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HD 724


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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.

A spectral survey of early-type stars in the region of Cassiopeia using an objective prism
Not Available

Micrometer observations of double stars.8.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1975ApJS...29..315H&db_key=AST

Micrometer Measures of Double Stars.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1961ApJS....6....1K&db_key=AST

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Observation and Astrometry data

Constellation:カシオペヤ座
Right ascension:00h11m50.44s
Declination:+66°07'34.8"
Apparent magnitude:7.448
Distance:502.513 parsecs
Proper motion RA:10.4
Proper motion Dec:-0.1
B-T magnitude:7.48
V-T magnitude:7.451

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 724
TYCHO-2 2000TYC 4026-213-1
USNO-A2.0USNO-A2 1500-00235175
HIPHIP 957
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