Conjunction Event Detail

    ✅
    Very Low Risk
    Very low collision probability. Continue monitoring.
    9.504056E-7
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-20T03:47:12+0800
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    1 Object 1

    AOE ID 53784
    NORAD ID 53784
    Object Type PAYLOAD
    Country
    US US
    ← VS →

    2 Object 2

    AOE ID 55753
    NORAD ID 55753
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter STARLINK-4687 STARLINK-5617
    Time of Closest Approach 2026-10-21T01:19:48+0000
    Collision Probability (Pc) 9.504056E-7
    Conjunction Distance (km) 2.981 km
    Relative Speed (km/s) 7.958 km/s
    Conjunction Risk Parameters R (Radial): -2.707 | I (In-track): 1.067 | C (Cross-track): 0.642
    Collision Risk Index (CRI) 0.35
    X Position (km) 1903.109 1901.16
    Position Y (km) 3673.055 3671.771
    Position Z (km) 5448.581 5446.727
    Velocity X (km/s) -6.37 -6.142
    Velocity Y (km/s) 4.167 -2.469
    Velocity Z (km/s) -0.583 3.801

    Orbital Parameters 国际轨道数据源

    Parameter STARLINK-4687 STARLINK-5617
    Semimajor Axis (a) 6848.867 km 6854.372 km
    Eccentricity (e) 0.000102 0.000321
    Inclination (i) 53.1601° 70.0008°
    RAAN 332.4129° 38.7458°
    Perigee Argument 89.0409° 264.9489°
    Mean Anomaly (M) 271.0709° 279.2249°
    Apogee 471.428 km 478.435 km
    Perigee 470.032 km 474.035 km
    Orbit Epoch 2026-10-19T03:30:04+0000 2026-10-19T06:00:01+0000

    STARLINK-4687 & STARLINK-5617 Collision Probability (Pc) Trend

    STARLINK-4687 & STARLINK-5617 Collision Probability (Pc) TrendNot Available

    STARLINK-4687 & STARLINK-5617 Miss Distance (Miss Distance) Trend

    STARLINK-4687 & STARLINK-5617 Miss Distance (Miss Distance) TrendNot Available

    STARLINK-4687Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    STARLINK-5617Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    STARLINK-4687Collision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-5617Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with STARLINK-4687

    No nearby objects data