| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Boötes |
| Right ascension | 14h 43m 25.3632s |
| Declination | +26° 31′ 40.261″ |
| Apparent magnitude (V) | 4.827 |
| Characteristics | |
| Spectral type | M3III |
| U−B color index | 1.94 |
| B−V color index | 1.66 |
| R−I color index | 1.22 |
| Variable type | Semi-regular |
| Astrometry | |
| Radial velocity (Rv) | 5.6 km/s |
| Proper motion (μ) | RA: -13.29 mas/yr Dec.: -16.68 mas/yr |
| Parallax (π) | 3.67 ± 0.94 mas |
| Distance | approx. 900 ly (approx. 270 pc) |
| Absolute magnitude (MV) | -2.5 |
| Details | |
| Mass | 4.4 M☉ |
| Radius | 110 R☉ |
| Luminosity | 830 L☉ |
| Temperature | 3300 K |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Data sources: | |
| Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.) |
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34 Boötis or W Boötis is a star in the constellation Boötes.
34 Boötis is a M-type red giant with a mean apparent magnitude of +4.80. It is approximately 890 light years from Earth. It is classified as a semiregular variable star and its brightness varies from magnitude +4.73 to +5.4 with a period of 450 days.
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