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 Aug 24 00:06 UTC

Computation Interval: Start = 2019 Aug 24 00:00:00.000, Stop = 2019 Aug 31 00:00:00.000
Computation Threshold: 5.0 km
Considering: 4,816 Primaries, 17,658 Secondaries (28,225 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 [-] 6.405 1.000E+00 0.000 1.550 12.444
31165 FENGYUN 1C DEB [-] 7.355 2019 Aug 29 19:49:53.855 2019 Aug 29 19:49:54.237 2019 Aug 29 19:49:54.619
44069 SOYUZ-MS 12 [+] 1.451 1.000E+00 0.000 0.000 0.000
44455 PROGRESS-MS 12 [+] 1.451 2019 Aug 24 00:00:00.000 2019 Aug 24 00:00:00.000 2019 Aug 31 00:00:00.000
44069 SOYUZ-MS 12 [+] 1.451 1.000E+00 0.000 0.000 0.000
44446 DRAGON CRS-18 [+] 1.451 2019 Aug 24 00:00:00.000 2019 Aug 24 00:00:00.000 2019 Aug 31 00:00:00.000
44069 SOYUZ-MS 12 [+] 1.451 1.000E+00 0.000 0.000 0.000
44437 SOYUZ-MS 13 [+] 1.451 2019 Aug 24 00:00:00.000 2019 Aug 24 00:00:00.000 2019 Aug 31 00:00:00.000
25489 STEX [-] 1.816 1.000E+00 0.000 2.054 14.831
28070 CZ-4B DEB [-] 2.361 2019 Aug 25 05:41:35.794 2019 Aug 25 05:41:36.101 2019 Aug 25 05:41:36.408
25489 STEX [-] 1.954 1.000E+00 0.000 2.641 14.827
28070 CZ-4B DEB [-] 2.500 2019 Aug 25 09:00:26.953 2019 Aug 25 09:00:27.239 2019 Aug 25 09:00:27.526
25489 STEX [-] 1.885 1.000E+00 0.000 1.804 14.829
28070 CZ-4B DEB [-] 2.431 2019 Aug 25 07:21:01.356 2019 Aug 25 07:21:01.670 2019 Aug 25 07:21:01.984
25489 STEX [-] 2.191 1.000E+00 0.000 1.227 13.921
33864 IRIDIUM 33 DEB [-] 2.162 2019 Aug 25 14:41:49.651 2019 Aug 25 14:41:49.999 2019 Aug 25 14:41:50.347
25489 STEX [-] 2.195 1.000E+00 0.000 2.041 14.213
26654 CZ-4B DEB [-] 1.791 2019 Aug 25 14:47:05.012 2019 Aug 25 14:47:05.333 2019 Aug 25 14:47:05.654
25489 STEX [-] 3.442 1.000E+00 0.000 0.855 3.726
43391 WORLDVIEW-2 DEB [-] 3.292 2019 Aug 26 20:42:56.428 2019 Aug 26 20:42:57.750 2019 Aug 26 20:42:59.072

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]
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Last updated: 2019 Aug 24 01:45:11 UTC
Accessed 1 times since 2000 December 16
Current system time: 2019 Aug 24 07:46:37 UTC