Nu Andromedae
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Nu Andromedae is a binary star system in the constellation Andromeda. Its Bayer designation is Latinized from ν Andromedae, and abbreviated Nu And or ν And, respectively. The system has an apparent visual magnitude of 4.5,[2] which is bright enough to be seen with the naked eye. Based on parallax measurements, it is located at a distance of approximately Script error: No such module "convert". from Earth.[1] The pair are drifting closer with a heliocentric radial velocity of –24 km/s.[6] Situated just over a degree to the west of this star is the Andromeda Galaxy.[12]
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Nu Andromedae is close spectroscopic binary[3] system with a period of 4.2828 days and a nearly circular orbit.[5] The primary component is a B-type main sequence star with a stellar classification of B5 V.[3] The fainter secondary has a classification of F8 V,[5] which makes it an F-type main sequence star. The pair is about 63 million years old.[3]
The pair have a peculiar velocity of Script error: No such module "val". relative to neighboring stars, which doesn't qualify it to be a runaway star system but does suggest it escaped its star cluster of origin. The trajectory indicates it may have left the NGC 6405 cluster some 25 million years ago.[13]
Naming
In Chinese, Script error: No such module "Lang". (Script error: No such module "Lang".), meaning Legs (asterism), refers to an asterism consisting of ν Andromedae, η Andromedae, 65 Piscium, ζ Andromedae, ε Andromedae, δ Andromedae, π Andromedae, μ Andromedae, β Andromedae, σ Piscium, τ Piscium, 91 Piscium, υ Piscium, φ Piscium, χ Piscium and ψ1 Piscium. Consequently, the Chinese name for ν Andromedae itself is Script error: No such module "Lang". (Script error: No such module "Lang"., Template:Langx.)[14]
References
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- ↑ Template:In lang AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 5 月 19 日 Script error: No such module "webarchive".
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External links
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