Mu Lyrae
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Lyra |
| Right ascension | 118h 24m 13.78580s[1] |
| Declination | +39° 30′ 26.0562″[1] |
| Apparent magnitude (V) | 5.12[2] |
| Characteristics | |
| Spectral type | A0IV |
| Astrometry | |
| Radial velocity (Rv) | -24.0 ± 2[1] km/s |
| Proper motion (μ) | RA: -21.14 ± 0.15[1] mas/yr Dec.: -4.91 ± 0.17[1] mas/yr |
| Parallax (π) | 7.43 ± 0.16[1] mas |
| Distance | 439 ± 9 ly (135 ± 3 pc) |
| Details | |
| Luminosity | 125[3] L☉ |
| Temperature | 8190[3] K |
| Other designations | |
Mu Lyrae (μ Lyr, μ Lyrae) is a star in the constellation Lyra. It has the traditional name Alathfar, from the Arabic الأظفر al-’uz̧fur "the talons (of the swooping eagle)", a name it shares with Eta Lyrae (though the latter is typically spelled Aladfar in English).
Mu Lyrae has apparent magnitude 5.12 and belongs to the spectral class A0IV.[2] Located around 439 light-years distant, it shines with a luminosity approximately 125 times that of the Sun and has a surface temperature of 8190 K.[3]
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 SIMBAD, Mu Lyrae (accessed 25 July 2015)
- 1 2 3 McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (2012). "Fundamental Parameters and Infrared Excesses of Hipparcos Stars". Monthly Notices of the Royal Astronomical Society. 427 (1): 343–57. arXiv:1208.2037. Bibcode:2012MNRAS.427..343M. doi:10.1111/j.1365-2966.2012.21873.x.
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