Delta Sagittarii
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Sagittarius |
| Right ascension | 18h 20m 59.64354s |
| Declination | −29° 49′ 41.1659″ |
| Apparent magnitude (V) | +2.70 |
| Characteristics | |
| Spectral type | K3 III |
| U−B color index | +1.55 |
| B−V color index | +1.38 |
| Astrometry | |
| Radial velocity (Rv) | –19.9 km/s |
| Proper motion (μ) | RA: +32.54 mas/yr Dec.: −25.57 mas/yr |
| Parallax (π) | 9.38±0.18 mas |
| Distance | 348 ± 7 ly (107 ± 2 pc) |
| Absolute magnitude (MV) | −1.99 |
| Details | |
| δ Sgr A | |
| Mass | 3.21 M☉ |
| Radius | 76.83 R☉ |
| Luminosity | 1,660 L☉ |
| Surface gravity (log g) | 0.30 cgs |
| Temperature | 4,203±69 K |
| Metallicity [Fe/H] | −0.32 dex |
| Rotational velocity (v sin i) | 3.6 km/s |
| Age | 260 Myr |
| Other designations | |
| Kaus Media, Kaus Meridionalis, Media, δ Sgr, CPD−30°5513, FK5 687, GC 25024, HD 168454, HIP 89931, HR 6859, SAO 186681, PPM 268275, CCDM J18210-2950A, WDS J18210-2950A | |
| Database references | |
| SIMBAD | Delta Sagittarii |
Delta Sagittarii (δ Sagittarii, abbreviated Delta Sgr, δ Sgr), formally named Kaus Media /ˌkɔːs ˈmiːdiə/, is a star in the southern zodiac constellation of Sagittarius. The apparent visual magnitude of this star is +2.70, making it easily visible to the naked eye. Parallax measurements place the distance at roughly 348 light-years (107 parsecs) from the Sun.