Star profile

Deneb Algedi

Delta Capricorni · Capricornus

Variable star

3D likeness based on its real data · class A · ~8,500 K

What is Deneb Algedi

Deneb Algedi, «the goat's tail» in Arabic, closes the silhouette of Capricornus, the marine hybrid that Babylonian myth imagined as half goat and half fish. It lies surprisingly close, only 38 light years away, and is an eclipsing binary: two stars that cross each other periodically and dim its white light, producing a steady pulse detectable from Earth.

Where it is and when to see it

Deneb Algedi lies in the southern celestial hemisphere. It is visible to the naked eye under a dark sky. Its best month of the year is August, when it culminates around midnight.

From London it culminates about 22° above the horizon.
From New York it culminates about 33° above the horizon.
From Sydney it culminates about 72° above the horizon.

It can be seen from anywhere south of 74° N.

It is the brightest of the 48 stars of Capricornus in our catalogue, which makes it the best starting point for finding your way around the constellation.

The light you see today left it about 39 years ago.

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Astronomical data for Deneb Algedi

Constellation: Capricornus
Apparent magnitude: 2.85
Distance: 38.7 light years
Coordinates (J2000): RA 326.760° · Dec -16.127°
Catalogue: HIP 107556 · HD 207098

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Other stars in Capricornus

Capricornus has 48 stars in Stelvia's catalogue. Here are a few of them.

See all 48 stars in Capricornus