HD 134060
HD 134060, also known by its Gould designation of 38 G. Circini, is a star in the southern constellation of Circinus. It is near the lower limit of stars visible to the naked eye, having an apparent visual magnitude of 6.29. The distance to HD 134060, as determined using an annual parallax shift measurement of 41.59 mas, is 78.4 light years. It is moving further away with a heliocentric radial velocity of 43.5 km/s, having come within 34.6 ly some 439,000 years ago.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Circinus |
| Right ascension | 15h 10m 44.74390s |
| Declination | –61° 25′ 20.3469″ |
| Apparent magnitude (V) | 6.29±0.01 |
| Characteristics | |
| Spectral type | G0 V Fe+0.4 or G3 IV |
| B−V color index | 0.623±0.003 |
| Astrometry | |
| Radial velocity (Rv) | 43.50±0.74 km/s |
| Proper motion (μ) | RA: −185.615 mas/yr Dec.: −12.184 mas/yr |
| Parallax (π) | 41.59 ± 0.23 mas |
| Distance | 78.4 ± 0.4 ly (24.0 ± 0.1 pc) |
| Absolute magnitude (MV) | 4.37 |
| Details | |
| Mass | 1.07±0.07 M☉ |
| Radius | 1.15±0.02 R☉ |
| Luminosity | 1.63 L☉ |
| Surface gravity (log g) | 4.35±0.04 cgs |
| Temperature | 5,965±50 K |
| Metallicity [Fe/H] | +0.14±0.01 dex |
| Rotation | 21.2±1.1 d |
| Rotational velocity (v sin i) | 3.21 km/s |
| Age | 1.75 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
During the NStars project, Grey et al. (2006) found a stellar classification of G0 V Fe+0.4 for this star, matching a Sun-like G-type main-sequence star with an overabundance of iron in its outer atmosphere. However, an older classification of G3 IV is still used, which would suggest it is instead a more evolved subgiant star. HD 134060 has an estimated 1.07 times the mass of the Sun and 1.15 times the Sun's radius. It is radiating 1.63 times the Sun's luminosity from its photosphere at an effective temperature of about 5,965 K.
The survey in 2015 have ruled out the existence of any additional stellar companions at projected distances from 22 to 163 astronomical units.