Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Scorpius |
Right ascension | 17h 36m 10.1193s[1] |
Declination | −33° 29′ 40.617″[1] |
Apparent magnitude (V) | 8.79[2] |
Characteristics | |
Evolutionary stage | Red supergiant |
Spectral type | M0Ia[2] |
Astrometry | |
Radial velocity (Rv) | −18.71±0.9[1] km/s |
Proper motion (μ) | RA: −0.057±0.049 mas/yr[1] Dec.: −1.386±0.037 mas/yr[1] |
Parallax (π) | 0.3169 ± 0.0361 mas[1] |
Distance | approx. 10,000 ly (approx. 3,200 pc) |
Details[3] | |
Radius | 1,359 R☉ |
Luminosity | 361,000 L☉ |
Surface gravity (log g) | -0.24[4] cgs |
Temperature | 3,790 K |
Metallicity [Fe/H] | +0.15[4] dex |
Other designations | |
Database references | |
SIMBAD | data |
Trumpler 27-1 is a red supergiant star that is a member of the massive, possible open cluster Trumpler-27, where a blue giant star, a yellow supergiant star, and two Wolf–Rayet stars are also located.