Conjunction Event Detail

    ✅
    Low Risk
    Low collision probability. Continue monitoring.
    1.391817E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-17T01:17:41+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 64284
    NORAD ID 64284
    Object Type PAYLOAD
    Country
    CN CN

    Conjunction Constraints

    Parameter CALSPHERE 4(A) HULIANWANG DIGUI-31
    Time of Closest Approach 2026-10-18T19:34:06+0000
    Collision Probability (Pc) 1.391817E-6
    Conjunction Distance (km) 2.835 km
    Relative Speed (km/s) 13.962 km/s
    Conjunction Risk Parameters R (Radial): 0.487 | I (In-track): 0.759 | C (Cross-track): 2.688
    Collision Risk Index (CRI) 0.38
    X Position (km) 493.269 495.21
    Position Y (km) -785.142 -783.156
    Position Z (km) -7497.336 -7497.907
    Velocity X (km/s) -3.716 6.389
    Velocity Y (km/s) 6.137 -3.348
    Velocity Z (km/s) -0.914 0.772

    Orbital Parameters 国际轨道数据源

    Parameter CALSPHERE 4(A) HULIANWANG DIGUI-31
    Semimajor Axis (a) 7501.248 km 7546.047 km
    Eccentricity (e) 0.007120 0.000192
    Inclination (i) 89.8853° 86.5023°
    RAAN 121.2394° 332.8281°
    Perigee Argument 120.8626° 105.4220°
    Mean Anomaly (M) 53.8621° 254.7126°
    Apogee 1176.522 km 1169.356 km
    Perigee 1069.700 km 1166.464 km
    Orbit Epoch 2026-10-16T07:49:37+0000 2026-10-16T06:20:39+0000

    CALSPHERE 4(A) & HULIANWANG DIGUI-31 Collision Probability (Pc) Trend

    CALSPHERE 4(A) & HULIANWANG DIGUI-31 Collision Probability (Pc) TrendNot Available

    CALSPHERE 4(A) & HULIANWANG DIGUI-31 Miss Distance (Miss Distance) Trend

    CALSPHERE 4(A) & HULIANWANG DIGUI-31 Miss Distance (Miss Distance) TrendNot Available

    CALSPHERE 4(A)Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    HULIANWANG DIGUI-31Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    CALSPHERE 4(A)Collision Probability Trend

    Object 1 Probability TrendNot Available

    HULIANWANG DIGUI-31Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with CALSPHERE 4(A)

    No nearby objects data