Table 4 Orbit Elements of Apophis (Sun MeanEcliptic J2000).

From: Enhanced Kinetic Impactor for Deflecting Large Potentially Hazardous Asteroids via Maneuvering Space Rocks

Epoch (Sep. 23, 2025)

Before Impact

After Impact

Amount of Change

Semimajor axis, a (AU)

0.922369289714061

0.922369674720639

3.9e-7

Eccentricity, e

0.191167354477951

0.1911659557505984

−1.4e-6

Inclination, i (°)

3.340989755076949

3.340994018347669

4.3e-6

RAAN, \(\Omega \) (°)

203.8997383804165

203.8997328405771

−5.5e-6

Argument of perihelion, \({\rm{\omega }}\) (°)

126.6764883710949

126.6765206259708

3.2e-5

True anomaly, \(\theta \) (°)

228.9928359171914

228.9928091927391

−2.6e-5

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