Star profile
Upsilon 1 Eridani
What is Upsilon 1 Eridani
Upsilon-1 Eridani is an orange giant of type K0, swollen to about seven times the Sun's radius and burning slightly cooler than our own star. It sits at 127 light-years along the winding course of the celestial river Eridanus, its amber tone standing apart from the blue youngsters that share the constellation. An old flame on a river of stars.
Where it is and when to see it
Upsilon 1 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 9° above the horizon.
- From New York it culminates about 20° above the horizon.
- From Sydney it culminates about 86° above the horizon.
It can be seen from anywhere south of 60° N.
It ranks no. 33 in brightness among the 129 stars of Eridanus in our catalogue. To find it, start from Achernar, the brightest: it lies about 41° away (a fist at arm's length covers about 10°).
The light you see today left it about 130 years ago.
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Astronomical data for Upsilon 1 Eridani
- Constellation
- Eridanus
- Apparent magnitude
- 4.49
- Distance
- 127.1 light years
- Coordinates (J2000)
- RA 68.377° · Dec -29.766°
- Catalogue
- HIP 21248 · HD 29085
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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
- KeidOmicron 2 Eridani4.43
- 32 Eridani4.46
- Tau 1 Eridani4.47
- HIP 168704.57
- HIP 173514.59