Conjunction Event Detail

    ✅
    Low Risk
    Low collision probability. Continue monitoring.
    2.393689E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-19T00:54:37+0800
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    1 Object 1

    AOE ID 19039
    NORAD ID 19039
    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 2026-10-19T18:41:09+0000
    Collision Probability (Pc) 2.393689E-6
    Conjunction Distance (km) 2.155 km
    Relative Speed (km/s) 14.899 km/s
    Conjunction Risk Parameters R (Radial): 0.444 | I (In-track): 0.123 | C (Cross-track): -2.104
    Collision Risk Index (CRI) 0.43
    X Position (km) -4786.466 -4788.296
    Position Y (km) 5318.271 5317.229
    Position Z (km) 93.498 93.043
    Velocity X (km/s) -1.455 0.761
    Velocity Y (km/s) -1.446 0.841
    Velocity Z (km/s) 7.169 -7.385

    Orbital Parameters 国际轨道数据源

    Parameter SL-8 R/B SHIYAN 4 (SY-4)
    Semimajor Axis (a) 7136.476 km 7165.980 km
    Eccentricity (e) 0.002331 0.002357
    Inclination (i) 74.0456° 98.6913°
    RAAN 134.9796° 309.9310°
    Perigee Argument 184.8323° 143.7329°
    Mean Anomaly (M) 175.2611° 29.3144°
    Apogee 774.972 km 804.732 km
    Perigee 741.706 km 770.954 km
    Orbit Epoch 2026-10-18T01:00:01+0000 2026-10-17T19:40:37+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