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Thursday, 15 January 2026

Asteroid 509352 (2007 AG) Close Approach to Earth on 22/01/2026

MONITORING ACTIVE
Astrophyzix Asteroid Close Approach Series
Information and Data Updated: 10 February 2026
Written By: Astrophyzix Science Communication 
Published: 15 January 2026
Image Credit: Nasa/Arecibo/NSF

Asteroid 2007 AG Close Approach


Introduction 

Upcoming Close Approach: On January 22, 2026, the well tracked and observed asteroid 509352 (2007 AG) will pass near Earth at a safe distance beyond the Moon's orbit. This asteroid is classified as a Potentially Hazardous Asteroid but poses no threat on this close approach. 

509352 (2007 AG) — Overview

  • Discovered: January 8, 2007
  • Discovery Site: Mount Lemmon
  • Discoverer: Mt. Lemmon Survey
  • Object Type: Atira Potentially Hazardous Asteroid (PHA)
  • Absolute Magnitude (H): 20.14
  • Observations: 269
  • Oppositions Observed: 8
  • Arc Length: 6,947 days (first used: 2007, last used: 2026)
  • Uncertainty Parameter: 0 (well-determined orbit)

Orbit Characteristics

  • Epoch: 2025-11-21
  • Orbital Period: 0.61 years
  • Semimajor Axis: 0.7207 AU
  • Eccentricity: 0.3742
  • Inclination: 11.94°
  • Perihelion Distance: 0.451 AU (closest approach to Sun)
  • Aphelion Distance: 0.990 AU (farthest distance from Sun)
  • Argument of Perihelion: 5.69°
  • Ascending Node: 283.22°
  • Mean Anomaly: 116.94°
  • Mean Daily Motion: 1.6109°/day
  • Tisserand w.r.t Jupiter: 7.9
  • ΔV w.r.t Earth: 10.9 km/s


Minimum Orbit Intersection Distances (MOID)

  • Mercury: 0.00236 AU
  • Venus: 0.15012 AU
  • Earth: 0.0038 AU (extremely close!)
  • Mars: 0.60527 AU
  • Jupiter: 4.15085 AU
  • Saturn: 8.03793 AU
  • Uranus: 17.523 AU
  • Neptune: 28.8945 AU

Observational Data

  • First Observation Used: 2007-01-08
  • Last Observation Used: 2026-01-14
  • Residual RMS (arc-seconds): 0.69
  • Orbit Computation: MPCORBFIT
  • Perturbers Coarse Indicator: M-v
  • Perturbers Precise Indicator: 003Ek

Key Points

  • 509352 (2007 AG) is a rare Atira asteroid, entirely inside Earth's orbit.
  • Its close proximity to Earth and well-determined orbit make it important for monitoring.
  • Continuous observations allow astronomers to refine its orbit and predict future close approaches.
  • Classified as a Potentially Hazardous Asteroid, though current trajectories are safe.
  • Upcoming Close Approach: On January 22, 2026, 509352 (2007 AG) will pass near Earth at a safe distance beyond the Moon's orbit.
  • Orbital data sourced from NASA JPL CNEOS and the IAU Minor Planet Center; size estimates depend on assumed albedo.

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