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 Feb 21 08:06 UTC

Computation Interval: Start = 2019 Feb 21 00:00:00.000, Stop = 2019 Feb 28 00:00:00.000
Computation Threshold: 5.0 km
Considering: 4,556 Primaries, 17,401 Secondaries (26,663 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 [-] 2.362 1.000E+00 0.000 1.742 5.666
40235 COSMOS 2251 DEB [-] 6.562 2019 Feb 23 02:59:52.863 2019 Feb 23 02:59:53.690 2019 Feb 23 02:59:54.517
25489 STEX [-] 2.789 1.000E+00 0.000 2.361 2.072
35796 COSMOS 2251 DEB [-] 2.663 2019 Feb 23 13:13:50.195 2019 Feb 23 13:13:52.322 2019 Feb 23 13:13:54.449
25489 STEX [-] 3.521 4.771E-01 0.469 3.040 0.470
40555 COSMOS 2504 [+] 3.550 2019 Feb 24 06:48:24.854 2019 Feb 24 06:48:33.294 2019 Feb 24 06:48:41.736
25489 STEX [-] 2.467 4.649E-01 0.617 3.076 7.917
17717 THORAD AGENA D DEB [-] 2.920 2019 Feb 23 05:30:08.197 2019 Feb 23 05:30:08.695 2019 Feb 23 05:30:09.193
25489 STEX [-] 3.369 3.903E-01 1.083 3.271 13.454
30821 FENGYUN 1C DEB [-] 3.308 2019 Feb 24 03:09:03.548 2019 Feb 24 03:09:03.829 2019 Feb 24 03:09:04.110
25489 STEX [-] 7.026 3.253E-01 1.424 3.492 14.248
05395 1971-067 AKM [-] 6.599 2019 Feb 27 18:55:21.674 2019 Feb 27 18:55:21.926 2019 Feb 27 18:55:22.177
25489 STEX [-] 1.742 3.096E-01 1.513 3.545 14.599
26152 CZ-4B DEB [-] 1.955 2019 Feb 22 12:07:02.459 2019 Feb 22 12:07:02.701 2019 Feb 22 12:07:02.942
25489 STEX [-] 0.257 2.969E-01 1.404 4.049 11.814
17719 THORAD AGENA D DEB [-] 0.530 2019 Feb 21 00:28:52.348 2019 Feb 21 00:28:52.596 2019 Feb 21 00:28:52.844
25489 STEX [-] 3.682 2.968E-01 1.190 4.359 5.063
32098 FENGYUN 1C DEB [-] 7.510 2019 Feb 24 10:40:10.662 2019 Feb 24 10:40:11.146 2019 Feb 24 10:40:11.630
25489 STEX [-] 6.057 2.668E-01 1.327 4.664 6.926
22442 SL-16 DEB [-] 5.965 2019 Feb 26 19:40:33.013 2019 Feb 26 19:40:33.274 2019 Feb 26 19:40:33.534

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 Feb 21 09:38:21 UTC
Accessed 1 times since 2000 December 16
Current system time: 2019 Feb 21 16:49:51 UTC