Conjunction Event Detail

    Low Risk
    Low collision probability. Continue monitoring.
    8.228323E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-04T11:49:02+0800
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    1 Object 1

    AOE ID 12138
    NORAD ID 12138
    Object Type PAYLOAD
    Country
    CIS CIS
    VS

    2 Object 2

    AOE ID 58836
    NORAD ID 58836
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter COSMOS 1238 STARLINK-31251
    Time of Closest Approach 2026-09-04T14:48:14+0000
    Collision Probability (Pc) 8.228323E-6
    Conjunction Distance (km) 1.253 km
    Relative Speed (km/s) 8.247 km/s
    Conjunction Risk Parameters R (Radial): 1.027 | I (In-track): 0.579 | C (Cross-track): 0.426
    Collision Risk Index (CRI) 0.53
    X Position (km) 4071.686 4072.077
    Position Y (km) -1158.937 -1158.496
    Position Z (km) -5379.455 -5380.56
    Velocity X (km/s) -5.209 0.623
    Velocity Y (km/s) 3.094 7.511
    Velocity Z (km/s) -4.953 -1.147

    Orbital Parameters 国际轨道数据源

    Parameter COSMOS 1238 STARLINK-31251
    Semimajor Axis (a) 7225.152 km 6840.854 km
    Eccentricity (e) 0.063490 0.000129
    Inclination (i) 82.9606° 53.1614°
    RAAN 155.7330° 99.9381°
    Perigee Argument 200.1631° 89.6278°
    Mean Anomaly (M) 157.3419° 270.4872°
    Apogee 1305.743 km 463.597 km
    Perigee 388.287 km 461.837 km
    Orbit Epoch 2026-09-03T19:01:43+0000 2026-09-02T21:02:05+0000

    COSMOS 1238 & STARLINK-31251 Collision Probability (Pc) Trend

    COSMOS 1238 & STARLINK-31251 Collision Probability (Pc) TrendNot Available

    COSMOS 1238 & STARLINK-31251 Miss Distance (Miss Distance) Trend

    COSMOS 1238 & STARLINK-31251 Miss Distance (Miss Distance) TrendNot Available

    COSMOS 1238Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    STARLINK-31251Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    COSMOS 1238Collision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-31251Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with COSMOS 1238

    No nearby objects data