HD 134060

HD 134060
Observation data
Epoch J2000      Equinox J2000
Constellation Circinus
Right ascension 15h 10m 44.74390s[1]
Declination –61° 25′ 20.3469″[1]
Apparent magnitude (V) 6.29±0.01[2]
Characteristics
Spectral type G0 V Fe+0.4[3] or G3 IV[2]
B−V color index 0.623±0.003[4]
Astrometry
Radial velocity (Rv)43.50±0.74[4] km/s
Proper motion (μ) RA: −185.615[1] mas/yr
Dec.: −12.184[1] mas/yr
Parallax (π)41.59 ± 0.23 mas[1]
Distance78.4 ± 0.4 ly
(24.0 ± 0.1 pc)
Absolute magnitude (MV)4.37[4]
Details[2]
Mass1.07±0.07 M☉
Radius1.15±0.02 R☉
Luminosity1.63[4] L☉
Surface gravity (log g)4.35±0.04 cgs
Temperature5,965±50 K
Metallicity [Fe/H]+0.14±0.01 dex
Rotation21.2±1.1 d[5]
Rotational velocity (v sin i)3.21[6] km/s
Age1.75[6] Gyr
Other designations
38 G. Circini, CD−60° 5490, HD 134060, HIP 74273, SAO 253043, LTT 6035[7]
Database references
SIMBADdata

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.[2] The distance to HD 134060, as determined using an annual parallax shift measurement of 41.59 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 34.6 ly some 439,000 years ago.[4]

During the NStars project, Grey et al. (2006) found a stellar classification of G0 V Fe+0.4 for this star,[3] 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[2] 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.[2] It is radiating 1.63[4] times the Sun's luminosity from its photosphere at an effective temperature of about 5,965 K.[2]

The survey in 2015 have ruled out the existence of any additional stellar companions at projected distances from 22 to 163 astronomical units.[8]

  1. ^ a b c d e f Cite error: The named reference dr1 was invoked but never defined (see the help page).
  2. ^ a b c d e f g Cite error: The named reference Gillon2017 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Gray2006 was invoked but never defined (see the help page).
  4. ^ a b c d e f Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  5. ^ Suárez Mascareño, A.; Rebolo, R.; González Hernández, J. I.; Esposito, M. (2015), "Rotation periods of late-type dwarf stars from time series high-resolution spectroscopy of chromospheric indicators", Monthly Notices of the Royal Astronomical Society, 452 (3): 2745–2756, arXiv:1506.08039, Bibcode:2015MNRAS.452.2745S, doi:10.1093/mnras/stv1441
  6. ^ a b Cite error: The named reference Delgado_Mena2015 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  8. ^ Mugrauer, M.; Ginski, C. (12 May 2015). "High-contrast imaging search for stellar and substellar companions of exoplanet host stars". Monthly Notices of the Royal Astronomical Society. 450 (3): 3127–3136. doi:10.1093/mnras/stv771. hdl:1887/49340. Retrieved 19 June 2020.