| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Ara |
| Right ascension | 17h 23m 16.0752s |
| Declination | -47° 28′ 05.508″ |
| Apparent magnitude (V) | 5.245 |
| Characteristics | |
| Spectral type | B2IIIne |
| U−B color index | -0.82 |
| B−V color index | -0.11 |
| R−I color index | -0.08 |
| Variable type | Gamma Cas variable |
| Astrometry | |
| Radial velocity (Rv) | -19 km/s |
| Proper motion (μ) | RA: -6.66 mas/yr Dec.: -17.63 mas/yr |
| Parallax (π) | 4.52 ± 0.81 mas |
| Distance | approx. 700 ly (approx. 220 pc) |
| Absolute magnitude (MV) | 5.126 |
| Details | |
| Mass | 18 M☉ |
| Radius | 7 R☉ |
| Luminosity | 2.5 L☉ |
| Temperature | 10,000–30,000 K |
| Rotation | 369 km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Data sources: | |
| Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.) |
|
| Database references | |
| SIMBAD | data |
Iota Arae (ι Ara, ι Arae) is a star in the constellation Ara. It is approximately 720 light years from Earth.
This is a (Be star) blue-white B-type giant with a mean apparent magnitude of +5.21. It is classified as a Gamma Cassiopeiae-type variable star and its brightness varies from magnitude +5.18 to +5.26.
|
||||||||||||||