SOCRATES

Search Results


Search parameters:

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


Data current as of 2020 Feb 24 00:08 UTC

Computation Interval: Start = 2020 Feb 24 00:00:00.000, Stop = 2020 Mar 02 00:00:00.000
Computation Threshold: 5.0 km
Considering: 5,179 Primaries, 18,282 Secondaries (30,807 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)
45096 STARLINK-1152 [+] 3.606 3.853E-02 0.003 0.010 0.001
45102 STARLINK-1195 [+] 3.542 2020 Feb 27 00:07:42.561 2020 Feb 27 02:02:57.544 2020 Feb 27 04:36:10.822
14401 COSMOS 1503 [?] 6.648 9.206E-03 0.008 0.032 6.553
32364 FENGYUN 1C DEB [-] 6.802 2020 Feb 29 23:11:31.409 2020 Feb 29 23:11:32.171 2020 Feb 29 23:11:32.934
25338 NOAA 15 [B] 3.912 1.194E-02 0.018 0.035 14.108
14568 SL-8 DEB [-] 3.990 2020 Feb 27 09:51:55.129 2020 Feb 27 09:51:55.484 2020 Feb 27 09:51:55.838
45066 STARLINK-1145 [+] 4.218 1.341E-03 0.014 0.057 0.001
45074 STARLINK-1172 [+] 4.218 2020 Feb 27 15:39:59.956 2020 Feb 27 19:43:34.259 2020 Feb 27 21:50:09.850
45092 STARLINK-1137 [+] 4.991 1.178E-03 0.015 0.060 0.000
45102 STARLINK-1195 [+] 4.991 2020 Feb 28 09:22:12.398 2020 Feb 28 12:50:16.340 2020 Feb 28 16:54:33.546
20436 SPOT 2 [-] 2.609 2.223E-02 0.015 0.062 1.330
28220 SHIYAN 1 (SY-1) [+] 2.751 2020 Feb 26 02:28:20.978 2020 Feb 26 02:28:24.736 2020 Feb 26 02:28:28.495
22823 SPOT 3 [-] 4.777 7.544E-03 0.044 0.063 14.845
29292 METEOR 2-5 DEB [-] 5.961 2020 Feb 28 04:52:42.452 2020 Feb 28 04:52:42.788 2020 Feb 28 04:52:43.125
44484 AEROCUBE 10B (DOUGSAT) [+] 5.468 9.670E-04 0.016 0.067 0.001
44485 AEROCUBE 10A (JIMSAT) [+] 5.468 2020 Feb 26 13:09:16.207 2020 Feb 28 23:51:53.429 2020 Mar 02 00:00:00.000
41466 SAMSAT-218D [-] 6.589 8.137E-04 0.018 0.069 7.611
44370 SPACEBEE-9 [+] 6.991 2020 Mar 01 09:25:01.652 2020 Mar 01 09:25:02.309 2020 Mar 01 09:25:02.966
18119 COSMOS 1858 [?] 7.332 2.028E-04 0.050 0.071 14.214
03767 DELTA 1 R/B [-] 6.917 2020 Mar 01 12:17:48.060 2020 Mar 01 12:17:48.412 2020 Mar 01 12:17:48.764

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 Feb 24 01:51:04 UTC
Accessed 1 times since 2000 December 16
Current system time: 2020 Feb 24 08:39:28 UTC