Nu2 Boötis
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Boötes |
| Right ascension | 15h 31m 46.9817s |
| Declination | +40° 53′ 57.597″ |
| Apparent magnitude (V) | 4.997 |
| Characteristics | |
| Spectral type | A5V |
| U−B color index | 0.11 |
| B−V color index | 0.07 |
| R−I color index | 0.04 |
| Astrometry | |
| Radial velocity (Rv) | -16.6 km/s |
| Proper motion (μ) | RA: -13.73 mas/yr Dec.: -14.92 mas/yr |
| Parallax (π) | 7.59 ± 0.55 mas |
| Distance | 430 ± 30 ly (132 ± 10 pc) |
| Absolute magnitude (MV) | 5.093 |
| Details | |
| Mass | 3.1 M☉ |
| Radius | 2.1 R☉ |
| Luminosity | 40 L☉ |
| Temperature | 7,500–10,000 K |
| Rotational velocity (v sin i) | 182 km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Data sources: | |
| Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.) | |
| Database references | |
| SIMBAD | data |
Nu2 Boötis is a spectroscopic binary approximately 430 light years from Earth. The primary component, ν2 Boötis A, is a white A-type main sequence dwarf with an apparent magnitude of +4.98. Its companion, ν2 Boötis B is separated from the primary by less than 0.1 arcseconds. The binary has an orbital period of 8.48 years.
References
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