Conjunction Event Detail

    Very Low Risk
    Very low collision probability. Continue monitoring.
    9.588143E-7
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-09-11T14:08:56+0800
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    1 Object 1

    Name ARC-1
    AOE ID 40969
    NORAD ID 40969
    Object Type PAYLOAD
    Country
    US US
    VS

    2 Object 2

    AOE ID 63668
    NORAD ID 63668
    Object Type PAYLOAD
    Country
    US US

    Conjunction Constraints

    Parameter ARC-1 STARLINK-11663
    Time of Closest Approach 2026-09-12T15:25:16+0000
    Collision Probability (Pc) 9.588143E-7
    Conjunction Distance (km) 2.686 km
    Relative Speed (km/s) 6.359 km/s
    Conjunction Risk Parameters R (Radial): -2.681 | I (In-track): 0.128 | C (Cross-track): -0.063
    Collision Risk Index (CRI) 0.35
    X Position (km) -4300.643 -4299.033
    Position Y (km) 2458.62 2457.555
    Position Z (km) -4566.305 -4564.438
    Velocity X (km/s) -5.9 -4.249
    Velocity Y (km/s) -1.772 -6.385
    Velocity Z (km/s) 4.619 0.566

    Orbital Parameters 国际轨道数据源

    Parameter ARC-1 STARLINK-11663
    Semimajor Axis (a) 6754.664 km 6734.669 km
    Eccentricity (e) 0.003477 0.000133
    Inclination (i) 64.7550° 42.9994°
    RAAN 182.4398° 251.2923°
    Perigee Argument 333.3070° 282.7829°
    Mean Anomaly (M) 26.6287° 77.2890°
    Apogee 400.011 km 357.430 km
    Perigee 353.043 km 355.634 km
    Orbit Epoch 2026-09-10T19:07:29+0000 2026-09-09T09:58:26+0000

    ARC-1 & STARLINK-11663 Collision Probability (Pc) Trend

    ARC-1 & STARLINK-11663 Collision Probability (Pc) TrendNot Available

    ARC-1 & STARLINK-11663 Miss Distance (Miss Distance) Trend

    ARC-1 & STARLINK-11663 Miss Distance (Miss Distance) TrendNot Available

    ARC-1Miss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    STARLINK-11663Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    ARC-1Collision Probability Trend

    Object 1 Probability TrendNot Available

    STARLINK-11663Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with ARC-1

    No nearby objects data