58 Ophiuchi
Star in the constellation Ophiuchus
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58 Ophiuchi is a single[9] star in the equatorial constellation of Ophiuchus. It is visible to the naked eye as a faint, yellow-white hued star with an apparent visual magnitude of 4.86.[2] This object is approximately 57.6 light years away based on parallax,[1] and is drifting further from the Earth with a heliocentric radial velocity of +10 km/s.[5]
 | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Ophiuchus |
| Right ascension | 17h 43m 25.79370s[1] |
| Declination | −21° 40′ 59.4980″[1] |
| Apparent magnitude (V) | 4.86[2] |
| Characteristics | |
| Spectral type | F5V[3] |
| U−B color index | -0.03[4] |
| B−V color index | +0.47[4] |
| Astrometry | |
| Radial velocity (Rv) | +10.20[5] km/s |
| Proper motion (μ) | RA: −97.54[1] mas/yr Dec.: −44.56[1] mas/yr |
| Parallax (π) | 56.65±0.24 mas[1] |
| Distance | 57.6 ± 0.2 ly (17.65 ± 0.07 pc) |
| Absolute magnitude (MV) | 3.63[2] |
| Details[6] | |
| Mass | 1.20 M☉ |
| Radius | 1.43±0.05 R☉ |
| Luminosity | 3.02[2] L☉ |
| Surface gravity (log g) | 4.21±0.10 cgs |
| Temperature | 6,305±80 K |
| Metallicity [Fe/H] | −0.16±0.06 dex |
| Rotational velocity (v sin i) | 12.2±0.7 km/s |
| Age | 2.652[7] Gyr |
| Other designations | |
| 58 Oph, BD−21°4712, FK5 1463, GC 24030, GJ 692, HD 160915, HIP 86736, HR 6595, SAO 185660[8] | |
| Database references | |
| SIMBAD | data |
This is an ordinary F-type main-sequence star with a stellar classification of F5V.[3] It is 2.7[7] billion years old with a projected rotational velocity of 12 km/s. The star has an estimated 1.2 times the mass of the Sun and 1.43 times the Sun's radius.[6] It is radiating three[2] times the luminosity of the Sun from its photosphere at an effective temperature of 6,305 K.[6]