SOCRATES

Search Results


Search parameters:

  • Name(s): Top 10 by Time In
  • Order by Start Time
  • 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, 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)
43042 AEROCUBE 7B (OCSD B) [+] 0.105 4.022E-07 0.782 3.312 0.004
43043 AEROCUBE 7C (OCSD C) [+] 0.234 2019 Aug 25 00:00:00.000 2019 Aug 25 00:56:14.615 2019 Aug 27 14:13:36.005
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
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
44207 TIANHUI 2-01A [+] 0.169 8.585E-05 0.054 0.223 0.001
44209 TIANHUI 2-01B [+] 0.493 2019 Aug 25 00:00:00.000 2019 Aug 25 09:40:32.220 2019 Sep 01 00:00:00.000
25544 ISS (ZARYA) [+] -0.172 1.288E-04 0.340 1.442 0.002
44069 SOYUZ-MS 12 [+] 0.448 2019 Aug 25 00:00:00.000 2019 Aug 25 00:03:49.501 2019 Aug 26 01:26:49.310
31698 TERRASAR-X [+] 2.293 6.507E-05 0.065 0.245 0.001
36605 TANDEM-X [+] 2.290 2019 Aug 25 00:00:00.000 2019 Aug 27 00:16:55.975 2019 Sep 01 00:00:00.000
39191 O3B PFM [+] 0.849 4.275E-07 0.824 2.955 0.002
43234 O3B FM13 [+] 2.848 2019 Aug 25 00:00:00.000 2019 Aug 25 00:16:38.201 2019 Aug 25 00:49:18.823
11573 COSMOS 1140 [?] 0.366 1.114E-06 0.881 2.515 11.715
21529 SCOUT G-1 DEB [-] 0.084 2019 Aug 25 00:00:56.991 2019 Aug 25 00:00:57.360 2019 Aug 25 00:00:57.729
05705 COSMOS 468 [?] 0.129 7.119E-07 0.930 3.732 5.119
37460 FENGYUN 1C DEB [-] 0.622 2019 Aug 25 00:02:31.884 2019 Aug 25 00:02:32.534 2019 Aug 25 00:02:33.185

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 10:31:42 UTC