Sigma Aqr
Good (57/100)
HIP 111123; Sigma Aqr; 57 Aqr
DoubleStar
Aquarius
(Aqr)
Visible
Level 4
Large telescope (10"+) - Requires steady seeing
Physical Properties
Magnitude
4.82
Spectral Type
A0IV s
Star Color
Blue-white
(B-V -0.06)
Distance
155 ly
Position & Identifiers
RA
22h 30m 38.8s
Dec
-10° 40' 41.0"
Constellation
Aquarius
(Aqr)
HR
8573
HIP
111123
Bayer
Sigma
Flamsteed
57 Aqr
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Visibility
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Multiple Star System
Separation
3.7″
Companion Mag
8.5
Position Angle
10°
Star Colors
A: Blue-white
B: Yellow
Discoverer
HDS3190
Eyepiece View
80x
Dawes: 1.9″
TFOV: 0.6°
Realistic = true angular size
Sep: 3.7″ · PA: 10° · N up, E left
Resolved · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 2.3″
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
In Ursa cluster?
Light Travel Time Machine
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