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η Arae in the Ara constellation |
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| Observation data Epoch J2000 Equinox J2000 |
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|---|---|
| Constellation | Ara |
| Right ascension | 16h 49m 47.1563s |
| Declination | -59° 02′ 28.961″ |
| Apparent magnitude (V) | 3.78 |
| Characteristics | |
| Spectral type | K5III |
| U−B color index | 1.94 |
| B−V color index | 1.57 |
| Astrometry | |
| Radial velocity (Rv) | 9 km/s |
| Proper motion (μ) | RA: 39.59 mas/yr Dec.: -25.28 mas/yr |
| Parallax (π) | 10.41 ± 0.69 mas |
| Distance | 310 ± 20 ly (96 ± 6 pc) |
| Absolute magnitude (MV) | 5.377 |
| Details | |
| Mass | 0.8 M☉ |
| Radius | 0.9 R☉ |
| Luminosity | 0.4 L☉ |
| Temperature | 3,500–5,000 K |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Data sources: | |
| Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.) |
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| Database references | |
| SIMBAD | data |
Eta Arae (η Ara, η Arae) or IDS 16411-5852 A is a double star in the constellation Ara. It is approximately 313 light years from Earth.
The brighter star is an orange K-type giant with an apparent magnitude of +3.77. It has a 14th magnitude companion, located 25.7 arcseconds away.
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