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 Jun 17 16:06 UTC

Computation Interval: Start = 2019 Jun 17 12:00:00.000, Stop = 2019 Jun 24 12:00:00.000
Computation Threshold: 5.0 km
Considering: 4,690 Primaries, 17,473 Secondaries (28,768 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)
10936 COSMOS 1019 [?] 7.632 2.517E-03 0.011 0.027 12.086
07019 DELTA 1 DEB [-] 7.531 2019 Jun 24 10:47:11.597 2019 Jun 24 10:47:12.011 2019 Jun 24 10:47:12.424
21397 OKEAN-3 [?] 0.979 2.604E-02 0.017 0.030 14.683
35661 COSMOS 2251 DEB [-] 1.154 2019 Jun 18 02:58:53.812 2019 Jun 18 02:58:54.152 2019 Jun 18 02:58:54.493
42014 FLOCK 3P-54 [+] 6.150 2.798E-03 0.009 0.040 0.987
43038 CZ-2D DEB [-] 6.512 2019 Jun 22 23:12:28.640 2019 Jun 22 23:12:33.704 2019 Jun 22 23:12:38.768
40045 AEROCUBE 6A [+] 3.540 1.282E-03 0.037 0.052 15.146
15332 SL-14 R/B [-] 3.517 2019 Jun 20 17:59:10.013 2019 Jun 20 17:59:10.344 2019 Jun 20 17:59:10.674
20103 NADEZHDA 1 [-] 2.479 4.858E-03 0.016 0.067 1.117
16511 SL-8 R/B [-] 2.408 2019 Jun 19 05:26:56.565 2019 Jun 19 05:27:01.039 2019 Jun 19 05:27:05.514
14240 COSMOS 1486 [?] 1.256 8.568E-04 0.043 0.068 14.684
41521 NOAA 16 DEB [-] 1.925 2019 Jun 18 02:24:38.696 2019 Jun 18 02:24:39.036 2019 Jun 18 02:24:39.377
16495 COSMOS 1726 [?] 1.333 2.517E-04 0.054 0.076 15.250
42042 FLOCK 3P-56 [+] 1.389 2019 Jun 18 03:51:39.153 2019 Jun 18 03:51:39.481 2019 Jun 18 03:51:39.809
22184 COSMOS 2213 [?] 6.935 2.398E-03 0.026 0.083 10.049
01589 SL-8 R/B [-] 6.591 2019 Jun 23 11:22:29.671 2019 Jun 23 11:22:30.169 2019 Jun 23 11:22:30.666
42962 IRIDIUM 136 [+] 3.335 2.304E-04 0.054 0.084 14.705
28333 DMSP 5D-2 F11 DEB [-] 3.926 2019 Jun 20 20:25:36.439 2019 Jun 20 20:25:36.779 2019 Jun 20 20:25:37.119
33321 HUANJING 1B (HJ-1B) [+] 2.726 2.663E-04 0.045 0.086 14.232
24138 PEGASUS DEB [-] 3.300 2019 Jun 20 03:19:33.538 2019 Jun 20 03:19:33.889 2019 Jun 20 03:19:34.240

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 Jun 17 17:42:18 UTC
Accessed 1 times since 2000 December 16
Current system time: 2019 Jun 18 01:11:10 UTC