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 May 23 08:06 UTC

Computation Interval: Start = 2019 May 23 00:00:00.000, Stop = 2019 May 30 00:00:00.000
Computation Threshold: 5.0 km
Considering: 4,619 Primaries, 17,405 Secondaries (27,597 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)
43756 SOYUZ-MS 11 [+] 0.509 1.000E+00 0.000 0.000 0.000
44222 DRAGON CRS-17 [+] 0.509 2019 May 23 00:00:00.000 2019 May 23 00:00:00.000 2019 May 30 00:00:00.000
43702 PROGRESS-MS 10 [+] 0.509 1.000E+00 0.000 0.000 0.000
44222 DRAGON CRS-17 [+] 0.509 2019 May 23 00:00:00.000 2019 May 23 00:00:00.000 2019 May 30 00:00:00.000
44069 SOYUZ-MS 12 [+] 0.509 1.000E+00 0.000 0.000 0.000
44222 DRAGON CRS-17 [+] 0.509 2019 May 23 00:00:00.000 2019 May 23 00:00:00.000 2019 May 30 00:00:00.000
44188 CYGNUS NG-11 [+] 0.509 1.000E+00 0.000 0.000 0.000
44222 DRAGON CRS-17 [+] 0.509 2019 May 23 00:00:00.000 2019 May 23 00:00:00.000 2019 May 30 00:00:00.000
44110 PROGRESS-MS 11 [+] 0.509 1.000E+00 0.000 0.000 0.000
44222 DRAGON CRS-17 [+] 0.509 2019 May 23 00:00:00.000 2019 May 23 00:00:00.000 2019 May 30 00:00:00.000
25544 ISS (ZARYA) [+] -0.204 2.909E-04 0.226 0.959 0.001
44222 DRAGON CRS-17 [+] 0.509 2019 May 23 00:00:00.000 2019 May 23 00:00:00.000 2019 May 25 02:58:26.926
31698 TERRASAR-X [+] 0.828 4.804E-07 0.714 3.031 0.004
36605 TANDEM-X [+] -0.091 2019 May 23 00:00:00.000 2019 May 23 00:11:45.075 2019 May 23 00:44:08.699
35636 STERKH 1 [-] 0.312 4.016E-06 0.251 1.032 3.833
30304 FENGYUN 1C DEB [-] 0.523 2019 May 23 00:00:03.472 2019 May 23 00:00:04.748 2019 May 23 00:00:06.025
05238 COSMOS 422 [?] 0.465 2.110E-07 2.248 4.470 13.772
31567 FENGYUN 1C DEB [-] 0.493 2019 May 23 00:00:52.425 2019 May 23 00:00:52.588 2019 May 23 00:00:52.750
10967 SEASAT 1 [-] 0.480 5.584E-06 1.598 4.783 11.242
27880 OV1-5 DEB [-] 0.043 2019 May 23 00:01:07.316 2019 May 23 00:01:07.445 2019 May 23 00:01:07.575

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 May 23 09:35:41 UTC
Accessed 1 times since 2000 December 16
Current system time: 2019 May 23 11:54:09 UTC