1 Boo
HIP 66727; 1 Boo
DoubleStar
Boo
Visible
Level 3
Medium telescope (6-8") - Requires steady seeing
Physical Properties
Magnitude
5.75
Spectral Type
A1V
Star Color
White
(B-V 0.01)
Distance
181.2 ly
Position & Identifiers
RA
13h 40m 40.5s
Dec
+19° 57' 20.0"
Constellation
Boo
HR
5144
HIP
66727
Flamsteed
1 Boo
Double Cat
8991
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Visibility
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Multiple Star System
Components
3
Component IDs
AB
Separation
4.4″
Companion Mag
9.6
Position Angle
133°
Star Colors
A: White
B: Yellow
Discoverer
STF1772
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 4.4″ · PA: 133° · 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
AB binary. B is Am.
Survey Image
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