| Observation data Epoch J2000.0 Equinox J2000.0 |
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|---|---|
| Constellation | Canis Major |
| Right ascension | 06h31m51.3s |
| Declination | −23°25′06″ |
| Apparent magnitude (V) | +4.34 |
| Distance | 2050 ± 900 ly (630 ± 280 pc) |
| Spectral type | B0.5IV |
| Other designations | |
Xi1 Canis Majoris (ξ1 CMa, ξ1 Canis Majoris) is a star in the constellation Canis Major. It is approximately 2051 light years from Earth.
ξ1 Canis Majoris is a blue-white B-type subgiant with a mean apparent magnitude of +4.34. It is classified as a Beta Cephei type variable star and its brightness varies from magnitude +4.33 to +4.36 with a period of 5.03 hours.
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