4 Aqr
HIP 102945; 4 Aqr
DoubleStar
Aqr
Visible
Level 5
Expert level - Requires steady seeing
Physical Properties
Magnitude
5.99
Spectral Type
F5V+F7V
Star Color
Yellow
(B-V 0.46)
Distance
116.5 ly
Position & Identifiers
RA
20h 51m 25.7s
Dec
-05° 37' 35.0"
Constellation
Aqr
HR
7982
HIP
102945
Flamsteed
4 Aqr
Double Cat
14360
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Visibility
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Multiple Star System
Components
4
Component IDs
AB
Separation
0.7″
Companion Mag
7.4
Position Angle
36°
Star Colors
A: Yellow
B: Yellow
Discoverer
STF2729
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 0.7″ · PA: 36° · 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
AB 6.4 F5V, 7.22 F8V, 187y, a = 0.855". Mag., colors for combined light.
0.019".
Survey Image
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