Conjunction Event Detail

    ⚠
    Medium Risk
    Monitor closely. Maneuver recommended for primary asset.
    1.350383E-5
    Collision Probability (Pc)
    Last Conjunction Event Update Time 2026-10-19T01:39:37+0800
    View CDM
    Download CDM 1.0

    1 Object 1

    AOE ID 5531
    NORAD ID 5531
    Object Type DEBRIS
    Country
    CIS CIS
    ← VS →

    2 Object 2

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

    Conjunction Constraints

    Parameter COSMOS 397 DEB * SHIYAN 4 (SY-4)
    Time of Closest Approach 2026-10-20T04:14:03+0000
    Collision Probability (Pc) 1.350383E-5
    Conjunction Distance (km) 1.153 km
    Relative Speed (km/s) 11.087 km/s
    Conjunction Risk Parameters R (Radial): -1.059 | I (In-track): -0.307 | C (Cross-track): 0.334
    Collision Risk Index (CRI) 0.58
    X Position (km) 1125.01 1125.217
    Position Y (km) -2719.423 -2719.406
    Position Z (km) 6519.046 6520.18
    Velocity X (km/s) 5.939 -4.958
    Velocity Y (km/s) 4.424 4.807
    Velocity Z (km/s) 0.835 2.837

    Orbital Parameters 国际轨道数据源

    Parameter COSMOS 397 DEB * SHIYAN 4 (SY-4)
    Semimajor Axis (a) 7138.509 km 7165.980 km
    Eccentricity (e) 0.003607 0.002357
    Inclination (i) 66.6625° 98.6913°
    RAAN 224.6851° 309.9310°
    Perigee Argument 298.5054° 143.7329°
    Mean Anomaly (M) 61.2418° 29.3144°
    Apogee 786.120 km 804.732 km
    Perigee 734.624 km 770.954 km
    Orbit Epoch 2026-10-18T05:09:28+0000 2026-10-17T19:40:37+0000

    COSMOS 397 DEB * & SHIYAN 4 (SY-4) Collision Probability (Pc) Trend

    COSMOS 397 DEB * & SHIYAN 4 (SY-4) Collision Probability (Pc) TrendNot Available

    COSMOS 397 DEB * & SHIYAN 4 (SY-4) Miss Distance (Miss Distance) Trend

    COSMOS 397 DEB * & SHIYAN 4 (SY-4) Miss Distance (Miss Distance) TrendNot Available

    COSMOS 397 DEB *Miss 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

    COSMOS 397 DEB *Collision Probability Trend

    Object 1 Probability TrendNot Available

    SHIYAN 4 (SY-4)Collision Probability Trend

    Object 2 Probability TrendNot Available

    Nearby Objects with COSMOS 397 DEB *

    No nearby objects data