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HD 109840


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Vacuum ultraviolet imagery of the Virgo cluster region
The results are reported of an experiment using the UV imager aboard anattitude-controlled S520 type sounding rocket. The total UV fluxes ofgalaxies in the Virgo Cluster as well as the flux level of the diffuseUV background around the cluster were measured. The data on NGC 4486 andNGC 4472 confirm the variation in the degree of the 'turnup' below 200nm in the energy spectrum of the total light of elliptical galaxies. Attwo-color diagram of galaxies of visual/near-UV/vacuum UV indicates thatcolors of spiral galaxies are distributed within a strip andwell-correlated with the morphological type, while elliptical galaxiesare located differently from spiral galaxies.

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Datos observacionales y astrométricos

Constelación:Virgo
Ascensión Recta:12h37m51.82s
Declinación:+04°17'19.0"
Magnitud Aparente:6.987
Distancia:107.759 parsecs
Movimiento Propio en Ascensión Recta:-26.2
Movimiento Propio en Declinación:-30.2
B-T magnitude:7.089
V-T magnitude:6.996

Catálogos y designaciones:
Nombres Propios   (Edit)
HD 1989HD 109840
TYCHO-2 2000TYC 292-948-1
USNO-A2.0USNO-A2 0900-07196884
HIPHIP 61628

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