Tau UMa
HIP 45075; Tau UMa; 14 UMa
DoubleStar
UMa
Visible
Level 3
Medium telescope (6-8") - Requires steady seeing
Physical Properties
Magnitude
4.67
Spectral Type
F3-4IIIm vs
Star Color
Yellow-white
(B-V 0.35)
Position & Identifiers
RA
09h 10m 55.1s
Dec
+63° 30' 49.0"
Constellation
UMa
HR
3624
HIP
45075
Bayer
Tau
Flamsteed
14 UMa
Double Cat
7211
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Visibility
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Multiple Star System B: optical
Components
3
Component IDs
AB
Separation
51.6″
Companion Mag
11.4
Position Angle
36°
Star Colors
A: Yellow-white
Discoverer
H 5 73
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 51.6″ · PA: 36° · 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 Fusion
Stellar Notes
B, optical.
ADS 7211A, 1062.4d, K 3.9k/s, V0 -8.7k/s, asini 50.0. Unresolved by speckle interferometry.
Violet part of spectrum indicates luminosity III; G-band region, IV-V.
Survey Image
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