Conjunction Event Detail

    ✅
    Low Risk
    Low collision probability. Continue monitoring.
    1.49873E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-12T05:12:58+0800
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    1 Object 1

    AOE ID 29971
    NORAD ID 29971
    Object Type DEBRIS
    Country
    CN CN
    ← VS →

    2 Object 2

    Name NOAA 21
    AOE ID 54234
    NORAD ID 54234
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter FENGYUN 1C DEB NOAA 21
    Time of Closest Approach 2026-10-12T08:04:22+0000
    Collision Probability (Pc) 1.49873E-6
    Conjunction Distance (km) 2.501 km
    Relative Speed (km/s) 11.348 km/s
    Conjunction Risk Parameters R (Radial): 0.42 | I (In-track): -1.6 | C (Cross-track): 1.876
    Collision Risk Index (CRI) 0.39
    X Position (km) -1680.357 -1680.333
    Position Y (km) -71.771 -74.237
    Position Z (km) 6998.263 6998.675
    Velocity X (km/s) -5.739 5.287
    Velocity Y (km/s) 4.55 5.065
    Velocity Z (km/s) -1.312 1.32

    Orbital Parameters 国际轨道数据源

    Parameter FENGYUN 1C DEB NOAA 21
    Semimajor Axis (a) 7206.838 km 7205.003 km
    Eccentricity (e) 0.002279 0.000115
    Inclination (i) 98.6485° 98.7142°
    RAAN 321.9069° 220.9920°
    Perigee Argument 21.1275° 186.6235°
    Mean Anomaly (M) 41.3004° 173.4926°
    Apogee 845.123 km 827.697 km
    Perigee 812.279 km 826.035 km
    Orbit Epoch 2026-10-11T01:26:05+0000 2026-10-11T02:56:30+0000

    FENGYUN 1C DEB & NOAA 21 Collision Probability (Pc) Trend

    FENGYUN 1C DEB & NOAA 21 Collision Probability (Pc) TrendNot Available

    FENGYUN 1C DEB & NOAA 21 Miss Distance (Miss Distance) Trend

    FENGYUN 1C DEB & NOAA 21 Miss Distance (Miss Distance) TrendNot Available

    FENGYUN 1C DEBMiss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    NOAA 21Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    FENGYUN 1C DEBCollision Probability Trend

    Object 1 Probability TrendNot Available

    NOAA 21Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with FENGYUN 1C DEB

    No nearby objects data