Conjunction Event Detail

    ✅
    Very Low Risk
    Very low collision probability. Continue monitoring.
    9.100456E-7
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-22T05:43:15+0800
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    1 Object 1

    AOE ID 43763
    NORAD ID 43763
    Object Type PAYLOAD
    Country
    US US
    ← VS →

    2 Object 2

    AOE ID 44424
    NORAD ID 44424
    Object Type PAYLOAD
    Country
    CIS CIS

    Conjunction Constraints

    Parameter UPPER FREE FLYER COSMOS 2538
    Time of Closest Approach 2026-09-23T02:28:09+0000
    Collision Probability (Pc) 9.100456E-7
    Conjunction Distance (km) 2.43 km
    Relative Speed (km/s) 4.352 km/s
    Conjunction Risk Parameters R (Radial): 0.228 | I (In-track): -2.315 | C (Cross-track): 0.699
    Collision Risk Index (CRI) 0.34
    X Position (km) 453.243 451.174
    Position Y (km) 827.159 828.414
    Position Z (km) -6847.358 -6847.574
    Velocity X (km/s) 5.154 7.336
    Velocity Y (km/s) -5.556 -1.839
    Velocity Z (km/s) -0.322 0.276

    Orbital Parameters 国际轨道数据源

    Parameter UPPER FREE FLYER COSMOS 2538
    Semimajor Axis (a) 6907.988 km 6879.095 km
    Eccentricity (e) 0.001192 0.004251
    Inclination (i) 97.4266° 97.5820°
    RAAN 310.5559° 344.6956°
    Perigee Argument 340.8512° 69.3047°
    Mean Anomaly (M) 19.2269° 291.2737°
    Apogee 538.089 km 530.200 km
    Perigee 521.613 km 471.716 km
    Orbit Epoch 2026-09-21T01:38:33+0000 2026-09-21T14:33:24+0000

    UPPER FREE FLYER & COSMOS 2538 Collision Probability (Pc) Trend

    UPPER FREE FLYER & COSMOS 2538 Collision Probability (Pc) TrendNot Available

    UPPER FREE FLYER & COSMOS 2538 Miss Distance (Miss Distance) Trend

    UPPER FREE FLYER & COSMOS 2538 Miss Distance (Miss Distance) TrendNot Available

    UPPER FREE FLYERMiss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    COSMOS 2538Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    UPPER FREE FLYERCollision Probability Trend

    Object 1 Probability TrendNot Available

    COSMOS 2538Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with UPPER FREE FLYER

    No nearby objects data