Star profile

Epsilon 1 Ara

3D likeness based on its real data · class K · ~4,200 K

What is Epsilon 1 Ara

Epsilon-1 Arae is an aging orange K3 III giant about 1.8 billion years old, whose envelope has swollen to nearly thirty solar radii and pours out 347 times the Sun's light with a warm 4,302 K glow. It shares its corner of the southern Altar with Epsilon-2 Arae, forming a naked-eye optical pair some 360 light-years away.

Where it is and when to see it

Epsilon 1 Ara lies in the southern celestial hemisphere. It is visible to the naked eye under a dark sky. Its best month of the year is June, when it culminates around midnight.

From London it never rises above the horizon.
From New York it never rises above the horizon.
From Sydney it culminates about 71° above the horizon.

It can be seen from anywhere south of 37° N.

It ranks no. 8 in brightness among the 43 stars of Ara in our catalogue. To find it, start from Beta Ara, the brightest: it lies about 4° away (a fist at arm's length covers about 10°).

The light you see today left it about 360 years ago.

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Astronomical data for Epsilon 1 Ara

Constellation: Ara
Apparent magnitude: 4.06
Distance: 360.8 light years
Coordinates (J2000): RA 254.896° · Dec -53.160°
Catalogue: HIP 83153 · HD 152980

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Other stars in Ara

Ara has 43 stars in Stelvia's catalogue. Here are a few of them.

See all 43 stars in Ara