Tau Lib

HIP 76600; Tau Lib; 40 Lib Star Lib Visible Level 1 Naked eye / Binoculars

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Physical Properties

Magnitude 3.66

Spectral Type B2.5 V

Star Color Blue (B-V -0.17)

Distance 366.7 ly

Position & Identifiers

RA 15h 38m 39.4s

Dec -29° 46' 40.0"

Constellation Lib

HR 5812

HIP 76600

Bayer Tau

Flamsteed 40 Lib

Visibility

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Multiple Star System

Separation 0.0″

Companion Mag 6.6

Position Angle -1°

Star Colors A: Blue

Discoverer RIZ 16

Eyepiece View

Telescope Eyepiece

15x Dawes: 1.9″ TFOV: 3.3°

Seeing

Scale Realistic = true angular size

Sep: 0.0″ · PA: -1° · 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

Group/Cluster

Sco OB2; Sco-Cen assoc.; probable member of Sco-Cen cluster; upper Sco region.

Spectral

A Perkins Obs. spectrogram May 8, 1962 showed two spectra, sep. 200k/s, B3V, vsini 149k/s and B5:, vsini 100:k/s.

Survey Image

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