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HD 52578


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Weak-lined stars in the Michigan spectral survey. I - A-, F-, and G-type stars
Data from intermediate-band and H-beta photometric observations of 89early-type stars classified as weak-lined by Bidelman and MacConnell(1973), Houk and Cowley (1975), or Houk (1978 and 1982) are presented intables and graphs and analyzed. The group is found to comprise 55 diskstars and 34 halo stars (Fe/H less than -0.65), including 21 near themain-sequence turnoff, seven red horizontal-branch stars, one bluehorizontal-branch star, one suprahorizontal-branch object, and four bluestragglers; five of the newly identified halo stars are shown to haveradial velocities in excess of 100 km/s. Special consideration is givento the 17 early-type members of Kapetyn's star group (Eggen, 1977), andthe mean luminosity and Fe/H ratio of the four very-short-periodCepheids of this group are determined as 0.75 mag and -1.7.

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Observation and Astrometry data

Constellation:Τρόπις
Right ascension:06h59m02.23s
Declination:-51°41'31.1"
Apparent magnitude:9.167
Proper motion RA:-0.3
Proper motion Dec:-9
B-T magnitude:9.877
V-T magnitude:9.226

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 52578
TYCHO-2 2000TYC 8130-1273-1
USNO-A2.0USNO-A2 0375-02951605
HIPHIP 33613

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