SOCRATES

Search Results


Search parameters:

  • Name(s): Top 10 by Time In
  • Order by Start Time
  • Return first 10 items


Data current as of 2021 Apr 14 00:06 UTC

Computation Interval: Start = 2021 Apr 14 00:00:00.000, Stop = 2021 Apr 21 00:00:00.000
Computation Threshold: 5.0 km
Considering: 4,699 Primaries, 20,613 Secondaries (32,565 Conjunctions)

See notes at bottom of page for data field descriptions

Re-sort results by Maximum Probability, Minimum Range.

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)
43187 S-NET B [+] 0.952 9.198E-03 0.005 0.022 0.005
43188 S-NET A [+] 1.287 2021 Apr 14 00:00:00.000 2021 Apr 14 00:08:27.802 2021 Apr 14 00:30:29.390
43234 O3B FM13 [+] 1.577 4.407E-07 0.820 2.881 0.002
44113 O3B FM19 [+] 1.577 2021 Apr 14 00:00:00.000 2021 Apr 14 00:17:14.860 2021 Apr 14 00:50:39.422
44207 TIANHUI 2-01A [+] 0.941 9.428E-04 0.017 0.065 0.000
44209 TIANHUI 2-01B [+] 0.918 2021 Apr 14 00:00:00.000 2021 Apr 14 16:18:56.974 2021 Apr 17 02:38:11.578
31698 TERRASAR-X [+] 0.218 3.400E-05 0.086 0.358 0.000
36605 TANDEM-X [+] 0.196 2021 Apr 14 00:00:00.000 2021 Apr 14 00:00:00.000 2021 Apr 16 02:58:40.707
42769 CE-SAT-I [+] 0.845 1.631E-07 1.533 4.163 12.389
44249 STARLINK-61 [+] 0.837 2021 Apr 14 00:00:01.516 2021 Apr 14 00:00:01.740 2021 Apr 14 00:00:01.964
13377 COSMOS 1390 [?] 1.506 1.680E-06 0.329 1.348 3.966
10392 THORAD DELTA 1 DEB [-] 2.019 2021 Apr 14 00:00:08.684 2021 Apr 14 00:00:09.898 2021 Apr 14 00:00:11.112
43895 FLOCK 3K-2 [+] 0.820 2.152E-07 1.793 2.696 15.141
46833 NUSAT-13 (EMMY) [+] 0.233 2021 Apr 14 00:00:15.718 2021 Apr 14 00:00:15.996 2021 Apr 14 00:00:16.274
43768 AISTECHSAT 2 [+] 0.825 2.987E-07 1.343 2.595 14.297
00318 THOR ABLESTAR DEB [-] 1.965 2021 Apr 14 00:00:23.117 2021 Apr 14 00:00:23.416 2021 Apr 14 00:00:23.714
07209 METEOR 1-16 [?] 0.761 7.163E-06 0.943 1.814 14.212
29734 FENGYUN 1C DEB [-] 1.149 2021 Apr 14 00:00:30.444 2021 Apr 14 00:00:30.772 2021 Apr 14 00:00:31.099
26536 NOAA 16 [-] 0.266 6.433E-06 0.533 2.218 3.038
29766 FENGYUN 1C DEB [-] 1.098 2021 Apr 14 00:00:45.405 2021 Apr 14 00:00:46.881 2021 Apr 14 00:00:48.356

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.