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Delta Aurigae — Star in Auriga

Magnitude 3.7m Star Auriga (Aur) Visible
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Observe

1Physical Properties

Magnitude 3.72
Spectral Type K0IIIb bright giant
Star Color Orange (B-V 1.00)
Distance 140 ly

2Position & Identifiers

RA 05h 59m 31.6s
Dec +54° 17' 05.0"
Constellation Auriga (Aur)
HR 2077
HIP 28358
HD 40035
SAO 25502
Bayer Delta
Flamsteed 33 Aur

3How easy to spot?

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Equipment Bortle 3 Bortle 4 Bortle 5
Naked eye Easy Medium+ Medium+
50mm finder Easy Easy Easy
150mm scope Easy Easy Easy
Easy Medium Hard Very hard Impossible

Bortle 3 = rural · 4 = outer suburbs · 5 = suburbs

4Visibility

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Best season Nov – Jan (peak: Dec)

5Survey Image

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Explore

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Size Comparison

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Spectral Classification

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Hertzsprung-Russell Diagram

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Stellar Lifecycle

12

Blackbody Spectrum

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Stellar Absorption Spectrum

Simulated absorption spectrum based on spectral type. Hover over lines to identify elements.

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Stellar Fusion

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Light Travel Time Machine

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Relativistic Travel

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