67P/Churyumov-Gerasimenko Comet
67P/Churyumov-Gerasimenko — comet with 6.44-year orbit, 4.1 km nucleus. Rosetta/Philae landing site 2014 — most extensively studied comet. Bi-lobed contact binary (4.1×3.3 km), mass ~1.0×10¹³…
View in the 3D map →Data
| Nucleus size | 4.1 km |
|---|---|
| Orbital period | 6.44 years |
| Perihelion | 1.243 AU |
| Aphelion | 5.684 AU |
| Eccentricity | 0.6405 |
| Discovered | 1969 |
| Next perihelion | 2021-Nov-02 |
| Composition | H2O ice, CO2 ice, H2S, NH3, Organic molecules (glycine), Dust |
Details
Rosetta/Philae landing site 2014 — most extensively studied comet. Bi-lobed contact binary (4.1×3.3 km), mass ~1.0×10¹³ kg, density 0.533 g/cm³ (highly porous rubble pile). Confirmed glycine (simplest amino acid) and phosphorus — key prebiotic molecules. Water D/H ratio ~3× Earth VSMOW. CO₂/H₂O ratio ~0.11, with significant H₂S, NH₃. 67P's accessible orbit (q=1.24 AU, low inclination 7°) makes it the most feasible ISRU comet target. Potential water extraction: estimated 10⁹ kg accessible ice. Perihelion reachable with ΔV ~8 km/s from LEO — viable for future mining missions.
Sources / 数据来源
JPL Small-Body Database / IAU Minor Planet Center