Conjunction Event Detail

    ✅
    Low Risk
    Low collision probability. Continue monitoring.
    2.614722E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-15T05:21:17+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 69581
    NORAD ID 69581
    Object Type ROCKET BODY
    Country
    CN CN

    Conjunction Constraints

    Parameter SHIYAN 4 (SY-4) CZ-12 R/B
    Time of Closest Approach 2026-10-16T00:50:48+0000
    Collision Probability (Pc) 2.614722E-6
    Conjunction Distance (km) 2.055 km
    Relative Speed (km/s) 14.298 km/s
    Conjunction Risk Parameters R (Radial): 0.651 | I (In-track): 0.553 | C (Cross-track): -1.868
    Collision Risk Index (CRI) 0.43
    X Position (km) 4499.365 4501.259
    Position Y (km) -5230.367 -5229.871
    Position Z (km) -2012.762 -2012.139
    Velocity X (km/s) 0.448 2.801
    Velocity Y (km/s) -2.316 4.414
    Velocity Z (km/s) 7.055 -5.338

    Orbital Parameters 国际轨道数据源

    Parameter SHIYAN 4 (SY-4) CZ-12 R/B
    Semimajor Axis (a) 7165.985 km 7231.692 km
    Eccentricity (e) 0.002337 0.007753
    Inclination (i) 98.6915° 49.9880°
    RAAN 306.1317° 124.8875°
    Perigee Argument 154.5980° 160.1766°
    Mean Anomaly (M) 259.5799° 200.2182°
    Apogee 804.598 km 909.624 km
    Perigee 771.098 km 797.486 km
    Orbit Epoch 2026-10-14T00:30:56+0000 2026-10-14T00:19:50+0000

    SHIYAN 4 (SY-4) & CZ-12 R/B Collision Probability (Pc) Trend

    SHIYAN 4 (SY-4) & CZ-12 R/B Collision Probability (Pc) TrendNot Available

    SHIYAN 4 (SY-4) & CZ-12 R/B Miss Distance (Miss Distance) Trend

    SHIYAN 4 (SY-4) & CZ-12 R/B Miss Distance (Miss Distance) TrendNot Available

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

    Object 1 Miss Distance TrendNot Available

    CZ-12 R/BMiss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    SHIYAN 4 (SY-4)Collision Probability Trend

    Object 1 Probability TrendNot Available

    CZ-12 R/BCollision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with SHIYAN 4 (SY-4)

    No nearby objects data