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 Jan 26 08:07 UTC

Computation Interval: Start = 2020 Jan 26 00:00:00.000, Stop = 2020 Feb 02 00:00:00.000
Computation Threshold: 5.0 km
Considering: 5,055 Primaries, 18,154 Secondaries (30,957 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)
43485 LUOJIA-1 01 [+] 0.910 1.555E-01 0.003 0.005 15.083
18153 SL-14 R/B [-] 1.287 2020 Jan 27 02:59:09.883 2020 Jan 27 02:59:10.215 2020 Jan 27 02:59:10.546
42001 FLOCK 3P-49 [+] 3.983 1.169E-02 0.005 0.019 0.016
42010 FLOCK 3P-40 [+] 4.705 2020 Jan 30 02:59:38.724 2020 Jan 30 03:04:54.771 2020 Jan 30 03:10:10.794
41783 PRATHAM [-] 3.266 1.547E-03 0.018 0.037 13.851
34868 IRIDIUM 33 DEB [-] 2.666 2020 Jan 28 16:57:21.302 2020 Jan 28 16:57:21.663 2020 Jan 28 16:57:22.024
43643 YAOGAN-32 B [+] 4.060 8.750E-04 0.019 0.061 10.674
33806 COSMOS 2251 DEB [-] 4.821 2020 Jan 30 05:53:10.525 2020 Jan 30 05:53:10.994 2020 Jan 30 05:53:11.462
22802 COSMOS 2263 [?] 1.967 9.271E-04 0.018 0.062 9.202
37623 CZ-4 DEB [-] 2.248 2020 Jan 27 12:05:59.337 2020 Jan 27 12:05:59.880 2020 Jan 27 12:06:00.423
41332 KMS 4 [+] 1.679 8.221E-04 0.019 0.066 9.390
43422 GAOFEN 8 DEB [-] 2.393 2020 Jan 27 12:40:50.441 2020 Jan 27 12:40:50.973 2020 Jan 27 12:40:51.506
11750 COSMOS 1171 [?] 3.822 1.000E-03 0.016 0.066 2.513
05052 SL-8 DEB [-] 3.748 2020 Jan 29 08:36:09.078 2020 Jan 29 08:36:11.067 2020 Jan 29 08:36:13.056
15031 COSMOS 1570 [?] 1.129 1.485E-03 0.024 0.069 11.747
35771 COSMOS 2251 DEB [-] 1.466 2020 Jan 26 17:46:37.317 2020 Jan 26 17:46:37.743 2020 Jan 26 17:46:38.168
09903 METEOR 1-27 [?] 7.194 3.882E-03 0.042 0.074 14.394
37435 FENGYUN 1C DEB [-] 9.363 2020 Feb 01 18:04:07.530 2020 Feb 01 18:04:07.877 2020 Feb 01 18:04:08.225
42810 IRIDIUM 124 [+] 1.447 2.418E-04 0.055 0.079 14.935
12204 DELTA 1 DEB [-] 1.445 2020 Jan 26 23:47:59.730 2020 Jan 26 23:48:00.064 2020 Jan 26 23:48:00.399

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 Jan 26 09:49:17 UTC
Accessed 1 times since 2000 December 16
Current system time: 2020 Jan 26 14:31:46 UTC