SOCRATES

Search Results


Search parameters:

  • Name(s): Top 10 by Minimum Range
  • Order by Minimum Range
  • 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 Maximum Probability, 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)
43776 OBJECT U [+] 6.899 1.723E-01 0.001 0.004 0.000
43779 OBJECT X [+] 6.899 2019 Feb 20 00:00:00.000 2019 Feb 26 02:20:07.025 2019 Feb 27 00:00:00.000
22183 COSMOS 2212 [?] 1.527 7.395E-03 0.006 0.022 8.842
03840 OPS 2644 DEB [-] 3.170 2019 Feb 20 09:53:02.878 2019 Feb 20 09:53:03.444 2019 Feb 20 09:53:04.009
31698 TERRASAR-X [+] 5.826 6.671E-03 0.006 0.026 0.000
36605 TANDEM-X [+] 7.016 2019 Feb 20 00:00:00.000 2019 Feb 25 15:46:10.513 2019 Feb 27 00:00:00.000
43735 FLOCK 3R-16 [+] 1.849 1.639E-03 0.012 0.052 0.000
43736 FLOCK 3R-15 [+] 1.718 2019 Feb 20 02:32:03.260 2019 Feb 21 13:56:30.279 2019 Feb 23 04:28:50.038
44029 CATSAT-2 [+] 1.926 1.645E-03 0.012 0.052 0.001
44031 UNITE [+] 1.798 2019 Feb 20 10:52:47.344 2019 Feb 20 21:28:53.630 2019 Feb 20 22:11:49.374
40031 FLOCK 1C-4 [+] 1.943 7.285E-04 0.049 0.069 15.107
16496 SL-14 R/B [-] 1.833 2019 Feb 20 17:15:05.288 2019 Feb 20 17:15:05.618 2019 Feb 20 17:15:05.949
43011 HEAD-1 [+] 7.034 4.261E-03 0.018 0.075 0.593
00815 THOR AGENA D R/B [-] 7.801 2019 Feb 26 18:11:15.243 2019 Feb 26 18:11:23.672 2019 Feb 26 18:11:32.101
18119 COSMOS 1858 [?] 5.232 4.655E-04 0.020 0.081 3.434
19360 DELTA 1 DEB [-] 3.882 2019 Feb 23 18:28:51.042 2019 Feb 23 18:28:52.498 2019 Feb 23 18:28:53.954
41032 COSMOS 2510 [+] 3.275 3.317E-04 0.033 0.096 12.638
21400 SL-8 DEB [-] 3.684 2019 Feb 22 12:45:08.221 2019 Feb 22 12:45:08.617 2019 Feb 22 12:45:09.012
07274 METEOR 1-17 [?] 7.405 3.318E-03 0.038 0.097 12.596
05691 THORAD AGENA D DEB [-] 7.671 2019 Feb 26 19:45:00.083 2019 Feb 26 19:45:00.480 2019 Feb 26 19:45:00.877

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 07:45:57 UTC