Conjunction Event Detail

    ✅
    Low Risk
    Low collision probability. Continue monitoring.
    2.381036E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-19T19:17:30+0800
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    1 Object 1

    AOE ID 14402
    NORAD ID 14402
    Object Type ROCKET BODY
    Country
    CIS CIS
    ← VS →

    2 Object 2

    AOE ID 37931
    NORAD ID 37931
    Object Type PAYLOAD
    Country
    CN CN

    Conjunction Constraints

    Parameter SL-8 R/B SHIYAN 4 (SY-4)
    Time of Closest Approach 2026-10-21T05:35:44+0000
    Collision Probability (Pc) 2.381036E-6
    Conjunction Distance (km) 2.147 km
    Relative Speed (km/s) 14.559 km/s
    Conjunction Risk Parameters R (Radial): -1.767 | I (In-track): 0.264 | C (Cross-track): -1.188
    Collision Risk Index (CRI) 0.43
    X Position (km) -2323.199 -2323.649
    Position Y (km) 972.994 972.154
    Position Z (km) 6687.03 6685.107
    Velocity X (km/s) 1.785 -4.592
    Velocity Y (km/s) -7.062 5.396
    Velocity Z (km/s) 1.625 -2.384

    Orbital Parameters 国际轨道数据源

    Parameter SL-8 R/B SHIYAN 4 (SY-4)
    Semimajor Axis (a) 7145.090 km 7165.979 km
    Eccentricity (e) 0.002665 0.002361
    Inclination (i) 74.0423° 98.6912°
    RAAN 112.0913° 311.1598°
    Perigee Argument 195.4014° 140.2567°
    Mean Anomaly (M) 164.6332° 238.6856°
    Apogee 785.996 km 804.762 km
    Perigee 747.910 km 770.922 km
    Orbit Epoch 2026-10-18T22:07:06+0000 2026-10-19T01:09:40+0000

    SL-8 R/B & SHIYAN 4 (SY-4) Collision Probability (Pc) Trend

    SL-8 R/B & SHIYAN 4 (SY-4) Collision Probability (Pc) TrendNot Available

    SL-8 R/B & SHIYAN 4 (SY-4) Miss Distance (Miss Distance) Trend

    SL-8 R/B & SHIYAN 4 (SY-4) Miss Distance (Miss Distance) TrendNot Available

    SL-8 R/BMiss Distance Trend with All Objects

    Object 1 Miss Distance TrendNot Available

    SHIYAN 4 (SY-4)Miss Distance Trend with All Objects

    Object 2 Miss Distance TrendNot Available

    SL-8 R/BCollision Probability Trend

    Object 1 Probability TrendNot Available

    SHIYAN 4 (SY-4)Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with SL-8 R/B

    No nearby objects data