Conjunction Event Detail

    Low Risk
    Low collision probability. Continue monitoring.
    1.511338E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-05T01:35:52+0800
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    1 Object 1

    AOE ID 41456
    NORAD ID 41456
    Object Type PAYLOAD
    Country
    ESA ESA
    VS

    2 Object 2

    AOE ID 55764
    NORAD ID 55764
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter SENTINEL 1B STARLINK-5499
    Time of Closest Approach 2026-09-07T06:35:54+0000
    Collision Probability (Pc) 1.511338E-6
    Conjunction Distance (km) 2.756 km
    Relative Speed (km/s) 15.024 km/s
    Conjunction Risk Parameters R (Radial): -1.381 | I (In-track): 0.288 | C (Cross-track): -2.366
    Collision Risk Index (CRI) 0.39
    X Position (km) 4536.64 4537.496
    Position Y (km) -3958.096 -3955.806
    Position Z (km) -3483.617 -3482.346
    Velocity X (km/s) 2.012 -0.658
    Velocity Y (km/s) -3.387 4.541
    Velocity Z (km/s) 6.459 -6.02

    Orbital Parameters 国际轨道数据源

    Parameter SENTINEL 1B STARLINK-5499
    Semimajor Axis (a) 6946.738 km 6950.203 km
    Eccentricity (e) 0.001194 0.000270
    Inclination (i) 98.0894° 69.9998°
    RAAN 311.0639° 134.7614°
    Perigee Argument 227.7416° 268.6379°
    Mean Anomaly (M) 132.2795° 91.4470°
    Apogee 576.894 km 573.942 km
    Perigee 560.308 km 570.190 km
    Orbit Epoch 2026-09-04T06:39:47+0000 2026-09-04T02:20:57+0000

    SENTINEL 1B & STARLINK-5499 Collision Probability (Pc) Trend

    SENTINEL 1B & STARLINK-5499 Collision Probability (Pc) TrendNot Available

    SENTINEL 1B & STARLINK-5499 Miss Distance (Miss Distance) Trend

    SENTINEL 1B & STARLINK-5499 Miss Distance (Miss Distance) TrendNot Available

    SENTINEL 1BMiss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    STARLINK-5499Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    SENTINEL 1BCollision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-5499Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with SENTINEL 1B

    No nearby objects data