Yildun

Yildun (δ Ursae Minoris) is a white star in the constellation Ursa Minor. With an apparent magnitude of 4.36 it is the 775th-brightest star in the night sky, and it is about 182 light-years from Earth.

Finder chart showing where Yildun is in the constellation Ursa Minor
Yildun (circled) in Ursa Minor, with the surrounding constellations and bright stars.
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Facts

ConstellationUrsa Minor
Designationδ Ursae Minoris (Delta Ursae Minoris), HR 6789
Apparent magnitude4.36 (775th brightest)
Spectral typeA1Vn
Colorwhite (B−V 0.02)
Distanceabout 182 light-years
Right ascension17 h 32.2 min
Declination+86.59°
Best monthJuly (at about 9 pm)

Sources: star positions, magnitudes and colors from the Yale Bright Star Catalogue; constellation boundaries and star names from the IAU; areas and distances from Wikidata; stick figures by M. van der Sluys. How the maps are made.

How to find Yildun

Yildun is in Ursa Minor. From 40° N it never sets; it is highest in the north, about 43° up. From 35° S it stays below the horizon. Nearby bright stars: Polaris (4° away), Kochab (13° away) and Alderamin (26° away).

Ursa Minor constellation →

Other named stars in Ursa Minor

PolarisKochabPherkad

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