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Zuben Elschemali

HIP 74785; Beta Lib; 27 Lib

HIP 74785; Beta Lib; 27 Lib DoubleStar Lib Visible Level 5 Expert level - Requires steady seeing
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Physical Properties

Magnitude 2.61
Spectral Type B7.5IV
Star Color Blue-white (B-V -0.11)
Distance 185.1 ly

Position & Identifiers

RA 15h 17m 00.4s
Dec -09° 22' 59.0"
Constellation Lib
HR 5685
HIP 74785
Bayer Beta
Flamsteed 27 Lib

Visibility

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Multiple Star System

Separation 2.1″
Companion Mag 16.3
Companion Sp M2V
Position Angle 194°
Star Colors A: Blue-white B: Red
Discoverer RBR 7

Eyepiece View

80x Dawes: 1.9″ TFOV: 0.6°
Realistic = true angular size
N E 194° A (2.6) B (16.3)

Sep: 2.1″ · PA: 194° · 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

Described by Eratosthenes (ca. 200 B.C.) as brighter than Antares, by Ptolemy (ca. 150 A.D.) as equal to Antares.
Color excess E(B-V) = -0.02.
C1 neutral carbon continuum shows discontinuities in UV.
Zuben Elschemali; Zuben Eschamali; Zuben el Chamali; Zubenesch; Zubenelg; Kiffa Borealis.

Survey Image

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