Conjunction Event Detail

    ✅
    Low Risk
    Low collision probability. Continue monitoring.
    7.592583E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-15T11:31:14+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 68817
    NORAD ID 68817
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter SHIYAN 21 (SY-21) STARLINK-37444
    Time of Closest Approach 2026-10-16T14:24:09+0000
    Collision Probability (Pc) 7.592583E-6
    Conjunction Distance (km) 1.384 km
    Relative Speed (km/s) 11.968 km/s
    Conjunction Risk Parameters R (Radial): 1.331 | I (In-track): -0.235 | C (Cross-track): 0.297
    Collision Risk Index (CRI) 0.53
    X Position (km) 3552.94 3553.536
    Position Y (km) -4275.745 -4276.865
    Position Z (km) -4001.426 -4001.977
    Velocity X (km/s) 6.077 -3.725
    Velocity Y (km/s) 4.597 2.62
    Velocity Z (km/s) 0.461 -6.114

    Orbital Parameters 国际轨道数据源

    Parameter SHIYAN 21 (SY-21) STARLINK-37444
    Semimajor Axis (a) 6859.710 km 6843.671 km
    Eccentricity (e) 0.002534 0.000204
    Inclination (i) 35.9915° 97.2841°
    RAAN 46.9620° 132.5862°
    Perigee Argument 210.4430° 84.9879°
    Mean Anomaly (M) 149.4833° 275.1597°
    Apogee 498.953 km 466.933 km
    Perigee 464.193 km 464.135 km
    Orbit Epoch 2026-10-14T06:19:05+0000 2026-10-14T03:31:08+0000

    SHIYAN 21 (SY-21) & STARLINK-37444 Collision Probability (Pc) Trend

    SHIYAN 21 (SY-21) & STARLINK-37444 Collision Probability (Pc) TrendNot Available

    SHIYAN 21 (SY-21) & STARLINK-37444 Miss Distance (Miss Distance) Trend

    SHIYAN 21 (SY-21) & STARLINK-37444 Miss Distance (Miss Distance) TrendNot Available

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

    Object 1 Miss Distance TrendNot Available

    STARLINK-37444Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    SHIYAN 21 (SY-21)Collision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-37444Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with SHIYAN 21 (SY-21)

    No nearby objects data