Eta UMi
HIP 79822; Eta UMi; 21 UMi
DoubleStar
UMi
Visible
Level 3
Medium telescope (6-8") - Requires steady seeing
Physical Properties
Magnitude
4.95
Spectral Type
F5V
Star Color
Yellow-white
(B-V 0.37)
Distance
75.8 ly
Position & Identifiers
RA
16h 17m 30.3s
Dec
+75° 45' 19.0"
Constellation
UMi
HR
6116
HIP
79822
Bayer
Eta
Flamsteed
21 UMi
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Visibility
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Multiple Star System
Separation
228.3″
Companion Mag
15.3
Position Angle
125°
Star Colors
A: Yellow-white
Discoverer
LDS1844
Eyepiece View
32x
Dawes: 1.9″
TFOV: 1.6°
Realistic = true angular size
Sep: 228.3″ · PA: 125° · 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
Hyades group.
Survey Image
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