HD 148156

HD 148156
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Norma[1]
Right ascension 16h 28m 17.285s[2]
Declination –46° 19′ 03.46″[2]
Apparent magnitude (V) 7.69[1]
Characteristics
Spectral type G0/2V[3]
Apparent magnitude (B) 8.250[1]
Apparent magnitude (J) 6.688±0.018[1]
Apparent magnitude (H) 6.489±0.024[1]
Apparent magnitude (K) 6.397±0.023[1]
B−V color index 0.560±0.009[1]
Astrometry
Radial velocity (Rv)–1.806±0.0015[4] km/s
Proper motion (μ) RA: 45.530 mas/yr[2]
Dec.: 27.874 mas/yr[2]
Parallax (π)17.5072 ± 0.0194 mas[2]
Distance186.3 ± 0.2 ly
(57.12 ± 0.06 pc)
Absolute magnitude (MV)4.13[1]
Details
Mass1.22±0.01[5] M☉
Radius1.19±0.02 R☉[5]
1.302+0.083
−0.041[6] R☉
Luminosity1.84±0.03 L☉[5]
2.278±0.008[6] L☉
Surface gravity (log g)4.36±0.01[5] cgs
Temperature6,156±23[5] K
Metallicity [Fe/H]0.29±0.02[7] dex
Rotational velocity (v sin i)5.70±1.0[7] km/s
Age1.20±0.50[5] Gyr
Other designations
CD–46°10768, HD 148156, HIP 80680, SAO 226791, PPM 321761[8]
Database references
SIMBADdata
Exoplanet Archivedata

HD 148156 is a star with an orbiting exoplanet in the southern constellation of Norma. It is located at a distance of 186 light years away from the Sun,[2] but is drifting closer with a radial velocity of –1.8 km/s.[4] The star has an apparent visual magnitude of 7.69,[1] which is too dim to be visible to the naked eye. A survey in 2015 ruled out the existence of any stellar companions at projected distances from 49 to 345 astronomical units.[9]

The spectrum of this star presents as an ordinary G-type main-sequence star with a stellar classification of G0/2V,[3] although Naef and associates in 2010 listed a similar class of F8V.[7] A solar-type star,[7] it is estimated to be approximately 1.2[5] billion years old and is spinning with a projected rotational velocity of 6 km/s.[7] There is only a very low level of magnetic activity in the star's chromosphere.[7] Its metallicity, as measured by the abundance of iron, is almost twice solar.[7] The star has 1.2 times the mass and 1.2 to 1.3 times the radius of the Sun. It is radiating 1.84 to 2.28 times the luminosity of the Sun from its photosphere at an effective temperature of 6,156 K.[5]

  1. ^ a b c d e f g h i Cite error: The named reference Anderson_Francis_2012 was invoked but never defined (see the help page).
  2. ^ a b c d e Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Houk1978 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Soubiran_et_al_2018 was invoked but never defined (see the help page).
  5. ^ a b c d e f g h Cite error: The named reference Bonfanti_et_al_2016 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Johns_et_al_2018 was invoked but never defined (see the help page).
  7. ^ a b c d e f g Cite error: The named reference Naef2010 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Mugrauer_Ginski_2015 was invoked but never defined (see the help page).