File:Ursa_Major_constellation_map.svg · Wikimedia Commons · See Wikimedia Commons
Also 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.
In the Vinony graph
Within Vinony's link graph, 玉衡 is referenced by 305 other articles, and connects out to list of stars in Ursa Major, year and Ursa Major.
It is catalogued under topics including Alpha2 Canum Venaticorum variables, Ap stars and A-type giants.
Its subject is documented across 43 Wikipedia language editions.
Wikidata facts
- Instance of
- rotating variable star
- Location
- Ursa Major
- Constellation
- Ursa Major
- Distance from Earth
- 24.2627
- Diameter
- 5760000
- Radius
- 4.14
- Mass
- 2.91
- Variable-star type
- Alpha² Canum Venaticorum variable
- Image
- Ursa major constellation map-fr.png
Show 17 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
- epoch
- J2000.0
- 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
Article · 中文
玉衡（ε UMa / 大熊座ε）是大熊座最亮的恒星，也是北斗七星之一，是一颗猎犬座α²变星，每隔5.089日而變光為1.76等～1.78等亮。距離地球約80光年。它是大熊座熊尾部最近熊体的星，也是勺柄部最接近勺斗部的星。它还是大熊座移动星群的一分子。历史上，此星常常用于航海贸易的天文导航，因此名列57颗导航星中。
Abstract from DBpedia / Wikipedia · CC BY-SA