Conjunction Event Detail

    ✅
    Low Risk
    Low collision probability. Continue monitoring.
    2.274264E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-20T19:48:48+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) 2.274264E-6
    Conjunction Distance (km) 2.19 km
    Relative Speed (km/s) 14.559 km/s
    Conjunction Risk Parameters R (Radial): 1.783 | I (In-track): -0.294 | C (Cross-track): -1.237
    Collision Risk Index (CRI) 0.42
    X Position (km) -2323.207 -2323.698
    Position Y (km) 973.099 972.23
    Position Z (km) 6687.008 6685.059
    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 7165.978 km
    Eccentricity (e) 0.002660 0.002365
    Inclination (i) 74.0423° 98.6911°
    RAAN 110.1712° 311.9589°
    Perigee Argument 193.2567° 137.9703°
    Mean Anomaly (M) 166.7891° 35.1502°
    Apogee 785.962 km 804.789 km
    Perigee 747.944 km 770.893 km
    Orbit Epoch 2026-10-19T23:10:22+0000 2026-10-19T20:20:12+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