60 Herculis
White-hued star in the constellation Hercules
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60 Herculis is a single[12] star located 134[1] light years away from the Sun in the northern constellation of Hercules,[11] and is positioned just seven[13] degrees away from Rasalgethi (Alpha Herculis). It is visible to the naked eye as a faint, white-hued star with an apparent visual magnitude of 4.871.[2] This star is moving closer to the Earth with a heliocentric radial velocity of −4 km/s.[8]
 | |
| Observation data Epoch J2000 Equinox ICRS | |
|---|---|
| Constellation | Hercules |
| Right ascension | 17h 05m 22.69066s[1] |
| Declination | +12° 44′ 26.9816″[1] |
| Apparent magnitude (V) | 4.871[2] |
| Characteristics | |
| Evolutionary stage | main sequence[3] |
| Spectral type | A3V[4] or A4IV[5] |
| U−B color index | +0.12[6] |
| B−V color index | +0.125±0.006[7] |
| Astrometry | |
| Radial velocity (Rv) | −4.2±2[8] km/s |
| Proper motion (μ) | RA: +49.805[1] mas/yr Dec.: −12.030[1] mas/yr |
| Parallax (π) | 24.3967±0.2232 mas[1] |
| Distance | 134 ± 1 ly (41.0 ± 0.4 pc) |
| Absolute magnitude (MV) | 1.83[7] |
| Details | |
| Mass | 2.04±0.31[9] M☉ |
| Radius | 1.89[9] R☉ |
| Luminosity | 15.2[9] L☉ |
| Surface gravity (log g) | 4.20[9] cgs |
| Temperature | 8,299[9] K |
| Rotational velocity (v sin i) | 117[3] km/s |
| Age | 327[10] Myr |
| Other designations | |
| 60 Her, BD+12°3142, FK5 635, HD 154494, HIP 83613, HR 6355, SAO 102584[11] | |
| Database references | |
| SIMBAD | data |
Abt and Morrell (1995) assigned this star a stellar classification of A3V,[4] matching an ordinary A-type main-sequence star. However, earlier studies gave it a luminosity class of IV,[5] which suggested it is a subdwarf star. It has a projected rotational velocity of 117 km/s,[3] which is creating an equatorial bulge that is 5% larger than the star's polar radius.[14] The star is 327 million years old[10] with 2.0 times the Sun's mass.[9] It is radiating 15 times the luminosity of the Sun from its photosphere at an effective temperature of 8,299 K.[9]