Zeta Orionis vs Delta Orionis
Spectroscopy puts them in the same box — O-type for Zeta Orionis as for Delta Orionis — so the differences lie elsewhere. Intrinsically the balance shifts: Zeta Orionis 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 Zeta Orionis and 692 for Delta Orionis. Apparent magnitudes of +1.74 and +2.25 place Zeta Orionis some 1.6 times brighter in the sky than Delta Orionis.
Property comparison
| Property | Zeta Orionis | Delta Orionis |
|---|---|---|
| Designação | 50Zet Ori | 34Del Ori |
| Constelação | Orion | Orion |
| Classe Espectral | Class O — O-type (Blue) | Class O — O-type (Blue) |
| Magnitude Aparente | +1.74 | +2.25 |
| Magnitude Absoluta | -5.03 | -4.38 |
| Distância | 736 ly | 692 ly |
| Massa | N/A | N/A |
| Raio | N/A | N/A |
| Temperatura | N/A | N/A |
| Luminosidade | N/A | N/A |
Full data for each star: Zeta Orionis · 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.