Conjunction Event Detail

    ✅
    Low Risk
    Low collision probability. Continue monitoring.
    1.622949E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-21T23:31:37+0800
    View CDM
    Download CDM 1.0

    1 Object 1

    AOE ID 3510
    NORAD ID 3510
    Object Type PAYLOAD
    Country
    US US
    ← VS →

    2 Object 2

    AOE ID 43255
    NORAD ID 43255
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter OPS 4078 (DMSP 4B F2) IRIDIUM 148
    Time of Closest Approach 2026-10-21T21:08:20+0000
    Collision Probability (Pc) 1.622949E-6
    Conjunction Distance (km) 2.624 km
    Relative Speed (km/s) 14.912 km/s
    Conjunction Risk Parameters R (Radial): 0.861 | I (In-track): -0.126 | C (Cross-track): -2.475
    Collision Risk Index (CRI) 0.39
    X Position (km) 3385.036 3383.389
    Position Y (km) 5634.71 5636.751
    Position Z (km) -2841.872 -2841.959
    Velocity X (km/s) 2.548 -1.954
    Velocity Y (km/s) 1.883 -2.264
    Velocity Z (km/s) 6.764 -6.833

    Orbital Parameters 国际轨道数据源

    Parameter OPS 4078 (DMSP 4B F2) IRIDIUM 148
    Semimajor Axis (a) 7175.620 km 7155.803 km
    Eccentricity (e) 0.002893 0.000227
    Inclination (i) 98.5882° 86.3968°
    RAAN 54.7119° 237.7151°
    Perigee Argument 319.6171° 83.5704°
    Mean Anomaly (M) 40.2862° 276.5750°
    Apogee 818.246 km 779.292 km
    Perigee 776.720 km 776.040 km
    Orbit Epoch 2026-10-21T07:47:56+0000 2026-10-21T06:47:55+0000

    OPS 4078 (DMSP 4B F2) & IRIDIUM 148 Collision Probability (Pc) Trend

    OPS 4078 (DMSP 4B F2) & IRIDIUM 148 Collision Probability (Pc) TrendNot Available

    OPS 4078 (DMSP 4B F2) & IRIDIUM 148 Miss Distance (Miss Distance) Trend

    OPS 4078 (DMSP 4B F2) & IRIDIUM 148 Miss Distance (Miss Distance) TrendNot Available

    OPS 4078 (DMSP 4B F2)Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    IRIDIUM 148Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    OPS 4078 (DMSP 4B F2)Collision Probability Trend

    Object 1 Probability TrendNot Available

    IRIDIUM 148Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with OPS 4078 (DMSP 4B F2)

    No nearby objects data