Space Conjunction Data Service

    A global standardized CDM data service platform for space conjunction detection, risk analytics

    Conjunction data in this service is generated through a preliminary screening process based on SGP4 (Simplified General Perturbations Model 4) orbit propagation. Space object ephemerides are propagated using publicly available orbital elements to identify potential close-approach events and produce candidate Conjunction Data Messages (CDMs).
    This dataset is provided as a rapid screening product for preliminary conjunction assessment, supporting early detection and prioritization of potential close-approach events. It serves as upstream input for high-precision orbit determination (OD), covariance analysis, and refined collision probability (Pc) evaluation.
    Data Production Rules
    Minimum Miss Distance ≤ 3 km, latest approach time ≤ 72 hours
    Today Events
    0
    Period: 11-09 00:00 ~ 11-09 23:59
    Month Events
    0
    Period: 11-01 ~ 11-30
    Next 3 Days Events
    0
    Period: 11-09 00:00 ~ Day 3 23:59
    High Risk Events
    0
    Today 1096
    Tomorrow 2486
    Day after 1020
    Extreme(>10⁻³) + High(10⁻³~10⁻⁴)
    Monitored Objects
    0
    Total monitored space objects

    Collision Level Distribution (Next 3 Days)

    Data Update Time:2026-11-09T19:00:00Z
    Extreme Risk 186 0.2%
    High Risk 999+ 5.3%
    Medium Risk 999+ 16.6%
    Low Risk 999+ 65.1%
    Very Low Risk 999+ 12.9%
    Collision Probability Levels (1-5)

    Upcoming Collision Events (Next 3 Days)

    Data Update Time:2026-11-09T19:00:00Z
    2026-11-10T05:08:09+0000 极高风险: 1.689276E-3
    2026-11-11T01:23:36+0000 极高风险: 1.68528E-3
    2026-11-10T23:59:37+0000 极高风险: 1.679705E-3
    View All Events

    Miss Distance Level Distribution (Next 3 Days)

    Data Update Time:2026-11-09T19:00:00Z
    Extremely Close Range 9 0.0%
    Close Range 154 0.2%
    Medium Range 999+ 1.4%
    Long Range 999+ 15.5%
    Extremely Long Range 999+ 82.8%
    Miss Distance Levels (1-5)

    Upcoming Miss Distance Events (Next 3 Days)

    Data Update Time:2026-11-09T19:00:00Z
    2026-11-11T12:09:59+0000 极近距离: 0.008km
    2026-11-11T01:23:36+0000 极近距离: 0.011km
    2026-11-10T05:08:09+0000 极近距离: 0.011km
    View All Events

    Conjunction Heatmap - Today

    Data Update Time:2026-11-09T19:00:00Z
    Event count distribution by altitude layer × date
    Conjunction Heatmap - Today

    Recent Conjunction Events

    Event ID Objects TCA
    Miss Distance
    Dist Level
    Collision Risk Probability (CRP)
    Risk Level
    Collision Risk Index (CRI) Rel. Velocity Action
    CDM_261109-000002-262606-987123
    2026-11-09T
    00:00:33+0000
    1.768 km
    极远距离
    4.07123E-6 低风险
    0.47 15.12km/s
    CDM_261109-000006-683306-735221
    2026-11-09T
    00:00:45+0000
    2.91 km
    极远距离
    1.251108E-6 低风险
    0.37 12.308km/s
    CDM_261109-000006-275906-822621
    2026-11-09T
    00:00:56+0000
    2.814 km
    极远距离
    1.188271E-6 低风险
    0.36 10.418km/s
    CDM_261109-000103-145206-070922
    2026-11-09T
    00:01:04+0000
    1.198 km
    极远距离
    6.858339E-6 低风险
    0.52 5.063km/s
    CDM_261109-000106-552106-868521
    2026-11-09T
    00:01:31+0000
    1.925 km
    极远距离
    3.195765E-6 低风险
    0.45 15.043km/s
    CDM_261109-000103-014104-434122
    OTB (44341)
    2026-11-09T
    00:01:33+0000
    0.524 km
    远距离
    1.654845E-4 高风险
    0.79 12.374km/s
    CDM_261109-000106-704706-783221
    2026-11-09T
    00:01:48+0000
    2.986 km
    极远距离
    1.060645E-6 低风险
    0.36 9.716km/s
    CDM_261109-000102-236202-539624
    TMSAT (25396)
    2026-11-09T
    00:01:56+0000
    1.433 km
    极远距离
    7.383585E-6 低风险
    0.52 13.646km/s
    CDM_261109-000206-300306-484221
    2026-11-09T
    00:02:02+0000
    2.452 km
    极远距离
    1.760473E-6 低风险
    0.4 14.011km/s
    CDM_261109-000202-599706-112521
    2026-11-09T
    00:02:16+0000
    2.902 km
    极远距离
    1.073588E-6 低风险
    0.36 9.346km/s
    View All Events

    Space Object Flight Safety Monitoring Process

    ② Space Conjunction Data Service Conjunction params, risk calculation & assessment (Space Conjunction Data Service)
    ↑
    ① AOE Orbital Elements ADS Orbital Elements
    Daily Monitoring
    ③ High-Risk Check (High-Risk Check)
    →
    ④ TianShu Collision Warning Service Observation tracking, orbit det., collision calc. (TianShu Collision Warning Service)
    Loop
    ⑥ TianShu Safety Check Orbit extrapolation, risk assessment, continuous monitoring (TianShu Safety Check)
    ←
    ⑤ Collision Warning Report Plan iteration, safety check, avoidance advice (Collision Warning Report)
    ↓
    High-Risk Monitoring

    Event Alert Subscription

    Receive instant alerts for conjunctions of your tracked objects

    Submission coming soon. Please contact our sales for activation.

    Premium Service VIP Only

    High-precision CDM push, customized filters, dedicated support

    High-precision Orbit Determination (OD) reports
    Real-time CDM push to email or API endpoints
    Custom probability thresholds and alert rules
    7×24 dedicated technical support team
    Contact Sales
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