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Lambda Aurigae — Star in Auriga

Magnitude 4.7m Star Auriga (Aur) Visible
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1Physical Properties

Magnitude 4.71
Spectral Type G1.5IV-VFe-1 subgiant
Star Color Yellow (B-V 0.63)
Distance 49 ly

2Position & Identifiers

RA 05h 19m 08.5s
Dec +40° 05' 57.0"
Constellation Auriga (Aur)
HR 1729
HIP 24813
HD 34411
SAO 40233
Bayer Lambda
Flamsteed 15 Aur
Double Cat 3886

3How easy to spot?

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Equipment Bortle 3 Bortle 4 Bortle 5
Naked eye Medium+ Medium Hard+
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

6

Size Comparison

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7

Compare Stars

8

Spectral Classification

9

Hertzsprung-Russell Diagram

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10

Stellar Lifecycle

11

Blackbody Spectrum

12

Stellar Absorption Spectrum

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

13

Stellar Fusion

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14Stellar Notes

B, 13.4v at 29". C, 12.1v at 42" and D, optical.
Epsilon Ind group.
15

Light Travel Time Machine

16

Relativistic Travel

Nearby in the Sky

Other targets within a few degrees — pan your scope a little and keep exploring.

Visibility scores assume a 150 mm Newton at Bortle 4.

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