The fastest routes of approach to dwarf planet Sedna for study its surface and composition at the close range

Current research focuses on designing fast trajectories to the trans-Neptunian object (TNO) (90377) Sedna study surface and composition from a close range. Studying distance can provide unique data about Solar System evolution process including protoplanetary disc related mechanisms. The are determined considering flight time total characteristic velocity (${\Delta}V$) constraints. of for analysis was limited 20 years. direct flight, use gravity assist manoeuvres near Venus, Earth giant planets Jupiter Neptune, with Oberth manoeuvre Sun considered. It is demonstrated that scheme ${\Delta}VEGA$ (${\Delta}V$ Gravity Assist manoeuvre) Jupiter-Neptune leads lowest cost ${\Delta}V$=6.13 km/s launch in 2041. maximum payload schemes ${\Delta}$VEGA 500 kg using Soyuz 2.1.b, 2,000 Proton-M Delta IV Heavy exceeds $12,000$ SLS. For only assist, mass twice less than ones manoeuvre. As possible expansion mission Sedna, it proposed send small spacecraft another TNO during primary Sedna. Five TNOs suitable this scenario found, three extreme 2012 VP113, (541132) Lele\=ak\=uhonua (former 2015 TG387), 2013 SY99) two classical Kuiper Belt objects: (90482) Orcus, (20000) Varuna.