Epsilon Octantis
 Location of ε Octantis (circled) |
|
| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Octans |
| Right ascension | 22h 20m 01.67970s |
| Declination | −80° 26′ 23.0947″ |
| Apparent magnitude (V) | 5.09 |
| Characteristics | |
| Spectral type | M5III |
| U−B color index | +1.18 |
| B−V color index | +1.47 |
| Variable type | SRb |
| Astrometry | |
| Radial velocity (Rv) | +11.70 km/s |
| Proper motion (μ) |
RA: +56.81 mas/yr Dec.: -43.47 mas/yr |
| Parallax (π) | 11.22 ± 0.23mas |
| Distance | 291 ± 6 ly (89 ± 2 pc) |
| Absolute magnitude (MV) | 0.34 |
| Details | |
| Mass | 1.34 M☉ |
| Radius | 16 R☉ |
| Luminosity | 120 L☉ |
| Surface gravity (log g) | 2.15 cgs |
| Temperature | 4,365 K |
| Other designations | |
| Database references | |
| SIMBAD | data |
Epsilon Octantis (ε Oct) is a class M5III (red giant) star in the constellation Octans. Its apparent magnitude is 5.09 and it is approximately 291 light years away based on parallax.
It is a semiregular variable with a magnitude range of 4.58 to 5.3 and a (poorly defined) period around 55 days.
...
Wikipedia