SOCRATES

Search Results


Search parameters:

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


Data current as of 2019 Nov 17 08:06 UTC

Computation Interval: Start = 2019 Nov 17 00:00:00.000, Stop = 2019 Nov 24 00:00:00.000
Computation Threshold: 5.0 km
Considering: 4,919 Primaries, 17,893 Secondaries (29,355 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)
43186 S-NET D [+] 2.357 1.141E-01 0.001 0.006 0.002
43189 S-NET C [+] 2.357 2019 Nov 17 00:00:00.000 2019 Nov 19 05:04:08.357 2019 Nov 24 00:00:00.000
23704 COSMOS 2322 [?] 1.801 2.801E-03 0.014 0.027 13.922
04143 THORAD AGENA D DEB [-] 1.768 2019 Nov 18 15:40:27.622 2019 Nov 18 15:40:27.981 2019 Nov 18 15:40:28.340
13164 COSMOS 1361 [?] 3.411 1.569E-03 0.015 0.032 12.942
10876 DELTA 1 DEB [-] 3.735 2019 Nov 20 07:20:10.957 2019 Nov 20 07:20:11.344 2019 Nov 20 07:20:11.730
26619 EO-1 [-] 5.098 7.327E-04 0.029 0.047 14.713
33700 FENGYUN 1C DEB [-] 5.935 2019 Nov 22 04:38:33.398 2019 Nov 22 04:38:33.738 2019 Nov 22 04:38:34.078
26932 SAPPHIRE (NO-45) [-] 6.798 1.478E-03 0.015 0.049 9.808
32304 FENGYUN 1C DEB [-] 10.752 2019 Nov 23 03:25:25.454 2019 Nov 23 03:25:25.964 2019 Nov 23 03:25:26.474
14759 COSMOS 1538 [?] 0.522 1.214E-03 0.038 0.054 14.854
29809 FENGYUN 1C DEB [-] 0.049 2019 Nov 17 04:03:22.701 2019 Nov 17 04:03:23.037 2019 Nov 17 04:03:23.374
44754 STARLINK AT [+] 0.797 1.329E-03 0.014 0.057 0.001
44771 STARLINK BL [+] 0.797 2019 Nov 17 23:05:16.265 2019 Nov 18 01:07:07.762 2019 Nov 18 03:56:14.629
43712 TIANPING 1A [+] 4.242 1.116E-03 0.015 0.063 0.001
43714 TIANPING 1B [+] 4.242 2019 Nov 21 08:30:48.191 2019 Nov 21 11:33:41.306 2019 Nov 21 13:43:26.364
38861 SJ-9B [+] 5.188 5.488E-04 0.030 0.063 13.911
01931 THOR ALTAIR DEB [-] 5.651 2019 Nov 22 09:39:39.177 2019 Nov 22 09:39:39.537 2019 Nov 22 09:39:39.896
22236 COSMOS 2221 [?] 1.966 3.368E-04 0.043 0.072 14.667
43067 H-2A R/B [-] 2.208 2019 Nov 19 01:43:37.699 2019 Nov 19 01:43:38.040 2019 Nov 19 01:43:38.381

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 Nov 17 09:46:13 UTC
Accessed 1 times since 2000 December 16
Current system time: 2019 Nov 17 15:31:34 UTC