Conjunction Event Detail

    ⚠
    Medium Risk
    Monitor closely. Maneuver recommended for primary asset.
    5.762392E-5
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-15T05:21:15+0800
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    1 Object 1

    AOE ID 37931
    NORAD ID 37931
    Object Type PAYLOAD
    Country
    CN CN
    ← VS →

    2 Object 2

    AOE ID 57792
    NORAD ID 57792
    Object Type PAYLOAD
    Country
    CN CN

    Conjunction Constraints

    Parameter SHIYAN 4 (SY-4) TIANQI 21
    Time of Closest Approach 2026-10-14T21:52:11+0000
    Collision Probability (Pc) 5.762392E-5
    Conjunction Distance (km) 0.715 km
    Relative Speed (km/s) 9.028 km/s
    Conjunction Risk Parameters R (Radial): -0.7 | I (In-track): -0.111 | C (Cross-track): 0.085
    Collision Risk Index (CRI) 0.7
    X Position (km) 3706.746 3706.281
    Position Y (km) -3655.823 -3655.448
    Position Z (km) -4957.063 -4956.672
    Velocity X (km/s) 2.481 6.323
    Velocity Y (km/s) -4.626 3.056
    Velocity Z (km/s) 5.263 2.48

    Orbital Parameters 国际轨道数据源

    Parameter SHIYAN 4 (SY-4) TIANQI 21
    Semimajor Axis (a) 7165.985 km 7192.785 km
    Eccentricity (e) 0.002337 0.001313
    Inclination (i) 98.6915° 49.9736°
    RAAN 306.1317° 11.4501°
    Perigee Argument 154.5980° 310.8290°
    Mean Anomaly (M) 259.5799° 49.1483°
    Apogee 804.598 km 824.093 km
    Perigee 771.098 km 805.203 km
    Orbit Epoch 2026-10-14T00:30:56+0000 2026-10-14T05:19:05+0000

    SHIYAN 4 (SY-4) & TIANQI 21 Collision Probability (Pc) Trend

    SHIYAN 4 (SY-4) & TIANQI 21 Collision Probability (Pc) TrendNot Available

    SHIYAN 4 (SY-4) & TIANQI 21 Miss Distance (Miss Distance) Trend

    SHIYAN 4 (SY-4) & TIANQI 21 Miss Distance (Miss Distance) TrendNot Available

    SHIYAN 4 (SY-4)Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    TIANQI 21Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    SHIYAN 4 (SY-4)Collision Probability Trend

    Object 1 Probability TrendNot Available

    TIANQI 21Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with SHIYAN 4 (SY-4)

    No nearby objects data