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 Dec 02 00:06 UTC

Computation Interval: Start = 2020 Dec 02 00:00:00.000, Stop = 2020 Dec 09 00:00:00.000
Computation Threshold: 5.0 km
Considering: 6,051 Primaries, 19,883 Secondaries (39,441 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)
44207 TIANHUI 2-01A [+] 1.728 9.017E-03 0.005 0.022 0.000
44209 TIANHUI 2-01B [+] 2.784 2020 Dec 02 00:00:00.000 2020 Dec 03 10:00:34.419 2020 Dec 05 18:03:29.629
37795 BPA-2 & SL-24 R/B [?] 3.106 2.074E-03 0.019 0.027 15.037
39582 COSMOS 2251 DEB [-] 5.028 2020 Dec 04 21:44:55.732 2020 Dec 04 21:44:56.065 2020 Dec 04 21:44:56.397
44421 COSMOS 2535 [+] 0.491 4.364E-03 0.007 0.032 0.000
44424 COSMOS 2536 [+] 0.491 2020 Dec 02 00:00:00.000 2020 Dec 02 01:14:57.889 2020 Dec 09 00:00:00.000
46457 JILIN-01 GAOFEN 3E [+] 1.129 1.489E-03 0.021 0.033 15.030
36004 COSMOS 2251 DEB [-] 1.262 2020 Dec 02 14:51:09.891 2020 Dec 02 14:51:10.223 2020 Dec 02 14:51:10.556
43758 MINXSS-2 [+] 6.565 1.003E-03 0.025 0.041 14.864
36693 FENGYUN 1C DEB [-] 7.101 2020 Dec 08 00:13:29.495 2020 Dec 08 00:13:29.831 2020 Dec 08 00:13:30.168
22829 POSAT 1 [-] 1.324 9.550E-04 0.010 0.041 3.336
12204 DELTA 1 DEB [-] 1.348 2020 Dec 02 20:30:20.189 2020 Dec 02 20:30:21.687 2020 Dec 02 20:30:23.186
45054 STARLINK-1156 [+] 7.504 1.437E-03 0.017 0.043 13.150
05015 COSMOS 397 DEB [-] 7.357 2020 Dec 08 21:31:14.097 2020 Dec 08 21:31:14.477 2020 Dec 08 21:31:14.857
44484 AEROCUBE 10B (DOUGSAT) [+] 3.238 2.042E-03 0.011 0.046 0.000
44485 AEROCUBE 10A (JIMSAT) [+] 3.361 2020 Dec 03 14:44:43.422 2020 Dec 04 18:28:16.355 2020 Dec 05 19:58:03.785
02980 OPS 1264 (DMSP 4A F4) [-] 2.557 7.345E-04 0.031 0.048 14.942
34076 IRIDIUM 33 DEB [-] 2.479 2020 Dec 04 00:41:09.384 2020 Dec 04 00:41:09.719 2020 Dec 04 00:41:10.053
47161 STARLINK AR [+] 6.719 1.057E-03 0.015 0.065 0.001
47177 STARLINK BH [+] 6.719 2020 Dec 07 16:41:14.650 2020 Dec 08 09:15:26.510 2020 Dec 08 15:59:48.154

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.