SBDB - Small-Body Object Monitoring System

The SBDB (Small-Body Database) Close-Approach Monitoring System is designed to track and analyze the trajectories of small celestial objects, such as asteroids and comets, that pass near Earth's orbit. By continuously monitoring their orbits and close-approach data, the system helps assess potential risks and provides early warnings of near-Earth objects (NEOs) that may pose a threat. This real-time tracking enables scientists and space agencies to better understand the dynamics of small-body objects and take preventive measures if necessary.

Explanation of table fields | Color codes explained | 🚨 Email Alert System

List of objects approaching closer than 1 million kilometers

Designation Orbit ID Close Approach Date (UTC) Distance Min Distance Max Distance Velocity V Infinity Uncertainty Size (H)

Objects under observation

All objects 46
Critical objects 1
All your tracks 1 252 109
Last incoming data: Thu, 03 Apr 2025 13:22:00 +0000
The list is automatically updated every 1 minute.

Explanation of table fields

Designation:
  • The official name or identifier assigned to the celestial object.
  • Example: "2025 CO" or "2004 XG".
Orbit ID:
  • A unique identifier for the specific orbital path or solution calculated for the object.
  • Used to track different orbit determinations over time.
Close Approach Date:
  • The date and time when the object makes its closest approach to Earth.
  • Displayed in UTC format.
Distance:
  • The nominal (average) distance between the object and Earth during its closest approach.
  • Measured in Astronomical Units (AU) and converted to kilometers (km).
Min Distance:
  • The minimum possible distance between the object and Earth, considering orbital uncertainties.
  • This represents the best-case scenario for a safe flyby.
Max Distance:
  • The maximum possible distance between the object and Earth, considering orbital uncertainties.
  • This represents the worst-case scenario for the closest approach.
Velocity:
  • The relative velocity at which the object is moving with respect to Earth.
  • Measured in kilometers per hour (km/h).
V Infinity:
  • The object's velocity at infinite distance from Earth, unaffected by Earth's gravity.
  • Represents the object's speed as it approaches the Earth's sphere of influence.
Uncertainty (t_sigma_f):
  • The uncertainty in the time of close approach due to orbital calculations.
  • Smaller values indicate higher confidence in the predicted timing.
Magnitude (H):
  • The absolute magnitude (H) of the object, representing its brightness.
  • Lower values indicate larger and/or more reflective objects.

Color codes explained

🔴 Red - Very Close Approach

Distance: Less than 100,000 km
Description: Extremely close approach. Potentially hazardous, requires attention.

🟠 Orange - Moderately Close Approach

Distance: 100,000 km – 300,000 km
Description: Moderately close approach. No immediate threat, but worth monitoring.

🟡 Yellow - Close Approach

Distance: 300,000 km – 600,000 km
Description: Close flyby. Safe distance but within the monitoring threshold.

🟢 Green - Safe Distance

Distance: Greater than 600,000 km
Description: No threat. Safe distance from Earth.