Conjunction Event Detail

    Low Risk
    Low collision probability. Continue monitoring.
    1.398542E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-07T08:36:02+0800
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    1 Object 1

    AOE ID 54752
    NORAD ID 54752
    Object Type PAYLOAD
    Country
    CN CN
    VS

    2 Object 2

    AOE ID 68035
    NORAD ID 68035
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter SHIYAN 21 (SY-21) STARLINK-36943
    Time of Closest Approach 2026-09-07T01:34:52+0000
    Collision Probability (Pc) 1.398542E-6
    Conjunction Distance (km) 2.57 km
    Relative Speed (km/s) 10.909 km/s
    Conjunction Risk Parameters R (Radial): 2.154 | I (In-track): -0.975 | C (Cross-track): -1.006
    Collision Risk Index (CRI) 0.38
    X Position (km) -5154.046 -5155.39
    Position Y (km) -2171.62 -2171.282
    Position Z (km) -3953.178 -3955.341
    Velocity X (km/s) 2.387 -4.463
    Velocity Y (km/s) -7.206 -0.596
    Velocity Z (km/s) 0.825 6.152

    Orbital Parameters 国际轨道数据源

    Parameter SHIYAN 21 (SY-21) STARLINK-36943
    Semimajor Axis (a) 6861.107 km 6843.652 km
    Eccentricity (e) 0.002652 0.000247
    Inclination (i) 35.9903° 97.2829°
    RAAN 282.9067° 197.4002°
    Perigee Argument 238.6174° 95.1742°
    Mean Anomaly (M) 121.1965° 264.9783°
    Apogee 501.168 km 467.209 km
    Perigee 464.772 km 463.821 km
    Orbit Epoch 2026-09-06T13:22:41+0000 2026-09-06T19:28:18+0000

    SHIYAN 21 (SY-21) & STARLINK-36943 Collision Probability (Pc) Trend

    SHIYAN 21 (SY-21) & STARLINK-36943 Collision Probability (Pc) TrendNot Available

    SHIYAN 21 (SY-21) & STARLINK-36943 Miss Distance (Miss Distance) Trend

    SHIYAN 21 (SY-21) & STARLINK-36943 Miss Distance (Miss Distance) TrendNot Available

    SHIYAN 21 (SY-21)Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    STARLINK-36943Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    SHIYAN 21 (SY-21)Collision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-36943Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with SHIYAN 21 (SY-21)

    No nearby objects data