Conjunction Event Detail

    Low Risk
    Low collision probability. Continue monitoring.
    1.206379E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-04T19:44:44+0800
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    1 Object 1

    AOE ID 31820
    NORAD ID 31820
    Object Type DEBRIS
    Country
    CN CN
    VS

    2 Object 2

    AOE ID 59539
    NORAD ID 59539
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter FENGYUN 1C DEB STARLINK-31539
    Time of Closest Approach 2026-09-04T22:59:21+0000
    Collision Probability (Pc) 1.206379E-6
    Conjunction Distance (km) 2.627 km
    Relative Speed (km/s) 8.987 km/s
    Conjunction Risk Parameters R (Radial): -0.273 | I (In-track): -2.124 | C (Cross-track): 1.521
    Collision Risk Index (CRI) 0.37
    X Position (km) 638.128 639.134
    Position Y (km) -5689.38 -5688.19
    Position Z (km) -3784.752 -3786.866
    Velocity X (km/s) -1.885 6.415
    Velocity Y (km/s) 3.99 2.753
    Velocity Z (km/s) -6.27 -3.055

    Orbital Parameters 国际轨道数据源

    Parameter FENGYUN 1C DEB STARLINK-31539
    Semimajor Axis (a) 6946.335 km 6861.186 km
    Eccentricity (e) 0.013429 0.000157
    Inclination (i) 98.9441° 43.0047°
    RAAN 100.1858° 57.3398°
    Perigee Argument 236.6933° 265.1068°
    Mean Anomaly (M) 122.1367° 94.9605°
    Apogee 661.481 km 484.127 km
    Perigee 474.915 km 481.971 km
    Orbit Epoch 2026-09-03T01:11:30+0000 2026-09-03T20:51:41+0000

    FENGYUN 1C DEB & STARLINK-31539 Collision Probability (Pc) Trend

    FENGYUN 1C DEB & STARLINK-31539 Collision Probability (Pc) TrendNot Available

    FENGYUN 1C DEB & STARLINK-31539 Miss Distance (Miss Distance) Trend

    FENGYUN 1C DEB & STARLINK-31539 Miss Distance (Miss Distance) TrendNot Available

    FENGYUN 1C DEBMiss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    STARLINK-31539Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    FENGYUN 1C DEBCollision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-31539Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with FENGYUN 1C DEB

    No nearby objects data