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55 Pegasi — Star in Pegasus

Magnitude 4.5m Star Pegasus (Peg) Visible
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Observe

1Physical Properties

Magnitude 4.52
Spectral Type M1IIIab bright giant
Star Color Red (B-V 1.57)
Distance 204 ly

2Position & Identifiers

RA 23h 07m 00.3s
Dec +09° 24' 34.0"
Constellation Pegasus (Peg)
HR 8795
HIP 114144
HD 218329
SAO 127976
Flamsteed 55 Peg

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 Aug – Oct (peak: Sep)

5Survey Image

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Explore

6

Size Comparison

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Compare Stars

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Spectral Classification

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Hertzsprung-Russell Diagram

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Stellar Lifecycle

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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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Light Travel Time Machine

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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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