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HD 257101


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Far-ultraviolet stellar photometry - A field in Monoceros
FUV photometry of stars in a field in Monoceros in the wavelength rangefrom 1230 to 1600 A has been carried out using data from anelectrographic Schmidt camera carried on a sounding rocket. Ultravioletmagnitudes were extracted for 602 objects in the field. Fifty-eightpercent were tentatively identified with visible stars using the SIMBADdata base while another 25 percent are blends of objects too closetogether to separate with our resolution. Eleven of the UV objectscoincide with parts of the star clusters NGC 2169, NGC 2244, and NGC2264 in which individual stars cannot be resolved. As in previousstudies, the majority of the identified ultraviolet sources areidentified with early-stars. However, there are a significant number forwhich no such identification was possible, and we suggest that many ofthese are nearby white dwarfs.

Catalog of BV magnitudes and spectral classes of 6000 stars
The present catalog, compiled at the Abastumani Observatory, contains BVmagnitudes and spectral classes of about 6000 stars up to V(lim) = 13.0min five circular areas of 18 sq deg located near the salactic-equatorplane. The catalog is intended for star-statistics studies ofstar-formation regions.

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Datos observacionales y astrométricos

Constelación:Unicornio
Ascensión Recta:06h25m37.69s
Declinación:+04°51'01.3"
Magnitud Aparente:9.452
Movimiento Propio en Ascensión Recta:0.1
Movimiento Propio en Declinación:-2.4
B-T magnitude:9.667
V-T magnitude:9.47

Catálogos y designaciones:
Nombres Propios   (Edit)
HD 1989HD 257101
TYCHO-2 2000TYC 141-1809-1
USNO-A2.0USNO-A2 0900-02918655

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