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Larawag — Star in Scorpius

HIP 82396; Epsilon Scorpii; 26 Scorpii

Magnitude 2.3m Star Scorpius (Sco) Visible
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About Larawag

Description

Epsilon Scorpii (no widely used proper name) is an orange giant of spectral type K2.5III at magnitude 2.29, located about 65 light-years from Earth. It sits in the body of Scorpius, between the head and the tail. With a surface temperature of roughly 4,600 K and a luminosity about 72 times solar, it is a fairly typical evolved giant star.

Observing Tips

Located in the central body of Scorpius, Epsilon Sco lies between the bright stars Antares and Shaula. Its warm orange color complements the deep red of nearby Antares. It is best observed during summer months (June through August) from the northern hemisphere, or during the southern winter. From mid-northern latitudes, Scorpius is always low on the southern horizon.

History

Epsilon Scorpii has no traditional proper name, though it was occasionally called Wei in Chinese astronomy, meaning 'the tail.' It was part of various asterisms in different cultural traditions. Its position in the body of the Scorpion has made it a reliable reference point for mapping the constellation since antiquity.

Fun Facts

At only 65 light-years away, Epsilon Scorpii is one of the closest giant stars to our solar system. It is also one of the closest K-type giants visible to the naked eye, making it a good example of what the Sun may look like in about 5 billion years when it becomes a red giant.

Observe

1Physical Properties

Magnitude 2.29
Spectral Type K1III giant
Star Color Red (B-V 1.15)
Distance 64 ly

2Position & Identifiers

RA 16h 50m 09.8s
Dec -34° 17' 36.0"
Constellation Scorpius (Sco)
HR 6241
HIP 82396
HD 151680
SAO 208078
Bayer Epsilon
Flamsteed 26 Sco

3How easy to spot?

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Equipment Bortle 3 Bortle 4 Bortle 5
Naked eye Easy Easy Easy
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 Apr – Jun (peak: May)

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

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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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