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HD 109793


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Optical identifications of the IRAS faint sources in the Virgo cluster area.
This paper presents a study on the deep optical identifications of 369IRAS faint sources in a 102 square degree area centered on the Virgocluster. We obtained the positions and magnitudes of candidates fromfour UK Schmidt Telescope IIIa-J direct plates. 89 (24%) are identifiedas stars and 276 (75%) as galaxies. There are 4 (1%) empty fields to theplate limit of B=~22. The infrared-optical database for 193 FSC-onlysources is given. Most of the IRAS galaxy sources are spirals. There are83 IRAS galaxy sources being regarded as the cluster members by Binggeliet al. (1985). In our sample, a correlation between the luminosity ratioL_IR_/L_B_ and the infrared flux ratio F(100μm)/F(60μm) isevident. For the member galaxies, a weak correlation between L_IR_/L_B_and L_IR_ is also found.

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Observation and Astrometry data

Constellation:Jungfrau
Right ascension:12h37m22.14s
Declination:+12°59'01.0"
Apparent magnitude:8.208
Distance:641.026 parsecs
Proper motion RA:-19.6
Proper motion Dec:4.4
B-T magnitude:9.354
V-T magnitude:8.303

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 109793
TYCHO-2 2000TYC 881-980-1
USNO-A2.0USNO-A2 0975-06997716
HIPHIP 61600

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