HD 203949
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Microscopium |
| Right ascension | 21h 26m 22.8745s |
| Declination | −37° 49′ 45.950″ |
| Apparent magnitude (V) | 5.62±0.01 |
| Characteristics | |
| Evolutionary stage | giant |
| Spectral type | K2III |
| Astrometry | |
| Radial velocity (Rv) | −83.50±0.16 km/s |
| Proper motion (μ) | RA: 168.257 mas/yr Dec.: −11.075 mas/yr |
| Parallax (π) | 12.6806±0.0577 mas |
| Distance | 257 ± 1 ly (78.9 ± 0.4 pc) |
| Absolute magnitude (MV) | +1.10 |
| Details | |
| Mass | 1.00±0.16 M☉ |
| Radius | 10.30±0.51 R☉ |
| Luminosity (bolometric) | 43.34±4.27 L☉ |
| Surface gravity (log g) | 2.415±0.044 cgs |
| Temperature | 4618±113 K |
| Metallicity [Fe/H] | 0.17±0.07 dex |
| Age | 7.29±3.06 Gyr |
| Other designations | |
| CD−38 14551, Gaia DR2 6583094222249556224, HIP 105854, HR 8200, TYC 7979-47-1, GSC 07979-00047, 2MASS J21262286-3749458 | |
| Database references | |
| SIMBAD | data |
HD 203949 is a K-type giant star 257 light-years away in the constellation of Microscopium. Its surface temperature is 4618±113 K. It is either on the red giant branch fusing hydrogen in a shell around a helium core, or more likely a red clump star currently fusing helium in its core. HD 203949 is enriched in heavy elements relative to the Sun, with a metallicity ([Fe/H]) of 0.17±0.07 dex. As is common for red giants, HD 203949 has an enhanced concentration of sodium and aluminium compared to iron.
Multiplicity surveys did not find any stellar companions around HD 203949 as of 2019.