HR 5256

HR 5256
Observation data
Epoch J2000      Equinox J2000
Constellation Ursa Major
Right ascension 13h 57m 32.0592s[1]
Declination +61° 29′ 34.2994″[1]
Apparent magnitude (V) 6.52[2][3]
Characteristics
Spectral type K3 V[4]
U−B color index 0.98[5]
B−V color index 1.01[5]
Astrometry
Radial velocity (Rv)−26.376±0.0011[1] km/s
Proper motion (μ) RA: −32.074±0.063[1] mas/yr
Dec.: 216.317±0.049[1] mas/yr
Parallax (π)99.2285 ± 0.0232 mas[1]
Distance32.869 ± 0.008 ly
(10.078 ± 0.002 pc)
Absolute magnitude (MV)6.51[3]
Details[3]
Mass0.82 M☉
Radius0.78[6] R☉
Luminosity0.28 L☉
Surface gravity (log g)4.57 cgs
Temperature4,811 K
Metallicity [Fe/H]0.17[7] dex
Rotational velocity (v sin i)4.6 km/s
Age5.36 Gyr
Other designations
BD+62°1325, HD 122064, HIP 68184, HR 5356, SAO 16230, G 239-008, LTT 14084[8]
Database references
SIMBADdata

HR 5256 is a star located thirty-three[1] light-years away from the Sun in the northern circumpolar constellation of Ursa Major. It has an orange hue and is a challenge to view with the naked eye, having an apparent visual magnitude of 6.52[2] The distance to this star is very nearly 10 parsecs, so the absolute magnitude of 6.51[3] is nearly the same as the star's apparent magnitude. HR 5256 is drifting nearer to the Sun with a radial velocity of −26.4 km/s,[1] and will make its closest approach to the Sun in about 333,000±16,000 years, when it will be at a distance of 12.72 ± 0.65 light-years.[9]

This object is an ordinary K-type main-sequence star with a stellar classification of K3 V,[4] which indicates it is undergoing core hydrogen fusion. It is over five billion years of age and is spinning slowly with a projected rotational velocity of 4.6 km/s.[3] The star has an estimated 82%[3] of the Sun's mass and 78% of the Sun's radius.[6] It is radiating just 28% of the luminosity of the Sun from its photosphere at an effective temperature of 4,811 K.[3]

  1. ^ a b c d e f g h Cite error: The named reference Gaia DR2 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference aaass89_2_415 was invoked but never defined (see the help page).
  3. ^ a b c d e f g Cite error: The named reference Earle2017 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference aaa406_995 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference ARICNS was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference apjss168_2_297 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference aaa480_1_91 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 BailerJones2018 was invoked but never defined (see the help page).