23 Ursae Majoris
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| Observation data Equinox J2000.0 (ICRS) |
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|---|---|
| Constellation | Ursa Major |
| Right ascension | 09h 31m 31.708s / 28.2s |
| Declination | +63° 03′ 42.70″ / 43″ |
| Apparent magnitude (V) | +3.65 / +9.0 |
| Absolute magnitude (V) | +1.83 / +7.18 |
| Distance | 75.5 ± 1.1 ly (23.1 ± 0.3 pc) |
| Spectral type | A: F0IV |
| Other designations | |
| Observation data Equinox J2000.0 (ICRS) |
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|---|---|
| Constellation | Ursa Major |
| Right ascension | 09h 31m 18.7s |
| Declination | +63° 02′ 38″ |
| Apparent magnitude (V) | +10.5 |
| Other designations | |
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CCDM J09315+6303C; also, see designations for 23 Ursae Majoris A/B.
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23 Ursae Majoris, or 23 UMa, is a triple star in the constellation Ursa Major. Its main components, 23 UMa A and 23 UMa B, are approximately 75.5 light years from Earth.
The primary component, 23 Ursae Majoris A, is a yellow-white F-type subgiant with an apparent magnitude of +3.65. At a separation of 22.7 arcseconds is the 9th magnitude 23 Ursae Majoris B. A and B form a physical binary. The third, optical, component, 23 Ursae Majoris C, is a magnitude +10.5 star 99.6 arcseconds away.
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