SOCRATES

Search Results


Search parameters:

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


Data current as of 2020 Aug 09 00:06 UTC

Computation Interval: Start = 2020 Aug 09 00:00:00.000, Stop = 2020 Aug 16 00:00:00.000
Computation Threshold: 5.0 km
Considering: 5,544 Primaries, 18,995 Secondaries (34,519 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)
45476 SOYUZ-MS 16 [+] 0.464 1.000E+00 0.000 0.000 0.000
45937 PROGRESS-MS 15 [+] 0.464 2020 Aug 09 00:00:00.000 2020 Aug 09 00:00:00.000 2020 Aug 16 00:00:00.000
45595 PROGRESS-MS 14 [+] 0.464 1.000E+00 0.000 0.000 0.000
45937 PROGRESS-MS 15 [+] 0.464 2020 Aug 09 00:00:00.000 2020 Aug 09 00:00:00.000 2020 Aug 16 00:00:00.000
45607 HTV-9 (KOUNOTORI 9) [+] 0.464 1.000E+00 0.000 0.000 0.000
45937 PROGRESS-MS 15 [+] 0.464 2020 Aug 09 00:00:00.000 2020 Aug 09 00:00:00.000 2020 Aug 16 00:00:00.000
25544 ISS (ZARYA) [+] 0.153 2.685E-04 0.235 0.998 0.001
45937 PROGRESS-MS 15 [+] 0.482 2020 Aug 09 00:00:00.000 2020 Aug 09 00:25:56.690 2020 Aug 12 00:11:35.472
26824 INTELSAT 901 (IS-901) [+] 0.750 1.000E+00 0.000 0.000 0.000
44625 MEV-1 [+] 0.750 2020 Aug 09 00:00:00.000 2020 Aug 09 00:00:00.000 2020 Aug 16 00:00:00.000
31698 TERRASAR-X [+] 0.541 4.231E-05 0.079 0.312 0.001
36605 TANDEM-X [+] 0.540 2020 Aug 09 00:00:00.000 2020 Aug 09 00:41:02.061 2020 Aug 14 04:56:00.186
44207 TIANHUI 2-01A [+] 3.709 1.893E-04 0.036 0.152 0.001
44209 TIANHUI 2-01B [+] 3.659 2020 Aug 09 00:00:00.000 2020 Aug 12 11:33:54.637 2020 Aug 16 00:00:00.000
45156 ONEWEB-0052 [+] 0.417 7.460E-08 3.120 4.470 15.012
38816 FENGYUN 1C DEB [-] 0.625 2020 Aug 09 00:00:01.898 2020 Aug 09 00:00:02.048 2020 Aug 09 00:00:02.197
42901 VENUS [+] 0.296 6.695E-07 0.708 2.195 10.846
35643 COSMOS 2251 DEB [-] 1.183 2020 Aug 09 00:00:11.076 2020 Aug 09 00:00:11.490 2020 Aug 09 00:00:11.904
26064 FALCONSAT [-] 0.460 1.650E-07 1.452 2.097 14.867
41925 IRIDIUM 112 [+] 0.272 2020 Aug 09 00:00:13.746 2020 Aug 09 00:00:14.051 2020 Aug 09 00:00:14.356

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: 2020 Aug 09 03:02:36 UTC
Accessed 1 times since 2000 December 16
Current system time: 2020 Aug 09 06:06:24 UTC