Star profile

Omega 2 Scorpii

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

What is Omega 2 Scorpii

Omega-2 Scorpii forms an optical pair with its sister Omega-1 at the head of the Scorpion, just west of red Antares. A yellow type G giant some 291 light-years away, its hue resembles the Sun's but belongs to a much older, far more swollen star. It is a member of the Scorpius–Centaurus association, the largest grouping of young stars near the solar system, though it itself is already crossing the autumn of its stellar biography.

Where it is and when to see it

Omega 2 Scorpii lies in the southern celestial hemisphere. It is visible to the naked eye under a dark sky. Its best month of the year is May, when it culminates around midnight.

From London it culminates about 18° above the horizon.
From New York it culminates about 28° above the horizon.
From Sydney it culminates about 77° above the horizon.

It can be seen from anywhere south of 69° N.

It ranks no. 24 in brightness among the 104 stars of Scorpius in our catalogue. To find it, start from Antares, the brightest: it lies about 8° away (a fist at arm's length covers about 10°).

The light you see today left it about 290 years ago.

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Astronomical data for Omega 2 Scorpii

Constellation: Scorpius
Apparent magnitude: 4.31
Distance: 290.7 light years
Coordinates (J2000): RA 241.851° · Dec -20.869°
Catalogue: HIP 78990 · HD 144608

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Other stars in Scorpius

Scorpius has 104 stars in Stelvia's catalogue. Here are a few of them.

See all 104 stars in Scorpius