Star profile
22 Eridani
Hot blue starWhat is 22 Eridani
22 Eridani shines with a blue-white tone along the long channel of the celestial river, a hot B-type star whose light departs from some 496 light-years. It left its surface around 1530, in the heat of the Protestant Reformation. Eridanus winds across the sky like an ancient stream; within that current, this blue star appears as a cold, almost metallic spark against the deep background of the southern winter sky.
Where it is and when to see it
22 Eridani lies in the southern celestial hemisphere. It is visible to the naked eye under a dark sky. Its best month of the year is November, when it culminates around midnight.
- From London it culminates about 33° above the horizon.
- From New York it culminates about 44° above the horizon.
- From Sydney it culminates about 61° above the horizon.
It can be seen from anywhere south of 85° N.
It ranks no. 78 in brightness among the 129 stars of Eridanus in our catalogue. To find it, start from Achernar, the brightest: it lies about 57° away (a fist at arm's length covers about 10°).
The light you see today left it about 500 years ago.
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Astronomical data for 22 Eridani
- Constellation
- Eridanus
- Apparent magnitude
- 5.53
- Distance
- 496.5 light years
- Coordinates (J2000)
- RA 55.160° · Dec -5.211°
- Catalogue
- HIP 17167 · HD 22920
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Other stars in Eridanus
Eridanus has 129 stars in Stelvia's catalogue. Here are a few of them.
- AchernarAlpha Eridani0.45
- CursaBeta Eridani2.78
- AcamarTheta 1 Eridani2.88
- HIP 156435.50
- 62 Eridani5.50
- HIP 79785.52
- HIP 220285.53
- 5 Eridani5.56