47 Lib

HIP 77939; 47 Lib DoubleStar Lib Visible Level 5 Expert level - Requires steady seeing

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Physical Properties

Magnitude 5.94

Spectral Type B5V

Star Color Blue-white (B-V -0.01)

Position & Identifiers

RA 15h 55m 00.3s

Dec -19° 22' 59.0"

Constellation Lib

HR 5915

HIP 77939

Flamsteed 47 Lib

Double Cat 9834

Visibility

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Multiple Star System

Separation 0.4″

Companion Mag 8.5

Position Angle 114°

Star Colors A: Blue-white B: Yellow-white

Discoverer HU 1274

Eyepiece View

Telescope Eyepiece

80x Dawes: 1.9″ TFOV: 0.6°

Seeing

Scale Realistic = true angular size

Sep: 0.4″ · PA: 114° · 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

Double Star

Binary.

Group/Cluster

Sco OB2; member of the local association (Pleiades group); Sco-Cen assoc.

Survey Image

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