Conjunction Event Detail

    Low Risk
    Low collision probability. Continue monitoring.
    5.811437E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-11T22:02:25+0800
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    1 Object 1

    AOE ID 25977
    NORAD ID 25977
    Object Type PAYLOAD
    Country
    FR FR
    VS

    2 Object 2

    Name LEMUR 1
    AOE ID 40044
    NORAD ID 40044
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter HELIOS 1B LEMUR 1
    Time of Closest Approach 2026-09-11T16:03:35+0000
    Collision Probability (Pc) 5.811437E-6
    Conjunction Distance (km) 1.524 km
    Relative Speed (km/s) 12.946 km/s
    Conjunction Risk Parameters R (Radial): 1.439 | I (In-track): 0.263 | C (Cross-track): -0.428
    Collision Risk Index (CRI) 0.5
    X Position (km) 1823.724 1824.212
    Position Y (km) 427.992 427.59
    Position Z (km) 6717.105 6718.492
    Velocity X (km/s) 6.932 -5.257
    Velocity Y (km/s) -2.474 -5.158
    Velocity Z (km/s) -1.721 1.715

    Orbital Parameters 国际轨道数据源

    Parameter HELIOS 1B LEMUR 1
    Semimajor Axis (a) 6981.720 km 6990.131 km
    Eccentricity (e) 0.000179 0.004858
    Inclination (i) 98.1516° 97.7996°
    RAAN 161.9130° 41.3629°
    Perigee Argument 122.2534° 157.1071°
    Mean Anomaly (M) 237.8855° 203.2325°
    Apogee 604.832 km 645.951 km
    Perigee 602.334 km 578.037 km
    Orbit Epoch 2026-09-11T07:31:45+0000 2026-09-10T09:00:00+0000

    HELIOS 1B & LEMUR 1 Collision Probability (Pc) Trend

    HELIOS 1B & LEMUR 1 Collision Probability (Pc) TrendNot Available

    HELIOS 1B & LEMUR 1 Miss Distance (Miss Distance) Trend

    HELIOS 1B & LEMUR 1 Miss Distance (Miss Distance) TrendNot Available

    HELIOS 1BMiss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    LEMUR 1Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    HELIOS 1BCollision Probability Trend

    Object 1 Probability TrendNot Available

    LEMUR 1Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with HELIOS 1B

    No nearby objects data