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 22 16:06 UTC

Computation Interval: Start = 2019 Feb 22 12:00:00.000, Stop = 2019 Mar 01 12:00:00.000
Computation Threshold: 5.0 km
Considering: 4,559 Primaries, 17,397 Secondaries (26,742 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 [+] 4.527 9.133E-03 0.005 0.022 0.000
43779 OBJECT X [+] 3.925 2019 Feb 22 12:00:00.000 2019 Feb 25 16:00:11.996 2019 Mar 01 12:00:00.000
43775 OBJECT T [+] 6.067 4.446E-03 0.007 0.031 0.000
43776 OBJECT U [+] 6.669 2019 Feb 25 08:59:12.824 2019 Feb 27 19:24:36.552 2019 Mar 01 12:00:00.000
07714 METEOR 1-21 [?] 1.183 1.497E-02 0.024 0.034 14.818
41269 NOAA 16 DEB [-] 0.985 2019 Feb 23 09:18:11.864 2019 Feb 23 09:18:12.202 2019 Feb 23 09:18:12.539
39770 SPROUT [+] 2.039 6.359E-04 0.033 0.049 15.021
38244 IRIDIUM 33 DEB [-] 3.441 2019 Feb 24 13:07:22.501 2019 Feb 24 13:07:22.833 2019 Feb 24 13:07:23.166
43815 FALCONSAT-6 [+] 3.063 5.575E-04 0.036 0.051 15.212
29033 PEGASUS DEB [-] 4.798 2019 Feb 25 12:34:21.744 2019 Feb 25 12:34:22.072 2019 Feb 25 12:34:22.401
25477 ORBCOMM FM23 [+] 5.018 1.888E-03 0.027 0.060 13.568
43479 IRIDIUM 152 [+] 4.641 2019 Feb 27 02:19:55.669 2019 Feb 27 02:19:56.038 2019 Feb 27 02:19:56.406
12791 COSMOS 1302 [?] 5.666 3.382E-03 0.038 0.067 14.416
00733 THOR AGENA D R/B [-] 5.609 2019 Feb 28 03:18:08.280 2019 Feb 28 03:18:08.627 2019 Feb 28 03:18:08.974
07714 METEOR 1-21 [?] 3.600 3.428E-03 0.050 0.071 14.829
41288 NOAA 16 DEB [-] 3.831 2019 Feb 25 19:19:27.915 2019 Feb 25 19:19:28.252 2019 Feb 25 19:19:28.589
42964 IRIDIUM 125 [+] 3.821 7.121E-04 0.019 0.075 6.257
28986 METEOR 2-6 DEB [-] 4.820 2019 Feb 26 06:47:50.294 2019 Feb 26 06:47:51.093 2019 Feb 26 06:47:51.892
16727 COSMOS 1745 [?] 4.148 2.539E-03 0.020 0.080 5.619
29740 FENGYUN 1C DEB [-] 4.845 2019 Feb 26 06:44:29.105 2019 Feb 26 06:44:29.995 2019 Feb 26 06:44:30.884

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 22 17:38:00 UTC
Accessed 1 times since 2000 December 16
Current system time: 2019 Feb 22 18:26:49 UTC