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

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.

Sources and references:  

Astrophyzix Live Asteroid Tracker

Nasa

L.P.I