Star profile

30 Ceti

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

What is 30 Ceti

30 Ceti is a white-blue F7IV subgiant about 154 light-years away, on the endless back of Cetus the Whale. It is roughly 1.8 billion years old, with an effective temperature near 6,730 K and a radius two and a half times the Sun's. It is in transition: core hydrogen exhausted, it swells slowly, crossing the zone where stars like it leave the main sequence and prepare for a redder life.

Where it is and when to see it

30 Ceti lies in the southern 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 culminates about 29° above the horizon.
From New York it culminates about 40° above the horizon.
From Sydney it culminates about 66° above the horizon.

It can be seen from anywhere south of 80° N.

It ranks no. 78 in brightness among the 111 stars of Cetus in our catalogue. To find it, start from Diphda, the brightest: it lies about 10° away (a fist at arm's length covers about 10°).

The light you see today left it about 150 years ago.

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Astronomical data for 30 Ceti

Constellation: Cetus
Apparent magnitude: 5.71
Distance: 153.8 light years
Coordinates (J2000): RA 16.943° · Dec -9.786°
Catalogue: HIP 5296 · HD 6706

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Other stars in Cetus

Cetus has 111 stars in Stelvia's catalogue. Here are a few of them.

See all 111 stars in Cetus