Conjunction Event Detail

    ✅
    Low Risk
    Low collision probability. Continue monitoring.
    2.975916E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-19T03:38:24+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 55570
    NORAD ID 55570
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter SHIYAN 21 (SY-21) STARLINK-5737
    Time of Closest Approach 2026-10-20T16:44:07+0000
    Collision Probability (Pc) 2.975916E-6
    Conjunction Distance (km) 1.782 km
    Relative Speed (km/s) 9.652 km/s
    Conjunction Risk Parameters R (Radial): -1.405 | I (In-track): -0.848 | C (Cross-track): 0.691
    Collision Risk Index (CRI) 0.44
    X Position (km) -6833.664 -6835.061
    Position Y (km) 16.842 15.753
    Position Z (km) 589.724 589.915
    Velocity X (km/s) -0.384 0.438
    Velocity Y (km/s) -6.191 -5.597
    Velocity Z (km/s) -4.437 5.161

    Orbital Parameters 国际轨道数据源

    Parameter SHIYAN 21 (SY-21) STARLINK-5737
    Semimajor Axis (a) 6859.501 km 6861.192 km
    Eccentricity (e) 0.002577 0.000080
    Inclination (i) 35.9927° 43.0007°
    RAAN 20.3794° 188.9690°
    Perigee Argument 246.8124° 240.6003°
    Mean Anomaly (M) 112.9895° 119.4769°
    Apogee 499.041 km 483.603 km
    Perigee 463.687 km 482.507 km
    Orbit Epoch 2026-10-18T12:14:31+0000 2026-10-18T03:30:08+0000

    SHIYAN 21 (SY-21) & STARLINK-5737 Collision Probability (Pc) Trend

    SHIYAN 21 (SY-21) & STARLINK-5737 Collision Probability (Pc) TrendNot Available

    SHIYAN 21 (SY-21) & STARLINK-5737 Miss Distance (Miss Distance) Trend

    SHIYAN 21 (SY-21) & STARLINK-5737 Miss Distance (Miss Distance) TrendNot Available

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

    Object 1 Miss Distance TrendNot Available

    STARLINK-5737Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    SHIYAN 21 (SY-21)Collision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-5737Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with SHIYAN 21 (SY-21)

    No nearby objects data