Star profile

Algedi

Alpha 2 Capricorni · Capricornus

3D likeness based on its real data · class G · ~5,500 K

What is Algedi

Algedi marks the head of Capricornus, the old zodiacal sign of the goat-fish. Its name comes from the Arabic «al-jady», «the goat», and it forms an optical pair — two stars that look like neighbours in the sky but in truth lie at vastly different distances. This one is a yellow G-class giant, sun-coloured but considerably larger, perched some 106 light-years from here.

Where it is and when to see it

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 July, when it culminates around midnight.

From London it culminates about 26° above the horizon.
From New York it culminates about 37° above the horizon.
From Sydney it culminates about 69° above the horizon.

It can be seen from anywhere south of 77° N.

It ranks no. 3 in brightness among the 48 stars of Capricornus in our catalogue. To find it, start from Deneb Algedi, the brightest: it lies about 22° away (a fist at arm's length covers about 10°).

The light you see today left it about 110 years ago.

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Astronomical data for Algedi

Constellation: Capricornus
Apparent magnitude: 3.58
Distance: 105.8 light years
Coordinates (J2000): RA 304.514° · Dec -12.545°
Catalogue: HIP 100064 · HD 192947

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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