Epsilon Eridani
ε Eri · HD 22049 · 3.22 pc · K2V · Nearest confirmed planet to Sol
Section 01
General Information
Epsilon Eridani is the nearest star to the Sun with a confirmed planet (3.22 pc). It hosts a prominent debris disk — a young solar system analogue — and the planet Eps Eri b at ~3.4 AU, similar to Jupiter's orbit. Its relative youth (~440 Myr) and activity level make it an interesting comparison to older solar-type hosts.
Stellar Parameters
| Parameter | Symbol | Value | Source |
|---|---|---|---|
| Effective temperature | Teff | ~5084 K | Literature |
| Surface gravity | log g | ~4.61 | Literature |
| Metallicity | [Fe/H] | ~−0.13 dex | Literature |
| Spectral type | — | K2V | Young, active K dwarf |
| Distance | d | 3.22 pc (10.5 ly) | Hipparcos / Gaia |
Known Planets
| Planet | Mass | Type | Semi-major axis | Hab zone |
|---|---|---|---|---|
| Epsilon Eri b | ~0.76 MJ | Jupiter-mass candidate | 3.39 AU | No — gas giant |
Section 02
NASA Interactive Visualization
Section 04
Our Findings
Section 05
References & Credits
Key Literature
Hatzes et al. (2000), ApJ 544, L145 — planet discovery
Greaves et al. (1998) — debris disk detection
Backman et al. (2009) — disk structure (Spitzer)
Data Sources
NASA/IPAC Exoplanet Archive
SIMBAD / CDS — stellar parameters
Hipparcos / Gaia — parallax & distance
Image Credits
Credit: NASA/JPL — Artist concept of the Epsilon Eridani system
Interactive sky: CDS Aladin Lite v3 / DSS2
NASA Eyes: NASA/JPL-Caltech
Pipeline
HARPS S1D — ESO Science Archive
Analysis: The Exoplanet Codex