Conjunction Event Detail

    ✅
    Low Risk
    Low collision probability. Continue monitoring.
    9.542521E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-22T03:34:44+0800
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    1 Object 1

    Name NOAA 18
    AOE ID 28654
    NORAD ID 28654
    Object Type PAYLOAD
    Country
    US US
    ← VS →

    2 Object 2

    AOE ID 63920
    NORAD ID 63920
    Object Type PAYLOAD
    Country
    CN CN

    Conjunction Constraints

    Parameter NOAA 18 YAOGAN-40 02C
    Time of Closest Approach 2026-10-22T06:50:26+0000
    Collision Probability (Pc) 9.542521E-6
    Conjunction Distance (km) 1.309 km
    Relative Speed (km/s) 12.669 km/s
    Conjunction Risk Parameters R (Radial): 0.132 | I (In-track): -0.68 | C (Cross-track): 1.11
    Collision Risk Index (CRI) 0.55
    X Position (km) -255.542 -255.962
    Position Y (km) 1078.489 1077.286
    Position Z (km) -7152.582 -7152.882
    Velocity X (km/s) 7.216 -4.801
    Velocity Y (km/s) 1.676 5.553
    Velocity Z (km/s) -0.014 1.009

    Orbital Parameters 国际轨道数据源

    Parameter NOAA 18 YAOGAN-40 02C
    Semimajor Axis (a) 7224.707 km 7229.080 km
    Eccentricity (e) 0.001485 0.000222
    Inclination (i) 98.8028° 85.9921°
    RAAN 12.1015° 130.7331°
    Perigee Argument 149.2069° 86.6766°
    Mean Anomaly (M) 210.9977° 273.4672°
    Apogee 857.296 km 852.551 km
    Perigee 835.844 km 849.335 km
    Orbit Epoch 2026-10-21T07:29:14+0000 2026-10-21T07:25:35+0000

    NOAA 18 & YAOGAN-40 02C Collision Probability (Pc) Trend

    NOAA 18 & YAOGAN-40 02C Collision Probability (Pc) TrendNot Available

    NOAA 18 & YAOGAN-40 02C Miss Distance (Miss Distance) Trend

    NOAA 18 & YAOGAN-40 02C Miss Distance (Miss Distance) TrendNot Available

    NOAA 18Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    YAOGAN-40 02CMiss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    NOAA 18Collision Probability Trend

    Object 1 Probability TrendNot Available

    YAOGAN-40 02CCollision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with NOAA 18

    No nearby objects data