SOCRATES

Search Results


Search parameters:

  • Name(s): Top 10 by Minimum Range
  • Order by Minimum Range
  • Return first 10 items


Data current as of 2018 Aug 15 08:05 UTC

Computation Interval: Start = 2018 Aug 15 00:00:00.000, Stop = 2018 Aug 22 00:00:00.000
Computation Threshold: 5.0 km
Considering: 4,276 Primaries, 17,040 Secondaries (24,401 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)
28893 SINAH 1 [+] 2.870 1.459E-03 0.021 0.033 14.833
27688 CZ-4B DEB [-] 4.188 2018 Aug 17 08:21:46.118 2018 Aug 17 08:21:46.455 2018 Aug 17 08:21:46.792
40036 FLOCK 1C-6 [P] 3.852 2.887E-03 0.025 0.035 15.115
16496 SL-14 R/B [-] 3.359 2018 Aug 18 04:45:36.935 2018 Aug 18 04:45:37.266 2018 Aug 18 04:45:37.597
23814 REX 2 [?] 6.715 2.144E-04 0.047 0.069 14.845
39979 SL-14 DEB [-] 8.010 2018 Aug 21 12:58:52.765 2018 Aug 21 12:58:53.102 2018 Aug 21 12:58:53.439
27664 XSS-10 [?] 2.367 3.931E-04 0.036 0.074 14.034
30019 FENGYUN 1C DEB [-] 1.576 2018 Aug 16 06:48:04.895 2018 Aug 16 06:48:05.251 2018 Aug 16 06:48:05.607
25275 IRIDIUM 59 [+] 6.588 1.766E-03 0.059 0.085 14.923
29802 FENGYUN 1C DEB [-] 6.019 2018 Aug 20 20:09:31.356 2018 Aug 20 20:09:31.691 2018 Aug 20 20:09:32.026
04331 OPS 0054 (DMSP 5A F1) [-] 2.010 5.598E-04 0.026 0.087 9.381
42201 COSMOS 1275 DEB [-] 1.117 2018 Aug 16 06:02:53.028 2018 Aug 16 06:02:53.561 2018 Aug 16 06:02:54.093
32790 CANX-2 [-] 6.573 4.932E-04 0.022 0.094 2.202
32468 CBERS 1 DEB [-] 5.893 2018 Aug 20 04:07:48.490 2018 Aug 20 04:07:50.760 2018 Aug 20 04:07:53.031
42991 SKYSAT-C7 [+] 5.377 5.017E-04 0.022 0.094 0.277
42995 FLOCK 3M-1 [+] 5.451 2018 Aug 20 12:14:44.056 2018 Aug 20 12:15:02.078 2018 Aug 20 12:15:20.100
20438 UOSAT 4 (UO-15) [-] 1.309 2.011E-04 0.064 0.100 14.723
35174 FENGYUN 1C DEB [-] 2.269 2018 Aug 15 19:51:28.405 2018 Aug 15 19:51:28.744 2018 Aug 15 19:51:29.084
41579 COSMOS 2517 (GEO-IK 2) [+] 0.535 1.354E-04 0.074 0.104 14.769
42167 COSMOS 1275 DEB [-] 3.486 2018 Aug 15 18:22:17.800 2018 Aug 15 18:22:18.139 2018 Aug 15 18:22:18.477

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: 2018 Aug 15 09:25:39 UTC
Accessed 1 times since 2000 December 16
Current system time: 2018 Aug 15 14:25:44 UTC