| Observation data Epoch J2000.0 Equinox J2000.0 |
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|---|---|
| Constellation | Canis Major |
| Right ascension | 06h56m08.2s |
| Declination | −17°03′15″ |
| Apparent magnitude (V) | +4.36 |
| Distance | 3100 ± 1900 ly (940 ± 580 pc) |
| Spectral type | B3II |
| Other designations | |
Iota Canis Majoris (ι CMa, ι Canis Majoris) is a star in the constellation Canis Major.
ι Canis Majoris is a blue-white B-type bright giant with a mean apparent magnitude of +4.36. It is approximately 3100 light years from Earth. It is classified as a Beta Cephei type variable star and its brightness varies from magnitude +4.36 to +4.40 with a period of 1.92 hours.
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