Conjunction Event Detail

    ✅
    Low Risk
    Low collision probability. Continue monitoring.
    1.449385E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-21T23:15:16+0800
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    1 Object 1

    AOE ID 902
    NORAD ID 902
    Object Type PAYLOAD
    Country
    US US
    ← VS →

    2 Object 2

    AOE ID 1577
    NORAD ID 1577
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter CALSPHERE 2 PORCUPINE 2
    Time of Closest Approach 2026-10-21T17:29:54+0000
    Collision Probability (Pc) 1.449385E-6
    Conjunction Distance (km) 2.717 km
    Relative Speed (km/s) 13.48 km/s
    Conjunction Risk Parameters R (Radial): -2.31 | I (In-track): 0.568 | C (Cross-track): -1.311
    Collision Risk Index (CRI) 0.38
    X Position (km) 36.415 35.242
    Position Y (km) 28.214 29.023
    Position Z (km) 7439.628 7441.941
    Velocity X (km/s) -1.425 6.189
    Velocity Y (km/s) -7.174 3.949
    Velocity Z (km/s) 0.024 -0.059

    Orbital Parameters 国际轨道数据源

    Parameter CALSPHERE 2 PORCUPINE 2
    Semimajor Axis (a) 7439.714 km 7501.324 km
    Eccentricity (e) 0.001745 0.007159
    Inclination (i) 90.2326° 90.0424°
    RAAN 78.7521° 212.5382°
    Perigee Argument 216.9651° 107.1624°
    Mean Anomaly (M) 317.1201° 53.8450°
    Apogee 1074.558 km 1176.889 km
    Perigee 1048.596 km 1069.485 km
    Orbit Epoch 2026-10-21T03:42:49+0000 2026-10-21T07:04:04+0000

    CALSPHERE 2 & PORCUPINE 2 Collision Probability (Pc) Trend

    CALSPHERE 2 & PORCUPINE 2 Collision Probability (Pc) TrendNot Available

    CALSPHERE 2 & PORCUPINE 2 Miss Distance (Miss Distance) Trend

    CALSPHERE 2 & PORCUPINE 2 Miss Distance (Miss Distance) TrendNot Available

    CALSPHERE 2Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    PORCUPINE 2Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    CALSPHERE 2Collision Probability Trend

    Object 1 Probability TrendNot Available

    PORCUPINE 2Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with CALSPHERE 2

    No nearby objects data