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HD 65683


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Light variations of massive stars (Alpha Cygni variables). IX
High-precision VBLUW photometry of 22 highly luminous OBA-type stars, 13of which are Alpha Cygni variables and two of which are variable only incolor, is presented. It is suggested that sigma (V-B) increases fasterthan sigma (B-L) with later spectral types due to the absence ofstochastic metal line strength variations in the V band. It is assumedthat short-time-scale stellar spot activity is present, or thattemperature and density waves move through the atmospheres with the sametime scales, producing these line strength variations independent of thecontinuum variations. The possibility of differentiating stars which lieclose to each other in the HR diagram but have different evolutionaryhistories (and thus different metal abundances) with the aid of themaximum light amplitude/sigma (V-B) diagram is considered.

Five-channel photometry of cepheids and supergiants in the southern Milky Way.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1976A&AS...24..413P&db_key=AST

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Observation and Astrometry data

Constellation:Πρύμνη
Right ascension:07h58m12.11s
Declination:-39°36'47.1"
Apparent magnitude:7.979
Distance:333.333 parsecs
Proper motion RA:-13.2
Proper motion Dec:12
B-T magnitude:7.974
V-T magnitude:7.979

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 65683
TYCHO-2 2000TYC 7650-1425-1
USNO-A2.0USNO-A2 0450-05423291
HIPHIP 38955

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