HD 176425
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  | |
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Corona Australis |
| Right ascension | 19h 02m 08.52100s[1] |
| Declination | −41° 54′ 37.8260″[1] |
| Apparent magnitude (V) | 6.21±0.01[2] |
| Characteristics | |
| Spectral type | A0 V[3] |
| B−V color index | 0.00[4] |
| Astrometry | |
| Radial velocity (Rv) | −12.8±4.3[5] km/s |
| Proper motion (μ) | RA: +30.557 mas/yr[1] Dec.: −11.271 mas/yr[1] |
| Parallax (π) | 9.1110±0.0417 mas[1] |
| Distance | 358 ± 2 ly (109.8 ± 0.5 pc) |
| Absolute magnitude (MV) | +0.75[6] |
| Details | |
| Mass | 2.63+0.38 −0.30[7] M☉ |
| Radius | 2.19±0.11[8] R☉ |
| Luminosity | 50.8+0.6 −0.7[1] L☉ |
| Surface gravity (log g) | 4.23+0.05 −0.07[7] cgs |
| Temperature | 10,163[9] K |
| Metallicity [Fe/H] | −0.10[10] dex |
| Age | 286±7[11][12] Myr |
| Other designations | |
| 38 G. Coronae Australis[13], CD−42°13839, CPD−42°8564, GC 26164, HD 176425, HIP 93470, HR 7177, SAO 229446[14] | |
| Database references | |
| SIMBAD | data |
HD 176425, also known as HR 7177 or rarely 38 G. Coronae Australis, is a solitary, bluish-white hued star located in the southern constellation Corona Australis. It has an apparent magnitude of 6.21,[2] placing it near the limit for naked eye visibility, even under ideal conditions. Gaia DR3 parallax measurements imply a distance of 358 light-years,[1] and it is currently drifting closer with a heliocentric radial velocity of −12.8 km/s.[5] At its current distance, HD 176425's brightness is diminished by an interstellar extinction factor of 0.27 magnitudes[15] and it has an absolute magnitude of +0.75.[6]
HD 176425 is an ordinary A-type main-sequence star with a stellar classification of A0 V.[3] It has been used as an unpolarized standard in the southern sky.[16] It has 2.63 times the mass of the Sun[7] and 2.19 times the radius of the Sun.[8] The object radiates 50.8 times the luminosity of the Sun[1] from its photosphere at an effective temperature of 10,163 K.[9] HD 176425 is metal deficient with an iron abundance 79% that of the Sun ([Fe/H] = −0.10)[10] and it is estimated to be 286 million years old.[11][12]
