HD 26755

HD 26755
Location of HD 26755 on the map (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Camelopardalis
Right ascension 04h 17m 08.09353s[1]
Declination +57° 51′ 37.1513″[1]
Apparent magnitude (V) 5.72±0.01[2]
Characteristics
Spectral type K1 III[3]
B−V color index +1.09[4]
Astrometry
Radial velocity (Rv)−38.2±1.6[5] km/s
Proper motion (μ) RA: +29.108 mas/yr[1]
Dec.: −25.942 mas/yr[1]
Parallax (π)12.0207 ± 0.1939 mas[1]
Distance271 ± 4 ly
(83 ± 1 pc)
Absolute magnitude (MV)+1.21[6]
Orbit[7]
PrimaryA
CompanionB
Period (P)1,658.7±2.9 d
Eccentricity (e)0.309±0.005
Periastron epoch (T)2,453,848±5 JD
Argument of periastron (ω)
(secondary)		31.2±1.2°
Semi-amplitude (K1)
(primary)		6.10±0.04 km/s
Details
Mass1.68[8] M☉
Radius9.44±0.47[9] R☉
Luminosity42.5±1.3[1] L☉
Surface gravity (log g)2.58±0.11[10] cgs
Temperature4,717±92[10] K
Metallicity [Fe/H]+0.17±0.05[10] dex
Rotational velocity (v sin i)1±1[11] km/s
Age2.13[8] Gyr
Other designations
AG+57°460, BD+57°787, GC 5139, HD 26755, HIP 19983, HR 1313, SAO 24514[12]
Database references
SIMBADdata

HD 26755, also known as HR 1313, is a spectroscopic binary[11][13] located in the northern circumpolar constellation Camelopardalis, the giraffe. It has an apparent magnitude of 5.72,[2] making it faintly visible to the naked eye under ideal conditions. Gaia DR3 parallax measurements place the system at a distance of 271 light years[1] and is currently drifitng closer with a heliocentric radial velocity of −38 km/s.[5] At its current distance, HD 26755's brightness is diminished by 0.19 magnitudes due to interstellar dust.[14]

The visible component is an evolved red giant with a stellar classification of K1 III.[3] It is estimated to be 2.13 billion years old,[8] enough time for the star to exhaust its core hydrogen and evolve to become a red giant. It has cooled and expanded to 9.4 times the Sun's radius. It has 1.68 times the mass of the Sun[8] and radiates 42.5 times the luminosity of the Sun[1] from its enlarged photosphere at an effective temperature of 4,717 K,[10] giving it an orange hue when viewed in the night sky. HD 26755 is a metal enriched star with an iron abundance 48% greater than the Sun.[10] It spins slowly with a projected rotational velocity of 1 km/s,[11] which is poorly constrained.

  1. ^ a b c d e f g 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 Appenzeller1967 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 Gontcharov2006 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. ^ Cite error: The named reference Griffin2012 was invoked but never defined (see the help page).
  8. ^ a b c d Cite error: The named reference Dotter2008 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Kervella2004 was invoked but never defined (see the help page).
  10. ^ a b c d e Cite error: The named reference Feuillet2016 was invoked but never defined (see the help page).
  11. ^ a b c Cite error: The named reference De Medeiros2002 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 Gontcharov2017 was invoked but never defined (see the help page).