Tau Boo
HIP 67275; Tau Boo; 4 Boo
DoubleStar
Boötes
(Boo)
Visible
Level 6
Professional/Research - Requires steady seeing
Physical Properties
Magnitude
4.50
Variable Type
Delta Scuti (Pulsating)
Spectral Type
F6IV
Star Color
Yellow
(B-V 0.48)
Distance
55 ly
Position & Identifiers
RA
13h 47m 15.7s
Dec
+17° 27' 24.0"
Constellation
Boötes
(Boo)
HR
5185
HIP
67275
Bayer
Tau
Flamsteed
4 Boo
Double Cat
9025
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Visibility
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Multiple Star System
Separation
1.5″
Companion Mag
11.1
Companion Sp
M2V
Position Angle
76°
Star Colors
A: Yellow
B: Red
Discoverer
STT 270
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 1.5″ · PA: 76° · N up, E left
Unresolved · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 2.3″
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
Exoplanets
1 known planet
| Planet | Radius | Mass | Period | Distance |
|---|---|---|---|---|
| tau Boo b | 12.80R⊕ | 5.95M♃ | 3.3d | 51ly |
Habitable Zone
Size & Mass Comparison
Stellar Notes
Delta Sct? 4.40 - 4.58V.
Binary, period several centuries. Companion M2.
0.096".
Light Travel Time Machine
Relativistic Travel
Survey Image
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