Conjunction Event Detail

    Low Risk
    Low collision probability. Continue monitoring.
    7.985945E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-04T14:38:20+0800
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    1 Object 1

    AOE ID 39211
    NORAD ID 39211
    Object Type ROCKET BODY
    Country
    CN CN
    VS

    2 Object 2

    AOE ID 63961
    NORAD ID 63961
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter CZ-4C R/B STARLINK-34121
    Time of Closest Approach 2026-09-04T22:02:27+0000
    Collision Probability (Pc) 7.985945E-6
    Conjunction Distance (km) 1.308 km
    Relative Speed (km/s) 9.767 km/s
    Conjunction Risk Parameters R (Radial): -0.121 | I (In-track): 1.001 | C (Cross-track): 0.833
    Collision Risk Index (CRI) 0.53
    X Position (km) 5333.488 5334.045
    Position Y (km) 452.484 453.176
    Position Z (km) 4285.498 4284.538
    Velocity X (km/s) 4.804 1.058
    Velocity Y (km/s) -0.946 7.261
    Velocity Z (km/s) -5.82 -2.079

    Orbital Parameters 国际轨道数据源

    Parameter CZ-4C R/B STARLINK-34121
    Semimajor Axis (a) 6824.947 km 6861.183 km
    Eccentricity (e) 0.006228 0.000258
    Inclination (i) 97.9587° 43.0017°
    RAAN 177.1898° 253.0246°
    Perigee Argument 359.6441° 288.7453°
    Mean Anomaly (M) 0.4748° 71.3119°
    Apogee 489.316 km 484.817 km
    Perigee 404.304 km 481.275 km
    Orbit Epoch 2026-09-03T18:55:08+0000 2026-09-03T07:53:03+0000

    CZ-4C R/B & STARLINK-34121 Collision Probability (Pc) Trend

    CZ-4C R/B & STARLINK-34121 Collision Probability (Pc) TrendNot Available

    CZ-4C R/B & STARLINK-34121 Miss Distance (Miss Distance) Trend

    CZ-4C R/B & STARLINK-34121 Miss Distance (Miss Distance) TrendNot Available

    CZ-4C R/BMiss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    STARLINK-34121Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    CZ-4C R/BCollision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-34121Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with CZ-4C R/B

    No nearby objects data