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 Mar 27 00:06 UTC

Computation Interval: Start = 2019 Mar 27 00:00:00.000, Stop = 2019 Apr 03 00:00:00.000
Computation Threshold: 5.0 km
Considering: 4,555 Primaries, 17,361 Secondaries (26,585 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)
42827 OBJECT C [+] 0.338 8.141E-08 2.900 4.402 15.001
43767 CORVUS-BC 4 [+] 0.165 2019 Mar 27 00:00:12.046 2019 Mar 27 00:00:12.204 2019 Mar 27 00:00:12.362
18940 COSMOS 1927 [?] 1.262 1.269E-07 1.311 4.482 8.956
08563 THORAD DELTA 1 DEB [-] 1.019 2019 Mar 27 00:00:14.568 2019 Mar 27 00:00:14.815 2019 Mar 27 00:00:15.063
40958 LQSAT [-] 0.190 1.509E-07 1.870 3.688 14.126
34976 COSMOS 2251 DEB [-] 0.715 2019 Mar 27 00:00:35.738 2019 Mar 27 00:00:35.977 2019 Mar 27 00:00:36.216
43574 IRIDIUM 154 [+] 0.461 5.822E-07 1.117 1.600 14.935
30954 FENGYUN 1C DEB [-] 1.553 2019 Mar 27 00:01:12.388 2019 Mar 27 00:01:12.705 2019 Mar 27 00:01:13.022
01510 DODECAPOLE 2 [?] 0.159 6.373E-06 0.750 3.130 2.743
35747 IRIDIUM 33 DEB [-] 5.974 2019 Mar 27 00:01:34.884 2019 Mar 27 00:01:36.305 2019 Mar 27 00:01:37.727
40286 SJ-11-08 [+] 0.161 1.909E-07 1.165 4.680 5.107
38221 COSMOS 2251 DEB [-] 1.865 2019 Mar 27 00:01:39.230 2019 Mar 27 00:01:39.575 2019 Mar 27 00:01:39.920
43642 YAOGAN-32 A [+] 0.156 1.566E-07 1.420 4.678 10.042
42570 DELTA 1 DEB [-] 0.633 2019 Mar 27 00:01:45.227 2019 Mar 27 00:01:45.403 2019 Mar 27 00:01:45.578
42947 YAOGAN-30 C [+] 0.221 1.489E-07 1.623 4.307 12.522
43765 HAWK-A [+] 0.809 2019 Mar 27 00:01:49.862 2019 Mar 27 00:01:50.065 2019 Mar 27 00:01:50.268
29052 FORMOSAT-3 FM2 [+] 1.102 2.325E-07 1.251 3.577 11.637
31620 FENGYUN 1C DEB [-] 3.725 2019 Mar 27 00:02:00.410 2019 Mar 27 00:02:00.710 2019 Mar 27 00:02:01.011
10961 COSMOS 1023 [?] 0.444 6.926E-07 1.445 2.468 14.493
42959 IRIDIUM 119 [+] 0.497 2019 Mar 27 00:02:18.479 2019 Mar 27 00:02:18.779 2019 Mar 27 00:02:19.079

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 Mar 27 01:37:24 UTC
Accessed 1 times since 2000 December 16
Current system time: 2019 Mar 27 03:16:54 UTC