SOCRATES

Search Results


Search parameters:

  • Name(s): Top 10 by Time In
  • Order by Start Time
  • Return first 10 items


Data current as of 2019 Nov 17 08:06 UTC

Computation Interval: Start = 2019 Nov 17 00:00:00.000, Stop = 2019 Nov 24 00:00:00.000
Computation Threshold: 5.0 km
Considering: 4,919 Primaries, 17,893 Secondaries (29,355 Conjunctions)

See notes at bottom of page for data field descriptions

Re-sort results by Maximum Probability, Minimum Range.

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)
31698 TERRASAR-X [+] 0.823 1.341E-06 0.427 1.814 0.003
36605 TANDEM-X [+] 0.489 2019 Nov 17 00:00:00.000 2019 Nov 17 01:20:25.075 2019 Nov 17 05:09:34.129
43186 S-NET D [+] 2.357 1.141E-01 0.001 0.006 0.002
43189 S-NET C [+] 2.357 2019 Nov 17 00:00:00.000 2019 Nov 19 05:04:08.357 2019 Nov 24 00:00:00.000
44207 TIANHUI 2-01A [+] 0.312 6.496E-06 0.194 0.824 0.001
44209 TIANHUI 2-01B [+] -0.207 2019 Nov 17 00:00:00.000 2019 Nov 17 00:14:25.265 2019 Nov 23 11:56:21.673
44740 STARLINK AD [+] -0.241 9.491E-07 0.590 1.857 0.002
44770 STARLINK BK [+] -0.241 2019 Nov 17 00:00:00.000 2019 Nov 17 00:12:53.855 2019 Nov 17 00:42:41.177
44720 STARLINK H [+] -0.250 1.622E-07 1.303 4.926 0.006
44766 STARLINK BF [+] -0.250 2019 Nov 17 00:00:00.000 2019 Nov 17 00:00:00.000 2019 Nov 17 00:00:15.282
00801 OPS 4412 (TRANSIT 9) [?] 0.120 5.988E-07 0.649 2.678 3.667
26614 DELTA 1 DEB [-] 0.097 2019 Nov 17 00:01:01.896 2019 Nov 17 00:01:03.048 2019 Nov 17 00:01:04.200
22828 KITSAT B (KO-25) [-] 0.112 5.619E-08 1.876 3.993 13.739
44027 ORBCOMM FM16 DEB [-] 0.348 2019 Nov 17 00:01:05.051 2019 Nov 17 00:01:05.270 2019 Nov 17 00:01:05.489
25420 ORBCOMM FM13 [+] 0.581 3.306E-06 0.702 2.669 7.039
25475 ORBCOMM FM21 [+] 0.081 2019 Nov 17 00:01:33.186 2019 Nov 17 00:01:33.787 2019 Nov 17 00:01:34.388
15031 COSMOS 1570 [?] 0.314 2.636E-07 2.542 3.686 14.865
31773 FENGYUN 1C DEB [-] 1.226 2019 Nov 17 00:01:35.663 2019 Nov 17 00:01:35.890 2019 Nov 17 00:01:36.118
27597 MIDORI II (ADEOS-II) [-] 0.116 1.293E-07 2.127 3.783 14.334
41362 NOAA 16 DEB [-] 0.270 2019 Nov 17 00:01:47.978 2019 Nov 17 00:01:48.206 2019 Nov 17 00:01:48.434

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 Nov 17 09:46:13 UTC
Accessed 1 times since 2000 December 16
Current system time: 2019 Nov 17 16:14:12 UTC