Conjunction Event Detail

    ✅
    Low Risk
    Low collision probability. Continue monitoring.
    3.761274E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-15T05:21:13+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 49050
    NORAD ID 49050
    Object Type DEBRIS
    Country
    CIS CIS

    Conjunction Constraints

    Parameter SHIYAN 4 (SY-4) SL-16 DEB
    Time of Closest Approach 2026-10-15T21:01:06+0000
    Collision Probability (Pc) 3.761274E-6
    Conjunction Distance (km) 1.562 km
    Relative Speed (km/s) 7.597 km/s
    Conjunction Risk Parameters R (Radial): -0.095 | I (In-track): 1.345 | C (Cross-track): 0.79
    Collision Risk Index (CRI) 0.47
    X Position (km) -1267.619 -1267.409
    Position Y (km) 3189.085 3187.678
    Position Z (km) -6300.034 -6300.679
    Velocity X (km/s) 4.475 -2.942
    Velocity Y (km/s) -4.887 -6.33
    Velocity Z (km/s) -3.395 -2.604

    Orbital Parameters 国际轨道数据源

    Parameter SHIYAN 4 (SY-4) SL-16 DEB
    Semimajor Axis (a) 7165.985 km 7175.368 km
    Eccentricity (e) 0.002337 0.001430
    Inclination (i) 98.6915° 71.0093°
    RAAN 306.1317° 257.9582°
    Perigee Argument 154.5980° 293.8550°
    Mean Anomaly (M) 259.5799° 66.1081°
    Apogee 804.598 km 807.492 km
    Perigee 771.098 km 786.970 km
    Orbit Epoch 2026-10-14T00:30:56+0000 2026-10-13T07:21:13+0000

    SHIYAN 4 (SY-4) & SL-16 DEB Collision Probability (Pc) Trend

    SHIYAN 4 (SY-4) & SL-16 DEB Collision Probability (Pc) TrendNot Available

    SHIYAN 4 (SY-4) & SL-16 DEB Miss Distance (Miss Distance) Trend

    SHIYAN 4 (SY-4) & SL-16 DEB Miss Distance (Miss Distance) TrendNot Available

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

    Object 1 Miss Distance TrendNot Available

    SL-16 DEBMiss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    SHIYAN 4 (SY-4)Collision Probability Trend

    Object 1 Probability TrendNot Available

    SL-16 DEBCollision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with SHIYAN 4 (SY-4)

    No nearby objects data