9 Per
HIP 11060; 9 Per
DoubleStar
Per
Visible
Level 3
Medium telescope (6-8") - Requires steady seeing
Physical Properties
Magnitude
5.17
Spectral Type
A2Ia
Star Color
Yellow-white
(B-V 0.37)
Position & Identifiers
RA
02h 22m 21.4s
Dec
+55° 50' 44.0"
Constellation
Per
HR
685
HIP
11060
Flamsteed
9 Per
Variable ID
V474 Per
Double Cat
1802
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Visibility
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Multiple Star System
Separation
11.5″
Companion Mag
12.0
Position Angle
162°
Star Colors
A: Yellow-white
Discoverer
BU 875
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 11.5″ · PA: 162° · 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 Fusion
Stellar Notes
Amp. 0.05V. Sp. and H alpha profile var.
Fixed.
Per OB1.
Shell star.
Var. in period over 200d.
Survey Image
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