File:Ursa_Major_constellation_map.svg · Wikimedia Commons · See Wikimedia Commons
Alioth
Sign in to saveAlso known as 77 Ursae Majoris, HD 112185, Epsilon Ursae Majoris, The Jade Sighting-Tube, ε UMa, ε Ursae Majoris, 77 UMa, HIP 62956
Alioth , also called Epsilon Ursae Majoris, is a star in the northern constellation of Ursa Major. The designation is Latinised from ε Ursae Majoris and abbreviated Epsilon UMa or ε UMa. Despite being designated "ε" (epsilon), it is the brightest star in the constellation and at magnitude 1.77 is the thirty-third brightest star in the sky.
Wikidata facts
- Distance from Earth
- 24.2627
- Diameter
- 5760000
- Radius
- 4.14
- Mass
- 2.91
- Image
- Ursa major constellation map-fr.png
Show 16 more facts
- catalog code
- Renson 32580
- spectral class
- A0.P,SB
- apparent magnitude
- 1.731607
- stellar rotational velocity
- 32.9
- effective temperature
- 3
- absolute magnitude
- -0.2
- right ascension
- 193.50728996750
- declination
- 55.95982295694
- parallax
- 40.30
- radial velocity
- -9.8
- metallicity
- -0.10
- surface gravity
- 3000
- right ascension component of proper motion
- 82
- declination component of proper motion
- -15
- age estimated by a dating method
- 300
- Commons category
- Alioth
via Wikidata · CC0
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Article
5 sectionsContents
- Physical characteristics
- Name and etymology
- Namesakes
- See also
- References
Alioth , also called Epsilon Ursae Majoris, is a star in the northern constellation of Ursa Major. The designation is Latinised from ε Ursae Majoris and abbreviated Epsilon UMa or ε UMa. Despite being designated "ε" (epsilon), it is the brightest star in the constellation and at magnitude 1.77 is the thirty-third brightest star in the sky.
It is the star in the tail of the bear closest to its body, and thus the star in the handle of the Big Dipper (or Plough) closest to the bowl. It is also a member of the large and diffuse Ursa Major moving group. Historically, the star was frequently used in celestial navigation in the maritime trade, because it is listed as one of the 57 navigational stars.