Conjunction Event Detail

    Low Risk
    Low collision probability. Continue monitoring.
    3.560402E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-06T01:19:37+0800
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    1 Object 1

    AOE ID 48755
    NORAD ID 48755
    Object Type DEBRIS
    Country
    US US
    VS

    2 Object 2

    AOE ID 57386
    NORAD ID 57386
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter NOAA 17 DEB STARLING 4
    Time of Closest Approach 2026-09-07T23:16:47+0000
    Collision Probability (Pc) 3.560402E-6
    Conjunction Distance (km) 1.28 km
    Relative Speed (km/s) 2.574 km/s
    Conjunction Risk Parameters R (Radial): -0.201 | I (In-track): 1.246 | C (Cross-track): -0.215
    Collision Risk Index (CRI) 0.46
    X Position (km) 1118.768 1118.216
    Position Y (km) 263.5 264.627
    Position Z (km) -6833.421 -6833.672
    Velocity X (km/s) 4.57 2.328
    Velocity Y (km/s) -6.016 -7.207
    Velocity Z (km/s) 0.522 0.097

    Orbital Parameters 国际轨道数据源

    Parameter NOAA 17 DEB STARLING 4
    Semimajor Axis (a) 6921.428 km 6923.513 km
    Eccentricity (e) 0.000810 0.000594
    Inclination (i) 98.6912° 99.5071°
    RAAN 303.7941° 284.6861°
    Perigee Argument 28.9824° 206.1620°
    Mean Anomaly (M) 331.1849° 153.9302°
    Apogee 548.897 km 549.491 km
    Perigee 537.685 km 541.261 km
    Orbit Epoch 2026-09-04T09:39:15+0000 2026-09-05T06:20:29+0000

    NOAA 17 DEB & STARLING 4 Collision Probability (Pc) Trend

    NOAA 17 DEB & STARLING 4 Collision Probability (Pc) TrendNot Available

    NOAA 17 DEB & STARLING 4 Miss Distance (Miss Distance) Trend

    NOAA 17 DEB & STARLING 4 Miss Distance (Miss Distance) TrendNot Available

    NOAA 17 DEBMiss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    STARLING 4Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    NOAA 17 DEBCollision Probability Trend

    Object 1 Probability TrendNot Available

    STARLING 4Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with NOAA 17 DEB

    No nearby objects data