Conjunction Event Detail

    Medium Risk
    Monitor closely. Maneuver recommended for primary asset.
    4.397851E-5
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-09T17:07:06+0800
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    1 Object 1

    AOE ID 51789
    NORAD ID 51789
    Object Type PAYLOAD
    Country
    US US
    VS

    2 Object 2

    AOE ID 58662
    NORAD ID 58662
    Object Type PAYLOAD
    Country
    CN CN

    Conjunction Constraints

    Parameter STARLINK-3639 TIANMU-1 21
    Time of Closest Approach 2026-09-09T11:15:47+0000
    Collision Probability (Pc) 4.397851E-5
    Conjunction Distance (km) 0.857 km
    Relative Speed (km/s) 14.052 km/s
    Conjunction Risk Parameters R (Radial): 0.764 | I (In-track): -0.162 | C (Cross-track): -0.353
    Collision Risk Index (CRI) 0.68
    X Position (km) -4925.726 -4924.991
    Position Y (km) -508.86 -509.104
    Position Z (km) -4728.614 -4728.248
    Velocity X (km/s) -2.276 5.01
    Velocity Y (km/s) -6.592 1.893
    Velocity Z (km/s) 3.083 -5.423

    Orbital Parameters 国际轨道数据源

    Parameter STARLINK-3639 TIANMU-1 21
    Semimajor Axis (a) 6840.900 km 6834.763 km
    Eccentricity (e) 0.000256 0.000733
    Inclination (i) 53.1584° 97.4575°
    RAAN 235.8324° 12.5187°
    Perigee Argument 91.3310° 28.2527°
    Mean Anomaly (M) 268.7986° 331.9113°
    Apogee 464.515 km 461.634 km
    Perigee 461.011 km 451.618 km
    Orbit Epoch 2026-09-08T13:38:13+0000 2026-09-08T21:47:12+0000

    STARLINK-3639 & TIANMU-1 21 Collision Probability (Pc) Trend

    STARLINK-3639 & TIANMU-1 21 Collision Probability (Pc) TrendNot Available

    STARLINK-3639 & TIANMU-1 21 Miss Distance (Miss Distance) Trend

    STARLINK-3639 & TIANMU-1 21 Miss Distance (Miss Distance) TrendNot Available

    STARLINK-3639Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    TIANMU-1 21Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    STARLINK-3639Collision Probability Trend

    Object 1 Probability TrendNot Available

    TIANMU-1 21Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with STARLINK-3639

    No nearby objects data