Conjunction Event Detail

    ✅
    Low Risk
    Low collision probability. Continue monitoring.
    2.29684E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-27T12:34:17+0800
    View CDM
    Download CDM 1.0

    1 Object 1

    Name ANNA 1B
    AOE ID 446
    NORAD ID 446
    Object Type PAYLOAD
    Country
    US US
    ← VS →

    2 Object 2

    AOE ID 63162
    NORAD ID 63162
    Object Type PAYLOAD
    Country
    CN CN

    Conjunction Constraints

    Parameter ANNA 1B QIANFAN-76
    Time of Closest Approach 2026-10-29T11:54:19+0000
    Collision Probability (Pc) 2.29684E-6
    Conjunction Distance (km) 1.865 km
    Relative Speed (km/s) 7.834 km/s
    Conjunction Risk Parameters R (Radial): -0.03 | I (In-track): 1.572 | C (Cross-track): 1.004
    Collision Risk Index (CRI) 0.42
    X Position (km) 1599.268 1599.902
    Position Y (km) -4971.662 -4970.271
    Position Z (km) 5309.103 5310.171
    Velocity X (km/s) 5.742 -1.418
    Velocity Y (km/s) 4.069 5.021
    Velocity Z (km/s) 2.094 5.126

    Orbital Parameters 国际轨道数据源

    Parameter ANNA 1B QIANFAN-76
    Semimajor Axis (a) 7504.721 km 7446.616 km
    Eccentricity (e) 0.007030 0.001170
    Inclination (i) 50.1409° 88.9625°
    RAAN 239.1958° 287.0519°
    Perigee Argument 46.3118° 291.7815°
    Mean Anomaly (M) 349.8588° 68.2090°
    Apogee 1179.339 km 1077.194 km
    Perigee 1073.829 km 1059.764 km
    Orbit Epoch 2026-10-26T20:52:52+0000 2026-10-26T23:14:48+0000

    ANNA 1B & QIANFAN-76 Collision Probability (Pc) Trend

    ANNA 1B & QIANFAN-76 Collision Probability (Pc) TrendNot Available

    ANNA 1B & QIANFAN-76 Miss Distance (Miss Distance) Trend

    ANNA 1B & QIANFAN-76 Miss Distance (Miss Distance) TrendNot Available

    ANNA 1BMiss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    QIANFAN-76Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    ANNA 1BCollision Probability Trend

    Object 1 Probability TrendNot Available

    QIANFAN-76Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with ANNA 1B

    No nearby objects data