  | |
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Telescopium |
| Right ascension | 19h 08m 52.32474s [1] |
| Declination | −55° 43′ 13.5297″ [1] |
| Apparent magnitude (V) | 6.45±0.01 [2] |
| Characteristics | |
| Spectral type | K1 III [3] or K1 IV [4] |
| B−V color index | +1.10 [5] |
| Astrometry | |
| Radial velocity (Rv) | −20.9±2.9 [6] km/s |
| Proper motion (μ) | RA: +56.586 mas/yr [1] Dec.: −115.876 mas/yr [1] |
| Parallax (π) | 8.6669±0.0269 mas [1] |
| Distance | 376 ± 1 ly (115.4 ± 0.4 pc) |
| Absolute magnitude (MV) | +1.03 [7] |
| Details | |
| Mass | 1.25 [8] M☉ |
| Radius | 10.6 [9] R☉ |
| Luminosity | 50.2+0.4 −0.3 [1] L☉ |
| Surface gravity (log g) | 2.52 [8] cgs |
| Temperature | 4,750±122 [10] K |
| Metallicity [Fe/H] | −0.10 [8] dex |
| Rotational velocity (v sin i) | <1.3 [11] km/s |
| Other designations | |
| 48 G. Telescopii [6] , CPD−55°9001, GC 26319, HD 177693, HIP 94054, HR 7233, SAO 245937, TIC 230953185 [12] | |
| Database references | |
| SIMBAD | data |
HD 177693 (HR 7233; 48 G. Telescopii) is a solitary orange-hued star located in the southern constellation Telescopium. It has an apparent magnitude of 6.45, [2] placing it near the limit for naked eye visibility, even under ideal conditions. Gaia DR3 parallax measurements imply a distance of 376 light-years, [1] and it is drifting closer with a heliocentric radial velocity of −20.9 km/s . [6] At its current distance, HD 177693's brightness is diminished by 0.24 magnitudes due to interstellar extinction [13] and it has an absolute magnitude of +1.03. [7]
HD 177693 has a stellar classification of K1 III, [3] indicating that it is an evolved orange giant. David Stanley Evans gave a less evolved class of K1 IV, [4] instead indicating that it is a slightly evolved subgiant. It has 1.25 times the mass of the Sun [8] but it has expanded to 10.6 times the radius of the Sun. [9] It radiates 50.2 times the luminosity of the Sun [1] from its enlarged photosphere at an effective temperature of 4,750 K . [10] HD 177693 is slightly metal deficient with an iron abundance of [Fe/H] = −0.10 [8] and it spins with a projected rotational velocity lower than 1.3 km/s . [11]
