81 Leo

HIP 55765; 81 Leo DoubleStar Leo Visible Level 3 Medium telescope (6-8") - Requires steady seeing

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Physical Properties

Magnitude 5.57

Spectral Type F2V

Star Color Yellow-white (B-V 0.36)

Position & Identifiers

RA 11h 25m 36.4s

Dec +16° 27' 23.0"

Constellation Leo

HR 4408

HIP 55765

Flamsteed 81 Leo

Visibility

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Multiple Star System

Separation 55.0″

Companion Mag 10.8

Companion Sp F8V

Position Angle 6°

Star Colors A: Yellow-white B: Yellow

Discoverer HJ 4433

Eyepiece View

Telescope Eyepiece

80x Dawes: 1.9″ TFOV: 0.6°

Seeing

Scale Realistic = true angular size

Sep: 55.0″ · PA: 6° · 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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