Alkaphrah
HIP 44471; Kappa UMa; 12 UMa
HIP 44471; Kappa UMa; 12 UMa
DoubleStar
UMa
Visible
Level 5
Expert level - Requires steady seeing
Physical Properties
Magnitude
3.60
Spectral Type
A1III
Star Color
White
(B-V 0.00)
Distance
357.1 ly
Position & Identifiers
RA
09h 03m 37.5s
Dec
+47° 09' 24.0"
Constellation
UMa
HR
3594
HIP
44471
Bayer
Kappa
Flamsteed
12 UMa
Double Cat
7158
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Visibility
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Multiple Star System
Separation
0.3″
Companion Mag
4.5
Position Angle
278°
Star Colors
A: White
B: Yellow-white
Discoverer
A 1585
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 0.3″ · PA: 278° · N up, E left
Unresolved · 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
4.2 A0IV-V, 4.4 A0V, 70.1y, a = 0.27" or 64.29y, a = 0.26". Mag., colors for combined light.
0.009".
Survey Image
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