SOCRATES

Search Results


Search parameters:

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


Data current as of 2019 Aug 25 08:06 UTC

Computation Interval: Start = 2019 Aug 25 00:00:00.000, Stop = 2019 Sep 01 00:00:00.000
Computation Threshold: 5.0 km
Considering: 4,816 Primaries, 17,657 Secondaries (28,402 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)
44069 SOYUZ-MS 12 [+] 0.445 1.000E+00 0.000 0.000 0.000
44455 PROGRESS-MS 12 [+] 0.445 2019 Aug 25 00:00:00.000 2019 Aug 25 00:00:00.000 2019 Sep 01 00:00:00.000
44069 SOYUZ-MS 12 [+] 0.445 1.000E+00 0.000 0.000 0.000
44437 SOYUZ-MS 13 [+] 0.445 2019 Aug 25 00:00:00.000 2019 Aug 25 00:00:00.000 2019 Sep 01 00:00:00.000
44069 SOYUZ-MS 12 [+] 0.445 1.000E+00 0.000 0.000 0.000
44446 DRAGON CRS-18 [+] 0.445 2019 Aug 25 00:00:00.000 2019 Aug 25 00:00:00.000 2019 Sep 01 00:00:00.000
02874 OPS 5712 (P/L 153) [+] 5.312 7.721E-04 0.030 0.046 14.602
31776 FENGYUN 1C DEB [-] 10.037 2019 Aug 30 05:34:13.455 2019 Aug 30 05:34:13.798 2019 Aug 30 05:34:14.140
24907 IRIDIUM 22 [-] 6.296 1.426E-02 0.012 0.050 4.111
43254 IRIDIUM 146 [+] 6.018 2019 Aug 30 23:12:07.283 2019 Aug 30 23:12:08.499 2019 Aug 30 23:12:09.715
21574 ERS-1 [-] 5.945 8.185E-03 0.043 0.064 14.915
39707 SL-16 DEB [-] 6.716 2019 Aug 30 18:38:31.752 2019 Aug 30 18:38:32.087 2019 Aug 30 18:38:32.422
13271 COSMOS 1378 [?] 3.235 3.555E-04 0.045 0.064 15.235
43130 ARKYD 6A [+] 3.500 2019 Aug 28 09:33:34.755 2019 Aug 28 09:33:35.083 2019 Aug 28 09:33:35.411
43887 LEMUR-2-NATALIEMURRAY [+] 6.230 8.207E-04 0.019 0.068 8.433
37521 COSMOS 2251 DEB [-] 6.037 2019 Aug 30 23:28:53.899 2019 Aug 30 23:28:54.492 2019 Aug 30 23:28:55.085
36827 PRISMA (TANGO) [?] 0.331 4.972E-04 0.025 0.083 10.114
40263 CZ-2C DEB [-] 0.394 2019 Aug 25 05:08:30.372 2019 Aug 25 05:08:30.867 2019 Aug 25 05:08:31.361
44225 AFOTEC-1 (FALCON ODE) [+] 2.689 2.877E-04 0.042 0.085 14.270
32344 FENGYUN 1C DEB [-] 3.841 2019 Aug 27 05:44:29.322 2019 Aug 27 05:44:29.672 2019 Aug 27 05:44:30.023

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: 2019 Aug 25 09:45:07 UTC
Accessed 1 times since 2000 December 16
Current system time: 2019 Aug 25 09:54:49 UTC