RY Sagittarii
| Observation data Epoch J2000.0 ICRS Equinox J2000.0 ICRS | |
|---|---|
| Constellation | Sagittarius |
| Right ascension | 19h 16m 32.76686s |
| Declination | −33° 31′ 20.3402″ |
| Apparent magnitude (V) | 5.8-14.0 |
| Characteristics | |
| Spectral type | G0Iaep (C1,0) |
| Variable type | R CrB |
| Astrometry | |
| Radial velocity (Rv) | −16.02 km/s |
| Proper motion (μ) | RA: 8.957 mas/yr Dec.: −0.277 mas/yr |
| Parallax (π) | 0.5880±0.0273 mas |
| Distance | 5,500 ± 300 ly (1,700 ± 80 pc) |
| Absolute magnitude (MV) | −5 |
| Details | |
| Radius | 60 R☉ |
| Luminosity | 9,120 L☉ |
| Temperature | 7,250 K |
| Other designations | |
| RY Sgr, CD−33 14076, HD 180093, HIP 94730, HR 7296, SAO 211117 | |
| Database references | |
| SIMBAD | data |
RY Sagittarii is a yellow supergiant and an R Coronae Borealis type variable star in the constellation Sagittarius. Although it ostensibly has the spectrum of a G-type star, it differs markedly from most in that it has almost no hydrogen and much carbon.