Alpha Scuti
Alpha Scuti, Latinized from α Scuti, is an orange-hued star in the southern constellation of Scutum. Originally part of the Aquila constellation, Alpha Scuti was a latter designation of 1 Aquilae. It is faintly visible to the naked eye with an apparent visual magnitude of 3.83. Based upon an annual parallax shift of 16.38 mas as seen from the Earth, it is located around 199 light years from the Sun. It is moving away from the Sun with a radial velocity of +36.5 km/s.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Scutum |
| Right ascension | 18h 35m 12.42776s |
| Declination | −8° 14′ 38.6529″ |
| Apparent magnitude (V) | 3.83 |
| Characteristics | |
| Spectral type | K3III |
| U−B color index | +1.53 |
| B−V color index | +1.34 |
| Astrometry | |
| Radial velocity (Rv) | +36.50 km/s |
| Proper motion (μ) | RA: −17.00 mas/yr Dec.: −313.52 mas/yr |
| Parallax (π) | 16.38 ± 0.22 mas |
| Distance | 199 ± 3 ly (61.1 ± 0.8 pc) |
| Absolute magnitude (MV) | −0.08 |
| Details | |
| Mass | 1.33 M☉ |
| Radius | 20 R☉ |
| Luminosity | 186 L☉ |
| Surface gravity (log g) | 1.96 cgs |
| Temperature | 4,315 K |
| Metallicity [Fe/H] | −0.04 dex |
| Rotational velocity (v sin i) | 1.7 km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
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