Conjunction Event Detail

    ✅
    Low Risk
    Low collision probability. Continue monitoring.
    1.620724E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-20T19:03:10+0800
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    1 Object 1

    AOE ID 30139
    NORAD ID 30139
    Object Type DEBRIS
    Country
    CN CN
    ← VS →

    2 Object 2

    AOE ID 37931
    NORAD ID 37931
    Object Type PAYLOAD
    Country
    CN CN

    Conjunction Constraints

    Parameter FENGYUN 1C DEB SHIYAN 4 (SY-4)
    Time of Closest Approach 2026-10-20T22:34:23+0000
    Collision Probability (Pc) 1.620724E-6
    Conjunction Distance (km) 2.612 km
    Relative Speed (km/s) 14.675 km/s
    Conjunction Risk Parameters R (Radial): 2.574 | I (In-track): -0.091 | C (Cross-track): 0.435
    Collision Risk Index (CRI) 0.39
    X Position (km) 3111.364 3112.842
    Position Y (km) -4389.824 -4391.141
    Position Z (km) 4725.108 4726.81
    Velocity X (km/s) 1.64 -4.024
    Velocity Y (km/s) -4.825 3.082
    Velocity Z (km/s) -5.515 5.473

    Orbital Parameters 国际轨道数据源

    Parameter FENGYUN 1C DEB SHIYAN 4 (SY-4)
    Semimajor Axis (a) 7255.848 km 7165.978 km
    Eccentricity (e) 0.012983 0.002365
    Inclination (i) 98.3564° 98.6911°
    RAAN 116.8601° 311.9589°
    Perigee Argument 127.6950° 137.9703°
    Mean Anomaly (M) 0.4951° 35.1502°
    Apogee 971.917 km 804.789 km
    Perigee 783.505 km 770.893 km
    Orbit Epoch 2026-10-19T19:10:30+0000 2026-10-19T20:20:12+0000

    FENGYUN 1C DEB & SHIYAN 4 (SY-4) Collision Probability (Pc) Trend

    FENGYUN 1C DEB & SHIYAN 4 (SY-4) Collision Probability (Pc) TrendNot Available

    FENGYUN 1C DEB & SHIYAN 4 (SY-4) Miss Distance (Miss Distance) Trend

    FENGYUN 1C DEB & SHIYAN 4 (SY-4) Miss Distance (Miss Distance) TrendNot Available

    FENGYUN 1C DEBMiss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

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

    Object 2 Miss Distance TrendNot Available

    FENGYUN 1C DEBCollision Probability Trend

    Object 1 Probability TrendNot Available

    SHIYAN 4 (SY-4)Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with FENGYUN 1C DEB

    No nearby objects data