Yildun
HIP 85822; Delta UMi; 23 UMi
HIP 85822; Delta UMi; 23 UMi
DoubleStar
UMi
Visible
Level 4
Large telescope (10"+) - Requires steady seeing
Physical Properties
Magnitude
4.36
Spectral Type
A1Vn
Star Color
White
(B-V 0.02)
Distance
815.4 ly
Position & Identifiers
RA
17h 32m 12.9s
Dec
+86° 35' 11.0"
Constellation
UMi
HR
6789
HIP
85822
Bayer
Delta
Flamsteed
23 UMi
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Visibility
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Multiple Star System
Separation
4.5″
Companion Mag
11.8
Position Angle
67°
Star Colors
A: White
Discoverer
DRS 59
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 4.5″ · PA: 67° · N up, E left
Resolved · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 3.1″
Size Comparison
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Stellar Lifecycle
Spectral Classification
Hertzsprung-Russell Diagram
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Blackbody Spectrum
Stellar Absorption Spectrum
Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.
Stellar Notes
Yildun; Vildiur; Gildun.
Survey Image
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