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Empirical temperature calibrations for early-type stars
Three temperature calibrations of suitable photometric quantities havebeen derived for O and B stars. A sample of 120 stars with reliableT(eff.) determinations has been used for establishing each calibration.The different calibrations have been critically discussed and compared.Temperature determinations for 1009 program stars have been obtainedwith an accuracy of the order of 10 percent.
| H-beta photometry of southern early-type stars
H-beta photoelectric photometry is presented for 209 southern hemisphereearly-type stars from the HD catalog with galactic latitudes /b/ greaterthan 6 deg. Four-color photometry exists for all these stars and MKtypes for most of them. Absolute magnitudes have been estimated for allbut the emission-line stars and distances from the sun and the galacticplane determined.
| Four colour photometry of southern early-type stars.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1978MNRAS.182..629K&db_key=AST
| UBV Photometry of 500 Southern Stars [erratum: 1973MNSSA..32...48C]
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Member of following groups:
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Observation and Astrometry data
| Constellation: | りゅうこつ座 |
| Right ascension: | 08h09m31.22s |
| Declination: | -52°34'28.1" |
| Apparent magnitude: | 7.242 |
| Distance: | 487.805 parsecs |
| Proper motion RA: | -9.5 |
| Proper motion Dec: | 5.1 |
| B-T magnitude: | 7.208 |
| V-T magnitude: | 7.24 |
Catalogs and designations:
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