Star profile
Upsilon 4 Eridani
Hot blue starWhat is Upsilon 4 Eridani
Upsilon-4 Eridani, also catalogued as 41 Eridani, flows 178 light-years away within the long meander of the celestial river. A hot blue-white B-type star, it sits in a region the ancient Egyptians and Mesopotamians linked to currents and rivermouths. Its light belongs to the southern arm of Eridanus, where the stream pauses before reaching Achernar.
Where it is and when to see it
Upsilon 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 November, when it culminates around midnight.
- From London it culminates about 5° above the horizon.
- From New York it culminates about 16° above the horizon.
- From Sydney it culminates about 90° above the horizon.
It can be seen from anywhere south of 56° N.
It ranks no. 6 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 180 years ago.
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Astronomical data for Upsilon 4 Eridani
- Constellation
- Eridanus
- Apparent magnitude
- 3.55
- Distance
- 178.0 light years
- Coordinates (J2000)
- RA 64.474° · Dec -33.798°
- Catalogue
- HIP 20042 · HD 27376
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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
- ZaurakGamma Eridani2.97
- RanaDelta Eridani3.52
- Phi Eridani3.56
- Chi Eridani3.69
- Tau 4 Eridani3.70