Alioth
HIP 62956; Epsilon UMa; 77 UMa
HIP 62956; Epsilon UMa; 77 UMa
DoubleStar
UMa
Visible
Level 6
Professional/Research - Requires steady seeing
Physical Properties
Magnitude
1.77
Variable Type
Alpha2 CVn (Magnetic Rotating)
Spectral Type
A1IV
Star Color
Blue-white
(B-V -0.02)
Distance
82.0 ly
Position & Identifiers
RA
12h 54m 01.7s
Dec
+55° 57' 35.0"
Constellation
UMa
HR
4905
HIP
62956
Bayer
Epsilon
Flamsteed
77 UMa
Variable ID
Eps UMa
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Visibility
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Multiple Star System
Separation
0.1″
Position Angle
60°
Star Colors
A: Blue-white
Discoverer
BLM 2
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 0.1″ · PA: 60° · 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
Alpha CV 1.76 - 1.79V, 5.0887d. Spectrum variable. Photometric var. due to UV absorption from overabundant metals.
0.95d and 4.15y. SB unresolved by speckle interferometry 1980.47. Binary nature questioned. Rotational period 5.09d.
"Dipper Stars;" Sirius group; UMa stream; UMa moving cluster.
Also classified A0pCrMn.
ALIOTH; Aliath.
4 solar radii.
Survey Image
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