Conjunction Event Detail

    Low Risk
    Low collision probability. Continue monitoring.
    2.398742E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-16T05:46:25+0800
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    1 Object 1

    AOE ID 15077
    NORAD ID 15077
    Object Type PAYLOAD
    Country
    CIS CIS
    VS

    2 Object 2

    AOE ID 69850
    NORAD ID 69850
    Object Type PAYLOAD
    Country
    CN CN

    Conjunction Constraints

    Parameter COSMOS 1577 QIANFAN-221
    Time of Closest Approach 2026-09-16T10:14:48+0000
    Collision Probability (Pc) 2.398742E-6
    Conjunction Distance (km) 1.943 km
    Relative Speed (km/s) 9.96 km/s
    Conjunction Risk Parameters R (Radial): -0.178 | I (In-track): -1.433 | C (Cross-track): 1.3
    Collision Risk Index (CRI) 0.43
    X Position (km) -625.34 -625.553
    Position Y (km) -646.47 -644.539
    Position Z (km) 7267.755 7267.728
    Velocity X (km/s) 5.557 -4.304
    Velocity Y (km/s) -4.87 -5.931
    Velocity Z (km/s) 0.04 -0.873

    Orbital Parameters 国际轨道数据源

    Parameter COSMOS 1577 QIANFAN-221
    Semimajor Axis (a) 7357.368 km 7338.694 km
    Eccentricity (e) 0.003700 0.003137
    Inclination (i) 82.9581° 89.0081°
    RAAN 139.4120° 54.0160°
    Perigee Argument 103.2319° 30.8294°
    Mean Anomaly (M) 270.8392° 329.4708°
    Apogee 1006.452 km 983.580 km
    Perigee 952.010 km 937.534 km
    Orbit Epoch 2026-09-15T14:40:43+0000 2026-09-15T11:10:27+0000

    COSMOS 1577 & QIANFAN-221 Collision Probability (Pc) Trend

    COSMOS 1577 & QIANFAN-221 Collision Probability (Pc) TrendNot Available

    COSMOS 1577 & QIANFAN-221 Miss Distance (Miss Distance) Trend

    COSMOS 1577 & QIANFAN-221 Miss Distance (Miss Distance) TrendNot Available

    COSMOS 1577Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    QIANFAN-221Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    COSMOS 1577Collision Probability Trend

    Object 1 Probability TrendNot Available

    QIANFAN-221Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with COSMOS 1577

    No nearby objects data