HD 4308

HD 4308
Observation data
Epoch J2000      Equinox J2000
Constellation Tucana
Right ascension 00h 44m 39.2675s[1]
Declination –65° 38′ 58.2825″[1]
Apparent magnitude (V) 6.544±0.005[2]
Characteristics
Evolutionary stage main sequence
Spectral type G6VFe-0.9[3]
Apparent magnitude (B) 7.193[4]
Apparent magnitude (V) 6.552[4]
Apparent magnitude (J) 5.366±0.024[5]
Apparent magnitude (H) 5.101±0.016[5]
Apparent magnitude (K) 4.945±0.020[5]
Astrometry
Radial velocity (Rv)+95.251±0.0162[6] km/s
Proper motion (μ) RA: 157.504±0.041[1] mas/yr
Dec.: −741.599±0.040[1] mas/yr
Parallax (π)45.3930 ± 0.0220 mas[1]
Distance71.85 ± 0.03 ly
(22.03 ± 0.01 pc)
Details[7]
Mass0.95±0.05 M☉
Radius1.04±0.03 R☉
Luminosity1.03±0.01 L☉
Surface gravity (log g)4.38±0.02 cgs
Temperature5,714±61 K
Metallicity [Fe/H]−0.35±0.07[2] dex
Rotational velocity (v sin i)1.0±1.0[2] km/s
Age1.6±4.0[7] or 10.0+0.5
−1.0[8] Gyr
Other designations
BD−27°223, GC 897, GJ 9028, HD 4308, HIP 3497, SAO 248244, PPM 352003, LFT 71, LHS 1139, LPM 40, LTT 416, TYC 8847-598-1, GCRV 50662, 2MASS J00443925-6538581[9]
Database references
SIMBADdata
ARICNSdata

HD 4308 is a single[2] star with an orbiting exoplanet in the southern constellation of Tucana.[9] It has a yellow hue and is a challenge to view with the naked eye even under good seeing conditions, having an apparent visual magnitude of 6.54.[2] This object is located at a distance of 72 light years, as determined from parallax measurements. It is a population II star[2] and is considered to be a member of the thick disk.[10] The star is receding from the Sun with a radial velocity of +95 km/s.[6]

This is a Sun-like G-type main-sequence star with a stellar classification of G6VFe-0.9,[3] where the suffix notation indicates an underabundance of iron in the spectrum. The age of the star is poorly constrained, with estimated ranging from 1.6[7] billion years up to 10 billion.[8] It has 95% of the mass of the Sun but 104% of the Sun's radius. The star is radiating nearly the same luminosity as the Sun from its photosphere at an effective temperature of 5,714 K.[7]

  1. ^ a b c d e Cite error: The named reference Gaia DR2 was invoked but never defined (see the help page).
  2. ^ a b c d e f Cite error: The named reference Fuhrmann2017 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 Cite error: The named reference Koen2010 was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference 2MASS was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Soubiran2013 was invoked but never defined (see the help page).
  7. ^ a b c d Cite error: The named reference Bonfanti2015 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Ge2016 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Neves2009 was invoked but never defined (see the help page).