Conjunction Event Detail

    Low Risk
    Low collision probability. Continue monitoring.
    2.790324E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-16T06:54:24+0800
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    1 Object 1

    AOE ID 40143
    NORAD ID 40143
    Object Type PAYLOAD
    Country
    CN CN
    VS

    2 Object 2

    AOE ID 63198
    NORAD ID 63198
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter YAOGAN 21 STARLINK-32904
    Time of Closest Approach 2026-09-17T23:37:07+0000
    Collision Probability (Pc) 2.790324E-6
    Conjunction Distance (km) 1.983 km
    Relative Speed (km/s) 13.742 km/s
    Conjunction Risk Parameters R (Radial): 1.752 | I (In-track): -0.407 | C (Cross-track): -0.835
    Collision Risk Index (CRI) 0.44
    X Position (km) -3053.21 -3053.19
    Position Y (km) 4920.46 4921.882
    Position Z (km) 3667.582 3668.963
    Velocity X (km/s) -1.182 -4.534
    Velocity Y (km/s) 4.033 -5.22
    Velocity Z (km/s) -6.369 3.222

    Orbital Parameters 国际轨道数据源

    Parameter YAOGAN 21 STARLINK-32904
    Semimajor Axis (a) 6861.809 km 6861.158 km
    Eccentricity (e) 0.000932 0.000187
    Inclination (i) 97.1397° 42.9991°
    RAAN 294.9207° 92.7075°
    Perigee Argument 124.2617° 286.7719°
    Mean Anomaly (M) 235.9507° 73.2927°
    Apogee 490.065 km 484.307 km
    Perigee 477.279 km 481.735 km
    Orbit Epoch 2026-09-15T12:48:01+0000 2026-09-15T13:19:55+0000

    YAOGAN 21 & STARLINK-32904 Collision Probability (Pc) Trend

    YAOGAN 21 & STARLINK-32904 Collision Probability (Pc) TrendNot Available

    YAOGAN 21 & STARLINK-32904 Miss Distance (Miss Distance) Trend

    YAOGAN 21 & STARLINK-32904 Miss Distance (Miss Distance) TrendNot Available

    YAOGAN 21Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    STARLINK-32904Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    YAOGAN 21Collision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-32904Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with YAOGAN 21

    No nearby objects data