Star profile

Iota Delphinus

3D likeness based on its real data · class A · ~8,500 K

What is Iota Delphinus

Iota Delphini is a white A-type star about 189 light-years away, in the small silhouette of the dolphin that leaps between the Eagle and Pegasus. The constellation is tiny but beloved —a marine emblem sent skyward for having persuaded the nereid Amphitrite to accept Poseidon. Iota shines on the curve of the back, part of the leap's impulse.

Where it is and when to see it

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

From London it culminates about 50° above the horizon.
From New York it culminates about 61° above the horizon.
From Sydney it culminates about 45° above the horizon.

It can be seen from anywhere north of 79° S.

It ranks no. 11 in brightness among the 18 stars of Delphinus in our catalogue. To find it, start from Rotanev, the brightest: it lies about 3° away (a fist at arm's length covers about 10°).

The light you see today left it about 190 years ago.

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Astronomical data for Iota Delphinus

Constellation: Delphinus
Apparent magnitude: 5.42
Distance: 189.0 light years
Coordinates (J2000): RA 309.455° · Dec 11.378°
Catalogue: HIP 101800 · HD 196544

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

Other stars in Delphinus

Delphinus has 18 stars in Stelvia's catalogue. Here are a few of them.

See all 18 stars in Delphinus