26 Boötis
Star in the constellation Boötes
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26 Boötis is a single[7] star in the northern constellation of Boötes,[6] located 188 light years away from the Sun.[1] It is visible to the naked eye as a dim, yellow-white hued star with an apparent visual magnitude of 5.91.[2] This object is moving closer to the Earth with a heliocentric radial velocity of −16.5 km/s.[2]
| Observation data Epoch J2000 Equinox ICRS | |
|---|---|
| Constellation | Boötes |
| Right ascension | 14h 32m 32.5423s[1] |
| Declination | +22° 15′ 36.2044″[1] |
| Apparent magnitude (V) | 5.91[2] |
| Characteristics | |
| Spectral type | F2 IV[3] |
| B−V color index | 0.391±0.005[2] |
| Astrometry | |
| Radial velocity (Rv) | −16.5±1.8[2] km/s |
| Proper motion (μ) | RA: −127.019[1] mas/yr Dec.: +39.662[1] mas/yr |
| Parallax (π) | 17.3311±0.0774 mas[1] |
| Distance | 188.2 ± 0.8 ly (57.7 ± 0.3 pc) |
| Absolute magnitude (MV) | 2.20[4] |
| Details | |
| Mass | 1.46[5] M☉ |
| Radius | 2.43+0.03 −0.06[1] R☉ |
| Luminosity | 11.553±0.065[1] L☉ |
| Surface gravity (log g) | 3.93[5] cgs |
| Temperature | 6,826+40.5 −88.5[1] K |
| Metallicity [Fe/H] | 0.08[3] dex |
| Rotational velocity (v sin i) | 55.8±2.8[4] km/s |
| Age | 1.557[5] Gyr |
| Other designations | |
| 26 Boo, BD+22°2715, FK5 3151, GC 19611, HD 127739, HIP 71115, HR 5434, SAO 83395[6] | |
| Database references | |
| SIMBAD | data |
This is an F-type subgiant star with a stellar classification of F2 IV,[3] which suggests it has exhausted the supply of hydrogen at its core and is in the process of evolving into a giant. It is an estimated 1.6[5] billion years old with 1.46[5] times the mass of the Sun and 2.43[1] times the Sun's radius. The star is radiating 11.6[1] times the Sun's luminosity from its photosphere at an effective temperature of 6,826 K.[1] The rotation rate is moderately high, with a projected rotational velocity of 56 km/s.[4] 26 Boötis is a known source of radio emission.[8]