Conjunction Event Detail

    High Risk
    High collision probability. Maneuver recommended for primary asset.
    1.413573E-4
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-03T09:15:35+0800
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    1 Object 1

    AOE ID 43476
    NORAD ID 43476
    Object Type PAYLOAD
    Country
    US US
    VS

    2 Object 2

    AOE ID 53024
    NORAD ID 53024
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter GRACE-FO 1 STARLINK-4289
    Time of Closest Approach 2026-09-03T08:12:45+0000
    Collision Probability (Pc) 1.413573E-4
    Conjunction Distance (km) 0.58 km
    Relative Speed (km/s) 14.429 km/s
    Conjunction Risk Parameters R (Radial): 0.476 | I (In-track): -0.1 | C (Cross-track): 0.315
    Collision Risk Index (CRI) 0.78
    X Position (km) -6734.561 -6735.057
    Position Y (km) -838.158 -837.901
    Position Z (km) -848.519 -848.672
    Velocity X (km/s) -0.912 1.312
    Velocity Y (km/s) -0.249 -4.484
    Velocity Z (km/s) 7.572 -6.04

    Orbital Parameters 国际轨道数据源

    Parameter GRACE-FO 1 STARLINK-4289
    Semimajor Axis (a) 6827.941 km 6837.877 km
    Eccentricity (e) 0.001174 0.000115
    Inclination (i) 88.9983° 53.1609°
    RAAN 187.3175° 7.6643°
    Perigee Argument 151.8482° 81.3724°
    Mean Anomaly (M) 208.3410° 278.7409°
    Apogee 457.821 km 460.528 km
    Perigee 441.787 km 458.952 km
    Orbit Epoch 2026-09-02T15:04:29+0000 2026-09-02T01:42:41+0000

    GRACE-FO 1 & STARLINK-4289 Collision Probability (Pc) Trend

    GRACE-FO 1 & STARLINK-4289 Collision Probability (Pc) TrendNot Available

    GRACE-FO 1 & STARLINK-4289 Miss Distance (Miss Distance) Trend

    GRACE-FO 1 & STARLINK-4289 Miss Distance (Miss Distance) TrendNot Available

    GRACE-FO 1Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    STARLINK-4289Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    GRACE-FO 1Collision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-4289Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with GRACE-FO 1

    No nearby objects data