SOCRATES

Search Results


Search parameters:

  • Name(s): Top 10 by Maximum Probability
  • Order by Maximum Probability
  • Return first 10 items


Data current as of 2019 Jun 16 16:06 UTC

Computation Interval: Start = 2019 Jun 16 12:00:00.000, Stop = 2019 Jun 23 12:00:00.000
Computation Threshold: 5.0 km
Considering: 4,690 Primaries, 17,475 Secondaries (28,855 Conjunctions)

See notes at bottom of page for data field descriptions

Re-sort results by Minimum Range, Time In.

Action NORAD
Catalog
Number
Name Days
Since
Epoch
Max
Probability
Dilution
Threshold
(km)
Min
Range
(km)
Relative
Velocity
(km/sec)
Start
(UTC)
TCA
(UTC)
Stop
(UTC)
25489 STEX [-] 5.956 1.000E+00 0.000 0.675 9.707
35387 CBERS 1 DEB [-] 6.645 2019 Jun 21 18:57:57.630 2019 Jun 21 18:57:58.140 2019 Jun 21 18:57:58.651
25489 STEX [-] 6.059 1.000E+00 0.000 2.794 9.697
35387 CBERS 1 DEB [-] 6.748 2019 Jun 21 21:27:05.433 2019 Jun 21 21:27:05.861 2019 Jun 21 21:27:06.288
25489 STEX [-] 5.993 1.000E+00 0.000 2.828 13.928
31267 FENGYUN 1C DEB [-] 6.728 2019 Jun 21 19:52:32.903 2019 Jun 21 19:52:33.199 2019 Jun 21 19:52:33.495
25489 STEX [-] 6.985 1.000E+00 0.000 0.425 14.746
38290 METEOR 2-9 DEB [-] 6.830 2019 Jun 22 19:41:05.900 2019 Jun 22 19:41:06.238 2019 Jun 22 19:41:06.576
25489 STEX [-] 7.067 1.000E+00 0.000 2.919 13.616
34859 COSMOS 2251 DEB [-] 6.760 2019 Jun 22 21:39:07.720 2019 Jun 22 21:39:08.019 2019 Jun 22 21:39:08.317
25489 STEX [-] 0.718 1.000E+00 0.000 2.912 14.978
18475 DELTA 1 DEB [-] 1.107 2019 Jun 16 13:16:29.740 2019 Jun 16 13:16:30.012 2019 Jun 16 13:16:30.283
25489 STEX [-] 0.787 1.000E+00 0.000 2.636 14.977
18475 DELTA 1 DEB [-] 1.176 2019 Jun 16 14:55:43.543 2019 Jun 16 14:55:43.826 2019 Jun 16 14:55:44.110
25489 STEX [-] 2.049 1.000E+00 0.000 2.197 14.033
40223 COSMOS 2251 DEB [-] 2.877 2019 Jun 17 21:12:08.413 2019 Jun 17 21:12:08.733 2019 Jun 17 21:12:09.054
25489 STEX [-] 3.606 1.000E+00 0.000 2.681 14.365
33960 IRIDIUM 33 DEB [-] 3.397 2019 Jun 19 10:34:49.132 2019 Jun 19 10:34:49.425 2019 Jun 19 10:34:49.719
25489 STEX [-] 3.642 1.000E+00 0.000 1.621 12.590
34103 IRIDIUM 33 DEB [-] 3.602 2019 Jun 19 11:26:47.314 2019 Jun 19 11:26:47.690 2019 Jun 19 11:26:48.066

10 records found

Data Fields:
  • Action: The Analysis button links to a page which provides a capability to build an interactive 3-D STK/CAT (Conjunction Analysis Tools) scenario detailing the conjunction.
  • NORAD Catalog Number: NORAD Catalog Numbers of the two conjuncting objects.
  • Name: Common names of the two conjuncting objects. Operational status of each object is shown in brackets, using the standard CelesTrak SATCAT codes.
  • Days Since Epoch: The number of days from the epoch of the NORAD two-line element set or operator ephemerides (green) used to produce the prediction until the time of closest approach for the conjunction.
  • Max Probability: Given fixed spherical object radii and relative distance at the time of closest approach (TCA), the projected covariance ellipse is sized and oriented to produce the maximum probability. For these reports the ratio of major-to-minor axes of the projected covariance ellipse is set using radial, in-track, and cross-track values of 100 m, 300 m, 100 m, respectively. If the combined object radius is greater than the relative distance, the maximum probability will be one; such occurrences are not addressed here.
  • Dilution Threshold (km): The standard deviation that produces the maximum probability defines the threshold of dilution. A smaller or larger standard deviation will produce a smaller probability. In the case of computing true probability with a smaller standard deviation, the data is of sufficient quality to associate low probability with low risk. For a larger standard deviation, this is not the case and the resulting true probability calculation becomes "diluted." If operating in this dilution region, the recommendation is to obtain better data and reassess the encounter. If time or resources do not permit, then the maximum probability should be used in place of the true probability.
  • Min Range (km): The distance between the two conjuncting objects at the time of closest approach.
  • Start (UTC): Time when the two conjuncting objects come within the computation threshold from each other.
  • TCA (UTC): Time of closest approach.
  • Stop (UTC): Time when the two conjuncting objects move beyond the computation threshold from each other.
  • Relative Velocity (km/sec): Relative velocity of the two conjuncting objects at the time of closest approach.

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Dr. T.S. Kelso [TS.Kelso@celestrak.com]
Follow CelesTrak on Twitter @TSKelso
Last updated: 2019 Jun 16 17:43:21 UTC
Accessed 1 times since 2000 December 16
Current system time: 2019 Jun 17 01:18:15 UTC