R Boötis
From Wikipedia, the free encyclopedia
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Boötes |
| Right ascension | 14h 37m 11.5787s |
| Declination | +26° 44′ 11.663″ |
| Apparent magnitude (V) | 8.61 |
| Characteristics | |
| Spectral type | M4e |
| Variable type | Mira variable R Boo |
| Astrometry | |
| Radial velocity (Rv) | -58 km/s |
| Proper motion (μ) | RA: -22.61 mas/yr Dec.: 12.50 mas/yr |
| Parallax (π) | -1.96 ± 1.24 mas |
| Distance | approx. −2,000 ly (approx. −500 pc) |
| Absolute magnitude (MV) | 9.77 |
| Details | |
| Mass | 0.4 M☉ |
| Radius | 0.5 R☉ |
| Luminosity | 0.04 L☉ |
| Temperature | 2,000–3,500 K |
| Other designations | |
HIP 71490, SAO 83440, BD+27° 2400, HD 128609. | |
| Database references | |
| SIMBAD | data |
| Data sources: | |
| Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.) | |
R Boötis is a variable star in the constellation Boötes.
References
Coordinates: 
14h 37m 11.5787s, +26° 44′ 11.663″
This article is issued from Wikipedia. The text is available under the Creative Commons Attribution/Share Alike; additional terms may apply for the media files.