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 Jan 24 00:06 UTC

Computation Interval: Start = 2019 Jan 24 00:00:00.000, Stop = 2019 Jan 31 00:00:00.000
Computation Threshold: 5.0 km
Considering: 4,549 Primaries, 17,254 Secondaries (26,166 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)
25467 IRIDIUM 82 [-] 2.669 1.000E+00 0.000 1.943 4.106
25489 STEX [-] 3.160 2019 Jan 26 01:13:28.348 2019 Jan 26 01:13:29.470 2019 Jan 26 01:13:30.592
25489 STEX [-] 3.469 1.000E+00 0.000 1.287 14.529
35397 CZ-4 DEB [-] 3.650 2019 Jan 26 08:38:11.906 2019 Jan 26 08:38:12.239 2019 Jan 26 08:38:12.571
25489 STEX [-] 4.227 1.000E+00 0.000 2.927 14.884
29814 FENGYUN 1C DEB [-] 4.372 2019 Jan 27 02:49:30.161 2019 Jan 27 02:49:30.433 2019 Jan 27 02:49:30.706
25489 STEX [-] 4.508 1.000E+00 0.000 0.991 14.317
39429 DOVE 3 [+] 3.852 2019 Jan 27 09:34:25.726 2019 Jan 27 09:34:26.068 2019 Jan 27 09:34:26.411
25489 STEX [-] 5.264 1.000E+00 0.000 2.859 8.720
37133 COSMOS 2251 DEB [-] 8.662 2019 Jan 28 03:42:32.867 2019 Jan 28 03:42:33.338 2019 Jan 28 03:42:33.808
25489 STEX [-] 5.648 4.565E-01 0.552 3.055 12.921
37733 CZ-2C DEB [-] 5.003 2019 Jan 28 12:55:39.933 2019 Jan 28 12:55:40.239 2019 Jan 28 12:55:40.545
25489 STEX [-] 3.735 4.495E-01 0.745 3.126 9.850
22491 PEGASUS R/B [-] 3.152 2019 Jan 26 15:00:36.879 2019 Jan 26 15:00:37.275 2019 Jan 26 15:00:37.671
25489 STEX [-] 8.018 4.237E-01 0.715 3.092 14.332
43501 COSMOS 1900 DEB [-] 8.606 2019 Jan 30 21:48:27.657 2019 Jan 30 21:48:27.931 2019 Jan 30 21:48:28.205
25489 STEX [-] 2.330 3.810E-01 1.107 3.419 12.027
34160 IRIDIUM 33 DEB [-] 2.248 2019 Jan 25 05:18:07.070 2019 Jan 25 05:18:07.374 2019 Jan 25 05:18:07.677
25489 STEX [-] 5.929 3.461E-01 1.053 3.862 6.051
03554 COSMOS 252 DEB [-] 5.880 2019 Jan 28 19:40:59.284 2019 Jan 28 19:40:59.809 2019 Jan 28 19:41:00.334

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 Jan 24 01:35:02 UTC
Accessed 1 times since 2000 December 16
Current system time: 2019 Jan 24 08:37:10 UTC