Nu2 Arae
From Infogalactic: the planetary knowledge core
- For other star systems with this Bayer designation, see Nu Arae.
 The location of ν2 Arae (circled) |
|
| Observation data Epoch J2000.0 Equinox J2000.0 |
|
|---|---|
| Constellation | Ara |
| Right ascension | 17h 51m 11.04615s[1] |
| Declination | –53° 07′ 48.9721″[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: +15.79[1] mas/yr Dec.: +0.08[1] mas/yr |
| Parallax (π) | 6.41 ± 0.43[1] mas |
| Distance | 510 ± 30 ly (160 ± 10 pc) |
| Other designations | |
Nu2 Arae (ν2 Arae, ν2 Ara) is the Bayer designation for a star in the southern constellation of Ara. It is approximately 510 light-years (160 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).[6]
References
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- Aladin previewer: Image of HD 161917
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- ↑ 2.0 2.1 2.2 Lua error in package.lua at line 80: module 'strict' not found.
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- ↑ Note for HR 6632
