1989HD 99837
TYCHO-2 2000TYC 6655-433-1
USNO-A2.0USNO-A2 0600-14173691
HIPHIP 56025
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