Upsilon Ursae Majoris
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Observation data Epoch J2000.0 |
|
---|---|
Constellation (pronunciation) |
Ursa Major |
Right ascension | 09h 50m 59.4s |
Declination | +59° 02' 19" |
Apparent magnitude (V) | +3.78 |
Distance | 115 ± 3 ly (35 ± 1 pc) |
Spectral type | F2IV |
Other designations | |
Upsilon Ursae Majoris (υ UMa / υ Ursae Majoris) is a binary star in the constellation Ursa Major. It is approximately 115 light years from Earth.
The primary component, Upsilon Ursae Majoris A, is a yellow-white F-type subgiant with a mean apparent magnitude of +3.78. It is classified as a Delta Scuti type variable star and its brightness varies from magnitude +3.68 to +3.86 with a period of 3.18 hours. The companion, Upsilon Ursae Majoris B is a magnitude +11.5 star, 11.3 arcseconds away from the primary.