Conjunction Event Detail

    ✅
    Low Risk
    Low collision probability. Continue monitoring.
    1.500424E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-27T12:44:33+0800
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    1 Object 1

    AOE ID 1982
    NORAD ID 1982
    Object Type PAYLOAD
    Country
    US US
    ← VS →

    2 Object 2

    AOE ID 24870
    NORAD ID 24870
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter ESSA 1 (OT-3) IRIDIUM 17
    Time of Closest Approach 2026-10-29T11:35:24+0000
    Collision Probability (Pc) 1.500424E-6
    Conjunction Distance (km) 2.211 km
    Relative Speed (km/s) 7.601 km/s
    Conjunction Risk Parameters R (Radial): -2.137 | I (In-track): 0.482 | C (Cross-track): -0.295
    Collision Risk Index (CRI) 0.39
    X Position (km) 1414.793 1414.922
    Position Y (km) 166.421 166.323
    Position Z (km) -7010.464 -7008.259
    Velocity X (km/s) 5.875 6.611
    Velocity Y (km/s) -4.415 3.145
    Velocity Z (km/s) 1.128 1.409

    Orbital Parameters 国际轨道数据源

    Parameter ESSA 1 (OT-3) IRIDIUM 17
    Semimajor Axis (a) 7109.075 km 7142.394 km
    Eccentricity (e) 0.008084 0.000268
    Inclination (i) 97.8017° 86.3994°
    RAAN 321.9303° 25.8824°
    Perigee Argument 57.1592° 131.9607°
    Mean Anomaly (M) 303.7353° 228.1820°
    Apogee 788.406 km 766.172 km
    Perigee 673.470 km 762.342 km
    Orbit Epoch 2026-10-26T22:37:13+0000 2026-10-26T18:50:15+0000

    ESSA 1 (OT-3) & IRIDIUM 17 Collision Probability (Pc) Trend

    ESSA 1 (OT-3) & IRIDIUM 17 Collision Probability (Pc) TrendNot Available

    ESSA 1 (OT-3) & IRIDIUM 17 Miss Distance (Miss Distance) Trend

    ESSA 1 (OT-3) & IRIDIUM 17 Miss Distance (Miss Distance) TrendNot Available

    ESSA 1 (OT-3)Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    IRIDIUM 17Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    ESSA 1 (OT-3)Collision Probability Trend

    Object 1 Probability TrendNot Available

    IRIDIUM 17Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with ESSA 1 (OT-3)

    No nearby objects data