Star profile
25 Eridani
What is 25 Eridani
25 Eridani is an orange K-type giant in Eridanus, the celestial river that snakes from Orion's feet down to the edges of the southern sky. At 394 light-years away, its coppery light pulses with the calm of stars that have already left the main sequence. The brightness reaching the pupil tonight left its atmosphere when the telescopes of Galileo and Kepler were about to split classical astronomy in two.
Where it is and when to see it
25 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 38° above the horizon.
- From New York it culminates about 49° above the horizon.
- From Sydney it culminates about 56° above the horizon.
It sits almost on the celestial equator, so it can be seen from nearly the whole planet.
It ranks no. 82 in brightness among the 129 stars of Eridanus in our catalogue. To find it, start from Achernar, the brightest: it lies about 62° away (a fist at arm's length covers about 10°).
The light you see today left it about 390 years ago.
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Astronomical data for 25 Eridani
- Constellation
- Eridanus
- Apparent magnitude
- 5.56
- Distance
- 394.4 light years
- Coordinates (J2000)
- RA 56.235° · Dec -0.297°
- Catalogue
- HIP 17506 · HD 23413
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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 220285.53
- 5 Eridani5.56
- HIP 167805.56
- HIP 217435.56
- HIP 162635.57