Conjunction Event Detail

    Low Risk
    Low collision probability. Continue monitoring.
    8.734525E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-03T06:38:25+0800
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    1 Object 1

    AOE ID 62564
    NORAD ID 62564
    Object Type PAYLOAD
    Country
    US US
    VS

    2 Object 2

    AOE ID 68128
    NORAD ID 68128
    Object Type ROCKET BODY
    Country
    US US

    Conjunction Constraints

    Parameter STARLINK-11540 FIREFLY ALPHA R/B
    Time of Closest Approach 2026-09-03T02:54:52+0000
    Collision Probability (Pc) 8.734525E-6
    Conjunction Distance (km) 1.376 km
    Relative Speed (km/s) 14.252 km/s
    Conjunction Risk Parameters R (Radial): -0.995 | I (In-track): 0.369 | C (Cross-track): 0.875
    Collision Risk Index (CRI) 0.54
    X Position (km) -2719.485 -2718.476
    Position Y (km) -4108.998 -4108.064
    Position Z (km) 4579.9 4579.875
    Velocity X (km/s) 6.553 -2.857
    Velocity Y (km/s) -4.034 6.086
    Velocity Z (km/s) 0.271 3.755

    Orbital Parameters 国际轨道数据源

    Parameter STARLINK-11540 FIREFLY ALPHA R/B
    Semimajor Axis (a) 6734.535 km 6733.914 km
    Eccentricity (e) 0.000031 0.000382
    Inclination (i) 42.9987° 123.0877°
    RAAN 154.4752° 267.7705°
    Perigee Argument 323.5626° 14.6112°
    Mean Anomaly (M) 36.5220° 345.5065°
    Apogee 356.605 km 358.351 km
    Perigee 356.191 km 353.203 km
    Orbit Epoch 2026-09-02T11:17:15+0000 2026-09-01T18:37:03+0000

    STARLINK-11540 & FIREFLY ALPHA R/B Collision Probability (Pc) Trend

    STARLINK-11540 & FIREFLY ALPHA R/B Collision Probability (Pc) TrendNot Available

    STARLINK-11540 & FIREFLY ALPHA R/B Miss Distance (Miss Distance) Trend

    STARLINK-11540 & FIREFLY ALPHA R/B Miss Distance (Miss Distance) TrendNot Available

    STARLINK-11540Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    FIREFLY ALPHA R/BMiss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    STARLINK-11540Collision Probability Trend

    Object 1 Probability TrendNot Available

    FIREFLY ALPHA R/BCollision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with STARLINK-11540

    No nearby objects data