Star profile

Iota Pegasi

Nearby star

3D likeness based on its real data · class F · ~6,500 K

What is Iota Pegasi

Iota Pegasi lies just 38 light-years away — a cosmic neighbour of the Solar System. It is a spectroscopic binary identified in 1899, two near-twin stars circling each other in an almost perfectly circular orbit every ten days. In about four billion years the larger one will swell and begin pouring its mass onto its companion; the final fate is two white dwarfs spinning together in silence.

Where it is and when to see it

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

From London it culminates about 64° above the horizon.
From New York it culminates about 75° above the horizon.
From Sydney it culminates about 31° above the horizon.

It can be seen from anywhere north of 65° S.

It ranks no. 9 in brightness among the 98 stars of Pegasus in our catalogue. To find it, start from Enif, the brightest: it lies about 16° away (a fist at arm's length covers about 10°).

The light you see today left it about 38 years ago.

Find it on the sky map

It opens in your browser. Free, no account, nothing to install.

Leave your signature on Iota Pegasi

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.

Write my signature

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 Pegasi

Constellation: Pegasus
Apparent magnitude: 3.77
Distance: 38.3 light years
Coordinates (J2000): RA 331.753° · Dec 25.345°
Catalogue: HIP 109176 · HD 210027

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

Other stars in Pegasus

Pegasus has 98 stars in Stelvia's catalogue. Here are a few of them.

See all 98 stars in Pegasus