Conjunction Event Detail

    Low Risk
    Low collision probability. Continue monitoring.
    1.046644E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-13T16:28:24+0800
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    1 Object 1

    AOE ID 53400
    NORAD ID 53400
    Object Type PAYLOAD
    Country
    US US
    VS

    2 Object 2

    AOE ID 60288
    NORAD ID 60288
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter STARLINK-4520 STARLINK-31997
    Time of Closest Approach 2026-09-15T01:36:34+0000
    Collision Probability (Pc) 1.046644E-6
    Conjunction Distance (km) 2.924 km
    Relative Speed (km/s) 9.084 km/s
    Conjunction Risk Parameters R (Radial): 2.838 | I (In-track): 0.571 | C (Cross-track): -0.416
    Collision Risk Index (CRI) 0.35
    X Position (km) 4449.187 4450.689
    Position Y (km) 2482.914 2484.561
    Position Z (km) 4551.164 4553.058
    Velocity X (km/s) -5.641 -0.348
    Velocity Y (km/s) 3.888 6.84
    Velocity Z (km/s) 3.384 -3.383

    Orbital Parameters 国际轨道数据源

    Parameter STARLINK-4520 STARLINK-31997
    Semimajor Axis (a) 6837.884 km 6840.818 km
    Eccentricity (e) 0.000110 0.000116
    Inclination (i) 53.1610° 53.1590°
    RAAN 358.1457° 264.1133°
    Perigee Argument 86.4166° 81.8867°
    Mean Anomaly (M) 273.6963° 278.2267°
    Apogee 460.498 km 463.472 km
    Perigee 458.996 km 461.890 km
    Orbit Epoch 2026-09-12T17:07:29+0000 2026-09-12T07:25:03+0000

    STARLINK-4520 & STARLINK-31997 Collision Probability (Pc) Trend

    STARLINK-4520 & STARLINK-31997 Collision Probability (Pc) TrendNot Available

    STARLINK-4520 & STARLINK-31997 Miss Distance (Miss Distance) Trend

    STARLINK-4520 & STARLINK-31997 Miss Distance (Miss Distance) TrendNot Available

    STARLINK-4520Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    STARLINK-31997Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    STARLINK-4520Collision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-31997Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with STARLINK-4520

    No nearby objects data