Astronomy and Space

HD 166

HD 166 or V439 Andromedae (ADS 69 A) is a 6th magnitude star in the constellation Andromeda, approximately 45 light-years away from Earth. It is a variable star of the BY Draconis type, varying between magnitudes 6.13 and 6.18 with a 6.23 days periodicity. It appears within one degree of the star Alpha Andromedae and is a member of the Hercules-Lyra association moving group. It also happens to be less than 2 degrees from right ascension 00h 00m.

Also on this shelf

See also

• ▸Ferdinand (moon)
• ▸Aglaonema commutatum
• ▸2021

Uncatalogued shelf

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