Eta Ursae Minoris
Epoch J2000.0 Equinox J2000.0
|Right ascension||16h 17m 30.3s|
|Declination||+75° 45' 19"|
|Apparent magnitude (V)||+4.95|
|Absolute magnitude (V)||+2.61|
|Distance||97.3 ± 1.4 ly
(29.8 ± 0.4 pc)
|Spectral type||F5 V|
Eta Ursae Minoris (η UMi, η Ursae Minoris) is a star in the constellation Ursa Minor. It has the traditional names Anwar al Farkadain and Alasco. The first is from the Arabic أنور الفرقدين ’anwar al-farqadayn "the brighter of the two calves", as opposed to Ahfa al Farkadain (ζ UMi) "the dimmer of the two calves"; these names were originally applied to Kochab, and Pherkad, respectively, the other two stars in the rectangle of Ursa Minor.
Eta Ursae Minoris is a yellow-white F-type main sequence dwarf of spectral type F5V with an apparent magnitude of +4.95, making it visible to the naked eye. It is approximately 97 light years from Earth.
- Pizzolato, N.; Maggio, A.; Sciortino, S. (September 2000), "Evolution of X-ray activity of 1-3 Msun late-type stars in early post-main-sequence phases", Astronomy and Astrophysics, 361: 614–628, Bibcode:2000A&A...361..614P
- SIMBAD, Eta Ursae Minoris (accessed 30 July 2014)
- Kaler, James B. "Anwar al Farkadain". Stars. University of Illinois. Retrieved 21 June 2014.
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