26 Aurigae
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Auriga |
| Right ascension | Template:RA[1] |
| Declination | Template:DEC[1] |
| Apparent magnitude (V) | 5.406[2] (6.29 / 6.21)[3] |
| Characteristics | |
| Spectral type | G8III + A1IV or B9.5V[4] |
| U−B Template:Engvar | +0.25[5] |
| B−V Template:Engvar | +0.45[5] |
| Variable type | suspected[6] |
| Astrometry | |
| Proper motion (μ) | RA: -21.32[1] mas/yr Dec.: -10.10[1] mas/yr |
| Distance | 163[4] pc |
| Absolute magnitude (MV) | Template:Val[7] |
| Orbit[4] | |
| Primary | 26 Aur A |
| Companion | 26 Aur B |
| Period (P) | Template:Val yr |
| Semi-major axis (a) | Template:Val" (Template:Val) |
| Eccentricity (e) | Template:Val |
| Inclination (i) | Template:Val° |
| Longitude of the node (Ω) | Template:Val° |
| Periastron epoch (T) | Template:Val |
| Argument of periastron (ω) (secondary) | Template:Val° |
| Details | |
| 26 Aur A | |
| Mass | 2.1 ± 1.0[4] Template:Solar mass |
| 26 Aur B | |
| Mass | 3.0 ± 0.4[4] Template:Solar mass |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist | |
| Database references | |
| SIMBAD | data |
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26 Aurigae is a binary star[3] system in the northern constellation of Auriga. It is visible to the naked eye as a faint star with an apparent visual magnitude of 5.41.[2]
The distance to this system remains poorly constrained. The new Hipparcos reduction gives a parallax of Template:Val.[1] The original Hipparcos parallax was given as Template:Val,[8] leading to a distance of Template:Val being assumed in many texts. A distance of Template:Val has been derived from fitting the spectrum.[4]
26 Aurigae is a visual binary system, and the two stars orbit each other every 52.735 years with an ellipticity of 0.653 and an angular separation Template:Val.[4] The system is made of a magnitude 6.29[3] G-type red giant, and a hotter magnitude 6.21[3] star that has been classified as an early B-type main-sequence star to an A-type subgiant star.[4] Component A is the cool giant star, the brighter but less massive of the pair.[9][4] The hotter star is sometimes listed as the primary on the basis of its stronger showing in the blended spectrum.[10]
References
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