SOCRATES

Search Results


Search parameters:

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


Data current as of 2021 May 12 08:06 UTC

Computation Interval: Start = 2021 May 12 00:00:00.000, Stop = 2021 May 19 00:00:00.000
Computation Threshold: 5.0 km
Considering: 6,932 Primaries, 20,793 Secondaries (50,827 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)
48042 ONEWEB-0115 [+] 1.722 7.333E-03 0.009 0.016 14.572
23344 RESURS O1 DEB [-] 1.920 2021 May 13 15:19:16.851 2021 May 13 15:19:17.194 2021 May 13 15:19:17.537
24954 FAISAT 2V [?] 1.152 1.935E-02 0.012 0.024 13.887
39957 COSMOS 1275 DEB [-] 1.694 2021 May 13 01:25:27.994 2021 May 13 01:25:28.354 2021 May 13 01:25:28.714
47313 PROMETHEUS 2-11 [+] 5.564 3.783E-03 0.011 0.025 13.373
32082 CBERS 1 DEB [-] 5.786 2021 May 17 11:15:11.894 2021 May 17 11:15:12.268 2021 May 17 11:15:12.642
47703 SPACEBEE-87 [+] 1.067 4.373E-03 0.008 0.031 0.000
47706 SPACEBEE-84 [+] 0.738 2021 May 12 05:24:02.994 2021 May 12 22:08:49.318 2021 May 13 14:44:08.081
25467 IRIDIUM 82 [-] 4.421 2.185E-02 0.013 0.031 13.570
44416 QUANTUM-RADAR 3 [+] 4.148 2021 May 16 07:59:08.552 2021 May 16 07:59:08.921 2021 May 16 07:59:09.289
47584 STARLINK-1988 [+] 2.444 3.687E-03 0.008 0.034 0.001
47601 STARLINK-2006 [+] 2.778 2021 May 14 14:31:48.402 2021 May 14 16:39:56.556 2021 May 14 19:12:27.921
25634 ARGOS [?] 2.589 3.746E-02 0.011 0.036 9.893
42380 NOAA 16 DEB [-] 2.436 2021 May 14 16:36:40.222 2021 May 14 16:36:40.728 2021 May 14 16:36:41.233
47980 STARLINK-2312 [+] 4.732 2.535E-03 0.010 0.041 0.001
47982 STARLINK-2317 [+] 4.399 2021 May 16 13:01:38.478 2021 May 16 15:34:15.210 2021 May 16 16:07:00.378
16191 METEOR 3-1 [?] 6.645 8.839E-04 0.031 0.051 14.149
15938 SCOUT G-1 R/B [-] 6.722 2021 May 18 13:06:23.332 2021 May 18 13:06:23.685 2021 May 18 13:06:24.038
43717 MOHAMMED VI-B [+] 2.560 8.813E-04 0.023 0.051 13.605
08756 SL-8 DEB [-] 3.031 2021 May 14 15:31:12.446 2021 May 14 15:31:12.813 2021 May 14 15:31:13.181

10 records found

Data Fields:
  • Action: The TLE Data button links to a page which provides the TLEs used to generate the associated prediction.
  • 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.