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TYC 4249-2207-1


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UVBY beta photometry of peculiar B and A stars, discovered at Abastumani
Stromgren uvby photometry for 70 peculiar Bp, Ap, or Am type stars ispresented. The model grid of Relyea and Kurucz (1978) is used to obtaineffective temperatures and log g values, confirming the dwarf-nature ofAm stars. Good agreement is found between effective temperatures andequivalent spectral classes derived from the (b-y)0 values, although theA4-A5 stars in this sample may be cooler than normal stars ofluminosity-class III-V in this spectral range.

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Observation and Astrometry data

Constellation:ケフェウス座
Right ascension:21h38m59.14s
Declination:+61°48'05.5"
Apparent magnitude:8.857
Distance:456.621 parsecs
Proper motion RA:12.5
Proper motion Dec:1.8
B-T magnitude:10.603
V-T magnitude:9.002

Catalogs and designations:
Proper Names
TYCHO-2 2000TYC 4249-2207-1
USNO-A2.0USNO-A2 1500-08234721
HIPHIP 106892
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