21 Lyncis is a single 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. The star is located at a distance of about 274 light years away from the Sun, based on parallax. It is moving further away from the Earth with a heliocentric radial velocity of around 27 km/s.
This object is an ordinary A-type main-sequence star with a stellar classification of A0.5Vs, where the 's' suffix indicates "sharp" lines in the spectrum, usually due to slow rotation. It is about 272 million years old with a projected rotational velocity of 18 km/s. The star has 2.22 times the mass of the Sun and is radiating 102 times the luminosity of the Sun from its photosphere at an effective temperature of 9,692 K.
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