26 Aurigae
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Auriga |
Right ascension | 05h 38m 38.08510s[1] |
Declination | +30° 29′ 32.7054″[1] |
Apparent magnitude (V) | 5.406[2] (6.00 / 6.33)[3] |
Characteristics | |
Spectral type | G8III + A1IV or B9.5V[3] |
U−B color index | +0.25[4] |
B−V color index | +0.45[4] |
Astrometry | |
Proper motion (μ) | RA: -21.32[1] mas/yr Dec.: -10.10[1] mas/yr |
Absolute magnitude (MV) | 5.815 |
Orbit[3] | |
Primary | 26 Aur A |
Companion | 26 Aur B |
Period (P) | 52.735 ± 0.156 yr |
Semi-major axis (a) | 0.154 ± 0.001″ |
Eccentricity (e) | 0.653 ± 0.002 |
Inclination (i) | 124.22 ± 0.29° |
Longitude of the node (Ω) | 127.08 ± 0.38° |
Periastron epoch (T) | 1974.927 ± 0.026 |
Argument of periastron (ω) (secondary) | 309.07 ± 0.14° |
Details | |
26 Aur A | |
Mass | 2.1 ± 1.0[3] M☉ |
26 Aur B | |
Mass | 3.0 ± 0.4[3] M☉ |
Other designations | |
Database references | |
SIMBAD | data |
26 Aurigae is a binary star in the constellation Auriga. Its apparent magnitude is 5.41.[2]
26 Aurigae is a visual binary. The two stars orbit each other every 52.735 years, separated 0.154″.[3] The system is made of a G-type red giant, and another star that has been classified as an early B-type main-sequence star to an A-type subgiant star.[3] The red giant star is brighter, although sometimes the hotter star is considered to be the primary star,[5] as it is more massive.[3]
References
- 1 2 3 4 van Leeuwen, F.; et al. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. Bibcode:2007A&A...474..653V. arXiv:0708.1752 . doi:10.1051/0004-6361:20078357.
- 1 2 Høg, E.; et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H.
- 1 2 3 4 5 6 7 8 Rica Romero, F. M. (2008). "Orbital Elements for BU 1240 AB. Nature of the C and D Components". Revista Mexicana de Astronomía y Astrofísica. 44: 137–147. Bibcode:2008RMxAA..44..137R.
- 1 2 Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Bibcode:1986EgUBV........0M.
- ↑ Abt, Helmut A. (2008). "Visual Multiples. IX. MK Spectral Types". The Astrophysical Journal Supplement Series. 176: 216–217. Bibcode:2008ApJS..176..216A. doi:10.1086/525529.
This article is issued from
Wikipedia.
The text is licensed under Creative Commons - Attribution - Sharealike.
Additional terms may apply for the media files.