Conjunction Event Detail

    Low Risk
    Low collision probability. Continue monitoring.
    4.722758E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-05T18:40:29+0800
    View CDM
    Download CDM 1.0

    1 Object 1

    Name SJ-7
    AOE ID 28737
    NORAD ID 28737
    Object Type PAYLOAD
    Country
    CN CN
    VS

    2 Object 2

    AOE ID 53083
    NORAD ID 53083
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter SJ-7 STARLINK-4251
    Time of Closest Approach 2026-09-05T21:35:15+0000
    Collision Probability (Pc) 4.722758E-6
    Conjunction Distance (km) 1.664 km
    Relative Speed (km/s) 14.359 km/s
    Conjunction Risk Parameters R (Radial): -1.135 | I (In-track): -0.419 | C (Cross-track): -1.141
    Collision Risk Index (CRI) 0.48
    X Position (km) -350.925 -349.661
    Position Y (km) -2642.083 -2641.804
    Position Z (km) 6322.143 6321.098
    Velocity X (km/s) -1.748 -3.339
    Velocity Y (km/s) 6.887 -6.256
    Velocity Z (km/s) 2.766 -2.793

    Orbital Parameters 国际轨道数据源

    Parameter SJ-7 STARLINK-4251
    Semimajor Axis (a) 6876.303 km 6870.128 km
    Eccentricity (e) 0.001690 0.000171
    Inclination (i) 97.7248° 97.2860°
    RAAN 280.3262° 64.0799°
    Perigee Argument 112.5984° 88.9834°
    Mean Anomaly (M) 247.7041° 322.1116°
    Apogee 509.785 km 493.167 km
    Perigee 486.547 km 490.815 km
    Orbit Epoch 2026-09-05T00:47:01+0000 2026-09-05T04:00:02+0000

    SJ-7 & STARLINK-4251 Collision Probability (Pc) Trend

    SJ-7 & STARLINK-4251 Collision Probability (Pc) TrendNot Available

    SJ-7 & STARLINK-4251 Miss Distance (Miss Distance) Trend

    SJ-7 & STARLINK-4251 Miss Distance (Miss Distance) TrendNot Available

    SJ-7Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    STARLINK-4251Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    SJ-7Collision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-4251Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with SJ-7

    No nearby objects data