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HD 190056 is a class K1III[3] (orange giant) star in the constellation Sagittarius. Its apparent magnitude is 4.99[2] and it is approximately 291 light years away based on parallax.[1]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Sagittarius |
| Right ascension | 20h 04m 19.59387s[1] |
| Declination | −32° 03′ 22.6729″[1] |
| Apparent magnitude (V) | 4.99[2] |
| Characteristics | |
| Spectral type | K1III[3] |
| U−B color index | +1.18[4] |
| B−V color index | +1.21[4] |
| Variable type | suspected[5] |
| Astrometry | |
| Radial velocity (Rv) | -11.80[6] km/s |
| Proper motion (μ) | RA: +45.07[1] mas/yr Dec.: -11.74[1] mas/yr |
| Parallax (π) | 11.22 ± 0.25 mas[1] |
| Distance | 291 ± 6 ly (89 ± 2 pc) |
| Absolute magnitude (MV) | 0.24[2] |
| Details | |
| Mass | 1.48[7] M☉ |
| Radius | 19[7] R☉ |
| Luminosity | 121[2] L☉ |
| Surface gravity (log g) | 2.05[7] cgs |
| Temperature | 4,467[7] K |
| Metallicity [Fe/H] | -0.53[2] dex |
| Rotational velocity (v sin i) | < 1.0[8] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
It is a suspected variable,[5] and the primary has one companion, B, with magnitude 12.7 and separation 54.4".[9]
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