Conjunction Event Detail

    Low Risk
    Low collision probability. Continue monitoring.
    1.00412E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-16T05:06:10+0800
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    1 Object 1

    AOE ID 20438
    NORAD ID 20438
    Object Type PAYLOAD
    Country
    GB GB
    VS

    2 Object 2

    AOE ID 43576
    NORAD ID 43576
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter OSCAR 15 (UOSAT 4) IRIDIUM 156
    Time of Closest Approach 2026-09-18T05:00:08+0000
    Collision Probability (Pc) 1.00412E-6
    Conjunction Distance (km) 2.773 km
    Relative Speed (km/s) 7.473 km/s
    Conjunction Risk Parameters R (Radial): -2.223 | I (In-track): 1.434 | C (Cross-track): 0.83
    Collision Risk Index (CRI) 0.35
    X Position (km) -1582.014 -1583.103
    Position Y (km) -48.553 -48.199
    Position Z (km) 6972.047 6969.522
    Velocity X (km/s) -5.432 -6.915
    Velocity Y (km/s) 4.985 -2.328
    Velocity Z (km/s) -1.193 -1.583

    Orbital Parameters 国际轨道数据源

    Parameter OSCAR 15 (UOSAT 4) IRIDIUM 156
    Semimajor Axis (a) 7164.075 km 7155.807 km
    Eccentricity (e) 0.001089 0.000215
    Inclination (i) 98.7745° 86.4003°
    RAAN 316.0543° 19.2029°
    Perigee Argument 87.6915° 90.0809°
    Mean Anomaly (M) 335.5640° 270.0633°
    Apogee 793.742 km 779.207 km
    Perigee 778.134 km 776.133 km
    Orbit Epoch 2026-09-15T09:44:41+0000 2026-09-14T21:49:42+0000

    OSCAR 15 (UOSAT 4) & IRIDIUM 156 Collision Probability (Pc) Trend

    OSCAR 15 (UOSAT 4) & IRIDIUM 156 Collision Probability (Pc) TrendNot Available

    OSCAR 15 (UOSAT 4) & IRIDIUM 156 Miss Distance (Miss Distance) Trend

    OSCAR 15 (UOSAT 4) & IRIDIUM 156 Miss Distance (Miss Distance) TrendNot Available

    OSCAR 15 (UOSAT 4)Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    IRIDIUM 156Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    OSCAR 15 (UOSAT 4)Collision Probability Trend

    Object 1 Probability TrendNot Available

    IRIDIUM 156Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with OSCAR 15 (UOSAT 4)

    No nearby objects data