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HD 32518

HD 32518 / Mago
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Camelopardalis
Right ascension 05h 09m 36.720s[1]
Declination +69° 38′ 21.85″[1]
Apparent magnitude (V) 6.42±0.01[2]
Characteristics
Evolutionary stage Horizontal branch[3]
Spectral type K1 III[4]
U−B color index +1.03[5]
B−V color index +1.11[5]
Astrometry
Radial velocity (Rv)–7.02±0.35[6] km/s
Proper motion (μ) RA: +61.031 mas/yr[1]
Dec.: −62.382 mas/yr[1]
Parallax (π)8.2192 ± 0.0166 mas[1]
Distance396.8 ± 0.8 ly
(121.7 ± 0.2 pc)
Absolute magnitude (MV)+1.04[7]
Details
Mass1.2±0.1[8] M☉
Radius10.8±0.3[8] R☉
Luminosity46.4±0.9[8] L☉
Surface gravity (log g)2.48[3] cgs
Temperature4,731[3] K
Metallicity [Fe/H]+0.04[3] dex
Rotational velocity (v sin i)1.2±2[9] km/s
Age6.4±1.5[8] Gyr
Other designations
Mago, AG+69°241, BD+69°302, GC 6245, HD 32518, HIP 24003, HR 1636, SAO 13382[10]
Database references
SIMBADdata
Exoplanet Archivedata

HD 32518 is a star with an orbiting exoplanet in the northern circumpolar constellation Camelopardalis. It has an apparent magnitude of 6.42,[2] placing it near the limit of naked eye visibility. Located 397 light years away based on parallax measurements,[1] it is receding with a heliocentric radial velocity of −7.02 km/s.[6]

HD 32518 has a stellar classification of K1 III,[4] indicating that it is an orange giant star that has evolved away from the main sequence. Located in the cool end in the red clump, the object is currently on the horizontal branch.[3] This indicates it is generating energy by helium fusion at the core. It has 1.2 the mass of the Sun[8] but has expanded to a radius of 10.8 R☉.[8] It shines at 46.4 times the luminosity of the Sun[8] from its enlarged photosphere at an effective temperature of 4,731 K,[3] giving it a yellowish orange glow. HD 32518 is older than the Sun with an age of 6.4 billion years[8] and spins slowly with a projected rotational velocity of 1.2 km/s−1.[9] However, this amount is poorly constrained. As for its metallicity, studies place it around solar level.[3]

  1. ^ a b c d e Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference Oja1991 was invoked but never defined (see the help page).
  3. ^ a b c d e f g Cite error: The named reference Ting2018 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Halliday1955 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Oja1983 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Famaey2005 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  8. ^ a b c d e f g h Cite error: The named reference Bonfanti2015 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference deMed1999 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
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