Iota Lyrae
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Lyra |
Right ascension | 19h 07m 18.13s[1] |
Declination | +36° 06′ 00.6″[1] |
Apparent magnitude (V) | 5.22[2] |
Characteristics | |
Spectral type | B6IV + ?[2] |
Astrometry | |
Radial velocity (Rv) | ±4.6 −26.00[3] km/s |
Proper motion (μ) | RA: ±0.16 −1.04[1] mas/yr Dec.: ±0.20 −4.29[1] mas/yr |
Parallax (π) | 3.64 ± 0.20[1] mas |
Distance | 900 ± 50 ly (270 ± 20 pc) |
Absolute magnitude (MV) | −1.94[4] |
Orbit[5] | |
Period (P) | 216.93 yr |
Semi-major axis (a) | 0.172″ |
Eccentricity (e) | 0.637 |
Inclination (i) | 145.5° |
Longitude of the node (Ω) | 171.4° |
Periastron epoch (T) | B 1997.28 |
Argument of periastron (ω) (secondary) | 201.2° |
Details | |
Luminosity | 956[4] L☉ |
Other designations | |
Database references | |
SIMBAD | data |
ι Lyrae, Latinised as Iota Lyrae, is a binary star in the constellation Lyra. Its apparent magnitude is 5.22.[2] Located around 275 parsecs (900 ly) distant,[1] it is composed of a blue subgiant primary of spectral type B6IV and an unknown secondary separated by 0.08 arcseconds.[2]
References
- 1 2 3 4 5 6 van Leeuwen, F. (November 2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.
- 1 2 3 4 Eggleton, P. P.; Tokovinin, A. A. (September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869–879. arXiv:0806.2878. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x.
- ↑ Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065.
- 1 2 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015.
- ↑ "Sixth Catalog of Orbits of Visual Binary Stars". United States Naval Observatory. Retrieved 15 March 2017.
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