Encounters


As a service to the satellite operator community, the Center for Space Standards & Innovation (CSSI) offers SOCRATES-Satellite Orbital Conjunction Reports Assessing Threatening Encounters in Space. This service provides regular information on pending conjunctions on orbit over the coming week.

Twice each day, CSSI runs a list of all satellite payloads on orbit against a list of all objects on orbit using the catalog of all unclassified NORAD two-line element sets (TLEs) releasable to the public to look for satellite conjunctions over the next seven days. Here you can find a list with amateur-radio related satellites.

CelesTrak SOCRATES, predicts the following Orbital Conjunction Threats

Data current as of 2018 Apr 24 16:05 UTC

Date        Time       SAT 1                    SAT 2                   Minimum Range         Probability     
--------------------------------------------------------------------------------------------------------------
2018 Apr 24 23:22 UTC  LANDSAT 4              - AAUSAT 4                115 m +/- 53 m        1.030E-03
2018 Apr 25 20:28 UTC  HST                    - TAURUS R/B              579 m +/- 161 m       7.030E-04
2018 Apr 25 23:18 UTC  FENGYUN 3A             - COSMOS 2251 DEB         120 m +/- 29 m        2.957E-04
2018 Apr 26 15:24 UTC  RAPIDEYE 1             - CZ-4 DEB                76 m +/- 48 m         2.844E-04
2018 Apr 26 16:42 UTC  IRIDIUM 104            - CZ-4B DEB               104 m +/- 67 m        1.485E-04
2018 Apr 27 04:34 UTC  IRIDIUM 83             - SL-8 R/B                245 m +/- 77 m        9.523E-04
2018 Apr 27 07:30 UTC  COSMOS 2519            - COSMOS 2521             111 m +/- 27 m        3.512E-04
2018 Apr 27 11:03 UTC  COSMOS 1378            - LEMUR-2-BROWNCOW        45 m +/- 13 m         1.778E-03
2018 Apr 27 19:13 UTC  IRIDIUM 75             - SL-8 R/B                66 m +/- 23 m         1.187E-02
2018 Apr 28 07:06 UTC  OBJECT G               - THOR ABLESTAR DEB       103 m +/- 27 m        3.738E-04
2018 Apr 28 23:32 UTC  IRIDIUM 22             - IRIDIUM 102             116 m +/- 50 m        1.548E-03
2018 Apr 29 04:12 UTC  CORIOLIS               - FENGYUN 1C DEB          25 m +/- 7 m          6.206E-03
2018 Apr 29 17:20 UTC  COSMOS 2151            - SJ-6E                   34 m +/- 20 m         1.537E-03
2018 Apr 29 19:49 UTC  IRIDIUM 75             - FENGYUN 1C DEB          277 m +/- 85 m        3.788E-04
2018 Apr 30 17:53 UTC  IRIDIUM 84             - COSMOS 1275 DEB         274 m +/- 65 m        5.031E-04
2018 May 01 09:04 UTC  DX1                    - SL-14 R/B               83 m +/- 59 m         5.026E-04


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