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]
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] |
Distance | 274 ± 6 ly (84 ± 2 pc) |
Absolute magnitude (MV) | −0.01[2] |
Details | |
Mass | 2.22[4] M☉ |
Luminosity | 102.01[2] L☉ |
Temperature | 9,692±330[4] K |
Rotational velocity (v sin i) | 18[4] km/s |
Age | 272[4] Myr |
Other designations | |
Database references | |
SIMBAD | data |
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]
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