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 Oct 01 08:06 UTC

Computation Interval: Start = 2020 Oct 01 00:00:00.000, Stop = 2020 Oct 08 00:00:00.000
Computation Threshold: 5.0 km
Considering: 5,761 Primaries, 19,360 Secondaries (38,507 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)
44421 COSMOS 2535 [+] 0.417 1.000E+00 0.000 0.000 0.000
44424 COSMOS 2536 [+] 0.417 2020 Oct 01 00:00:00.000 2020 Oct 01 07:06:55.572 2020 Oct 08 00:00:00.000
43131 MICROMAS-2A [+] 6.392 2.624E-02 0.005 0.008 15.096
43898 OBJECT Y [-] 6.146 2020 Oct 07 07:44:20.820 2020 Oct 07 07:44:21.151 2020 Oct 07 07:44:21.482
12112 COSMOS 1233 [?] 2.005 1.171E-03 0.018 0.034 13.531
45283 SL-14 DEB [-] 2.040 2020 Oct 02 22:33:12.607 2020 Oct 02 22:33:12.976 2020 Oct 02 22:33:13.346
46302 SPACEBEE-15 [+] 6.108 3.244E-03 0.009 0.037 0.000
46304 SPACEBEE-18 [+] 6.108 2020 Oct 05 01:30:49.675 2020 Oct 07 01:45:22.557 2020 Oct 08 00:00:00.000
41922 IRIDIUM 104 [+] 6.513 9.078E-04 0.025 0.046 14.219
34477 COSMOS 2251 DEB [-] 6.911 2020 Oct 07 11:32:18.223 2020 Oct 07 11:32:18.575 2020 Oct 07 11:32:18.927
44393 D-STAR ONE (LIGHTSAT) [+] 3.624 5.942E-04 0.034 0.051 15.035
36495 IRIDIUM 33 DEB [-] 3.631 2020 Oct 04 12:43:34.111 2020 Oct 04 12:43:34.444 2020 Oct 04 12:43:34.776
17566 COSMOS 1825 [?] 6.253 3.929E-04 0.043 0.061 15.220
43120 FLOCK 3P'-2 [+] 6.470 2020 Oct 07 05:59:04.963 2020 Oct 07 05:59:05.292 2020 Oct 07 05:59:05.620
45066 STARLINK-1145 [+] 4.420 6.898E-04 0.023 0.065 12.122
45557 STARLINK-1336 [+] 4.337 2020 Oct 05 08:04:43.438 2020 Oct 05 08:04:43.850 2020 Oct 05 08:04:44.263
45059 STARLINK-1165 [+] 3.394 9.396E-04 0.017 0.066 6.506
46497 OBJECT M [-] 3.367 2020 Oct 04 07:27:30.688 2020 Oct 04 07:27:31.456 2020 Oct 04 07:27:32.225
46305 SPACEBEE-10 [+] 5.183 9.831E-04 0.016 0.066 0.000
46308 SPACEBEE-16 [+] 5.249 2020 Oct 05 02:31:05.660 2020 Oct 06 03:32:13.958 2020 Oct 07 01:15:59.845

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 Oct 01 11:30:49 UTC
Accessed 1 times since 2000 December 16
Current system time: 2020 Oct 01 13:04:14 UTC