Alnitak vs Delta Orionis
Spectroscopy puts them in the same box — O-type for Alnitak as for Delta Orionis — so the differences lie elsewhere. Intrinsically the balance shifts: Alnitak carries an absolute magnitude of −5.03 against −4.38 for Delta Orionis, making it about 1.8 times more luminous once distance is removed from the comparison. Both lie at a comparable distance from the Sun — 736 light-years for Alnitak and 692 for Delta Orionis. Apparent magnitudes of +1.74 and +2.25 place Alnitak some 1.6 times brighter in the sky than Delta Orionis.
Property comparison
| Property | Alnitak | Delta Orionis |
|---|---|---|
| Désignation | 50Zet Ori | 34Del Ori |
| Constellation | Orion | Orion |
| Classe Spectrale | Class O — O-type (Blue) | Class O — O-type (Blue) |
| Magnitude Apparente | +1.74 | +2.25 |
| Magnitude Absolue | -5.03 | -4.38 |
| Distance | 736 ly | 692 ly |
| Masse | N/A | N/A |
| Rayon | N/A | N/A |
| Température | N/A | N/A |
| Luminosité | N/A | N/A |
Full data for each star: Alnitak · Delta Orionis
Key differences
Key Differences
- ◆ Both are O-type stars in Orion's Belt, but Alnitak is the eastern star and Mintaka the western.
- ◆ Alnitak is the brightest O-type star in the night sky; Mintaka lies almost exactly on the celestial equator.
- ◆ Alnitak is near the Horsehead Nebula and Flame Nebula which it illuminates with its intense UV radiation.
- ◆ Both are multiple star systems containing O-type primaries.
- ◆ Alnitak is somewhat more massive and more distant than Mintaka.