SOCRATES

Search Results


Search parameters:

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


Data current as of 2021 Mar 05 00:06 UTC

Computation Interval: Start = 2021 Mar 05 00:00:00.000, Stop = 2021 Mar 12 00:00:00.000
Computation Threshold: 5.0 km
Considering: 6,438 Primaries, 20,168 Secondaries (46,826 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)
26824 INTELSAT 901 (IS-901) [+] 0.508 1.000E+00 0.000 0.000 0.000
44625 MEV-1 [+] 0.508 2021 Mar 05 00:00:00.000 2021 Mar 05 00:00:00.000 2021 Mar 12 00:00:00.000
18820 METEOR 2-17 [?] 2.690 1.283E-01 0.007 0.012 14.636
38173 FENGYUN 1C DEB [-] 3.221 2021 Mar 07 03:19:48.349 2021 Mar 07 03:19:48.690 2021 Mar 07 03:19:49.032
46822 FLOCK 4E'-6 [+] 3.347 7.525E-03 0.006 0.024 1.329
47700 OBJECT B [-] 3.622 2021 Mar 07 23:17:11.172 2021 Mar 07 23:17:14.933 2021 Mar 07 23:17:18.694
46272 NUSAT-6 (HYPATIA) [+] 3.271 2.309E-03 0.015 0.030 14.333
43862 OBJECT P [-] 3.530 2021 Mar 07 19:38:32.534 2021 Mar 07 19:38:32.883 2021 Mar 07 19:38:33.232
43114 ICEYE-X1 [+] 1.788 2.148E-03 0.011 0.043 6.249
42559 DELTA 1 DEB [-] 2.844 2021 Mar 06 10:20:54.038 2021 Mar 06 10:20:54.838 2021 Mar 06 10:20:55.638
47627 STARLINK-1972 [+] 2.321 2.272E-03 0.010 0.044 0.003
47641 STARLINK-2019 [+] 2.321 2021 Mar 07 03:25:07.983 2021 Mar 07 03:42:22.551 2021 Mar 07 04:02:07.147
45660 STARLINK-1443 [+] 5.649 1.618E-03 0.014 0.047 9.629
46747 STARLINK-1908 [+] 5.132 2021 Mar 09 23:10:22.093 2021 Mar 09 23:10:22.612 2021 Mar 09 23:10:23.132
06965 COSMOS 614 [?] 6.372 1.742E-03 0.030 0.047 14.752
30122 FENGYUN 1C DEB [-] 6.595 2021 Mar 10 20:58:09.297 2021 Mar 10 20:58:09.636 2021 Mar 10 20:58:09.975
44738 STARLINK-1033 [+] 2.900 1.634E-03 0.013 0.051 4.639
46554 STARLINK-1671 [+] 2.501 2021 Mar 07 10:01:07.852 2021 Mar 07 10:01:08.930 2021 Mar 07 10:01:10.007
44484 AEROCUBE 10B (DOUGSAT) [+] 4.039 1.367E-03 0.014 0.053 0.000
44485 AEROCUBE 10A (JIMSAT) [+] 4.235 2021 Mar 07 11:29:08.734 2021 Mar 08 16:33:03.553 2021 Mar 09 13:43:50.735

10 records found

Data Fields:
  • Action: The TLE Data button links to a page which provides the TLEs used to generate the associated prediction.
  • 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.