Conjunction Event Detail

    ⚠
    Medium Risk
    Monitor closely. Maneuver recommended for primary asset.
    1.818942E-5
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-16T08:51:55+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 66398
    NORAD ID 66398
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter SHIYAN 21 (SY-21) STARLINK-35642
    Time of Closest Approach 2026-10-16T14:09:53+0000
    Collision Probability (Pc) 1.818942E-5
    Conjunction Distance (km) 1.028 km
    Relative Speed (km/s) 9.623 km/s
    Conjunction Risk Parameters R (Radial): -0.869 | I (In-track): -0.429 | C (Cross-track): 0.341
    Collision Risk Index (CRI) 0.6
    X Position (km) -2389.364 -2389.186
    Position Y (km) -5840.046 -5841.03
    Position Z (km) -2649.911 -2650.151
    Velocity X (km/s) 6.745 3.744
    Velocity Y (km/s) -1.226 -3.952
    Velocity Z (km/s) -3.379 5.348

    Orbital Parameters 国际轨道数据源

    Parameter SHIYAN 21 (SY-21) STARLINK-35642
    Semimajor Axis (a) 6859.643 km 6840.847 km
    Eccentricity (e) 0.002550 0.000179
    Inclination (i) 35.9918° 53.1598°
    RAAN 38.3737° 272.4766°
    Perigee Argument 222.1893° 90.2159°
    Mean Anomaly (M) 137.6879° 269.9049°
    Apogee 498.997 km 463.934 km
    Perigee 464.015 km 461.486 km
    Orbit Epoch 2026-10-15T15:14:52+0000 2026-10-15T05:27:47+0000

    SHIYAN 21 (SY-21) & STARLINK-35642 Collision Probability (Pc) Trend

    SHIYAN 21 (SY-21) & STARLINK-35642 Collision Probability (Pc) TrendNot Available

    SHIYAN 21 (SY-21) & STARLINK-35642 Miss Distance (Miss Distance) Trend

    SHIYAN 21 (SY-21) & STARLINK-35642 Miss Distance (Miss Distance) TrendNot Available

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

    Object 1 Miss Distance TrendNot Available

    STARLINK-35642Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    SHIYAN 21 (SY-21)Collision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-35642Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with SHIYAN 21 (SY-21)

    No nearby objects data