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30 Cap

HIP 105143; 30 Cap DoubleStar Cap Visible Level 6 Professional/Research - Requires steady seeing
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Physical Properties

Magnitude 5.43
Spectral Type B8III
Star Color Blue-white (B-V -0.12)

Position & Identifiers

RA 21h 17m 57.3s
Dec -17° 59' 07.0"
Constellation Cap
HR 8137
HIP 105143
Flamsteed 30 Cap

Visibility

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Multiple Star System

Separation 0.1″
Star Colors A: Blue-white

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

Suspected SB, 6.1, 6.1v, sep. 0.1".
Sp. shows Mn. Helium-weak star.

Survey Image

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