SOCRATES

Search Results


Search parameters:

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


Data current as of 2018 Aug 16 00:05 UTC

Computation Interval: Start = 2018 Aug 16 00:00:00.000, Stop = 2018 Aug 23 00:00:00.000
Computation Threshold: 5.0 km
Considering: 4,275 Primaries, 17,045 Secondaries (24,469 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)
27600 MICRO LABSAT [-] 3.466 4.441E-03 0.008 0.031 3.576
39715 SL-16 DEB [-] 4.580 2018 Aug 18 21:33:52.690 2018 Aug 18 21:33:54.088 2018 Aug 18 21:33:55.487
06206 COSMOS 521 [?] 5.349 6.740E-03 0.012 0.051 2.553
20804 COSMOS 2100 [?] 6.362 2018 Aug 21 05:44:57.129 2018 Aug 21 05:44:59.087 2018 Aug 21 05:45:01.045
24883 ORBVIEW 2 (SEASTAR) [-] 6.201 1.931E-02 0.046 0.068 14.856
25169 IRIDIUM 52 [+] 6.674 2018 Aug 22 01:38:18.733 2018 Aug 22 01:38:19.070 2018 Aug 22 01:38:19.406
42957 IRIDIUM 122 [+] 3.155 7.171E-04 0.021 0.068 10.602
30951 FENGYUN 1C DEB [-] 3.236 2018 Aug 18 11:26:09.314 2018 Aug 18 11:26:09.785 2018 Aug 18 11:26:10.257
23814 REX 2 [?] 6.715 2.144E-04 0.047 0.069 14.845
39979 SL-14 DEB [-] 8.010 2018 Aug 21 12:58:52.765 2018 Aug 21 12:58:53.102 2018 Aug 21 12:58:53.439
26069 COSMOS 2369 [?] 6.707 6.977E-04 0.019 0.078 4.885
22379 SL-16 DEB [-] 6.815 2018 Aug 21 15:45:20.598 2018 Aug 21 15:45:21.622 2018 Aug 21 15:45:22.645
40036 FLOCK 1C-6 [P] 2.845 5.126E-04 0.058 0.083 15.115
16496 SL-14 R/B [-] 3.289 2018 Aug 18 04:45:36.946 2018 Aug 18 04:45:37.277 2018 Aug 18 04:45:37.608
40935 LEMUR-2-PETER [+] 2.254 4.660E-04 0.026 0.087 9.523
13030 SL-8 DEB [-] 1.611 2018 Aug 16 08:18:47.007 2018 Aug 16 08:18:47.532 2018 Aug 16 08:18:48.057
25043 IRIDIUM 38 [-] 6.882 3.005E-03 0.033 0.090 12.020
31768 FENGYUN 1C DEB [-] 6.994 2018 Aug 22 09:01:12.618 2018 Aug 22 09:01:13.034 2018 Aug 22 09:01:13.450
40054 AISAT [-] 1.034 3.862E-04 0.028 0.095 9.777
38346 H-2A DEB [-] 1.839 2018 Aug 16 22:03:06.038 2018 Aug 16 22:03:06.550 2018 Aug 16 22:03:07.061

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: 2018 Aug 16 01:30:26 UTC
Accessed 1 times since 2000 December 16
Current system time: 2018 Aug 16 02:15:28 UTC