Conjunction Event Detail

    ⚠
    Medium Risk
    Monitor closely. Maneuver recommended for primary asset.
    9.238149E-5
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-18T19:24:26+0800
    View CDM
    Download CDM 1.0

    1 Object 1

    AOE ID 47399
    NORAD ID 47399
    Object Type PAYLOAD
    Country
    US US
    ← VS →

    2 Object 2

    AOE ID 48299
    NORAD ID 48299
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter STARLINK-2121 STARLINK-2557
    Time of Closest Approach 2026-10-20T17:27:15+0000
    Collision Probability (Pc) 9.238149E-5
    Conjunction Distance (km) 0.505 km
    Relative Speed (km/s) 4.044 km/s
    Conjunction Risk Parameters R (Radial): -0.208 | I (In-track): -0.443 | C (Cross-track): -0.119
    Collision Risk Index (CRI) 0.74
    X Position (km) -4254.306 -4254.164
    Position Y (km) 99.18 99.637
    Position Z (km) 5356.624 5356.462
    Velocity X (km/s) -1.755 1.414
    Velocity Y (km/s) -7.323 -7.396
    Velocity Z (km/s) -1.255 1.255

    Orbital Parameters 国际轨道数据源

    Parameter STARLINK-2121 STARLINK-2557
    Semimajor Axis (a) 6848.740 km 6847.839 km
    Eccentricity (e) 0.000074 0.000310
    Inclination (i) 53.1598° 53.1622°
    RAAN 82.8070° 119.9076°
    Perigee Argument 74.1381° 182.7529°
    Mean Anomaly (M) 285.9702° 177.3456°
    Apogee 471.110 km 471.824 km
    Perigee 470.096 km 467.580 km
    Orbit Epoch 2026-10-17T20:06:37+0000 2026-10-18T04:03:33+0000

    STARLINK-2121 & STARLINK-2557 Collision Probability (Pc) Trend

    STARLINK-2121 & STARLINK-2557 Collision Probability (Pc) TrendNot Available

    STARLINK-2121 & STARLINK-2557 Miss Distance (Miss Distance) Trend

    STARLINK-2121 & STARLINK-2557 Miss Distance (Miss Distance) TrendNot Available

    STARLINK-2121Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    STARLINK-2557Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    STARLINK-2121Collision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-2557Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with STARLINK-2121

    No nearby objects data