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Alterf — Star in Leo

HIP 46750; Lambda Leonis; 4 Leonis

Magnitude 4.3m Star Leo Visible
Star Map
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Observe

1Physical Properties

Magnitude 4.31
Spectral Type K5III giant
Star Color Red (B-V 1.54)
Distance 163 ly

2Position & Identifiers

RA 09h 31m 43.2s
Dec +22° 58' 05.0"
Constellation Leo
HR 3773
HIP 46750
HD 82308
SAO 80885
Bayer Lambda
Flamsteed 4 Leo

3How easy to spot?

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Equipment Bortle 3 Bortle 4 Bortle 5
Naked eye Medium+ 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 Jan – Mar (peak: Feb)

5Survey Image

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Explore

7

Size Comparison

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8

Compare Stars

9

Spectral Classification

10

Hertzsprung-Russell Diagram

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11

Stellar Lifecycle

12

Blackbody Spectrum

13

Stellar Absorption Spectrum

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

14

Stellar Fusion

Discover

15Stellar Notes

Sp. var., 7 - 12d.
Alterf.
16

Light Travel Time Machine

17

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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