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 |
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]