Conjunction Event Detail

    Low Risk
    Low collision probability. Continue monitoring.
    1.688924E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-08-31T09:36:22+0800
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    1 Object 1

    Name SEMI-1L
    AOE ID 66294
    NORAD ID 66294
    Object Type PAYLOAD
    Country
    TR TR
    VS

    2 Object 2

    AOE ID 66678
    NORAD ID 66678
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter SEMI-1L OTTER SDM
    Time of Closest Approach 2026-08-31T02:48:13+0000
    Collision Probability (Pc) 1.688924E-6
    Conjunction Distance (km) 2.455 km
    Relative Speed (km/s) 13.121 km/s
    Conjunction Risk Parameters R (Radial): 2.448 | I (In-track): -0.098 | C (Cross-track): 0.168
    Collision Risk Index (CRI) 0.4
    X Position (km) -4026.695 -4027.972
    Position Y (km) 3132.044 3133.224
    Position Z (km) 4605.436 4607.17
    Velocity X (km/s) -3.117 -3.162
    Velocity Y (km/s) -6.706 4.138
    Velocity Z (km/s) 1.828 -5.559

    Orbital Parameters 国际轨道数据源

    Parameter SEMI-1L OTTER SDM
    Semimajor Axis (a) 6878.889 km 6882.340 km
    Eccentricity (e) 0.000245 0.000730
    Inclination (i) 45.4057° 97.4157°
    RAAN 82.0521° 314.4379°
    Perigee Argument 165.1119° 99.7529°
    Mean Anomaly (M) 194.9840° 260.4531°
    Apogee 502.436 km 509.226 km
    Perigee 499.068 km 499.180 km
    Orbit Epoch 2026-08-30T13:53:30+0000 2026-08-30T04:05:27+0000

    SEMI-1L & OTTER SDM Collision Probability (Pc) Trend

    SEMI-1L & OTTER SDM Collision Probability (Pc) TrendNot Available

    SEMI-1L & OTTER SDM Miss Distance (Miss Distance) Trend

    SEMI-1L & OTTER SDM Miss Distance (Miss Distance) TrendNot Available

    SEMI-1LMiss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    OTTER SDMMiss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    SEMI-1LCollision Probability Trend

    Object 1 Probability TrendNot Available

    OTTER SDMCollision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with SEMI-1L

    No nearby objects data