Conjunction Event Detail

    High Risk
    High collision probability. Maneuver recommended for primary asset.
    4.463131E-4
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-11T22:23:59+0800
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    1 Object 1

    AOE ID 39270
    NORAD ID 39270
    Object Type PAYLOAD
    Country
    US US
    VS

    2 Object 2

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

    Conjunction Constraints

    Parameter POPACS 3 SHIYAN 23 (SY-23)
    Time of Closest Approach 2026-09-11T21:08:47+0000
    Collision Probability (Pc) 4.463131E-4
    Conjunction Distance (km) 0.318 km
    Relative Speed (km/s) 13.16 km/s
    Conjunction Risk Parameters R (Radial): 0.117 | I (In-track): -0.148 | C (Cross-track): -0.254
    Collision Risk Index (CRI) 0.88
    X Position (km) -1094.684 -1094.984
    Position Y (km) -447.522 -447.602
    Position Z (km) 6878.225 6878.291
    Velocity X (km/s) 5.373 1.855
    Velocity Y (km/s) -5.381 7.282
    Velocity Z (km/s) 0.095 0.768

    Orbital Parameters 国际轨道数据源

    Parameter POPACS 3 SHIYAN 23 (SY-23)
    Semimajor Axis (a) 7079.822 km 6985.038 km
    Eccentricity (e) 0.054642 0.000238
    Inclination (i) 81.0016° 97.7823°
    RAAN 135.9111° 253.7722°
    Perigee Argument 167.7145° 278.7849°
    Mean Anomaly (M) 193.8034° 81.3097°
    Apogee 1088.543 km 608.564 km
    Perigee 314.827 km 605.238 km
    Orbit Epoch 2026-09-11T02:36:20+0000 2026-09-10T17:19:03+0000

    POPACS 3 & SHIYAN 23 (SY-23) Collision Probability (Pc) Trend

    POPACS 3 & SHIYAN 23 (SY-23) Collision Probability (Pc) TrendNot Available

    POPACS 3 & SHIYAN 23 (SY-23) Miss Distance (Miss Distance) Trend

    POPACS 3 & SHIYAN 23 (SY-23) Miss Distance (Miss Distance) TrendNot Available

    POPACS 3Miss 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

    POPACS 3Collision Probability Trend

    Object 1 Probability TrendNot Available

    SHIYAN 23 (SY-23)Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with POPACS 3

    No nearby objects data