Iota Cas
Observable Double Star
Excellent (62/100)
Sep: 3.0", Companion: mag 6.9
HIP 11569; Iota Cas
DoubleStar
Cas
Visible
Level 4
Large telescope (10"+) - Requires steady seeing
Physical Properties
Magnitude
4.52
Variable Type
Alpha2 CVn (Magnetic Rotating)
Spectral Type
A5pSr
Star Color
White
(B-V 0.12)
Distance
141.8 ly
Position & Identifiers
RA
02h 29m 04.0s
Dec
+67° 24' 09.0"
Constellation
Cas
HR
707
HIP
11569
Bayer
Iota
Variable ID
Iot Cas
Double Cat
1860
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Visibility
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Multiple Star System
Components
4
Component IDs
AB
Separation
3.0″
Companion Mag
6.9
Companion Sp
F9V
Position Angle
231°
Star Colors
A: White
B: Yellow
Discoverer
STF 262
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 3.0″ · PA: 231° · N up, E left
At limit · 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
ADS 1860A, Alpha CV, 4.45 - 4.53V, 1.74050d. Also magnetic and Sp. period.
AB 4.64 A3Vp, 6.89 F5, 840y, a = 2.27". A* 4.64 A5p, 52.4y, a = 0.113". Unresolved by speckle interferometry. | ABxC 4.51 A5p, 8.40 G7V, probably physical, 6.706" periastron for parabolic orbit. vsini of C =<50k/s.
Also classified B9pCrSr; strong SrII, CrII.
0.012".
Diam. relative to Sun = 2.9.
Survey Image
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