12 Lyncis

12 Lyncis, abbreviated 12 Lyn, is a triple star^[8] system in the constellation Lynx. It is visible to the naked eye as a faint point of light with a combined apparent visual magnitude of 4.87. When seen through a telescope, it can be separated into three stars: two components with magnitudes 5.4 and 6.0 that lie at an angular separation by 1.8″ (as of 1992) and a yellow-hued star of magnitude 7.2 at a separation of 8.6″ (as of 1990).^[9][10] The orbit of the two brighter stars is not known with certainty, but appears to have a period of somewhere around 700 to 900 years.^[11] The pair have a projected separation of 128 AU.^[4] Parallax indicates the system is 210±10 light years distant from Earth.^[1]

12 Lyn

Observation data Epoch J2000      Equinox J2000
Constellation	Lynx
Right ascension	06h 46m 14.13019s[1]
Declination	+59° 26′ 30.0227″[1]
Apparent magnitude (V)	4.86[2] (5.44 / 6.00)[3]
Characteristics
Spectral type	A3V[2] (A1.5V + A2V)[4]
U−B color index	+0.08[5]
B−V color index	+0.084±0.012[2]
Astrometry
Radial velocity (Rv)	−3.0±4.2[6] km/s
Proper motion (μ)	RA: −19.63[1] mas/yr Dec.: −7.23[1] mas/yr
Parallax (π)	15.19±0.78 mas[1]
Distance	210 ± 10 ly (66 ± 3 pc)
Absolute magnitude (MV)	0.77[2]
Orbit[3]
Period (P)	907.6 yr
Semi-major axis (a)	2.30″
Eccentricity (e)	0.3700
Inclination (i)	134.7°
Longitude of the node (Ω)	166.5°
Periastron epoch (T)	B 2677.4
Argument of periastron (ω) (secondary)	322.6°
Details
12 Lyn A
Radius	2.52[4] R☉
Rotational velocity (v sin i)	90±30[4] km/s
12 Lyn B
Radius	2.44[4] R☉
Rotational velocity (v sin i)	100±30[4] km/s
Other designations
12 Lyn, BD+59°1015, GC 9850, HD 48250, HIP 32438, HR 2470, SAO 25939, WDS 06462+5927[7]
Database references
SIMBAD	12 Lyn
	12 Lyn A
	12 Lyn B