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| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Ara |
| Right ascension | 17h51m 11.04526s[1] |
| Declination | –53° 07′ 48.9705″[1] |
| Apparent magnitude (V) | 6.10[2] |
| Characteristics | |
| Spectral type | B9.5 III-IV[3] |
| B−V color index | +0.01[2] |
| Astrometry | |
| Radial velocity (Rv) | +18.8±1.2[4] km/s |
| Proper motion (μ) | RA: +14.855[1] mas/yr Dec.: +0.548[1] mas/yr |
| Parallax (π) | 5.7499 ± 0.1048 mas[1] |
| Distance | 570 ± 10 ly (174 ± 3 pc) |
| Absolute magnitude (MV) | +0.14[5] |
| Details | |
| Luminosity | 85[5] L☉ |
| Other designations | |
ν2 Ara, CD−53° 7430, HD 161917, HIP 87379, HR 6632, SAO 245072[6] | |
| Database references | |
| SIMBAD | data |
Nu2 Arae, Latinized from ν2 Arae, is the Bayer designation for a star in the southern constellationofAra. It is approximately 570 light-years (170 parsecs) from the Earth and is faintly visible to the naked eye with an apparent visual magnitude of 6.10.[2] The stellar classification of B9.5 III-IV[3] shows this to be a B-type star with a spectrum that displays features part way between the subgiant and giant star stages.
The star is sometimes referred as Upsilon2 Arae (υ2 Arae).[7]
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