HD 45184

HD 45184
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Canis Major
Right ascension 06h 24m 43.87975s[1]
Declination –28° 46′ 48.4163″[1]
Apparent magnitude (V) 6.37[2]
Characteristics
Evolutionary stage main sequence
Spectral type G2Va[3]
Apparent magnitude (B) 6.996[2]
Apparent magnitude (J) 5.219[4]
Apparent magnitude (H) 4.962[4]
Apparent magnitude (K) 4.871[4]
B−V color index 0.626±0.007[2]
Astrometry
Radial velocity (Rv)−3.828±0.0003[1] km/s
Proper motion (μ) RA: −165.257[1] mas/yr
Dec.: −121.826[1] mas/yr
Parallax (π)45.5224 ± 0.0320 mas[1]
Distance71.65 ± 0.05 ly
(21.97 ± 0.02 pc)
Absolute magnitude (MV)4.67[2][5]
Details
Mass1.08±0.04[6] M☉
Radius1.05±0.02[1] R☉
Luminosity1.178+0.002
−0.001[1] L☉
Surface gravity (log g)4.47±0.02[7] cgs
Temperature5,862+72
−48[1] K
Metallicity [Fe/H]0.070±0.016[6] dex
Rotation20.0±0.1 d[6]
Rotational velocity (v sin i)2.1[7] km/s
Age3.0+0.7
−1.4[6] Gyr
Other designations
CD–29°2981, GJ 3394, HD 45184, HIP 30503, HR 2318, SAO 171711, PPM 250356[8]
Database references
SIMBADdata
Exoplanet Archivedata

HD 45184 is a star in the southern constellation of Canis Major. It is a yellow-hued star near the lower limit of visibility to the naked eye with an apparent visual magnitude of 6.37.[2] The star is located at a distance of 71.65 light years from the Sun based on parallax.[1] It is drifting closer with a radial velocity of −3.8 km/s.[1]

This object is an ordinary G-type main-sequence star with a stellar classification of G2Va,[3] and it is considered a solar twin.[5] The mass, size, and luminosity of the star are slightly higher than for the Sun, and it has a near solar metallicity – what astronomers term the abundance of elements with higher atomic numbers than helium. The star is around three billion years old and is spinning with a 20-day period.[6] It has a 5.14[9]-year magnetic activity cycle that has a lower amplitude than on the Sun.[7]

  1. ^ a b c d e f g h i j k Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d e Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Keenan1989 was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference 2MASS was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Datson2014 was invoked but never defined (see the help page).
  6. ^ a b c d e Cite error: The named reference Oliveira2019 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference Udry2019 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 Flores2016 was invoked but never defined (see the help page).