Earth Return Vehicle Reference Version 1.0 Mass Summary Habitat Element: 51,974 kg Life Support System: 6,000 kg Crew Accomm. + Consumables: 22,500 kg Health Care: 2,500 kg EVA equipment: 4,000 kg Comm/info management: 1,500 kg 30 kw PVA power system: 3474 kg Thermal Control system: 2,000 kg Structure: 10,000 kg Science equipment: 900 kg Spares: 3,500 kg SUBTOTAL: 56,374 kg Crew & Samples from Surface: 500 kg ERV MASS AT TEl: 63,274 kg TEl stage dry mass: 5,200 kg Propellant mass : 52,000 kg Aerobrake : 17,300 kg TOTAL TEI MASS : 120,474 kg TOTAL MOI MASS : 131,374 kg NTR Propulsion System: 28,900 kg TMI Propellant : 86,000 kg TOTAL INITIAL MASS: 246,274 kg