21 Lyncis

21 Lyncis

21 Lyncis (center) in optical light
Observation data
Epoch J2000      Equinox J2000
Constellation Lynx
Right ascension 07h 26m 42.85187s[1]
Declination +49° 12′ 41.4907″[1]
Apparent magnitude (V) 4.61[2]
Characteristics
Evolutionary stage main sequence
Spectral type A0.5Vs[3]
B−V color index −0.001±0.002[2]
Astrometry
Radial velocity (Rv)+26.8±0.1[2] km/s
Proper motion (μ) RA: −10.22[1] mas/yr
Dec.: −49.29[1] mas/yr
Parallax (π)11.92 ± 0.24 mas[1]
Distance274 ± 6 ly
(84 ± 2 pc)
Absolute magnitude (MV)−0.01[2]
Details
Mass2.22[4] M☉
Luminosity102.01[2] L☉
Temperature9,692±330[4] K
Rotational velocity (v sin i)18[4] km/s
Age272[4] Myr
Other designations
21 Lyn, BD+49° 1623, FK5 2572, HD 58142, HIP 36145, HR 2818, SAO 41764[5]
Database references
SIMBADdata

21 Lyncis is a single[6] star in the northern constellation of Lynx. It is visible to the naked eye as a faint, white-hued star with an apparent visual magnitude of 4.61.[2] The star is located at a distance of about 274 light years away from the Sun, based on parallax.[1] It is moving further away from the Earth with a heliocentric radial velocity of around +27 km/s.[2]

This object is an ordinary A-type main-sequence star with a stellar classification of A0.5Vs,[3] where the 's' suffix indicates "sharp" lines in the spectrum, usually due to slow rotation. It is about 272[4] million years old with a projected rotational velocity of 18 km/s.[4] The star has 2.22[4] times the mass of the Sun and is radiating 102[2] times the luminosity of the Sun from its photosphere at an effective temperature of 9,692 K.[4]

  1. ^ a b c d e f Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c d e f g h Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference abt1995 was invoked but never defined (see the help page).
  4. ^ a b c d e f g h Cite error: The named reference David2015 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).