Conjunction Event Detail

    Low Risk
    Low collision probability. Continue monitoring.
    7.299059E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-05T13:09:29+0800
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    1 Object 1

    AOE ID 27941
    NORAD ID 27941
    Object Type PAYLOAD
    Country
    NG NG
    VS

    2 Object 2

    AOE ID 55288
    NORAD ID 55288
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter NIGERIASAT 1 STARLINK-5311
    Time of Closest Approach 2026-09-05T12:31:35+0000
    Collision Probability (Pc) 7.299059E-6
    Conjunction Distance (km) 1.458 km
    Relative Speed (km/s) 14.605 km/s
    Conjunction Risk Parameters R (Radial): -1.33 | I (In-track): 0.163 | C (Cross-track): 0.573
    Collision Risk Index (CRI) 0.52
    X Position (km) 1316.97 1317.796
    Position Y (km) 2857.515 2858.118
    Position Z (km) 6190.831 6191.87
    Velocity X (km/s) -0.573 -3.34
    Velocity Y (km/s) -6.817 6.415
    Velocity Z (km/s) 3.283 -2.246

    Orbital Parameters 国际轨道数据源

    Parameter NIGERIASAT 1 STARLINK-5311
    Semimajor Axis (a) 6974.547 km 6950.188 km
    Eccentricity (e) 0.004284 0.000367
    Inclination (i) 98.0030° 69.9991°
    RAAN 79.8185° 292.7536°
    Perigee Argument 32.0513° 270.5237°
    Mean Anomaly (M) 328.3296° 89.5502°
    Apogee 626.292 km 574.599 km
    Perigee 566.528 km 569.503 km
    Orbit Epoch 2026-09-04T00:47:45+0000 2026-09-04T20:01:19+0000

    NIGERIASAT 1 & STARLINK-5311 Collision Probability (Pc) Trend

    NIGERIASAT 1 & STARLINK-5311 Collision Probability (Pc) TrendNot Available

    NIGERIASAT 1 & STARLINK-5311 Miss Distance (Miss Distance) Trend

    NIGERIASAT 1 & STARLINK-5311 Miss Distance (Miss Distance) TrendNot Available

    NIGERIASAT 1Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    STARLINK-5311Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    NIGERIASAT 1Collision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-5311Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with NIGERIASAT 1

    No nearby objects data