HD 148156

HD 148156 is an 8th magnitude G-type main sequence star located approximately 168 light years away in the constellation Norma. This star is larger, hotter, brighter, and more massive than our Sun. Also its metal content almost twice as much as the Sun.

HD 148156
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Norma
Right ascension 16h 28m 17.284s[1]
Declination –46° 19 03.46[1]
Apparent magnitude (V) 7.71
Characteristics
Spectral type G1V
Apparent magnitude (B) 8.22
Apparent magnitude (J) 6.688
Apparent magnitude (H) 6.489
Apparent magnitude (K) 6.397
B−V color index 0.51
Astrometry
Radial velocity (Rv)–2.0 km/s
Proper motion (μ) RA: 44.88±0.94[1] mas/yr
Dec.: 28.10±0.74[1] mas/yr
Parallax (π)19.38 ± 0.75[1] mas
Distance168 ± 7 ly
(52 ± 2 pc)
Absolute magnitude (MV)4.09
Details
Mass1.15 M
Radius1.28±0.12 R
Luminosity1.902±0.235 L
Surface gravity (log g)4.31 cgs
Temperature6010±100 K
Metallicity0.29
Other designations
CD–46°10768, HIP 80680, PPM 321761, SAO 226791
Database references
SIMBADdata
Exoplanet Archivedata
Extrasolar Planets
Encyclopaedia
data

The survey in 2015 have ruled out the existence of any additional stellar companions at projected distances from 49 to 345 astronomical units.[2]

Planetary system

In 2009, a gas giant planet was found in orbit around the star.[3]

The HD 148156 planetary system[3]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b 0.85+0.67
−0.05
 MJ
2.45+0.04
−0.05
1027±28 0.52+0.04
−0.09

See also

  • List of extrasolar planets

References

  1. van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID 18759600. Vizier catalog entry
  2. 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. Retrieved 19 June 2020.
  3. Naef, D.; et al. (2010). "The HARPS search for southern extrasolar planets XXIII. 8 planetary companions to low-activity solar-type stars". Astronomy and Astrophysics. 523. A15. arXiv:1008.4600. Bibcode:2010A&A...523A..15N. doi:10.1051/0004-6361/200913616. S2CID 118845989.


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