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Star profile

Iota Andromedae

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

What is Iota Andromedae

Iota Andromedae is a blue-white star that traces the northern end of the chain forming the silhouette of the bound princess, near the Great Square of Pegasus. Hot and young, it shines from some five hundred light-years away with a surface above eleven thousand degrees. Its light set out when Luther nailed his theses to the door at Wittenberg and the religious map of Europe began to fracture.

Where it is and when to see it

Iota Andromedae lies in the northern celestial hemisphere. It is visible to the naked eye under a dark sky. Its best month of the year is October, when it culminates around midnight.

  • From London it never sets and culminates about 82° up.
  • From New York it culminates about 87° above the horizon.
  • From Sydney it culminates about 13° above the horizon.

It can be seen from anywhere north of 47° S.

It ranks no. 13 in brightness among the 81 stars of Andromeda in our catalogue. To find it, start from Alpheratz, the brightest: it lies about 15° away (a fist at arm's length covers about 10°).

The light you see today left it about 500 years ago.

Find it on the sky map

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Leave your signature on Iota Andromedae

Your name and a message go up on the map for everyone to read. Signing is free.

Without a lock, someone else can replace your signature. How the lock works

We'll ask for an email to confirm it's you, 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 Iota Andromedae

Constellation
Andromeda
Apparent magnitude
4.29
Distance
499.5 light years
Coordinates (J2000)
RA 354.534° · Dec 43.268°
Catalogue
HIP 116631 · HD 222173

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

Other stars in Andromeda

Andromeda has 81 stars in Stelvia's catalogue. Here are a few of them.

See all 81 stars in Andromeda