HD 58425

HD 58425
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Camelopardalis
Right ascension 07h 30m 52.66467s[1]
Declination +68° 27′ 56.3270″[1]
Apparent magnitude (V) 5.64±0.01[2]
Characteristics
Evolutionary stage red giant branch[1]
Spectral type K2 III[3]
B−V color index +1.11[4]
Astrometry
Radial velocity (Rv)58.6±0.2[5] km/s
Proper motion (μ) RA: −2.031 mas/yr[1]
Dec.: −42.687 mas/yr[1]
Parallax (π)6.9858 ± 0.2644 mas[1]
Distance470 ± 20 ly
(143 ± 5 pc)
Absolute magnitude (MV)−0.05[6]
Details
Mass1.74±0.52[7] M☉
Radius24.7[8] R☉
Luminosity199+24
−22[9] L☉
Surface gravity (log g)2.4±0.1[10] cgs
Temperature4,479±62[8] K
Metallicity [Fe/H]−0.42±0.04[10] dex
Age3.55+0.52
−0.46[7] Gyr
Other designations
54 H. Ursae Majoris,[11] AG+68°343, BD+68°480, FK5 284, GC 9985, HD 58425, HIP 36528, HR 2830, SAO 14211[12]
Database references
SIMBADdata

HD 58425, also known as HR 2830, is an astrometric binary[13] (100% chance[14]) located in the northern circumpolar constellation Camelopardalis. It is faintly visible to the naked eye as an orang point of light at an apparent magnitude of 5.64.[2] Based on parallax measurements from Gaia DR3, the system is estimated to be 470 light years away from Earth.[1] It appears to be rapidly receding from the Sun, having a heliocentric radial velocity of 58.6 km/s.[5] HD 58425 is listed as 54 Ursae Majoris in Johann Hevelius' catalogue,[11] but this was dropped after the official IAU's official constellation borders were drawn.

The visible component is an evolved, RGB star with a stellar classification of K2 III.[3] It has 1.74 times the mass of the Sun and is said to be 3.55 billion years old.[7] At this age, the object has expanded to 24.7 times the radius of the Sun[8] and now radiates nearly 200 times the luminosity of the Sun[9] from its enlarged photosphere at an effective temperature of 4,479 K.[8] HD 58425 A has an iron abundance only 38% that of the Sun's,[10] making it metal deficient.

  1. ^ a b c d e f Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference Tycho2000 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Adams1935 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Haggkvist1970 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Famaey2005 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference Feuillet2016 was invoked but never defined (see the help page).
  8. ^ a b c d Cite error: The named reference Stassun2019 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Charbonnel2020 was invoked but never defined (see the help page).
  10. ^ a b c Cite error: The named reference Sprague2022 was invoked but never defined (see the help page).
  11. ^ a b Cite error: The named reference Verbunt2010 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference Frankowski2006 was invoked but never defined (see the help page).