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Star profile

Acrab

Beta 1 Scorpii · Scorpius

Hot blue star
3D likeness based on its real data · class B · ~15,000 K

What is Acrab

Acrab marks one of the Scorpion's claws, burning as a hot blue star some 404 light-years away. Its name comes from the Arabic «al-ʿaqrab», simply «the scorpion», and modern astronomers found that what looks like a single point of light is in fact a complex system of several blue suns wheeling around one another. Its light set out when Galileo had only just begun pointing his telescope at the sky.

Where it is and when to see it

Acrab 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: the Sun sits at the opposite point of the sky and the star culminates around midnight. How high it climbs above the horizon depends on the latitude you watch from.

Find it on the sky map

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The signature wall

Stelvia's sky works like a signature wall: anyone can leave their name and a message on a real star, and that signature goes up on the map for everyone to read. Signing is free.

A signature without a lock can be replaced by someone else's. The lock makes the signature permanent and lets you choose a symbolic name for the star, always shown next to the star's catalogue identifier. How the lock works

If you don't have an account yet, we'll ask for an email to confirm it's you: we send you a link and that's it, no password.

A public signature from a real person. The chosen name is a symbolic denomination within Stelvia, with no official standing or IAU recognition: the sky is not for sale and belongs to no one.

Astronomical data for Acrab

Constellation
Scorpius
Apparent magnitude
2.56
Distance
404.2 light years
Coordinates (J2000)
RA 241.359° · Dec -19.805°
Catalogue
HIP 78820 · HD 144217

A symbolic commemorative gift: neither the signature nor the chosen name implies ownership of the star or recognition by the IAU.

Other stars in Scorpius

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

See all 104 stars in Scorpius