Conjunction Event Detail

    High Risk
    High collision probability. Maneuver recommended for primary asset.
    1.722602E-4
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-03T09:15:32+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 53006
    NORAD ID 53006
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter GRACE-FO 1 STARLINK-4290
    Time of Closest Approach 2026-09-04T20:05:23+0000
    Collision Probability (Pc) 1.722602E-4
    Conjunction Distance (km) 0.535 km
    Relative Speed (km/s) 14.399 km/s
    Conjunction Risk Parameters R (Radial): 0.448 | I (In-track): -0.099 | C (Cross-track): 0.275
    Collision Risk Index (CRI) 0.8
    X Position (km) -6643.133 -6643.582
    Position Y (km) -792.349 -792.124
    Position Z (km) -1422.69 -1422.875
    Velocity X (km/s) -1.549 1.794
    Velocity Y (km/s) -0.322 -4.498
    Velocity Z (km/s) 7.464 -5.903

    Orbital Parameters 国际轨道数据源

    Parameter GRACE-FO 1 STARLINK-4290
    Semimajor Axis (a) 6827.941 km 6837.872 km
    Eccentricity (e) 0.001174 0.000093
    Inclination (i) 88.9983° 53.1606°
    RAAN 187.3175° 12.4225°
    Perigee Argument 151.8482° 88.2863°
    Mean Anomaly (M) 208.3410° 271.8247°
    Apogee 457.821 km 460.375 km
    Perigee 441.787 km 459.095 km
    Orbit Epoch 2026-09-02T15:04:29+0000 2026-09-01T16:15:26+0000

    GRACE-FO 1 & STARLINK-4290 Collision Probability (Pc) Trend

    GRACE-FO 1 & STARLINK-4290 Collision Probability (Pc) TrendNot Available

    GRACE-FO 1 & STARLINK-4290 Miss Distance (Miss Distance) Trend

    GRACE-FO 1 & STARLINK-4290 Miss Distance (Miss Distance) TrendNot Available

    GRACE-FO 1Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    STARLINK-4290Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    GRACE-FO 1Collision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-4290Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with GRACE-FO 1

    No nearby objects data