Theta UMa

HIP 46853; Theta UMa; 25 UMa Star Ursa Major (UMa) Visible Level 1 Naked eye / Binoculars

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Physical Properties

Magnitude 3.17

Spectral Type F7V

Star Color Yellow (B-V 0.46)

Distance 44 ly

Position & Identifiers

RA 09h 32m 51.4s

Dec +51° 40' 38.0"

Constellation Ursa Major (UMa)

HR 3775

HIP 46853

Bayer Theta

Flamsteed 25 UMa

Double Cat 7420

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Spectral Classification

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Stellar Notes

Double Star

CPM.

Spectroscopic Binary

371.0d, K 4.3k/s, V0 +13.0k/s, asini 21.24. Orbit questioned by Morbey and Griffin (1987, ApJ, 317, 343). | Unresolved by speckle interferometry.

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