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Yildun

HIP 85822; Delta UMi; 23 UMi

HIP 85822; Delta UMi; 23 UMi DoubleStar UMi Visible Level 4 Large telescope (10"+) - Requires steady seeing
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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

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
N E 67° A (4.4) B (11.8)

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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