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 20 00:06 UTC

Computation Interval: Start = 2019 Feb 20 00:00:00.000, Stop = 2019 Feb 27 00:00:00.000
Computation Threshold: 5.0 km
Considering: 4,557 Primaries, 17,406 Secondaries (26,489 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 [-] 3.813 1.000E+00 0.000 1.755 5.666
40235 COSMOS 2251 DEB [-] 6.562 2019 Feb 23 02:59:52.852 2019 Feb 23 02:59:53.678 2019 Feb 23 02:59:54.505
25489 STEX [-] 4.239 1.000E+00 0.000 2.381 2.072
35796 COSMOS 2251 DEB [-] 3.981 2019 Feb 23 13:13:50.158 2019 Feb 23 13:13:52.279 2019 Feb 23 13:13:54.401
25489 STEX [-] 4.819 4.655E-01 0.406 3.029 13.454
30821 FENGYUN 1C DEB [-] 5.324 2019 Feb 24 03:09:03.531 2019 Feb 24 03:09:03.827 2019 Feb 24 03:09:04.122
25489 STEX [-] 4.972 4.327E-01 0.778 3.253 0.470
40555 COSMOS 2504 [+] 4.586 2019 Feb 24 06:48:24.699 2019 Feb 24 06:48:32.777 2019 Feb 24 06:48:40.857
25489 STEX [-] 3.917 4.310E-01 0.817 3.242 7.917
17717 THORAD AGENA D DEB [-] 4.424 2019 Feb 23 05:30:08.238 2019 Feb 23 05:30:08.719 2019 Feb 23 05:30:09.200
25489 STEX [-] 0.762 4.010E-01 0.842 3.127 14.676
39846 SL-16 DEB [-] 19.515 2019 Feb 20 01:46:12.039 2019 Feb 20 01:46:12.305 2019 Feb 20 01:46:12.571
25489 STEX [-] 3.193 3.255E-01 1.420 3.458 14.599
26152 CZ-4B DEB [-] 3.292 2019 Feb 22 12:07:02.445 2019 Feb 22 12:07:02.693 2019 Feb 22 12:07:02.940
25489 STEX [-] 1.708 3.095E-01 1.357 3.941 11.814
17719 THORAD AGENA D DEB [-] 2.052 2019 Feb 21 00:28:52.332 2019 Feb 21 00:28:52.592 2019 Feb 21 00:28:52.853
25489 STEX [-] 7.508 2.951E-01 1.229 4.334 6.926
22442 SL-16 DEB [-] 8.076 2019 Feb 26 19:40:33.046 2019 Feb 26 19:40:33.406 2019 Feb 26 19:40:33.766
25489 STEX [-] 5.132 2.949E-01 1.196 4.380 5.063
32098 FENGYUN 1C DEB [-] 7.510 2019 Feb 24 10:40:10.663 2019 Feb 24 10:40:11.140 2019 Feb 24 10:40:11.616

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 20 01:34:56 UTC
Accessed 1 times since 2000 December 16
Current system time: 2019 Feb 20 06:57:47 UTC