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 Apr 23 08:06 UTC

Computation Interval: Start = 2019 Apr 23 00:00:00.000, Stop = 2019 Apr 30 00:00:00.000
Computation Threshold: 5.0 km
Considering: 4,601 Primaries, 17,359 Secondaries (26,766 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 [-] 5.167 1.000E+00 0.000 1.613 11.138
39858 SL-16 DEB [-] 6.592 2019 Apr 28 04:41:35.017 2019 Apr 28 04:41:35.442 2019 Apr 28 04:41:35.867
25489 STEX [-] 6.479 1.000E+00 0.000 0.627 12.822
19945 SL-8 DEB [-] 6.733 2019 Apr 29 12:11:41.466 2019 Apr 29 12:11:41.853 2019 Apr 29 12:11:42.240
25489 STEX [-] 1.266 1.000E+00 0.000 2.113 14.946
28058 CHUANGXIN 1 (CX-1) [+] 1.395 2019 Apr 24 07:04:44.653 2019 Apr 24 07:04:44.956 2019 Apr 24 07:04:45.259
25489 STEX [-] 2.156 1.000E+00 0.000 2.593 8.735
41790 SCATSAT 1 [+] 2.016 2019 Apr 25 04:26:33.406 2019 Apr 25 04:26:33.896 2019 Apr 25 04:26:34.385
25489 STEX [-] 2.949 1.000E+00 0.000 1.860 11.541
34331 COSMOS 2251 DEB [-] 3.159 2019 Apr 25 23:28:29.309 2019 Apr 25 23:28:29.711 2019 Apr 25 23:28:30.114
25489 STEX [-] 3.814 1.000E+00 0.000 2.173 14.496
41372 NOAA 16 DEB [-] 3.725 2019 Apr 26 20:13:58.234 2019 Apr 26 20:13:58.544 2019 Apr 26 20:13:58.855
25489 STEX [-] 1.163 3.909E-01 0.895 3.531 3.682
26134 CZ-4B DEB [-] 1.372 2019 Apr 24 04:35:32.803 2019 Apr 24 04:35:33.765 2019 Apr 24 04:35:34.726
25489 STEX [-] 4.238 3.758E-01 1.034 3.197 14.661
28598 METEOR 2-9 DEB [-] 7.520 2019 Apr 27 06:23:24.925 2019 Apr 27 06:23:25.187 2019 Apr 27 06:23:25.449
25489 STEX [-] 1.328 3.504E-01 1.289 3.446 13.738
42366 NOAA 16 DEB [-] 2.253 2019 Apr 24 08:33:50.352 2019 Apr 24 08:33:50.615 2019 Apr 24 08:33:50.879
25489 STEX [-] 6.679 3.136E-01 1.377 3.848 12.388
38208 COSMOS 2251 DEB [-] 6.601 2019 Apr 29 16:58:51.916 2019 Apr 29 16:58:52.174 2019 Apr 29 16:58:52.431

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.

TLE Data Space Data
Current GPS
Archives EOP
Documentation Space Weather
SATCAT Columns
Boxscore Software
SOCRATES
Dr. T.S. Kelso [TS.Kelso@celestrak.com]
Follow CelesTrak on Twitter @TSKelso
Last updated: 2019 Apr 23 09:36:58 UTC
Accessed 1 times since 2000 December 16
Current system time: 2019 Apr 23 16:32:40 UTC