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 Feb 21 08:06 UTC

Computation Interval: Start = 2019 Feb 21 00:00:00.000, Stop = 2019 Feb 28 00:00:00.000
Computation Threshold: 5.0 km
Considering: 4,556 Primaries, 17,401 Secondaries (26,663 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)
43776 OBJECT U [+] 5.132 1.087E-02 0.005 0.020 0.000
43779 OBJECT X [+] 5.601 2019 Feb 21 00:00:00.000 2019 Feb 26 06:31:12.037 2019 Feb 28 00:00:00.000
31698 TERRASAR-X [+] 2.733 5.380E-03 0.007 0.029 0.000
36605 TANDEM-X [+] 2.953 2019 Feb 21 00:00:00.000 2019 Feb 22 13:31:06.536 2019 Feb 26 15:19:19.942
40015 HODOYOSHI-3 [+] -0.192 1.372E-03 0.022 0.034 14.992
37501 COSMOS 2251 DEB [-] 0.158 2019 Feb 21 00:17:35.625 2019 Feb 21 00:17:35.959 2019 Feb 21 00:17:36.292
43735 FLOCK 3R-16 [+] -0.051 2.693E-03 0.010 0.040 0.000
43736 FLOCK 3R-15 [+] -0.051 2019 Feb 21 00:00:00.000 2019 Feb 21 02:55:41.063 2019 Feb 22 03:41:57.889
43896 FLOCK 3K-6 [+] 4.340 2.406E-03 0.010 0.043 0.001
43897 OBJECT X [-] 4.143 2019 Feb 25 05:23:45.172 2019 Feb 25 07:33:04.713 2019 Feb 25 15:13:28.941
31113 HAIYANG-1B [+] 1.515 1.194E-03 0.019 0.045 13.253
03038 SL-8 DEB [-] 1.713 2019 Feb 22 15:05:37.676 2019 Feb 22 15:05:38.053 2019 Feb 22 15:05:38.430
43748 FLOCK 3R-2 [+] 6.324 1.545E-03 0.013 0.053 3.665
43405 CZ-2D DEB [-] 6.450 2019 Feb 27 09:24:32.512 2019 Feb 27 09:24:33.876 2019 Feb 27 09:24:35.240
18361 OSCAR 27 [?] 7.008 6.658E-04 0.014 0.054 7.151
10535 COSMOS 970 DEB [-] 6.988 2019 Feb 27 21:56:04.500 2019 Feb 27 21:56:05.199 2019 Feb 27 21:56:05.898
06323 COSMOS 540 [?] 2.820 1.303E-03 0.033 0.058 14.364
40794 COSMOS 2251 DEB [-] 4.155 2019 Feb 23 17:47:23.614 2019 Feb 23 17:47:23.962 2019 Feb 23 17:47:24.310
40059 OCO 2 [+] 0.289 9.443E-04 0.018 0.060 9.955
28956 SL-18 DEB [-] 0.558 2019 Feb 21 11:35:16.297 2019 Feb 21 11:35:16.800 2019 Feb 21 11:35:17.302

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 Feb 21 09:38:21 UTC
Accessed 1 times since 2000 December 16
Current system time: 2019 Feb 21 16:52:31 UTC