18 Aqr

HIP 105668; 18 Aqr DoubleStar Aqr Visible Level 3 Medium telescope (6-8") - Requires steady seeing

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Physical Properties

Magnitude 5.49

Spectral Type F1V

Star Color Yellow-white (B-V 0.29)

Position & Identifiers

RA 21h 24m 11.5s

Dec -12° 52' 41.0"

Constellation Aqr

HR 8187

HIP 105668

Flamsteed 18 Aqr

Visibility

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Multiple Star System

Separation 51.3″

Companion Mag 13.0

Position Angle 312°

Star Colors A: Yellow-white

Discoverer HJ 5517

Eyepiece View

Telescope Eyepiece

80x Dawes: 1.9″ TFOV: 0.6°

Seeing

Scale Realistic = true angular size

Sep: 51.3″ · PA: 312° · 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

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Survey Image

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