Conjunction Event Detail

    ✅
    Low Risk
    Low collision probability. Continue monitoring.
    1.629514E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-21T23:10:34+0800
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    1 Object 1

    AOE ID 1520
    NORAD ID 1520
    Object Type PAYLOAD
    Country
    US US
    ← VS →

    2 Object 2

    AOE ID 81599
    NORAD ID 81599
    Object Type UNKNOWN
    Country

    Conjunction Constraints

    Parameter CALSPHERE 4(A) TBA - TO BE ASSIGNED
    Time of Closest Approach 2026-10-21T21:02:28+0000
    Collision Probability (Pc) 1.629514E-6
    Conjunction Distance (km) 2.559 km
    Relative Speed (km/s) 13.986 km/s
    Conjunction Risk Parameters R (Radial): -2.489 | I (In-track): -0.194 | C (Cross-track): -0.56
    Collision Risk Index (CRI) 0.39
    X Position (km) 2908.846 2907.473
    Position Y (km) -4787.797 -4786.616
    Position Z (km) -5033.544 -5031.736
    Velocity X (km/s) -2.483 5.449
    Velocity Y (km/s) 4.125 -1.707
    Velocity Z (km/s) -5.433 4.5

    Orbital Parameters 国际轨道数据源

    Parameter CALSPHERE 4(A) TBA - TO BE ASSIGNED
    Semimajor Axis (a) 7501.244 km 7518.032 km
    Eccentricity (e) 0.007141 0.025342
    Inclination (i) 89.8847° 67.2963°
    RAAN 121.1842° 326.4028°
    Perigee Argument 107.2283° 221.6784°
    Mean Anomaly (M) 66.6735° 207.4477°
    Apogee 1176.672 km 1330.414 km
    Perigee 1069.542 km 949.376 km
    Orbit Epoch 2026-10-21T06:25:45+0000 2026-10-20T11:23:24+0000

    CALSPHERE 4(A) & TBA - TO BE ASSIGNED Collision Probability (Pc) Trend

    CALSPHERE 4(A) & TBA - TO BE ASSIGNED Collision Probability (Pc) TrendNot Available

    CALSPHERE 4(A) & TBA - TO BE ASSIGNED Miss Distance (Miss Distance) Trend

    CALSPHERE 4(A) & TBA - TO BE ASSIGNED Miss Distance (Miss Distance) TrendNot Available

    CALSPHERE 4(A)Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    TBA - TO BE ASSIGNEDMiss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    CALSPHERE 4(A)Collision Probability Trend

    Object 1 Probability TrendNot Available

    TBA - TO BE ASSIGNEDCollision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with CALSPHERE 4(A)

    No nearby objects data