Yildun - δ Ursae Minoris (delta Ursae Minoris)

Above the horizon. Circumpolar today

Alt: 38.29° Az: 357.01° Direction: South

Yildun, also designated as δ Ursae Minoris (delta Ursae Minoris), is a main-sequence star of spectral class A1 in the constellation of Ursa Minor.

Yildun visual magnitude is 4.36. Because of its moderate brightness, Yildun is easily visible to the naked eye from locations with dark skies, while it might be barely visible, or not visible at all, from light-polluted skies.

Image of Yildun - δ Ursae Minoris (delta Ursae Minoris) star

DSS2 image of Yildun. The red arrow shows the motion of Yildun during the next 10000 years (1.50 arcmin in Right Ascension and 9.33 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 17h 24m 07s

Declination +86° 34’ 00”

Hour Angle 09h 07m 32s

Sidereal Time 02h 31m 40s

J2000

Right Ascension 17h 32m 12s

Declination +86° 35’ 11”

Galactic Coordinates

Galactic Longitude 119.29°

Galactic Latitude 28.24°

Finder Chart

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Finder chart for Yildun - δ Ursae Minoris (delta Ursae Minoris).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 4.36

Class Main-sequence

Absolute magnitude 0.62

Spectral Type A1V

Color Index (B-V) 0.02

Temperature 9882K

The red dot in the diagram below shows where Yildun is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of Yildun. Attribution: Richard Powell / CC BY-SA

Distance, Radial Speed, Proper Motion

Yildun is distant 182.63 light years from the Sun and it is moving towards the Sun at the speed of 8 kilometers per second.

Distance (parsec) 56.02

Distance (light year) 182.63

Radial Speed -8 km/s

Proper Motion RA 0.009 arcsec/y

Proper Motion Dec 0.056"/y

Alternative Designations

Proper Name Yildun

Bayer designation δ Ursae Minoris
(delta Ursae Minoris)

Flamsteed designation 23 Ursae Minoris

Henry Draper Catalogue HD166205

SAO Catalogue SAO2937

Hipparcos Catalogue HIP85822

Durchmusterung Catalogue BD+86 269

FK5 Catalogue 913

Visibility from Your Location

Yildun - δ Ursae Minoris (delta Ursae Minoris) is circumpolar and transits at 04:20 UTC (altitude: 44.3°)

Name:	Glen Head, United States
Latitude:	40° 50' 7.4" N
Longitude:	73° 37' 25.3" W
Timezone:	America/New_York

Set Location

Other stars in Ursa Minor