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 05 00:06 UTC

Computation Interval: Start = 2020 Dec 05 00:00:00.000, Stop = 2020 Dec 12 00:00:00.000
Computation Threshold: 5.0 km
Considering: 6,079 Primaries, 19,871 Secondaries (39,232 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)
43781 VESTA-1 [-] 6.916 1.740E-02 0.006 0.010 14.774
44608 FREGAT DEB [-] 7.774 2020 Dec 11 08:17:16.570 2020 Dec 11 08:17:16.908 2020 Dec 11 08:17:17.247
44421 COSMOS 2535 [+] 5.196 3.374E-02 0.003 0.011 0.000
44424 COSMOS 2536 [+] 4.859 2020 Dec 05 00:00:00.000 2020 Dec 09 01:06:35.190 2020 Dec 12 00:00:00.000
45589 STARLINK-1364 [+] 4.229 3.661E-03 0.011 0.026 13.299
46491 YARILO 2 [+] 4.649 2020 Dec 08 17:58:51.534 2020 Dec 08 17:58:51.910 2020 Dec 08 17:58:52.286
42997 FLOCK 3M-4 [+] 2.910 3.596E-03 0.008 0.034 4.153
44703 GAOFEN 7 [+] 2.294 2020 Dec 07 03:48:21.111 2020 Dec 07 03:48:22.315 2020 Dec 07 03:48:23.519
25758 IRS-P4 (OCEANSAT) [-] 3.361 1.873E-02 0.016 0.042 12.707
29102 SL-16 DEB [-] 3.472 2020 Dec 07 05:04:51.867 2020 Dec 07 05:04:52.260 2020 Dec 07 05:04:52.654
47179 STARLINK-1913 [+] 4.230 2.159E-03 0.011 0.045 0.002
47180 STARLINK-1914 [+] 4.230 2020 Dec 08 21:07:45.741 2020 Dec 08 21:31:26.835 2020 Dec 08 21:55:29.704
47142 STARLINK-1855 [+] 3.354 1.778E-03 0.012 0.049 0.000
47146 STARLINK-1859 [+] 3.354 2020 Dec 07 00:22:00.061 2020 Dec 08 00:29:32.794 2020 Dec 08 19:35:12.147
41607 SWAYAM [+] 4.682 5.769E-04 0.033 0.055 14.871
43901 FLOCK 3K-8 [+] 4.664 2020 Dec 09 01:59:34.918 2020 Dec 09 01:59:35.254 2020 Dec 09 01:59:35.590
46315 LEMUR-2-SCHMIDTFALL [+] 2.896 1.280E-03 0.014 0.058 0.001
46319 KEPLER-2 (TARS) [+] 2.366 2020 Dec 06 17:36:04.538 2020 Dec 06 19:47:39.971 2020 Dec 06 21:51:03.440
44752 STARLINK-1047 [+] 1.759 7.421E-04 0.022 0.063 12.123
45204 STARLINK-1206 [+] 1.593 2020 Dec 06 01:37:49.354 2020 Dec 06 01:37:49.766 2020 Dec 06 01:37:50.179

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.