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 Jun 16 16:06 UTC

Computation Interval: Start = 2019 Jun 16 12:00:00.000, Stop = 2019 Jun 23 12:00:00.000
Computation Threshold: 5.0 km
Considering: 4,690 Primaries, 17,475 Secondaries (28,855 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)
40045 AEROCUBE 6A [+] 4.557 9.151E-03 0.014 0.020 15.146
15332 SL-14 R/B [-] 4.529 2019 Jun 20 17:59:09.976 2019 Jun 20 17:59:10.306 2019 Jun 20 17:59:10.636
17589 COSMOS 1833 [?] 4.513 5.142E-03 0.008 0.024 11.688
40517 DMSP 5D-2 F13 DEB [-] 5.176 2019 Jun 20 10:30:15.040 2019 Jun 20 10:30:15.468 2019 Jun 20 10:30:15.895
20103 NADEZHDA 1 [-] 3.052 1.677E-02 0.008 0.035 1.117
16511 SL-8 R/B [-] 3.048 2019 Jun 19 05:26:56.546 2019 Jun 19 05:27:01.020 2019 Jun 19 05:27:05.495
22184 COSMOS 2213 [?] 6.935 9.826E-03 0.013 0.041 10.049
01589 SL-8 R/B [-] 7.568 2019 Jun 23 11:22:29.664 2019 Jun 23 11:22:30.162 2019 Jun 23 11:22:30.660
05614 COSMOS 457 [?] 2.545 8.107E-04 0.030 0.043 14.380
33693 FENGYUN 1C DEB [-] 2.747 2019 Jun 18 09:25:37.319 2019 Jun 18 09:25:37.667 2019 Jun 18 09:25:38.014
40904 KAITUO 1A [+] 4.120 8.482E-04 0.022 0.056 12.759
43025 CZ-6 R/B [-] 4.480 2019 Jun 20 16:17:05.295 2019 Jun 20 16:17:05.687 2019 Jun 20 16:17:06.079
03890 NIMBUS 3 [-] 6.726 2.244E-03 0.029 0.057 13.658
01942 THOR ABLESTAR DEB [-] 7.207 2019 Jun 22 22:34:38.550 2019 Jun 22 22:34:38.916 2019 Jun 22 22:34:39.282
42793 CICERO 6 [+] 0.807 4.006E-04 0.042 0.062 15.143
43850 SHIELDS 1 [+] 0.869 2019 Jun 16 22:48:29.548 2019 Jun 16 22:48:29.878 2019 Jun 16 22:48:30.208
24841 IRIDIUM 16 [-] 1.688 6.934E-03 0.020 0.065 9.797
34765 IRIDIUM 33 DEB [-] 2.517 2019 Jun 18 06:31:23.880 2019 Jun 18 06:31:24.391 2019 Jun 18 06:31:24.901
28230 GP-B [-] 5.163 4.664E-04 0.033 0.067 14.083
30031 FENGYUN 1C DEB [-] 5.092 2019 Jun 21 06:19:38.931 2019 Jun 21 06:19:39.286 2019 Jun 21 06:19:39.641

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 Jun 16 17:43:21 UTC
Accessed 1 times since 2000 December 16
Current system time: 2019 Jun 17 00:47:29 UTC