Selixor Technologies — Aerospace Software

Every Mission Ends
Somewhere. We Compute Where.

Nuvvio and Pelagos model what happens after launch and after orbit — reentry, fragmentation, and debris recovery — so the space industry can grow without leaving a mess behind.

12,000+
ACTIVE PAYLOADS IN ORBIT
Every one of them will eventually come down, by design or by decay.
2–3
LAUNCHES WORLDWIDE, DAILY
Each one sheds fairings, adapters, and stages before the payload even reaches orbit.
71%
OF EARTH IS OCEAN
Most uncontrolled reentries and debris fall there — largely unmodeled, until now.
2
SOFTWARE PLATFORMS, ONE LIFECYCLE
Nuvvio governs spacecraft disposal. Pelagos governs launch debris recovery.
Earth's atmosphere seen from orbit
The Industry's Blind Spot

Spaceflight Was Engineered For Liftoff. Not For What Comes Down.

Launch vehicles, satellites, and constellations are certified to extraordinary precision — until the moment their mission ends. What happens after is still handled with rough estimates and wide margins of error, at a time when the industry is launching and deorbiting more hardware than ever before.

Product — Nuvvio

Reentry, Modeled Before It Happens.

End-of-life de-orbit requires mathematically rigorous evidence to satisfy international debris mitigation standards. Nuvvio resolves the coupled equations of motion and heat transfer that govern how a spacecraft actually breaks apart — not just where it might land.

Treating each vehicle as a hierarchical assembly, Nuvvio applies lumped-mass thermal network models to predict the exact altitude of structural yield, melting points, and the aerodynamic transition of every surviving sub-component.

  • AEROTHERMODYNAMIC HEATING Real-time stagnation point heat flux and wall temperature across varying ballistic coefficients.
  • EPHEMERIS INGESTION Direct API integration for TLE data and high-fidelity covariance matrices.
Spacecraft reentry plasma trail
EVENT: DESTRUCTIVE REENTRY STATE: HYPERSONIC TRANSITION
Location of Point Nemo in the South Pacific Ocean
TARGET: SPOA (POINT NEMO) DISPERSION: 99.998% CONFIDENCE
Terminal Dispersion Footprint

Point Nemo Is A Baseline, Not An Answer.

The South Pacific Ocean Uninhabited Area — Point Nemo — is the mandated target for controlled spacecraft disposal. Reaching those coordinates is the easy part. Containing the resulting debris shower is the actual engineering challenge.

On breakup, a spacecraft fragments into thousands of pieces, each with its own aerodynamic signature. Nuvvio simulates the descent of every one, computing a probability density function that keeps the maximum dispersion ellipse strictly inside uninhabited waters — with Casualty Expectancy held below the 1 × 10-4 threshold under all atmospheric conditions.

Open ocean, aerial view
Environmental Constraints

Marine Impact & Oceanic Ecosystem Protection.

Precise footprint containment keeps hypergolic residues and heavy structural metals out of sensitive marine ecosystems and shipping lanes. Isolation minimizes human risk; Nuvvio's ablation modeling minimizes the surviving mass that ever reaches the water.

Live Simulation Output

Monte Carlo Debris Dispersion.

Tracked objects in Earth orbit, including satellites and orbital debris
ENGINE: NUVVIO CORE v2.4.1 SOLVER: STOCHASTIC / RK45 OUTPUT: IMPACT GEOJSON POLYGON
See It In Motion

Nuvvio, Explained.

Falcon 9 rocket launch
EVENT: FAIRING SEPARATION PHASE: ASCENT
Product — Pelagos // Final Development Stage

What Falls On The Way Up Matters Too.

Every launch sheds hardware long before the payload reaches orbit — fairings, adapters, and secondary structures released mid-ascent, then left to fall wherever wind and physics take them.

Pelagos predicts exactly where. It models trajectory, wind influence, atmospheric drag, and marine currents to define a recoverable footprint before debris ever reaches the water — turning cleanup from a search into a plan.

  • TRAJECTORY RECONSTRUCTION Per-component descent modeling for fairings, adapters, and detached structures.
  • MARINE DRIFT PROJECTION Post-splashdown current modeling to define a live recovery search radius.
Launch Corridor Intelligence

From Launch Corridor To Recovery Zone.

Pelagos was first built for the launch corridors near Starbase, correlating real ascent telemetry with drop-zone predictions. It's designed to work the same way for every launch provider, on any coastline.

The output isn't a report — it's a bounded, prioritized search area a recovery vessel can act on before debris disperses or sinks.

SpaceX autonomous recovery vessel at sea
ASSET CLASS: RECOVERY VESSEL STATE: FINAL VALIDATION
Company Roadmap

Built In Stages, Flying Today.

01

Nuvvio Core, Operational

The reentry and fragmentation engine is live, integrated by Varda Space for the decommissioning of returning capsule hardware.

02

SPOA Certification Layer

Casualty Expectancy modeling extends into full Monte Carlo dispersion mapping for regulatory-grade compliance evidence.

03

Pelagos, Final Development

The launch debris recovery engine enters final validation across the launch corridors near Starbase.

04

Multi-Provider Rollout

Pelagos opens beyond a single launch site — built to track fairings, adapters, and stages for any provider, anywhere.

05

One Lifecycle Layer

Nuvvio and Pelagos converge into a single computational layer covering everything from liftoff to ocean floor.

VARDA SPACEORBITAL MANUFACTURING
Current Partner

Manufacturing In Orbit Needs A Way Down.

Varda Space manufactures pharmaceuticals and advanced materials in microgravity, then returns them to Earth inside recoverable reentry capsules — a mission that depends entirely on getting that return right, every time.

Orbital manufacturing can only scale if reentry is boring: predictable, certifiable, and safe by default. That's the same standard Nuvvio was built to hold. Nuvvio is currently used by Varda Space for atmospheric reentry analysis of its returning hardware.

Research & Publications

The Science Underneath.

Risk Modeling

Casualty Expectancy

Computing Ec margins under NASA-STD-8719.14, extended to multi-body fragmentation events.

Flow Physics

Rarefied Hypersonic Flow

Modeling the transitional flow regimes that dominate high-altitude breakup and heating.

Marine Ecology

Debris Density Mapping

Long-term tracking of surviving fragment distribution across the SPOA and launch corridors.

Falcon 9 rocket in hangar
STATUS: PRE-LAUNCH INTEGRATION SCOPE: MULTI-PROVIDER
Where This Goes Next

Debris Management As Infrastructure, Not Afterthought.

As launch cadence keeps climbing, the question isn't whether hardware falls back to Earth — it's whether anyone can say exactly where. Nuvvio and Pelagos are built to answer that for every mission, not just the ones that go wrong.

The goal is a default layer underneath the entire industry: certifiable disposal, recoverable debris, and an ocean that stays a footnote instead of a headline.

Aerospace mission operations center
Get Access

Compute The Footprint.

Access the scientific engines behind Nuvvio and Pelagos — thermal ablation, structural fragmentation, and debris footprint analysis, available through one API.

Request Engineering Access.

For launch providers, satellite operators, and research teams working on end-of-life or debris recovery planning.

REQUEST API CREDENTIALS
Engine

Architecture Overview

Nuvvio's core computational engine is developed under a high-performance architecture, written in C++20 for physical solvers and Rust for concurrency safety.

Orbital Propagation & Dynamics

We utilize adaptive high-order numerical integration methods (RK45) to ensure pinpoint precision across hypersonic flight regimes.

Engine

Aerothermodynamics

Advanced modeling of radiative and convective heat transfer throughout the destructive reentry trajectory.

Ablation & Materials

Detailed tracking of melting points and phase changes for aerospace alloys using lumped-mass thermal network simulations.

Engine

Stochastic Modeling

Automated execution of Monte Carlo simulations (up to n=100,000) to compute probabilistic impact footprint density distributions.

Engine

Pelagos Overview

Pelagos predicts where launch debris — fairings, adapters, and secondary structures — will land after release during ascent.

Inputs

Ascent telemetry, atmospheric wind profiles, and vehicle drag characteristics for each released component.

Outputs

A bounded, time-decaying recovery search area accounting for marine drift after splashdown. Currently in final development across launch corridors near Starbase, built for use by any launch provider.

Engine

Release Notes

Nuvvio Core v2.4.1 introduces 22% SIMD vector optimizations within the thermal solver and native support for the HWM-14 wind model.

Resources

API Documentation

Nuvvio's API provides programmatic access to our reentry propagation engines and thermal ablation models. It is designed to integrate directly into Mission Control software pipelines.

Authentication & Limits

Access requires API key authentication via Bearer Tokens. Standard engineering account rate limits allow up to 500 complete trajectory simulations per hour. Massive Monte Carlo processing requires asynchronous queues via Webhooks.

Payload Format

The engine ingests 6-DOF state vectors (Position X, Y, Z; Velocity Vx, Vy, Vz; and Attitude Quaternions) alongside vehicle inertial properties. Responses are delivered in structured JSON format detailing second-by-second telemetry, thermal breakup altitudes, and impact GeoJSON polygons.

Resources

Telemetry Integration

Full support for bidirectional WebSocket streams and Extended Kalman Filters (EKF) to correlate live flight telemetry data during active campaigns.

Resources

Research & Papers

Technical publications detailing rarefied hypersonic flow modeling and Casualty Expectancy (Ec) computations under NASA-STD-8719.14 specifications.

Company

About Nuvvio

An advanced platform developed by Selixor Technologies to certify the predictable and completely safe atmospheric demise of orbital infrastructure at end-of-life.

Company

Varda Space Partnership

Dedicated support for the atmospheric reentry analysis of Varda Space's returning orbital manufacturing capsules, certifying safe descent and disposal.

Company

Marine Protection

Strict footprint containment targeting the South Pacific Ocean Uninhabited Area (SPOA) to safeguard fragile marine ecosystems and international shipping lanes.

Legal

Security Protocol

Strict AES-256 encryption at rest and TLS 1.3 in transit, backed by isolated single-tenant compute containers rigorously audited under SOC 2 standards.

Legal

Privacy Policy

Ephemeral, RAM-only data processing for state vectors and proprietary mission metrics provided by our aerospace partners.