Conjunction Event Detail

    ✅
    Low Risk
    Low collision probability. Continue monitoring.
    1.5131E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-27T21:46:21+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) 1.5131E-6
    Conjunction Distance (km) 2.202 km
    Relative Speed (km/s) 7.601 km/s
    Conjunction Risk Parameters R (Radial): -2.115 | I (In-track): 0.517 | C (Cross-track): -0.325
    Collision Risk Index (CRI) 0.39
    X Position (km) 1414.778 1414.956
    Position Y (km) 166.432 166.338
    Position Z (km) -7010.467 -7008.274
    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 7142.393 km
    Eccentricity (e) 0.008083 0.000273
    Inclination (i) 97.8017° 86.3994°
    RAAN 321.9941° 25.7069°
    Perigee Argument 56.9479° 131.2469°
    Mean Anomaly (M) 303.9446° 228.8965°
    Apogee 788.404 km 766.204 km
    Perigee 673.472 km 762.308 km
    Orbit Epoch 2026-10-27T00:16:42+0000 2026-10-27T04:51:22+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