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HD 149430


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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.

Measurements of double stars 1993.67 - 1998.13
624 Micrometer Measurements of 224 pairs with a 32.5 cm Cassegrain, 719Measurements of 310 double stars with a 360 mm Newtonian are given.Tables 1 to 4 are available in electronic form only at the CDS130.79.128.5 or via http://cdsweb.u-strasbg.fr/Abstract.html

Double Star Measurements Made at Nice
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1993A&AS..102..643M&db_key=AST

A Note about the Comparison Between the Old and New Slettebak Systems of Axial Rotational Velocities
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1984RMxAA...9....9G&db_key=AST

Rotational Velocities of Some B Stars
Not Available

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Osservazione e dati astrometrici

Costellazione:Dragone
Ascensione retta:16h31m36.86s
Declinazione:+57°45'50.7"
Magnitudine apparente:8.531
Distanza:165.017 parsec
Moto proprio RA:52.3
Moto proprio Dec:-28.5
B-T magnitude:8.783
V-T magnitude:8.552

Cataloghi e designazioni:
Nomi esatti   (Edit)
HD 1989HD 149430
TYCHO-2 2000TYC 3884-1836-1
USNO-A2.0USNO-A2 1425-08544582
HIPHIP 80934
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