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HD 202506


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Visual multiples. VII - MK classifications
Classifications are given for 865 components of visual multiples; theyshow no systematic differences from the MK system, and the random errorsare one subclass in type and two-thirds of a luminosity class. It isfound that at least 1% of the F-type IV and V stars are weak-lined, 32%of the A4-F1 IV and V stars are Am, and 5% of the A0-A3 IV and V starsare early-type Am. Attention is called to the large fraction (55%) ofthe A3-A9 III-V stars that are of luminosity classes III or IV, unlikethe percentage (16%) at neighboring types.

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Observation and Astrometry data

Constellation:ケフェウス座
Right ascension:21h11m09.19s
Declination:+74°03'30.6"
Apparent magnitude:9.017
Distance:220.751 parsecs
Proper motion RA:12.4
Proper motion Dec:12.6
B-T magnitude:9.838
V-T magnitude:9.085

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 202506
TYCHO-2 2000TYC 4472-906-1
USNO-A2.0USNO-A2 1575-04610678
HIPHIP 104584

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