Alula Borealis
HIP 55219; Nu UMa; 54 UMa
HIP 55219; Nu UMa; 54 UMa
DoubleStar
UMa
Visible
Level 4
Large telescope (10"+) - Requires steady seeing
Physical Properties
Magnitude
3.48
Spectral Type
K0IV
Star Color
Red
(B-V 1.40)
Distance
399.0 ly
Position & Identifiers
RA
11h 18m 28.7s
Dec
+33° 05' 39.0"
Constellation
UMa
HR
4377
HIP
55219
Bayer
Nu
Flamsteed
54 UMa
Double Cat
8123
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Visibility
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Multiple Star System
Separation
7.4″
Companion Mag
10.1
Companion Sp
F8
Position Angle
149°
Star Colors
A: Red
B: Yellow
Discoverer
STF1524
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 7.4″ · PA: 149° · 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
CPM.
0.005".
Alula Borealis.
Survey Image
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