Conjunction Event Detail

    ✅
    Low Risk
    Low collision probability. Continue monitoring.
    3.16177E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-28T02:16:02+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 55634
    NORAD ID 55634
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter UPPER FREE FLYER STARLINK-5500
    Time of Closest Approach 2026-09-28T07:14:17+0000
    Collision Probability (Pc) 3.16177E-6
    Conjunction Distance (km) 1.813 km
    Relative Speed (km/s) 11.444 km/s
    Conjunction Risk Parameters R (Radial): 1.551 | I (In-track): -0.613 | C (Cross-track): -0.708
    Collision Risk Index (CRI) 0.45
    X Position (km) -2254.629 -2254.251
    Position Y (km) 917.582 917.897
    Position Z (km) 6465.32 6467.065
    Velocity X (km/s) -5.073 -4.34
    Velocity Y (km/s) 5.072 -6.197
    Velocity Z (km/s) -2.48 -0.631

    Orbital Parameters 国际轨道数据源

    Parameter UPPER FREE FLYER STARLINK-5500
    Semimajor Axis (a) 6907.892 km 6914.710 km
    Eccentricity (e) 0.001152 0.000369
    Inclination (i) 97.4249° 69.9994°
    RAAN 316.4116° 56.1934°
    Perigee Argument 318.3461° 290.7243°
    Mean Anomaly (M) 41.6891° 69.3527°
    Apogee 537.713 km 539.126 km
    Perigee 521.797 km 534.020 km
    Orbit Epoch 2026-09-27T02:10:09+0000 2026-09-27T03:47:19+0000

    UPPER FREE FLYER & STARLINK-5500 Collision Probability (Pc) Trend

    UPPER FREE FLYER & STARLINK-5500 Collision Probability (Pc) TrendNot Available

    UPPER FREE FLYER & STARLINK-5500 Miss Distance (Miss Distance) Trend

    UPPER FREE FLYER & STARLINK-5500 Miss Distance (Miss Distance) TrendNot Available

    UPPER FREE FLYERMiss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    STARLINK-5500Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    UPPER FREE FLYERCollision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-5500Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with UPPER FREE FLYER

    No nearby objects data