🛸 Near Earth Objects Database
Comprehensive database of Near Earth Objects using NASA's NeoWs (Near Earth Object Web Service). Access detailed information about asteroids and comets in Earth's vicinity.
Total NEOs
Known objects
Close Approaches
Recorded approaches
Database Source
SBDB Integration
Today's NEOs
Close approaches today
No NEOs approaching today
Check back tomorrow for new close approaches
📊 NEO Size Classification
Small NEOs (<140m)
Most numerous, limited global impact
H magnitude > 22
Large NEOs (140m-1km)
Potential regional damage
H magnitude 18-22
Giant NEOs (>1km)
Global catastrophe potential
H magnitude < 18
⚠️ Potentially Hazardous Asteroids (PHA)
Definition Criteria
- • Size: Diameter ≥ 140 meters
- • Distance: MOID ≤ 0.05 AU (~7.5M km)
- • Orbit: Earth-crossing or near-Earth
Current Status
Known PHAs:
~2,400
Discovery Rate:
~150/year
🛤️ NEO Orbital Families
Atira
Orbits entirely inside Earth's orbit
a < 1.0 AU, Q < 0.983 AU
Aten
Orbits smaller than Earth's
a < 1.0 AU, Q > 0.983 AU
Apollo
Earth-crossing asteroids
a > 1.0 AU, q < 1.017 AU
Amor
Orbits outside Earth's
a > 1.0 AU, 1.017 < q < 1.3 AU
Orbital Elements: a = semi-major axis, q = perihelion distance, Q = aphelion distance, AU = Astronomical Unit
🔭 NEO Detection Programs
Major Survey Programs
Catalina Sky Survey (CSS)
Arizona-based asteroid discovery program
NEOWISE
Space-based infrared asteroid hunter
LINEAR
MIT Lincoln Laboratory program
NEAT
Near-Earth Asteroid Tracking (historical)
Detection Statistics
📚 NEO Research Resources
Professional Databases
- • JPL SBDB: Small Body Database Browser
- • MPC: Minor Planet Center observations
- • CNEOS: Center for NEO Studies
- • ESA SSA: European Space Situational Awareness
Research Applications
- • Impact Risk Assessment: Planetary defense
- • Mission Planning: Spacecraft trajectories
- • Population Studies: Statistical analysis
- • Physical Characterization: Size, composition
Academic Use: This NEO database interface is designed for educational and research purposes. Professional asteroid tracking and impact risk assessments should always use official sources like NASA/JPL's Center for Near Earth Object Studies and the Minor Planet Center.