Conjunction Event Detail

    ✅
    Low Risk
    Low collision probability. Continue monitoring.
    1.515956E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-27T12:41:25+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 69398
    NORAD ID 69398
    Object Type PAYLOAD
    Country
    CN CN

    Conjunction Constraints

    Parameter CALSPHERE 4(A) QIANFAN-181
    Time of Closest Approach 2026-10-27T12:57:22+0000
    Collision Probability (Pc) 1.515956E-6
    Conjunction Distance (km) 2.636 km
    Relative Speed (km/s) 13.436 km/s
    Conjunction Risk Parameters R (Radial): -2.54 | I (In-track): 0.292 | C (Cross-track): -0.636
    Collision Risk Index (CRI) 0.39
    X Position (km) -111.633 -111.99
    Position Y (km) 155.948 155.316
    Position Z (km) 7437.658 7435.125
    Velocity X (km/s) 3.793 -7.167
    Velocity Y (km/s) -6.285 1.478
    Velocity Z (km/s) 0.187 -0.139

    Orbital Parameters 国际轨道数据源

    Parameter CALSPHERE 4(A) QIANFAN-181
    Semimajor Axis (a) 7501.241 km 7446.608 km
    Eccentricity (e) 0.007151 0.000207
    Inclination (i) 89.8846° 89.0032°
    RAAN 121.1216° 348.4098°
    Perigee Argument 91.8213° 97.5975°
    Mean Anomaly (M) 16.7348° 262.5412°
    Apogee 1176.745 km 1070.016 km
    Perigee 1069.463 km 1066.926 km
    Orbit Epoch 2026-10-26T20:52:57+0000 2026-10-26T16:57:18+0000

    CALSPHERE 4(A) & QIANFAN-181 Collision Probability (Pc) Trend

    CALSPHERE 4(A) & QIANFAN-181 Collision Probability (Pc) TrendNot Available

    CALSPHERE 4(A) & QIANFAN-181 Miss Distance (Miss Distance) Trend

    CALSPHERE 4(A) & QIANFAN-181 Miss Distance (Miss Distance) TrendNot Available

    CALSPHERE 4(A)Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    QIANFAN-181Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    CALSPHERE 4(A)Collision Probability Trend

    Object 1 Probability TrendNot Available

    QIANFAN-181Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with CALSPHERE 4(A)

    No nearby objects data