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Mercury, with a mass of 3.3 × 10²³ kg and a radius of 2,440 km, is an optimal resource for a Dyson swarm. It is rich in metals (approximately 70% iron-nickel core), has low surface gravity (3.7 m/s², escape velocity 4.25 km/s), lacks an atmosphere, receives intense solar radiation (9,100 W/m²), rotates very slowly (a sidereal period of 58.6 days), and orbits sufficiently close to Venus to allow economical import of volatiles. The objective is to transform Mercury into Dyson swarm elements as quickly as permitted by physics and reasonable current engineering.
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