Conjunction Event Detail

    ✅
    Low Risk
    Low collision probability. Continue monitoring.
    2.150305E-6
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-20T00:04:17+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) 2.150305E-6
    Conjunction Distance (km) 2.261 km
    Relative Speed (km/s) 14.899 km/s
    Conjunction Risk Parameters R (Radial): 0.425 | I (In-track): 0.144 | C (Cross-track): -2.215
    Collision Risk Index (CRI) 0.42
    X Position (km) -4786.375 -4788.275
    Position Y (km) 5318.315 5317.184
    Position Z (km) 93.446 92.981
    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 7165.979 km
    Eccentricity (e) 0.002327 0.002361
    Inclination (i) 74.0454° 98.6912°
    RAAN 133.1835° 311.1598°
    Perigee Argument 182.7381° 140.2567°
    Mean Anomaly (M) 177.3651° 238.6856°
    Apogee 774.943 km 804.762 km
    Perigee 741.735 km 770.922 km
    Orbit Epoch 2026-10-19T00:20:32+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