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 2019 Jan 17 08:06 UTC

Computation Interval: Start = 2019 Jan 17 00:00:00.000, Stop = 2019 Jan 24 00:00:00.000
Computation Threshold: 5.0 km
Considering: 4,537 Primaries, 17,247 Secondaries (25,866 Conjunctions)

See notes at bottom of page for data field descriptions

Re-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)
43759 OBJECT B [+] -0.185 1.579E-06 0.395 1.669 0.008
43787 OBJECT AF [+] 0.149 2019 Jan 17 00:00:00.000 2019 Jan 17 00:09:57.051 2019 Jan 17 00:21:59.916
43794 HAWK-B [+] -0.169 3.209E-07 1.069 3.037 0.003
43796 OBJECT AQ [+] -0.169 2019 Jan 17 00:00:00.000 2019 Jan 17 00:08:04.183 2019 Jan 17 00:18:50.644
43761 OBJECT D [+] -0.195 4.007E-07 0.844 3.080 0.006
43814 PW-SAT2 [+] 0.073 2019 Jan 17 00:00:00.000 2019 Jan 17 00:00:00.000 2019 Jan 17 00:07:40.452
43808 POLAR SCOUT YUKON [+] -0.177 1.297E-06 0.435 1.845 0.005
43817 SPACEBEE-5 [+] -0.110 2019 Jan 17 00:00:00.000 2019 Jan 17 00:12:50.457 2019 Jan 17 00:29:38.370
31698 TERRASAR-X [+] 0.545 2.199E-07 1.056 4.481 0.005
36605 TANDEM-X [+] 0.099 2019 Jan 17 00:00:00.000 2019 Jan 17 00:00:00.000 2019 Jan 17 00:16:14.745
24793 IRIDIUM 7 [-] 0.261 1.770E-05 0.583 2.388 4.134
24944 IRIDIUM 29 [-] 0.331 2019 Jan 17 00:00:01.830 2019 Jan 17 00:00:02.892 2019 Jan 17 00:00:03.955
31792 COSMOS 2428 [+] -0.152 1.474E-07 2.150 3.283 14.666
41364 NOAA 16 DEB [-] 2.878 2019 Jan 17 00:00:45.138 2019 Jan 17 00:00:45.395 2019 Jan 17 00:00:45.653
13736 OPS 9845 (DMSP 5D-2 F6) [-] 0.101 7.969E-08 2.895 4.509 14.744
20867 CZ-4 DEB [-] 0.063 2019 Jan 17 00:00:47.303 2019 Jan 17 00:00:47.450 2019 Jan 17 00:00:47.596
43802 SKYSAT-C13 [+] -0.190 2.698E-07 1.008 3.824 7.267
20673 COSMOS 886 DEB [-] 0.507 2019 Jan 17 00:02:12.561 2019 Jan 17 00:02:13.005 2019 Jan 17 00:02:13.448
43113 LEO VANTAGE 1 [+] 0.112 5.029E-07 1.202 1.722 14.610
33822 COSMOS 2251 DEB [-] 0.115 2019 Jan 17 00:02:34.728 2019 Jan 17 00:02:35.049 2019 Jan 17 00:02:35.371

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 Jan 17 09:34:27 UTC
Accessed 1 times since 2000 December 16
Current system time: 2019 Jan 17 11:44:38 UTC