Yildun
Designations
- Bayer: δ UMi
- Flamsteed: 23 UMi
- Hipparchos: 85822
Data
- Constellation: Ursa Minor
- Apparent Magnitude: 4.34
- Right Ascension (J2000): 17h32m31.21s
- Declination (J2000): +86°35'24".5
- Colour Index (B-V): 182.41±0.92ly
Nomenclature
Yildun
The name is a bastardisation of Turkish yıldız, a general term meaning 'star'. It was mistakenly believed by Renaissance scholars to be a term specifically for Polaris (α UMi), but was in modern times arbitrarily applied to δ UMi.