Xi Boo
Observable Double Star
Excellent (67/100)
Sep: 5.0", Companion: mag 7.0
HIP 72659; Xi Boo; 37 Boo
DoubleStar
Boo
Visible
Level 3
Medium telescope (6-8") - Requires steady seeing
Physical Properties
Magnitude
4.55
Range
4.52 - 4.67
Period
10.137 days
Variable Type
BY Draconis (Spotted Rotating)
Spectral Type
G8Ve+K4Ve
Star Color
Orange
(B-V 0.76)
Distance
20.9 ly
Position & Identifiers
RA
14h 51m 23.3s
Dec
+19° 06' 04.0"
Constellation
Boo
HR
5544
HIP
72659
Bayer
Xi
Flamsteed
37 Boo
Variable ID
Xi Boo
Double Cat
9413
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Visibility
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Light Curve
Multiple Star System
Components
4
Component IDs
AB
Separation
5.0″
Companion Mag
7.0
Companion Sp
K5V
Position Angle
292°
Star Colors
A: Orange
B: Red
Discoverer
STF1888
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 5.0″ · PA: 292° · 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
BY? 4.52 - 4.67V, 10.137d.
AB 4.74 G8V, 6.9 K4V, 151.505y, a = 4.904". Combined mag., colors. Masses 0.89 and 0.74 solar. Perturbation period | 2.2y, a = 0.020" suspected; unresolved by speckle interferometry. Component C optical.
UMa stream.
Also classified G7Ve + K5Ve, H and K in emission.
0.151".
ADS 9413B, K4V, +5.5k/s, variable.
Survey Image
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