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 Dec 05 08:06 UTC

Computation Interval: Start = 2019 Dec 05 00:00:00.000, Stop = 2019 Dec 12 00:00:00.000
Computation Threshold: 5.0 km
Considering: 4,943 Primaries, 17,926 Secondaries (29,683 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)
40921 COSMOS 2508 [+] 5.457 1.845E-03 0.019 0.029 14.073
40773 DELTA 1 DEB [-] 8.537 2019 Dec 10 05:28:30.594 2019 Dec 10 05:28:30.950 2019 Dec 10 05:28:31.305
44703 GAOFEN 7 [+] 6.086 4.940E-03 0.013 0.043 10.422
14208 SL-3 R/B [-] 5.412 2019 Dec 10 07:21:47.699 2019 Dec 10 07:21:48.178 2019 Dec 10 07:21:48.658
26102 MTI [+] 1.947 1.778E-03 0.013 0.044 10.223
44787 KZ-1A R/B [-] 1.807 2019 Dec 06 11:54:55.871 2019 Dec 06 11:54:56.360 2019 Dec 06 11:54:56.849
23464 ASTRID 1 [?] 6.869 4.332E-04 0.023 0.045 13.788
05067 THORAD AGENA D DEB [-] 6.884 2019 Dec 11 17:43:55.182 2019 Dec 11 17:43:55.545 2019 Dec 11 17:43:55.907
44402 LEMUR-2-WANLI [+] 5.211 2.082E-03 0.011 0.046 0.007
44406 LUCKY-7 [+] 5.211 2019 Dec 10 01:23:00.978 2019 Dec 10 01:37:00.316 2019 Dec 10 01:51:02.125
25413 ORBCOMM FM17 [-] 5.506 4.288E-03 0.014 0.051 8.149
36089 CZ-2C R/B [-] 5.441 2019 Dec 10 08:38:02.863 2019 Dec 10 08:38:03.476 2019 Dec 10 08:38:04.090
24753 DMSP 5D-2 F14 (USA 131) [P] 6.445 8.367E-04 0.022 0.056 12.692
30093 FENGYUN 1C DEB [-] 6.485 2019 Dec 11 08:41:01.812 2019 Dec 11 08:41:02.206 2019 Dec 11 08:41:02.600
18160 COSMOS 1864 [?] 5.803 1.819E-03 0.035 0.066 13.891
30436 FENGYUN 1C DEB [-] 6.196 2019 Dec 10 16:19:44.525 2019 Dec 10 16:19:44.885 2019 Dec 10 16:19:45.245
40018 APRIZESAT 9 [+] 4.124 3.098E-04 0.047 0.072 14.854
34209 CBERS 1 DEB [-] 4.138 2019 Dec 08 23:05:58.073 2019 Dec 08 23:05:58.409 2019 Dec 08 23:05:58.746
42886 FLOCK 2K-19 [+] 4.888 8.248E-04 0.044 0.078 14.772
12155 SL-3 R/B [-] 4.914 2019 Dec 09 18:53:42.479 2019 Dec 09 18:53:42.817 2019 Dec 09 18:53:43.156

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 Dec 05 09:45:44 UTC
Accessed 1 times since 2000 December 16
Current system time: 2019 Dec 05 17:11:39 UTC