SOCRATES

Search Results


Search parameters:

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


Data current as of 2017 Feb 27 00:05 UTC

Computation Interval: Start = 2017 Feb 27 00:00:00.000, Stop = 2017 Mar 06 00:00:00.000
Computation Threshold: 5.0 km
Considering: 3,871 Primaries, 15,857 Secondaries (20,537 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)
41997 OBJECT BB [+] 3.952 7.022E-03 0.006 0.025 0.000
41998 OBJECT BC [+] 3.952 2017 Mar 01 20:14:40.862 2017 Mar 02 19:05:11.461 2017 Mar 03 16:50:06.872
22827 HEALTHSAT 1 [-] 5.254 2.752E-04 0.033 0.057 14.480
13474 COSMOS 1275 DEB [-] 5.389 2017 Mar 03 05:34:23.423 2017 Mar 03 05:34:23.769 2017 Mar 03 05:34:24.114
41987 OBJECT AR [+] 3.959 1.127E-03 0.015 0.063 0.000
41989 OBJECT AT [+] 3.959 2017 Mar 02 09:57:12.705 2017 Mar 02 19:16:50.656 2017 Mar 03 03:38:05.463
06659 METEOR 1-15 [?] 2.454 3.027E-03 0.053 0.076 14.825
30746 FENGYUN 1C DEB [-] 1.871 2017 Feb 28 16:22:42.454 2017 Feb 28 16:22:42.791 2017 Feb 28 16:22:43.128
41991 OBJECT AV [+] 6.461 6.805E-04 0.020 0.077 6.794
29104 PSLV DEB [-] 7.073 2017 Mar 05 07:19:12.143 2017 Mar 05 07:19:12.879 2017 Mar 05 07:19:13.615
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)
41962 OBJECT Q [+] 3.573 5.524E-04 0.021 0.089 0.000
41964 OBJECT S [+] 3.639 2017 Mar 01 20:15:22.439 2017 Mar 02 10:03:44.150 2017 Mar 02 20:07:22.032
40340 YAOGAN 25C [+] 5.288 3.502E-04 0.033 0.090 12.145
05876 THOR ABLESTAR DEB [-] 6.119 2017 Mar 04 00:44:44.657 2017 Mar 04 00:44:45.069 2017 Mar 04 00:44:45.480
21033 COSMOS 2119 [?] 6.979 2.716E-04 0.041 0.098 12.550
21729 COSMOS 2158 [?] 6.058 2017 Mar 04 21:33:02.567 2017 Mar 04 21:33:02.966 2017 Mar 04 21:33:03.364
35933 BEESAT [+] 1.010 3.162E-04 0.033 0.101 10.922
39855 SL-16 DEB [-] 2.282 2017 Feb 27 20:13:16.641 2017 Feb 27 20:13:17.099 2017 Feb 27 20:13:17.556
41987 OBJECT AR [+] 0.414 3.752E-04 0.026 0.108 0.001
41988 OBJECT AS [+] 0.414 2017 Feb 27 00:00:00.000 2017 Feb 27 06:12:06.025 2017 Feb 27 13:21:48.139

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: 2017 February 27 08:55:34 UTC