20 Camelopardalis

20 Camelopardalis
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Camelopardalis
Right ascension 05h 37m 27.0446s[1]
Declination +56° 29′ 16.086″[1]
Apparent magnitude (V) 7.45±0.01[2]
Characteristics
Evolutionary stage horizontal branch[3]
Spectral type G8 II-III[4]
U−B color index +0.69[2]
B−V color index +0.98[2]
Astrometry
Radial velocity (Rv)−50.3±2.3[5] km/s
Proper motion (μ) RA: −0.534 mas/yr[1]
Dec.: −7.186 mas/yr[1]
Parallax (π)3.7078 ± 0.1769 mas[1]
Distance880 ± 40 ly
(270 ± 10 pc)
Absolute magnitude (MV)+1.39[6]
Details
Mass1.83[7] M☉
Radius12.54[8] R☉
Luminosity142[5] L☉
Surface gravity (log g)2.79[9] cgs
Temperature5,064[9] K
Metallicity [Fe/H]−0.03[9] dex
Other designations
20 Cam, AG+56°533, BD+56°1041, GC 6947, HD 36770, HIP 26426, SAO 25277
Database references
SIMBADdata

20 Camelopardalis (20 Cam) is a solitary star in the circumpolar constellation Camelopardalis. It has an apparent magnitude of 7.45, making it readily visible in binoculars but not to the naked eye. Located about 880 light years away, it is approaching the Solar System with a radial velocity of −50.3 km/s. Due to its faintness, 20 Cam is one of the 220 Flamsteed stars without Bright Star Catalog designations.[10]

20 Cam is a red clump[3] giant star with a spectral classification of G8 II-III.[4] It has a measured angular diameter of 0.44 mas,[11] with an actual radius of 13 R☉ at its estimated distance. It has 1.83 times the mass of the Sun and shines at 142 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 5,064 K, giving it a yellow glow. 20 Cam's metallicity – elements heavier than helium – is around solar level.[9]

  1. ^ a b c d Cite error: The named reference edr3 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference Oja1991 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Rybka2007 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Yoss1961 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference DR2 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 Anders2022 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference kervella2022 was invoked but never defined (see the help page).
  9. ^ a b c d Cite error: The named reference Ting2018 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Bidelman1990 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Bourges2014 was invoked but never defined (see the help page).