Star profile
4 Eridani
What is 4 Eridani
4 Eridani is a white A-type star lying a little over one hundred and fifty light-years away, along the long winding course of the celestial River that snakes across the southern hemisphere. Its light set off in the mid-nineteenth century, when astronomy was beginning to rely on photography to record the sky. Faint to the naked eye, its clean white tone makes it one of many small references that help trace Eridanus.
Where it is and when to see it
4 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 October, when it culminates around midnight.
- From London it culminates about 15° above the horizon.
- From New York it culminates about 25° above the horizon.
- From Sydney it culminates about 80° above the horizon.
It can be seen from anywhere south of 66° N.
It ranks no. 69 in brightness among the 129 stars of Eridanus in our catalogue. To find it, start from Achernar, the brightest: it lies about 36° away (a fist at arm's length covers about 10°).
The light you see today left it about 160 years ago.
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Astronomical data for 4 Eridani
- Constellation
- Eridanus
- Apparent magnitude
- 5.44
- Distance
- 155.6 light years
- Coordinates (J2000)
- RA 44.349° · Dec -23.862°
- Catalogue
- HIP 13782 · HD 18454
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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 188595.38
- HIP 202645.38
- 63 Eridani5.39
- 37 Eridani5.44
- HIP 193985.45