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Sputnik X

Sputnik X is a small solar-powered ion probe designed for Kerbin system and inner planets. With more than 5500m/s vacuum dV and a relatively high TWR of 0.21 within Kerbin SOI, it can perform frequent orbital maneuvers and even land on & take off from small celestial bodies. It's equipped with 3 repeatable science instruments: thermometer, GRAVMAX and barometer. Due to its lack of long-range communication capability, it has to operate with relay satellites outside of Kerbin system.

Pure stock, no mods, no DLCs. 25 parts, root part is the Dawn ion engine.