HD 88133

HD 88133
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Leo
Right ascension 10h 10m 07.676s[1]
Declination +18° 11′ 12.73″[1]
Apparent magnitude (V) 8.01[2]
Characteristics
Spectral type G8V[3]
B−V color index 0.810±0.015[2]
Astrometry
Radial velocity (Rv)−3.62±0.14[4] km/s
Proper motion (μ) RA: −11.135 mas/yr[1]
Dec.: −264.912 mas/yr[1]
Parallax (π)13.5882 ± 0.0249 mas[1]
Distance240.0 ± 0.4 ly
(73.6 ± 0.1 pc)
Absolute magnitude (MV)3.50[5]
Details
Mass1.23±0.16[6] M☉
Radius2.01±0.04[6] R☉
Luminosity3.14±0.02[4] L☉
Surface gravity (log g)3.82[5] cgs
Temperature5,414±97[4] K
Metallicity [Fe/H]0.26[5] dex
Rotational velocity (v sin i)4.9[5] km/s
Age5.08[5] Gyr
Other designations
BD+18 2326, HD 88133, HIP 49813, SAO 98978, LTT 12725, NLTT 23562, TYC 1422-1130-1, 2MASS J10100767+1811132[7]
Database references
SIMBADdata

HD 88133 is a yellow star with an orbiting exoplanet in the equatorial constellation of Leo. It has an apparent visual magnitude of 8.01,[2] which is too faint to be visible to the naked eye. With a small telescope it should be easily visible. The distance to this system, as measured through parallax, is 240 light years, but it is slowly drifting closer with a radial velocity of −3.6 km/s.[4]

This is classified as an ordinary G-type main-sequence star with a stellar classification of G8V.[3] However, D. A. Fischer and associates in 2005 listed a class of G5 IV, suggesting it is instead a subgiant star that is evolving away from the main sequence having exhausted the hydrogen at its core.[8] It is about 5 billion years old and is spinning with a projected rotational velocity of 4.9 km/s.[5] The star has 23% more mass than the Sun and has double the Sun's girth.[6] It is radiating over three times the luminosity of the Sun from its photosphere at an effective temperature of 5,414 km/s.[4]

  1. ^ a b c d Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference Anderson_Francis_2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Grieves_et_al_2018 was invoked but never defined (see the help page).
  4. ^ a b c d e Cite error: The named reference Gaia DR2 was invoked but never defined (see the help page).
  5. ^ a b c d e f Cite error: The named reference Earle2017 was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference Stassun_et_al_2017 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. ^ Cite error: The named reference Fischer2005 was invoked but never defined (see the help page).