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 Apr 23 08:06 UTC

Computation Interval: Start = 2019 Apr 23 00:00:00.000, Stop = 2019 Apr 30 00:00:00.000
Computation Threshold: 5.0 km
Considering: 4,601 Primaries, 17,359 Secondaries (26,766 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)
42838 LEMUR-2-ANDIS [+] 1.155 1.753E-03 0.015 0.039 12.862
26141 CZ-4B DEB [-] 1.419 2019 Apr 24 09:06:05.514 2019 Apr 24 09:06:05.902 2019 Apr 24 09:06:06.291
14506 OPS 1294 (DMSP 5D-2 F7) [-] 2.464 5.553E-04 0.033 0.057 14.373
39642 COSMOS 1867 COOLANT [-] 2.038 2019 Apr 25 02:50:40.632 2019 Apr 25 02:50:40.980 2019 Apr 25 02:50:41.328
12504 COSMOS 1275 [?] 3.470 4.444E-03 0.015 0.062 4.047
31219 FENGYUN 1C DEB [-] 3.547 2019 Apr 26 08:26:00.045 2019 Apr 26 08:26:01.280 2019 Apr 26 08:26:02.515
25117 ORBCOMM FM05 [+] 2.087 1.587E-03 0.028 0.070 12.698
37508 COSMOS 2251 DEB [-] 2.565 2019 Apr 24 20:16:13.853 2019 Apr 24 20:16:14.247 2019 Apr 24 20:16:14.641
43044 CHEFSAT [+] -0.129 7.148E-04 0.019 0.076 6.078
32406 FENGYUN 1C DEB [-] 0.979 2019 Apr 23 00:56:03.645 2019 Apr 23 00:56:04.467 2019 Apr 23 00:56:05.290
43768 AISTECHSAT 2 [+] 5.487 2.234E-04 0.055 0.085 14.973
35097 FENGYUN 1C DEB [-] 7.702 2019 Apr 28 15:28:24.680 2019 Apr 28 15:28:25.014 2019 Apr 28 15:28:25.348
01291 SOLRAD 7B [?] 3.560 2.496E-04 0.046 0.090 13.902
17271 SL-14 DEB [-] 3.972 2019 Apr 26 18:36:20.361 2019 Apr 26 18:36:20.721 2019 Apr 26 18:36:21.080
41959 FLOCK 3P-21 [+] 2.155 2.042E-04 0.056 0.091 14.892
43908 LUME 1 [+] 2.340 2019 Apr 25 00:39:03.243 2019 Apr 25 00:39:03.579 2019 Apr 25 00:39:03.914
42964 IRIDIUM 125 [+] 6.745 4.508E-04 0.024 0.095 6.154
04193 THORAD AGENA D DEB [-] 6.452 2019 Apr 29 13:55:33.687 2019 Apr 29 13:55:34.499 2019 Apr 29 13:55:35.312
13381 COSMOS 1394 [?] 6.425 1.093E-04 0.068 0.100 14.149
03051 DELTA 1 DEB [-] 7.462 2019 Apr 29 06:57:17.738 2019 Apr 29 06:57:18.091 2019 Apr 29 06:57:18.445

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 Apr 23 09:36:58 UTC
Accessed 1 times since 2000 December 16
Current system time: 2019 Apr 23 16:33:46 UTC