HD 203949
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.
| 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 | |
| Database references | |
| SIMBAD | data |
Multiplicity surveys did not find any stellar companions around HD 203949 as of 2019.
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