21 Ari
HIP 10535; 21 Ari
DoubleStar
Ari
Visible
Level 6
Professional/Research - Requires steady seeing
Physical Properties
Magnitude
5.58
Spectral Type
F6V
Star Color
Yellow
(B-V 0.49)
Distance
217.4 ly
Position & Identifiers
RA
02h 15m 42.8s
Dec
+25° 02' 35.0"
Constellation
Ari
HR
657
HIP
10535
Flamsteed
21 Ari
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Visibility
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Multiple Star System
Separation
0.2″
Companion Mag
6.5
Position Angle
35°
Star Colors
A: Yellow
B: Yellow
Discoverer
COU 79
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 0.2″ · PA: 35° · N up, E left
Unresolved · 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
19.35y, a 0.17" or 18.614y, e 0.616, a 0.158", 10.82AU, i 130.1d. Alternate orbit 19.35y, a = 0.17". Speckle | interferometric sep. 0.17", 1983.93.
Survey Image
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