Iota Boo
Observable Double Star
Excellent (66/100)
Sep: 38.8", Companion: mag 7.4
HIP 69713; Iota Boo; 21 Boo
DoubleStar
Boo
Visible
Level 2
Small telescope (4") - Requires steady seeing
Physical Properties
Magnitude
4.75
Range
4.73 - 4.78
Period
0.6 hours
Variable Type
Delta Scuti (Low Amplitude)
Spectral Type
A9V
Star Color
Yellow-white
(B-V 0.20)
Distance
68.0 ly
Position & Identifiers
RA
14h 16m 09.9s
Dec
+51° 22' 02.0"
Constellation
Boo
HR
5350
HIP
69713
Bayer
Iota
Flamsteed
21 Boo
Variable ID
Iot Boo
Double Cat
9198
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Visibility
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Light Curve
Multiple Star System
Components
3
Component IDs
AB
Separation
38.8″
Companion Mag
7.4
Companion Sp
K0V
Position Angle
33°
Star Colors
A: Yellow-white
B: Orange
Discoverer
STFA 26
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 38.8″ · PA: 33° · 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
Delta Sct 4.73 - 4.78V, amp. 0.025B, about 40 min.
AB CPM? B is K0V.
Asellus Secondus.
Survey Image
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