SOCRATES

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Search parameters:

  • Name(s): Top 10 by Time In
  • Order by Start Time
  • Return first 10 items


Data current as of 2018 Jan 17 16:06 UTC

Computation Interval: Start = 2018 Jan 17 12:00:00.000, Stop = 2018 Jan 24 12:00:00.000
Computation Threshold: 5.0 km
Considering: 4,191 Primaries, 16,815 Secondaries (23,840 Conjunctions)

See notes at bottom of page for data field descriptions

Bookmark this search (Top 10 by Time In)

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)
42777 COMPASS 2 [+] 3.698 9.467E-03 0.005 0.021 0.000
43117 OBJECT G [+] 2.843 2018 Jan 17 12:00:00.000 2018 Jan 20 07:27:54.665 2018 Jan 24 12:00:00.000
42022 FLOCK 3P-59 [+] 0.070 1.183E-05 0.145 0.608 0.001
42045 FLOCK 3P-29 [+] 0.727 2018 Jan 17 12:00:00.000 2018 Jan 17 12:43:49.474 2018 Jan 17 16:37:25.139
42792 ROBUSTA-1B [+] 0.706 4.172E-05 0.077 0.325 0.000
43151 OBJECT AL [-] 1.298 2018 Jan 17 12:00:00.000 2018 Jan 17 12:19:54.641 2018 Jan 24 12:00:00.000
43127 OBJECT S [+] 0.629 1.687E-01 0.001 0.004 0.000
43130 OBJECT V [+] 0.037 2018 Jan 17 12:00:00.000 2018 Jan 17 13:36:33.902 2018 Jan 21 10:30:15.636
40076 TDS 1 [+] 0.136 7.170E-08 3.070 4.727 14.954
31149 FENGYUN 1C DEB [-] 0.716 2018 Jan 17 12:00:25.908 2018 Jan 17 12:00:26.017 2018 Jan 17 12:00:26.126
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)
00716 TIROS 8 [-] -0.016 1.240E-07 1.504 4.603 11.128
31123 SL-24 R/B [-] 0.606 2018 Jan 17 12:00:26.432 2018 Jan 17 12:00:26.607 2018 Jan 17 12:00:26.783
18822 DMSP 5D-2 F9 (USA 29) [-] 0.822 6.029E-07 0.747 2.310 10.779
26283 CZ-4B DEB [-] 0.030 2018 Jan 17 12:01:01.778 2018 Jan 17 12:01:02.189 2018 Jan 17 12:01:02.601
42849 OBJECT AA [+] 0.329 1.038E-07 2.519 3.973 14.893
33629 FENGYUN 1C DEB [-] 3.996 2018 Jan 17 12:01:29.640 2018 Jan 17 12:01:29.844 2018 Jan 17 12:01:30.048
33061 ORBCOMM FM41 [-] 0.638 1.182E-06 0.885 2.360 12.416
22627 SL-14 R/B [-] 0.312 2018 Jan 17 12:01:30.848 2018 Jan 17 12:01:31.203 2018 Jan 17 12:01:31.558
00876 COSMOS 44 [?] 0.030 3.216E-07 0.875 3.699 1.234
15033 SL-8 DEB [-] 1.048 2018 Jan 17 12:01:35.846 2018 Jan 17 12:01:38.573 2018 Jan 17 12:01:41.300

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: 2018 January 17 22:02:34 UTC