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 Sep 22 00:08 UTC

Computation Interval: Start = 2019 Sep 22 00:00:00.000, Stop = 2019 Sep 29 00:00:00.000
Computation Threshold: 5.0 km
Considering: 4,846 Primaries, 17,711 Secondaries (28,677 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)
44069 SOYUZ-MS 12 [+] 1.440 1.000E+00 0.000 0.000 0.000
44455 PROGRESS-MS 12 [+] 1.440 2019 Sep 22 00:00:00.000 2019 Sep 22 00:00:00.000 2019 Sep 29 00:00:00.000
44069 SOYUZ-MS 12 [+] 1.440 1.000E+00 0.000 0.000 0.000
44437 SOYUZ-MS 13 [+] 1.440 2019 Sep 22 00:00:00.000 2019 Sep 22 00:00:00.000 2019 Sep 29 00:00:00.000
37168 SBSS (USA 216) [+] 3.519 9.847E-03 0.013 0.019 15.082
16496 SL-14 R/B [-] 4.253 2019 Sep 25 09:22:16.730 2019 Sep 25 09:22:17.061 2019 Sep 25 09:22:17.393
01577 PORCUPINE 2 [?] 6.417 6.235E-03 0.006 0.026 1.145
41078 NOAA 16 DEB [-] 7.008 2019 Sep 27 20:50:14.832 2019 Sep 27 20:50:19.197 2019 Sep 27 20:50:23.563
22825 EYESAT A (AO-27) [-] 1.462 3.932E-03 0.011 0.046 0.038
28303 DMSP 5D-2 F11 DEB [-] 0.951 2019 Sep 22 11:38:12.645 2019 Sep 22 11:40:24.018 2019 Sep 22 11:42:35.426
41609 FLOCK 2P-2 [+] 6.545 8.852E-04 0.021 0.056 12.565
34042 COSMOS 2251 DEB [-] 7.152 2019 Sep 28 06:16:07.156 2019 Sep 28 06:16:07.554 2019 Sep 28 06:16:07.952
36598 PICARD [-] 19.510 3.820E-04 0.040 0.068 14.565
15783 THOR ABLESTAR DEB [-] 6.747 2019 Sep 27 05:37:44.552 2019 Sep 27 05:37:44.895 2019 Sep 27 05:37:45.238
42029 FLOCK 3P-50 [+] 7.078 3.021E-04 0.047 0.073 14.987
44220 MICROSAT-R DEB [-] 7.154 2019 Sep 28 20:32:30.121 2019 Sep 28 20:32:30.454 2019 Sep 28 20:32:30.788
44207 TIANHUI 2-01A [+] 0.870 6.522E-04 0.019 0.082 0.001
44209 TIANHUI 2-01B [+] 0.795 2019 Sep 22 00:00:00.000 2019 Sep 22 16:04:40.958 2019 Sep 25 09:39:46.600
44388 OBJECT B [+] 6.104 5.231E-04 0.023 0.086 7.489
38299 CZ-2D DEB [-] 6.305 2019 Sep 27 23:52:44.584 2019 Sep 27 23:52:45.252 2019 Sep 27 23:52:45.919

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 Sep 22 01:45:53 UTC
Accessed 1 times since 2000 December 16
Current system time: 2019 Sep 22 06:36:13 UTC