20 Per
HIP 13490; 20 Per
DoubleStar
Perseus
(Per)
Visible
Level 6
Professional/Research - Requires steady seeing
Physical Properties
Magnitude
5.33
Variable Type
Delta Scuti (Pulsating)
Spectral Type
F4IV
Star Color
Yellow-white
(B-V 0.41)
Distance
297 ly
Position & Identifiers
RA
02h 53m 42.6s
Dec
+38° 20' 15.0"
Constellation
Perseus
(Per)
HR
855
HIP
13490
Flamsteed
20 Per
Double Cat
2200
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Visibility
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Multiple Star System
Components
4
Component IDs
AB
Separation
0.2″
Companion Mag
6.8
Position Angle
290°
Star Colors
A: Yellow-white
B: Yellow
Discoverer
BU 524
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
Delta Sct?
AB 5.9 F4V, 6.5 F6V, 31.37y, a = 0.258". Nearly equal components, 3.7, 4.3 solar. Component C, 9.7v at 14", CPM?
ADS 2200A, 1269d, K 4.8k/s, V0 +2.4k/s, asini 73.0. Orbit questioned by Morbey and Griffin (1987, ApJ, 317, | 343). Resolved by speckle interferometry 1983.93, sep. 0.20"; 1983.94, sep. 0.18".
0.013".
Light Travel Time Machine
Relativistic Travel
Survey Image
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