32 Ophiuchi[6] is a single[7] star located 410[1] light years away from the Sun in the constellation Hercules. It is visible to the naked eye as a dim, red-hued star with an apparent visual magnitude of 4.97.[2] This is an aging red giant star on the asymptotic giant branch[8] with a stellar classification of M3−III.[3] Having exhausted the supply of hydrogen at its core it has expanded to 60[1] times the girth of the Sun. The star is radiating 614[1] times the luminosity of the Sun from its swollen photosphere at an effective temperature of around 3,712 K.[1] It is moving further away from the Sun with a heliocentric radial velocity of +43 km/s.[2]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Hercules |
Right ascension | 17h 03m 07.87177s[1] |
Declination | +14° 05′ 31.0117″[1] |
Apparent magnitude (V) | 4.97[2] |
Characteristics | |
Spectral type | M3−III[3] |
B−V color index | 1.600±0.007[2] |
Astrometry | |
Radial velocity (Rv) | +43.15±0.15[2] km/s |
Proper motion (μ) | RA: +24.628[1] mas/yr Dec.: −62.492[1] mas/yr |
Parallax (π) | 7.9057 ± 0.2050 mas[1] |
Distance | 410 ± 10 ly (126 ± 3 pc) |
Absolute magnitude (MV) | −0.44[2] |
Details | |
Mass | 1.60+1.38 −0.75[4] M☉ |
Radius | 59.92+4.78 −13.93[1] R☉ |
Luminosity | 614.4±18.2[1] L☉ |
Temperature | 3,712+525 −140[1] K |
Metallicity [Fe/H] | 0.00[4] dex |
Other designations | |
Database references | |
SIMBAD | data |