51 UMa
HIP 54136; 51 UMa
DoubleStar
UMa
Visible
Level 4
Large telescope (10"+) - Requires steady seeing
Physical Properties
Magnitude
6.00
Spectral Type
A3III-IV
Star Color
Yellow-white
(B-V 0.16)
Position & Identifiers
RA
11h 04m 31.2s
Dec
+38° 14' 29.0"
Constellation
UMa
HR
4309
HIP
54136
Flamsteed
51 UMa
Double Cat
8046
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Visibility
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Multiple Star System
Components
3
Component IDs
AB
Separation
7.9″
Companion Mag
11.6
Position Angle
250°
Star Colors
A: Yellow-white
Discoverer
HO 377
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 7.9″ · PA: 250° · 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
AB, CPM.
Survey Image
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