Conjunction Event Detail

    Medium Risk
    Monitor closely. Maneuver recommended for primary asset.
    4.033155E-5
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-16T10:07:50+0800
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    1 Object 1

    AOE ID 28494
    NORAD ID 28494
    Object Type PAYLOAD
    Country
    FR FR
    VS

    2 Object 2

    AOE ID 59728
    NORAD ID 59728
    Object Type PAYLOAD
    Country
    CN CN

    Conjunction Constraints

    Parameter ESSAIM-1 SHIYAN 23 (SY-23)
    Time of Closest Approach 2026-09-18T06:39:09+0000
    Collision Probability (Pc) 4.033155E-5
    Conjunction Distance (km) 0.871 km
    Relative Speed (km/s) 13.379 km/s
    Conjunction Risk Parameters R (Radial): -0.325 | I (In-track): 0.387 | C (Cross-track): -0.709
    Collision Risk Index (CRI) 0.67
    X Position (km) -608.595 -609.388
    Position Y (km) 2009.301 2009.137
    Position Z (km) 6655.717 6656.035
    Velocity X (km/s) 5.301 1.389
    Velocity Y (km/s) -5.003 7.144
    Velocity Z (km/s) 1.991 -2.026

    Orbital Parameters 国际轨道数据源

    Parameter ESSAIM-1 SHIYAN 23 (SY-23)
    Semimajor Axis (a) 6987.161 km 6985.026 km
    Eccentricity (e) 0.000170 0.000243
    Inclination (i) 98.2886° 97.7826°
    RAAN 130.8549° 258.7186°
    Perigee Argument 91.9675° 251.8159°
    Mean Anomaly (M) 268.1734° 108.2793°
    Apogee 610.209 km 608.583 km
    Perigee 607.839 km 605.195 km
    Orbit Epoch 2026-09-14T21:32:27+0000 2026-09-15T18:25:48+0000

    ESSAIM-1 & SHIYAN 23 (SY-23) Collision Probability (Pc) Trend

    ESSAIM-1 & SHIYAN 23 (SY-23) Collision Probability (Pc) TrendNot Available

    ESSAIM-1 & SHIYAN 23 (SY-23) Miss Distance (Miss Distance) Trend

    ESSAIM-1 & SHIYAN 23 (SY-23) Miss Distance (Miss Distance) TrendNot Available

    ESSAIM-1Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    SHIYAN 23 (SY-23)Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    ESSAIM-1Collision Probability Trend

    Object 1 Probability TrendNot Available

    SHIYAN 23 (SY-23)Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with ESSAIM-1

    No nearby objects data