SOCRATES

Search Results

CelesTrak

Search parameters:

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


Data current as of 2023 Feb 04 16:05 UTC

Computation Interval: Start = 2023 Feb 04 12:00:00.000, Stop = 2023 Feb 11 12:00:00.000
Computation Threshold: 5.0 km
Considering: 9,971 Primaries, 24,003 Secondaries (106,235 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)
51110 STARLINK-3344 [+] 3.652 7.855E-02 0.002 0.006 10.265
53293 STARLINK-4148 [+] 3.270 2023 Feb 07 19:53:21.456 2023 Feb 07 19:53:21.943 2023 Feb 07 19:53:22.430
52268 STARLINK-3746 [+] 4.055 3.179E-02 0.003 0.011 4.659
53551 STARLINK-4514 [+] 4.126 2023 Feb 08 13:06:42.615 2023 Feb 08 13:06:43.688 2023 Feb 08 13:06:44.761
50193 STARLINK-3261 [+] 6.941 2.553E-02 0.003 0.013 4.664
53861 STARLINK-4781 [+] 6.472 2023 Feb 10 15:54:24.554 2023 Feb 10 15:54:25.626 2023 Feb 10 15:54:26.698
48577 STARLINK-2231 [+] 6.980 1.958E-02 0.004 0.014 4.640
48695 STARLINK-2616 [+] 6.256 2023 Feb 10 18:04:05.099 2023 Feb 10 18:04:06.177 2023 Feb 10 18:04:07.254
52579 STARLINK-3893 [+] 5.750 1.873E-02 0.004 0.014 6.939
53986 STARLINK-5119 [+] 5.742 2023 Feb 10 00:19:15.888 2023 Feb 10 00:19:16.609 2023 Feb 10 00:19:17.329
52752 NUSAT-31 (RUBY PAYNE-S) [+] 5.441 6.645E-03 0.010 0.016 14.962
31481 FENGYUN 1C DEB [-] 5.440 2023 Feb 09 17:51:11.928 2023 Feb 09 17:51:12.262 2023 Feb 09 17:51:12.597
49492 GAOFEN 11-3 [+] 1.577 1.382E-02 0.004 0.018 1.074
51042 FLOCK 4X-34 [+] 2.572 2023 Feb 05 17:17:18.619 2023 Feb 05 17:17:23.276 2023 Feb 05 17:17:27.934
52675 STARLINK-3934 [+] 2.703 8.952E-03 0.006 0.021 6.978
53988 STARLINK-5113 [+] 2.695 2023 Feb 07 01:49:14.054 2023 Feb 07 01:49:14.771 2023 Feb 07 01:49:15.487
17177 COSMOS 1803 [?] 5.631 2.236E-02 0.005 0.021 3.952
32263 GLOBALSTAR M067 [+] 5.480 2023 Feb 09 17:52:10.026 2023 Feb 09 17:52:11.291 2023 Feb 09 17:52:12.556
46150 STARLINK-1629 [+] 4.750 4.637E-03 0.010 0.022 13.638
24082 PEGASUS DEB [-] 4.486 2023 Feb 08 21:54:43.347 2023 Feb 08 21:54:43.714 2023 Feb 08 21:54:44.080

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.