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Pi Aur

HIP 28404; Pi Aur; 35 Aur Star Aur Visible Level 1 Naked eye / Binoculars
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Physical Properties

Magnitude 4.26
Spectral Type M3II
Star Color Red (B-V 1.72)
Distance 1087.2 ly

Position & Identifiers

RA 05h 59m 56.1s
Dec +45° 56' 13.0"
Constellation Aur
HR 2091
HIP 28404
Bayer Pi
Flamsteed 35 Aur
Variable ID Pi Aur

Visibility

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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

Lc 4.24 - 4.34V. Radio emission at 2.85cm indicates mass loss.
Large infrared excess.
Ultraviolet FeII emission.

Survey Image

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