S Boötis
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Boötes |
| Right ascension | 14h 22m 52.9255s |
| Declination | +53° 48′ 37.307″ |
| Apparent magnitude (V) | 7.4 - 14.0 |
| Characteristics | |
| Evolutionary stage | AGB |
| Spectral type | M3e-6e |
| B−V color index | +1.3 |
| Variable type | Mira |
| Astrometry | |
| Radial velocity (Rv) | −17.00 km/s |
| Proper motion (μ) | RA: +7.283 mas/yr Dec.: −12.789 mas/yr |
| Parallax (π) | 0.5746±0.0407 mas |
| Distance | 5,700 ± 400 ly (1,700 ± 100 pc) |
| Details | |
| Mass | 2.7 M☉ |
| Radius | 491 R☉ |
| Luminosity | 18,793 L☉ |
| Surface gravity (log g) | −0.53 cgs |
| Temperature | 3,007 K |
| Age | 631 Myr |
| Other designations | |
| HIP 70291, SAO 29125, BD+54°1571, HD 126289 | |
| Database references | |
| SIMBAD | data |
S Boötis is a Mira variable in the constellation Boötes. It ranges between magnitudes 7.8 and 13.8 over a period of approximately 270 days. It is too faint to be seen with the naked eye, however when it is near maximum brightness it can be seen with binoculars.
S Boötis was discovered at Bonn Observatory by Friedrich Wilhelm Argelander in 1860.