Conjunction Event Detail

    ✅
    Low Risk
    Low collision probability. Continue monitoring.
    1.678284E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-19T01:10:47+0800
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    1 Object 1

    Name ERS 1
    AOE ID 21574
    NORAD ID 21574
    Object Type PAYLOAD
    Country
    ESA ESA
    ← VS →

    2 Object 2

    AOE ID 39241
    NORAD ID 39241
    Object Type PAYLOAD
    Country
    CN CN

    Conjunction Constraints

    Parameter ERS 1 YAOGAN 17C
    Time of Closest Approach 2026-10-18T20:21:09+0000
    Collision Probability (Pc) 1.678284E-6
    Conjunction Distance (km) 2.572 km
    Relative Speed (km/s) 14.914 km/s
    Conjunction Risk Parameters R (Radial): -0.218 | I (In-track): 0.427 | C (Cross-track): 2.527
    Collision Risk Index (CRI) 0.39
    X Position (km) -5129.731 -5131.352
    Position Y (km) 4664.202 4662.395
    Position Z (km) 1707.675 1706.828
    Velocity X (km/s) -0.507 -1.178
    Velocity Y (km/s) 2.046 -3.688
    Velocity Z (km/s) -7.169 6.582

    Orbital Parameters 国际轨道数据源

    Parameter ERS 1 YAOGAN 17C
    Semimajor Axis (a) 7138.019 km 7467.033 km
    Eccentricity (e) 0.003083 0.043819
    Inclination (i) 98.7741° 63.3832°
    RAAN 314.7259° 131.4250°
    Perigee Argument 262.0508° 12.1280°
    Mean Anomaly (M) 97.7179° 348.9896°
    Apogee 781.890 km 1416.097 km
    Perigee 737.874 km 761.695 km
    Orbit Epoch 2026-10-18T01:13:56+0000 2026-10-18T13:08:50+0000

    ERS 1 & YAOGAN 17C Collision Probability (Pc) Trend

    ERS 1 & YAOGAN 17C Collision Probability (Pc) TrendNot Available

    ERS 1 & YAOGAN 17C Miss Distance (Miss Distance) Trend

    ERS 1 & YAOGAN 17C Miss Distance (Miss Distance) TrendNot Available

    ERS 1Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    YAOGAN 17CMiss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    ERS 1Collision Probability Trend

    Object 1 Probability TrendNot Available

    YAOGAN 17CCollision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with ERS 1

    No nearby objects data