Megrez
Delta UMa
HIP 59774; Delta UMa; 69 UMa
DoubleStar
UMa
Visible
Level 3
Medium telescope (6-8") - Requires steady seeing
Physical Properties
Magnitude
3.31
Spectral Type
A2Vn
Star Color
White
(B-V 0.08)
Distance
80.5 ly
Position & Identifiers
RA
12h 15m 25.6s
Dec
+57° 01' 57.0"
Constellation
UMa
HR
4660
HIP
59774
Bayer
Delta
Flamsteed
69 UMa
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Visibility
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Multiple Star System
Components
3
Component IDs
AB
Separation
181.9″
Companion Mag
10.2
Position Angle
75°
Star Colors
A: White
Discoverer
BLL 29
Eyepiece View
32x
Dawes: 1.9″
TFOV: 1.6°
Realistic = true angular size
Sep: 181.9″ · PA: 75° · 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
"Dipper Stars"; Ursa cluster; Sirius group; UMa stream.
MEGREZ; Kaffa in Becvar.
Survey Image
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