Conjunction Event Detail

    Low Risk
    Low collision probability. Continue monitoring.
    1.523987E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-16T05:42:34+0800
    View CDM
    Download CDM 1.0

    1 Object 1

    AOE ID 25320
    NORAD ID 25320
    Object Type PAYLOAD
    Country
    US US
    VS

    2 Object 2

    AOE ID 37537
    NORAD ID 37537
    Object Type DEBRIS
    Country
    CIS CIS

    Conjunction Constraints

    Parameter IRIDIUM 71 COSMOS 2251 DEB
    Time of Closest Approach 2026-09-17T02:03:08+0000
    Collision Probability (Pc) 1.523987E-6
    Conjunction Distance (km) 2.672 km
    Relative Speed (km/s) 14.07 km/s
    Conjunction Risk Parameters R (Radial): 2.559 | I (In-track): 0.271 | C (Cross-track): -0.721
    Collision Risk Index (CRI) 0.39
    X Position (km) -441.888 -441.284
    Position Y (km) -3601.478 -3602.71
    Position Z (km) 6129.959 6132.251
    Velocity X (km/s) 1.696 3.362
    Velocity Y (km/s) 6.231 -5.853
    Velocity Z (km/s) 3.776 -3.233

    Orbital Parameters 国际轨道数据源

    Parameter IRIDIUM 71 COSMOS 2251 DEB
    Semimajor Axis (a) 7131.626 km 7143.985 km
    Eccentricity (e) 0.000366 0.005163
    Inclination (i) 86.3913° 74.0107°
    RAAN 257.5953° 117.0354°
    Perigee Argument 59.1754° 193.4810°
    Mean Anomaly (M) 300.9806° 166.4968°
    Apogee 756.103 km 802.731 km
    Perigee 750.875 km 728.965 km
    Orbit Epoch 2026-09-15T09:47:38+0000 2026-09-14T08:22:59+0000

    IRIDIUM 71 & COSMOS 2251 DEB Collision Probability (Pc) Trend

    IRIDIUM 71 & COSMOS 2251 DEB Collision Probability (Pc) TrendNot Available

    IRIDIUM 71 & COSMOS 2251 DEB Miss Distance (Miss Distance) Trend

    IRIDIUM 71 & COSMOS 2251 DEB Miss Distance (Miss Distance) TrendNot Available

    IRIDIUM 71Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    COSMOS 2251 DEBMiss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    IRIDIUM 71Collision Probability Trend

    Object 1 Probability TrendNot Available

    COSMOS 2251 DEBCollision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with IRIDIUM 71

    No nearby objects data