}}{{Starbox reference
| Simbad = HD+134060
}}{{Starbox end}}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.[3] The distance to HD 134060, as determined using an annual parallax shift measurement of {{Val|41.59|ul=mas}},[1] is 78.4 light years. It is moving further away with a heliocentric radial velocity of 43.5 km/s, having come within {{Convert|10.62|pc|ly|abbr=on|disp=out}} some 439,000 years ago.[6]During the NStars project, Grey et al. (2006) found a stellar classification of {{nowrap|G0 V Fe+0.4}} for this star,[4] 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[3] 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.[3] It is radiating 1.63[6] times the Sun's luminosity from its photosphere at an effective temperature of about 5,965 K.[3]
Planetary system
Based upon an 8-year survey using the HARPS spectrograph at La Silla Observatory, in 2011 the detection of a pair of planets orbiting this star were announced. The inner planet, HD 134060 b, is in a tight, eccentric orbit around the star with a period of just over three days. The second object, HD 134060 c, has a more leisurely period of around {{Convert|1160.9|days|years|abbr=off|disp=out|sigfig=2}} and a high orbital eccentricity.[25]
The star was observed for a few hours by the Spitzer Space Telescope in the hopes of observing a transit by the inner planet, but none was detected.[3] HD 134060 displays an infrared excess at a wavelength of 18μm, making it a warm debris disk candidate.[27]
{{OrbitboxPlanet begin
| table_ref = [1]
}}{{OrbitboxPlanet
| exoplanet = b
| mass = {{Val|0.0351|0.0021}}
| period = {{Val|3.269555|0.000092|0.000080}}[14]
| semimajor = {{Val|0.0441|0.0010}}[14]
| eccentricity = {{Val|0.480|0.034}}[14]
}}{{OrbitboxPlanet
| exoplanet = c
| mass = {{Val|0.1507|0.071}}
| period = {{Val|1160.9|27.046|fmt=commas}}
| semimajor = {{Val|2.2263|0.0507}}
| eccentricity = {{Val|0.75|0.19}}
}}{{Orbitbox end}}References
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