Refine
Year of publication
Institute
Language
- English (139) (remove)
Document Type
- Article (71)
- Conference Proceeding (58)
- Part of a Book (9)
- Other (1)
Keywords
- solar sail (5)
- Sonde (4)
- Eisschicht (3)
- GOSSAMER-1 (3)
- MASCOT (3)
- Mars (2)
- Solar sail (2)
- Spacecraft (2)
- Trajectory Optimization (2)
- multiple NEA rendezvous (2)
- small spacecraft (2)
- Analogue Environments (1)
- Antarctic Glaciology (1)
- Antarctica (1)
- Asteroid Deflection (1)
- Attitude dynamics (1)
- Autofluoreszenzverfahren (1)
- Automated Optimization (1)
- Cryobot (1)
- DLR-ESTEC GOSSAMER roadmap for solar sailing (1)
- Dekontamination (1)
- Evolutionary Neurocontrol (1)
- Extraterrestrial Glaciology (1)
- Glaciological instruments and methods (1)
- Gossamer (1)
- Gossamer structures (1)
- Hybrid Propellants (1)
- Ice Melting (1)
- Ice melting probe (1)
- Ice penetration (1)
- Icy Moons (1)
- Icy moons (1)
- Interplanetary flight (1)
- Interstellar objects (1)
- Jupiter (1)
- Lichtstreuungsbasierte Instrumente (1)
- Low-Thrust Propulsion (1)
- Melting Efficiency (1)
- Melting Performance (1)
- Melting Probe (1)
- Missions (1)
- Multiphase (1)
- Natriumhypochlorit (1)
- Ocean Worlds (1)
- Ocean worlds (1)
- Orbital dynamics (1)
- PHILAE (1)
- Planetary Protection (1)
- Planetary exploration (1)
- Reusable Rocket Engines (1)
- Sequence-Search (1)
- Small Solar System Body Lander (1)
- Small Spacecraft (1)
- Small spacecraft (1)
- Solar Power Sail (1)
- Solar Sail (1)
- Spacecraft Trajectory Optimization (1)
- Subclacial exploration (1)
- Subglacial lakes (1)
- Trajectories (1)
- Wasserstoffperoxid (1)
- asteroid lander (1)
- asteroid sample return (1)
- attitude dynamics (1)
- autofluorescence-based detection system (1)
- flotilla missions (1)
- habitability (1)
- heliosphere (1)
- ice moons (1)
- icy moons (1)
- ion propulsion (1)
- life detection (1)
- light scattering analysis (1)
- low-thrust (1)
- low-thrust trajectory optimization (1)
- near-Earth asteroid (1)
- orbit control (1)
- orbital dynamics (1)
- planetary defence (1)
- responsive space (1)
- sailcraft (1)
- sample return (1)
- small solar system body characterisation (1)
- small spacecraft asteroid lander (1)
- small spacecraft solar sail (1)
- solar sails (1)
- solar system (1)
- space missions (1)
- subglacial aquatic ecosystems (1)
- subsurface ice (1)
- subsurface ice research (1)
- subsurface probe (1)
- system engineering (1)
- underwater vehicle (1)
Solar Sails for Near- and Medium-Term Scientific Deep Space Missions / W. Sebolt ; B. Dachwald
(2005)
Optimization of Interplanetary Rendezvous Trajectories for Solar Sailcraft Using a Neurocontroller
(2002)
Near-Earth asteroid 99942 Apophis provides a typical example for the evolution of asteroid orbits that lead to Earth-impacts after a close Earth-encounter that results in a resonant return. Apophis will have a close Earth-encounter in 2029 with potential very close subsequent Earth-encounters (or even an impact) in 2036 or later, depending on whether it passes through one of several so-called gravitational keyholes during its 2029-encounter. Several pre-2029-deflection scenarios to prevent Apophis from doing this have been investigated so far. Because the keyholes are less than 1 km in size, a pre-2029 kinetic impact is clearly the best option because it requires only a small change in Apophis' orbit to nudge it out of a keyhole. A single solar sail Kinetic Energy Impactor (KEI) spacecraft that impacts Apophis from a retrograde trajectory with a very high relative velocity (75-80 km/s) during one of its perihelion passages at about 0.75 AU would be a feasible option to do this. The spacecraft consists of a 160 m x 160 m, 168 kg solar sail assembly and a 150 kg impactor. Although conventional spacecraft can also achieve the required minimum deflection of 1 km for this approx. 320 m-sized object from a prograde trajectory, our solar sail KEI concept also allows the deflection of larger objects. In this paper, we also show that, even after Apophis has flown through one of the gravitational keyholes in 2029, solar sail Kinetic Energy Impactor (KEI) spacecraft are still a feasible option to prevent Apophis from impacting the Earth, but many KEIs would be required for consecutive impacts to increase the total Earth-miss distance to a safe value. In this paper, we elaborate potential pre- and post-2029 KEI impact scenarios for a launch in 2020, and investigate tradeoffs between different mission parameters.