SOCRATES

Search Results


Search parameters:

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


Data current as of 2020 May 27 00:05 UTC

Computation Interval: Start = 2020 May 27 00:00:00.000, Stop = 2020 Jun 03 00:00:00.000
Computation Threshold: 5.0 km
Considering: 5,401 Primaries, 18,601 Secondaries (31,785 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)
39057 COSMOS 2482 [+] 2.078 8.528E-03 0.007 0.017 12.414
21253 SL-8 DEB [-] 2.420 2020 May 28 12:23:51.462 2020 May 28 12:23:51.865 2020 May 28 12:23:52.268
20670 METEOR 2-19 [?] 6.272 1.346E-01 0.005 0.017 5.986
30170 FENGYUN 1C DEB [-] 8.337 2020 Jun 02 00:05:32.072 2020 Jun 02 00:05:32.907 2020 Jun 02 00:05:33.742
28895 CUBESAT XI-V [+] 4.257 7.179E-03 0.007 0.021 10.392
39624 SJ-11-06 [+] 4.542 2020 May 31 01:40:29.673 2020 May 31 01:40:30.154 2020 May 31 01:40:30.635
07827 COSMOS 738 [?] 5.881 5.412E-04 0.031 0.044 14.217
17728 THORAD DELTA 1 DEB [-] 6.964 2020 May 30 15:19:39.769 2020 May 30 15:19:40.121 2020 May 30 15:19:40.472
18940 COSMOS 1927 [?] 7.680 3.435E-04 0.039 0.056 14.294
05387 THORAD AGENA D DEB [-] 10.836 2020 Jun 02 16:36:27.023 2020 Jun 02 16:36:27.373 2020 Jun 02 16:36:27.723
27430 HAIYANG-1A [?] 4.481 5.285E-04 0.035 0.056 14.693
36944 COSMOS 1818 COOLANT [-] 6.028 2020 May 30 20:58:16.323 2020 May 30 20:58:16.664 2020 May 30 20:58:17.004
44873 CSG-1 [+] 0.284 1.091E-03 0.040 0.057 15.095
14552 SL-14 R/B [-] 0.492 2020 May 27 01:53:06.049 2020 May 27 01:53:06.380 2020 May 27 01:53:06.712
40073 DUMMY SAT [-] 6.660 7.523E-04 0.048 0.068 15.091
22287 SL-14 R/B [-] 7.443 2020 Jun 02 11:42:32.769 2020 Jun 02 11:42:33.100 2020 Jun 02 11:42:33.431
45149 ONEWEB-0043 [+] 1.559 2.589E-04 0.053 0.075 15.071
20564 ATLAS 28E DEB [-] 2.102 2020 May 28 01:24:55.579 2020 May 28 01:24:55.910 2020 May 28 01:24:56.242
03129 COSMOS 203 [?] 7.825 5.381E-03 0.021 0.080 6.859
12458 NOVA 1 [?] 5.521 2020 May 31 22:41:56.261 2020 May 31 22:41:56.990 2020 May 31 22:41:57.719

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: 2020 May 27 02:51:58 UTC
Accessed 1 times since 2000 December 16
Current system time: 2020 May 27 09:30:28 UTC