| Observation data Epoch J2000.0 Equinox J2000.0 |
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|---|---|
| Constellation | Perseus |
| Right ascension | 3h 42m 55.5s |
| Declination | 47° 47' 15" |
| Apparent magnitude (V) | 3.01 |
| Distance | 527 ly (161.66 pc) |
| Spectral type | B5III |
| Other designations | |
Delta Persei (δ Per, δ Persei) is a Class B5III, third-magnitude star in the constellation Perseus. Delta Persei is actually a blue giant star that is the second brightest star of the open star cluster known as the Alpha Persei, second only to Mirfak. The Delta Persei stellar system is located about 530 light-years from Earth.
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