| Observation data Epoch J2000.0 Equinox J2000.0 |
|
|---|---|
| Constellation | Norma |
| Right ascension | 16h 34m 05.0207s |
| Declination | -44° 02′ 43.133″ |
| Apparent magnitude (V) | 4.914 |
| Characteristics | |
| Spectral type | B0Ia |
| Apparent magnitude (U) | 4.14 |
| Apparent magnitude (B) | 4.951 |
| Apparent magnitude (J) | 4.912 |
| Apparent magnitude (H) | 4.679 |
| Apparent magnitude (K) | 4.612 |
| U−B color index | -0.811 |
| B−V color index | +0.0369 |
| Variable type | Suspected Alpha Cygni |
| Astrometry | |
| Radial velocity (Rv) | +8.6 km/s |
| Proper motion (μ) | RA: 0.52 mas/yr Dec.: -2.53 mas/yr |
| Parallax (π) | 0.70 ± 0.73 mas |
| Distance | 4,657.13 ly (1,428.57 pc) |
| Absolute magnitude (MV) | -5.86 |
| Details | |
| Mass | 30 M☉ |
| Radius | 15.4 R☉ |
| Luminosity | 210,000 L☉ |
| Temperature | 31,500 K |
| Age | ~4 million years |
| Other designations | |
Mu Normae is a blue supergiant star in the constellation Norma. Though it has an apparent magnitude of only 4.914, its absolute visual magnitude -5.86 and a bolometric luminosity of 210,000 times that of the Sun. This star is comparable to Epsilon Orionis (Alnilam) in that they are both of class B0 and are supergiants, but this star is less massive at a probable mass of 30 solar masses. Both stars are also suspected of being Alpha Cygni variables which are named after the also similar star Deneb. Being a blue supergiant, it is destined to become a red supergiant in a few million years and eventually a type-II supernova.