Journey Animation
An interactive visualization of the full 3,700-year flight profile. Use the controls to play, pause, and adjust speed. Toggle between overview and follow-ship camera modes.
Flight Profile
Acceleration Phase
Concordiatra departs Mars L5 orbit during the optimal 2132–2138 departure window, leveraging sequential Jupiter-Saturn gravity assists capable of achieving 8–12 AU/year escape velocities. The 540,000 VASIMR thrusters gradually build velocity toward the 350 km/s cruise target.
Cruise Phase
At 0.12% the speed of light, the ship traverses the interstellar medium for the majority of the journey. During cruise, the thrust vectoring network maintains attitude control and compensates for perturbations from the Local Interstellar Cloud.
Deceleration Phase
The ship begins deceleration without flipping—a critical design decision enabled by the distributed propulsion system. Thrusters on the forward endcap and cylinder walls provide retrograde thrust while maintaining the ship's orientation and rotational stability.
Arrival at Proxima Centauri
After 3,700 years in transit, Concordiatra enters the Proxima Centauri system. The initial population of 20,000 has grown to an estimated 200,000–300,000 across approximately 93 generations.
Optimal Departure Window
Analysis of stellar positioning, planetary alignments, galactic environment, and solar activity patterns identifies the 2132–2138 timeframe as the optimal interstellar departure window from Mars L5.
Proxima Approaches
Proxima Centauri approaches our solar system at 22.2 km/s, reducing mission distance by 2.1 billion km over five decades. Proper motion shifts the target by only 0.06 degrees across the departure window.
Jupiter-Saturn Assists
Three Jupiter alignment windows (2115-17, 2127-29, 2139-41) enable gravity assists. Three-body alignments in the 2130s could achieve 15 AU/year escape velocities.
Interstellar Medium
The trajectory passes through favorable regions of the Local Interstellar Cloud, with navigational X-ray pulsar (XNAV) technology reaching maturity by the 2130s.
Gleissberg Minima
Solar activity patterns including Gleissberg cycle minima create favorable radiation environments for the departure window, reducing shielding requirements during the vulnerable initial phase.
Navigation Systems
Concordiatra uses a Solar System Barycenter coordinate system aligned with the International Celestial Reference System (ICRS). Over 3,700 years, several navigational challenges emerge:
Challenges
- Stellar proper motion shifts target position over millennia
- Galactic curvature effects accumulate at interstellar distances
- Communication delay with Earth grows to 4+ years
- Lead targeting required: aim where Proxima will be, not where it is
Solutions
- X-ray pulsar navigation (XNAV) for autonomous positioning
- Onboard stellar astrometry for continuous course refinement
- Redundant inertial measurement systems
- Pre-computed trajectory with fuel reserves for corrections