Dataset for Article: 'Mars Orbit Anomaly of Interstellar Object 3I/ATLAS between 9 October and 25 November 2025'

Descriptions of data files and program code used in article:

1. 3i_mars_profiles_24h_4series_1d_F.csv:  Data file (CSV format) for Figure 1B with columns for date and time (UTC), distance to Mars osculating orbit nearest point (km), distance to Mars (km), radial speed to Mars osculating orbit nearest point (km/s), radial speed to Mars (km/s).
   Corresponding headers in first row: datetime_utc,d_orbit_km,d_mars_km,s_rad_orbit_km_s,s_rad_mars_km_s 
   
   
2. 3i_mars_tangent_component_speed_ratio_1d_F.csv: Data file (CSV format) for Figure 1B with columns for date and time (UTC), absolute value of 3I/ATLAS heliocentric velocity component parallel to unit tangent vector of nearest point on Mars osculating orbit (km/s), norm of 3I/ATLAS heliocentric velocity (km), ratio of first to second velocity values
   Corresponding headers in first row: datetime_utc,abs_v_parallel_km_s,v_norm_km_s,ratio
   
   
3. 3i_mars_orbit_profile_dv_F.py: Python (python3) program code for calculating values as described in (1).
   
   
4. 3i_mars_orbital_tangent_v_ratio-1d_F.py: Python (python3) program code for calculating values as described in (2).
   
   
5. 3i_mars_dist_f_dD_o3_F.py: Python (python3) program code for calculating the anomaly probability p_a using random sampling over test trajectories.