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CelesTrak

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  • Name(s): Top 25 by Minimum Range
  • Order by Minimum Range
  • Return first 25 items


Data current as of 2024 Jun 13 16:05:34 UTC

Computation Interval: Start = 2024 Jun 13 16:00:00 UTC, Stop = 2024 Jun 20 16:00:00 UTC
Computation Threshold: 5.0 km
Considering: 9,992 Primaries, 26,175 Secondaries (69,260 Conjunctions)
12 SGP4 Propagation Errors
Computation run time: 04h 49m 42.689s

SOCRATES Format Documentation

See notes at bottom of page for data field descriptions

Data
&
Graphs
NORAD
Catalog
Number
Name [Ops Status] Days
Since
Epoch
TCA
(UTC)
Min
Range
(km)
Relative
Speed
(km/sec)
Max
Probability
Dilution
Threshold
(km)
GP Data 28420 COSMOS 2409 [+] 3.952 2024-06-17 09:56:40.525 0.032 6.738
50 km All 8165 THORAD DELTA 1 DEB [-] 4.643 3.883E-03 0.008
GP Data 46782 STARLINK-1835 [+] 4.609 2024-06-18 02:04:40.206 0.041 13.532
50 km All 34847 COSMOS 2251 DEB [-] 4.897 1.294E-02 0.018
GP Data 55019 KSF3-B [+] 6.873 2024-06-20 09:00:41.143 0.043 15.066
50 km All 56198 UMBRA-06 [+] 7.119 8.665E-04 0.028
GP Data 56865 OBJECT V [+] 3.895 2024-06-17 09:41:46.451 0.043 14.298
50 km All 59693 STARLINK-32088 [+] 3.926 3.386E-02 0.021
GP Data 53675 STARLINK-4617 [+] 4.648 2024-06-17 20:23:52.058 0.045 1.464
50 km All 36800 PSLV R/B [-] 4.382 1.885E-02 0.011
GP Data 53265 STARLINK-4097 [+] 3.397 2024-06-16 16:09:57.542 0.047 9.433
50 km All 14866 SL-8 DEB [-] 3.189 1.420E-02 0.014
GP Data 56030 STARLINK-5781 [+] 2.136 2024-06-15 15:15:16.018 0.047 8.420
50 km All 44891 OBJECT N [-] 2.141 1.492E-02 0.013
GP Data 59777 OBJECT E [+] 2.038 2024-06-15 14:08:53.576 0.055 0.000
50 km All 59809 OBJECT K [+] 2.104 1.460E-03 0.013
GP Data 49773 GLOBAL-13 [+] 4.184 2024-06-17 16:59:58.847 0.059 6.371
50 km All 54399 CZ-6A DEB [-] 4.996 1.152E-03 0.015
GP Data 56377 STARLINK-6189 [+] 4.094 2024-06-17 04:28:23.839 0.062 14.126
50 km All 43810 OBJECT BE [-] 3.994 1.623E-02 0.031
Data
&
Graphs
NORAD
Catalog
Number
Name [Ops Status] Days
Since
Epoch
TCA
(UTC)
Min
Range
(km)
Relative
Speed
(km/sec)
Max
Probability
Dilution
Threshold
(km)
GP Data 45536 STARLINK-1352 [+] 7.266 2024-06-20 11:00:06.843 0.064 14.678
50 km All 57182 MONITOR-4 (RS57S) [+] 7.031 4.032E-03 0.036
GP Data 57135 STARLINK-6127 [+] 4.257 2024-06-17 03:56:18.448 0.067 14.302
50 km All 26214 CZ-4B DEB [-] 4.258 1.334E-02 0.035
GP Data 56990 ELO-4 [+] 0.629 2024-06-13 22:48:54.078 0.068 13.918
50 km All 58034 STARLINK-30565 [+] 0.708 1.436E-02 0.032
GP Data 57088 STARLINK-6257 [+] 3.096 2024-06-15 18:07:12.063 0.076 14.248
50 km All 36258 FENGYUN 1C DEB [-] 3.130 1.071E-02 0.038
GP Data 58199 TIANHUI 5A [+] 3.998 2024-06-17 11:41:27.029 0.088 0.000
50 km All 58201 TIANHUI 5B [+] 4.065 5.632E-04 0.021
GP Data 43015 MIRATA [+] 7.096 2024-06-20 12:27:11.548 0.089 15.028
50 km All 58292 UMBRA-08 [+] 7.772 2.003E-04 0.058
GP Data 58199 TIANHUI 5A [+] 4.065 2024-06-17 13:18:36.464 0.089 0.000
50 km All 58201 TIANHUI 5B [+] 4.133 5.632E-04 0.021
GP Data 58199 TIANHUI 5A [+] 3.931 2024-06-17 10:04:14.644 0.090 0.000
50 km All 58201 TIANHUI 5B [+] 3.998 5.632E-04 0.021
GP Data 58199 TIANHUI 5A [+] 4.133 2024-06-17 14:55:43.217 0.095 0.000
50 km All 58201 TIANHUI 5B [+] 4.200 5.632E-04 0.021
GP Data 58199 TIANHUI 5A [+] 3.863 2024-06-17 08:26:59.140 0.096 0.000
50 km All 58201 TIANHUI 5B [+] 3.930 5.632E-04 0.021
Data
&
Graphs
NORAD
Catalog
Number
Name [Ops Status] Days
Since
Epoch
TCA
(UTC)
Min
Range
(km)
Relative
Speed
(km/sec)
Max
Probability
Dilution
Threshold
(km)
GP Data 51132 STARLINK-3393 [+] 5.088 2024-06-18 15:32:12.253 0.098 9.327
50 km All 59920 OBJECT D [+] 5.095 3.329E-03 0.029
GP Data 57120 STARLINK-6147 [+] 5.842 2024-06-18 23:53:36.095 0.098 13.922
50 km All 58023 PRETTY [+] 5.824 6.899E-03 0.046
GP Data 53627 STARLINK-4595 [+] 5.446 2024-06-18 20:26:28.364 0.100 10.642
50 km All 30828 FENGYUN 1C DEB [-] 6.659 2.984E-03 0.031
GP Data 55045 NUSAT-34 (AMELIA EARHART) [+] 4.835 2024-06-18 08:33:31.592 0.102 5.789
50 km All 40337 CZ-4B R/B [-] 5.262 3.955E-04 0.026
GP Data 50993 ION SCV-004 [+] 4.418 2024-06-17 14:29:25.223 0.104 15.135
50 km All 39871 SL-16 DEB [-] 5.157 1.434E-04 0.070

25 records found

Data Fields:
  • Data: The GP Data button links to a page which provides the GP data used to generate the associated prediction.
  • NORAD Catalog Number: NORAD Catalog Numbers of the two conjuncting objects.
  • Name: SATCAT 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 GP or SupGP (green) element set used to produce the prediction until the time of closest approach for the conjunction.
  • TCA (UTC): Time of closest approach.
  • Min Range (km): The distance between the two conjuncting objects at the time of closest approach.
  • Relative Speed (km/sec): Relative speed of the two conjuncting objects at the time of closest approach.
  • 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. For more details on the maximum probability method, see Dr. Sal Alfano's paper titled "Relating Position Uncertainty to Maximum Conjunction Probability".
  • 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.
  • SGP4 Propagation Errors: A list of objects which were not screened because their GP data shows they have already decayed (but haven't yet been reflected in the SATCAT) or will decay prior to the end of the computation interval.