Star profile
30 Eridani
Hot blue starWhat is 30 Eridani
30 Eridani is a hot blue B-type star kindled some 586 light-years away, along the celestial meander of the river Eridanus. Its surface reaches temperatures that double or triple the Sun's, yielding the violet-blue light only the youngest and most massive stars can sustain. The beam crossing Earth's atmosphere tonight set out around the fifteenth century —the years of the first European ocean voyages— and returns in northern winter, snaking southward.
Where it is and when to see it
30 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. 73 in brightness among the 129 stars of Eridanus in our catalogue. To find it, start from Achernar, the brightest: it lies about 58° away (a fist at arm's length covers about 10°).
The light you see today left it about 590 years ago.
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Astronomical data for 30 Eridani
- Constellation
- Eridanus
- Apparent magnitude
- 5.48
- Distance
- 585.6 light years
- Coordinates (J2000)
- RA 58.174° · Dec -5.361°
- Catalogue
- HIP 18141 · HD 24388
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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
- 37 Eridani5.44
- HIP 193985.45
- HIP 216855.46
- 58 Eridani5.49
- HIP 156435.50