Delta Ursae Minoris

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Star
δ Ursae Minoris
Ursa Minor constellation map.png
Locator Dot2.gif
AladinLite
Observation
dates equinoxJ2000.0 , epoch : J2000.0
Constellation Little Bear
Right ascension 17 h 32 m 13 s
declination + 86 ° 35 ′ 11 ″
Apparent brightness 4.3 likes
Typing
Spectral class A1 Vn
Astrometry
parallax (17.85 ± 0.48)  mas
distance (183 ± 5)  ly
(56.0 ± 1.5)  pc
Physical Properties
Other names
and catalog entries
Bayer name δ Ursae Minoris
Flamsteed name 23 Ursae Minoris
Bonn survey BD + 86 ° 269
Bright Star Catalog HR 6789 [1]
Henry Draper Catalog HD 166205 [2]
Hipparcos catalog HIP 85822 [3]
SAO catalog SAO 2937 [4]
Tycho catalog TYC 4655-1053-1 [5]
Other names FK5  913

δ Ursae Minoris (Delta Ursae Minoris, δ UMi for short ) is a main sequence star of spectral class A approximately 180 light-years away from the Sun with an apparent magnitude of 4.4 mag.

δ Ursae Minoris has the proper name Yildun from the Turkish yıldız , "star"; Due to the precession of the earth, Yildun was considered by Turkish astronomers to be the North Star around 1500 . Other spellings are: Gildun, Vildiur, Yilduz. Another possible proper name is Pherkard .