58 Ophiuchi
58 Ophiuchi is a single 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. This object is approximately 57.6 light years away based on parallax, and is drifting further from the Earth with a heliocentric radial velocity of +10 km/s.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Ophiuchus |
| Right ascension | 17h 43m 25.79370s |
| Declination | −21° 40′ 59.4980″ |
| Apparent magnitude (V) | 4.86 |
| Characteristics | |
| Spectral type | F5V |
| U−B color index | -0.03 |
| B−V color index | +0.47 |
| Astrometry | |
| Radial velocity (Rv) | +10.20 km/s |
| Proper motion (μ) | RA: -97.54 mas/yr Dec.: -44.56 mas/yr |
| Parallax (π) | 56.65 ± 0.24 mas |
| Distance | 57.6 ± 0.2 ly (17.65 ± 0.07 pc) |
| Absolute magnitude (MV) | 3.63 |
| Details | |
| Mass | 1.26 M☉ |
| Radius | 1.3 R☉ |
| Luminosity | 3.02 L☉ |
| Surface gravity (log g) | 4.28 cgs |
| Temperature | 6,447 K |
| Metallicity [Fe/H] | −0.16 dex |
| Rotational velocity (v sin i) | 11.8±0.6 km/s |
| Age | 2.652 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
This is an ordinary F-type main-sequence star with a stellar classification of F5V. It is 2.7 billion years old with a projected rotational velocity of 12 km/s. The star has an estimated 1.26 times the mass of the Sun and 1.3 times the Sun's radius. It is radiating three times the luminosity of the Sun from its photosphere at an effective temperature of 6,447 K.
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