Space Debris Tracker
INITIALIZING ORBITAL DATA
Tracked Objects
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Total number of cataloged objects currently being tracked in Earth orbit, including active satellites, defunct satellites, rocket bodies, and debris fragments.
0
Cached daily catalog —
TLE
TLE (Two-Line Element set) is a standardized data format used to describe the orbit of an Earth-orbiting object. Published by the US Space Command, TLEs enable prediction of an object's position at any given time.
data
Active Conjunctions (24h)
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A conjunction is a predicted close approach between two orbital objects. Space-Track CDM Public distributes messages for approaches typically within a few kilometers or with significant collision probability. OrbitSmith displays all display-cluster representatives with TCA in the next 24 hours.
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Upcoming CDMs from Space-Track (next 24h)
Shell Risk Indicator
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Estimates a shell-based relative risk indicator using a simplified Kessler spatial density model. It is not the same physical quantity as Space-Track CDM Pc and is not a pair-specific collision probability. See the About page's Data & Methods section for formulas and limitations.
Object 1 (NORAD ID or name)
Object 2 (NORAD ID or name)
Time Window
Relative velocity—
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How is this calculated?
Uses a simplified Kessler spatial density model to produce a shell-based relative indicator, not a CDM-style Pc. The implementation applies altitude-difference scaling factors to keep the educational output in a readable range; these factors are empirical OrbitSmith tuning, not part of the Kessler source model.
⚠ Object sizes not to scale. For informational and educational purposes only. Orbital data may be inaccurate or outdated. Do not use for operational decisions. OrbitSmith assumes no liability. See Data & Methods → · Built by Seita Iizuka · © 2026 OrbitSmith.
Orbital Congestion
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How crowded is each orbital regime? Calculated from the spatial density of tracked objects — total object count divided by shell volume — using the latest cached fused catalog.
LEO
MEO
GEO
HEO
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Major Debris Sources
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Largest debris-generating events in orbit. These breakups — from collisions, explosions, or anti-satellite tests — account for thousands of tracked fragments.
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Reentry Watch
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Tracking and Impact Prediction (TIP) messages from US Space Command. Shows objects predicted to reenter Earth's atmosphere. ▲ WATCH = large object that may survive reentry.
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Upcoming
Recent
Orbit Distribution
LEO (200–2,000 km)0
MEO (2,000–35,786 km)0
GEO (~35,786 km)0
HEO / Other0
Data Sources
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Fused orbital catalog from Space-Track.org GP (18 SDS), CelesTrak GP and SupGP (T.S. Kelso). Conjunction alerts from Space-Track CDM (via CSpOC). Object metadata from GCAT (J. McDowell, CC-BY). Reentry predictions from Space-Track TIP/Decay.
Space-Track.org GP catalog (18 SDS)
CelesTrak GP + SupGP (T.S. Kelso)
Space-Track CDM Public (via CSpOC)
GCAT (J. McDowell, CC-BY)
McCants visual magnitude DB
ESA DISCOS (static reference)
Space-Track TIP / Decay
Earth texture: NASA Blue Marble