9 Boötis
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Boötes |
| Right ascension | 13h 56m 34.1811s |
| Declination | +27° 29′ 31.496″ |
| Apparent magnitude (V) | 5.019 |
| Characteristics | |
| Spectral type | K3III |
| U−B color index | 1.72 |
| B−V color index | 1.42 |
| R−I color index | 0.75 |
| Variable type | Irregular |
| Astrometry | |
| Radial velocity (Rv) | -39.8 km/s |
| Proper motion (μ) | RA: 28.19 mas/yr Dec.: -47.76 mas/yr |
| Parallax (π) | 5.03 ± 0.78 mas |
| Distance | approx. 600 ly (approx. 200 pc) |
| Absolute magnitude (MV) | 6.487 |
| Details | |
| Mass | 0,8 M☉ |
| Radius | 0,9 R☉ |
| Luminosity | 0,4 L☉ |
| Temperature | 3,500–5,000 K |
| Rotation | < 19 km/s 0,006574611 Year |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Data sources: | |
| Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.) | |
9 Boötis is a variable star in the constellation Boötes.
9 Boötis is an orange K-type giant with an apparent magnitude of +5.02. It is approximately 648 light years from Earth.
References
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