SOCRATES

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Search parameters:

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


Data current as of 2018 May 22 00:06 UTC

Computation Interval: Start = 2018 May 22 00:00:00.000, Stop = 2018 May 29 00:00:00.000
Computation Threshold: 5.0 km
Considering: 4,241 Primaries, 16,973 Secondaries (24,097 Conjunctions)

See notes at bottom of page for data field descriptions

Bookmark this search (Top 10 by Minimum Range)

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)
43472 LONGJIANG 2 [-] 1.030 1.000E+00 0.000 0.000 0.000
43473 CZ-4C R/B [-] 1.030 2018 May 22 00:00:00.000 2018 May 22 00:00:00.000 2018 May 29 00:00:00.000
43471 LONGJIANG 1 [-] 1.030 1.000E+00 0.000 0.000 0.000
43472 LONGJIANG 2 [-] 1.030 2018 May 22 00:00:00.000 2018 May 22 00:00:00.000 2018 May 29 00:00:00.000
43470 QUEQIAO [-] 1.030 1.000E+00 0.000 0.000 0.000
43473 CZ-4C R/B [-] 1.030 2018 May 22 00:00:00.000 2018 May 22 00:00:00.000 2018 May 29 00:00:00.000
43470 QUEQIAO [-] 1.030 1.000E+00 0.000 0.000 0.000
43472 LONGJIANG 2 [-] 1.030 2018 May 22 00:00:00.000 2018 May 22 00:00:00.000 2018 May 29 00:00:00.000
43470 QUEQIAO [-] 1.030 1.000E+00 0.000 0.000 0.000
43471 LONGJIANG 1 [-] 1.030 2018 May 22 00:00:00.000 2018 May 22 00:00:00.000 2018 May 29 00:00:00.000
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)
43471 LONGJIANG 1 [-] 1.030 1.000E+00 0.000 0.000 0.000
43473 CZ-4C R/B [-] 1.030 2018 May 22 00:00:00.000 2018 May 22 00:00:00.000 2018 May 29 00:00:00.000
43118 CORVUS BC3 [+] 5.603 4.313E-03 0.008 0.032 0.002
43119 FLOCK 3P'-3 [+] 5.735 2018 May 24 23:18:21.653 2018 May 26 20:37:22.051 2018 May 28 13:08:16.354
42005 FLOCK 3P-45 [+] 2.416 3.096E-03 0.009 0.038 0.002
42024 FLOCK 3P-71 [+] 2.548 2018 May 23 16:46:54.313 2018 May 23 17:19:17.108 2018 May 23 20:08:16.809
08072 COSMOS 755 [?] 4.158 3.625E-03 0.025 0.046 14.083
42503 THORAD AGENA D DEB [-] 6.681 2018 May 26 00:43:07.229 2018 May 26 00:43:07.584 2018 May 26 00:43:07.939
16593 COSMOS 1732 [?] 1.881 6.856E-04 0.050 0.071 14.205
07051 DELTA 1 DEB [-] 2.080 2018 May 23 11:08:03.735 2018 May 23 11:08:04.087 2018 May 23 11:08:04.439

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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Format last updated: 2014 May 16
Current system time: 2018 May 22 03:54:50 UTC