Conjunction Event Detail

    Low Risk
    Low collision probability. Continue monitoring.
    8.817002E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-05T22:31:40+0800
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    1 Object 1

    AOE ID 66721
    NORAD ID 66721
    Object Type PAYLOAD
    Country
    US US
    VS

    2 Object 2

    Name FEMTO-1
    AOE ID 68419
    NORAD ID 68419
    Object Type PAYLOAD
    Country
    BG BG

    Conjunction Constraints

    Parameter FLOCK 4H 18 FEMTO-1
    Time of Closest Approach 2026-09-07T22:50:40+0000
    Collision Probability (Pc) 8.817002E-6
    Conjunction Distance (km) 1.339 km
    Relative Speed (km/s) 12.668 km/s
    Conjunction Risk Parameters R (Radial): 1.277 | I (In-track): -0.224 | C (Cross-track): -0.335
    Collision Risk Index (CRI) 0.54
    X Position (km) 1614.494 1614.821
    Position Y (km) -124.762 -124.383
    Position Z (km) -6700.17 -6701.411
    Velocity X (km/s) 5.826 -6.453
    Velocity Y (km/s) -4.634 -3.715
    Velocity Z (km/s) 1.491 -1.485

    Orbital Parameters 国际轨道数据源

    Parameter FLOCK 4H 18 FEMTO-1
    Semimajor Axis (a) 6882.012 km 6886.004 km
    Eccentricity (e) 0.000552 0.000237
    Inclination (i) 97.4114° 97.4618°
    RAAN 320.2244° 204.8760°
    Perigee Argument 104.7308° 40.6479°
    Mean Anomaly (M) 255.4539° 319.4932°
    Apogee 507.671 km 509.496 km
    Perigee 500.079 km 506.238 km
    Orbit Epoch 2026-09-05T03:16:53+0000 2026-09-04T08:21:17+0000

    FLOCK 4H 18 & FEMTO-1 Collision Probability (Pc) Trend

    FLOCK 4H 18 & FEMTO-1 Collision Probability (Pc) TrendNot Available

    FLOCK 4H 18 & FEMTO-1 Miss Distance (Miss Distance) Trend

    FLOCK 4H 18 & FEMTO-1 Miss Distance (Miss Distance) TrendNot Available

    FLOCK 4H 18Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    FEMTO-1Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    FLOCK 4H 18Collision Probability Trend

    Object 1 Probability TrendNot Available

    FEMTO-1Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with FLOCK 4H 18

    No nearby objects data