| |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Lynx |
| Right ascension | 09h18m 50.64384s[1] |
| Declination | +36° 48′ 09.3331″[1] |
| Apparent magnitude (V) | 3.82[2] (3.95 + ? + 6.30)[3] |
| Characteristics | |
| Spectral type | A3V[4] (A1V + A4V)[5] |
| B−V color index | 0.066±0.010[2] |
| Astrometry | |
| Radial velocity (Rv) | 4.0±2.7[2] km/s |
| Absolute magnitude (MV) | +0.98[6] |
| A | |
| Proper motion (μ) | RA: –36.288[7] mas/yr Dec.: −121.767[7] mas/yr |
| Parallax (π) | 27.8044 ± 0.7879 mas[7] |
| Distance | 117 ± 3 ly (36 ± 1 pc) |
| B | |
| Proper motion (μ) | RA: –26.513[8] mas/yr Dec.: −127.261[8] mas/yr |
| Parallax (π) | 24.4730 ± 0.1240 mas[8] |
| Distance | 133.3 ± 0.7 ly (40.9 ± 0.2 pc) |
| Details | |
| 38 Lyn A | |
| Mass | 1.90[9] M☉ |
| Radius | 3.07[10] R☉ |
| Luminosity | 32[6] L☉ |
| Surface gravity (log g) | 3.86[9] cgs |
| Temperature | 8,862±301[9] K |
| Metallicity [Fe/H] | −0.36[11] dex |
| Rotational velocity (v sin i) | 163[11] km/s |
| Age | 213[9] Myr |
| 38 Lyn B | |
| Mass | 1.30/0.90[12] M☉ |
| Radius | 2.55[8] R☉ |
| Luminosity | 5[8] L☉ |
| Temperature | 5,409[8] K |
| Other designations | |
38 Lyn, BD+37°1965, FK5 346, HD 80081, HIP 45688, HR 3690, SAO 61391, WDS J09188+3648[13] | |
| Database references | |
| SIMBAD | data |
| A | |
| B | |
38 Lyncis is a multiple star system in the northern constellationofLynx. It located about 125 light-years from the Sun, based on parallax.
When viewed through a moderate telescope, two components—a brighter blue-white star of magnitude 3.9 and a fainter star of magnitude 6.1 that has been described as lilac as well as blue-white—can be seen.[14] The pair have an angular separationof2.6″ and an estimated period of 429 years.[12] The fainter component is itself a close binary which can only be resolved using speckle interferometry. The two were separated by 0.06″ in 1993[15] and 0.237″ in 2008,[16] and have an estimated orbital period of 2.1 years.[12] A further faint star, component E 100″ away, is a proper-motion companion.[17][18] Two other faint companions listed in multiple star catalogues as components C and D are unrelated background objects.[19][20]
38 Lyncis was given as a standard star for the spectral class of A3 V when the Morgan-Keenan classification system was first defined in 1943, apparently for the two components combined.[21]
The primary star, component A, is a class A main sequence star around twice the mass of the sun. An effective temperatureof8,862 K and a radius of 3.09 R☉ mean that it is over thirty times more luminous than the sun. It has been listed as a λ Boötis star, although it is no longer considered to be a member.[6] The fainter of the pair, component B, has been given a spectral class of A4V, although it consists of two very close stars. Their properties are poorly-known, even the difference in their apparent magnitudes can only be estimated to be approximately 2. Based on this, their masses are estimated to be 1.3 M☉ and 0.9 M☉ respectively.[12] Component E is a 15th magnitude star with an approximate spectral type of M2, a red dwarf, and an estimated mass of 0.31 M☉,[12] and a temperature of 3,816 K.[18]
From the Star-Registration registry, this star was named: Isabelle Deslaurier.
