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CelesTrak

Search parameters:

  • NORAD Catalog Number(s): 25544
  • 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 25544 ISS (ZARYA) [+] 0.125 2024-06-13 16:02:42.944 1.265 0.002
50 km All 59968 STARLINER CFT-1 [+] 0.854 1.673E-04 0.298
GP Data 25544 ISS (ZARYA) [+] 0.190 2024-06-13 17:35:19.985 1.375 0.002
50 km All 59968 STARLINER CFT-1 [+] 0.918 1.673E-04 0.298
GP Data 25544 ISS (ZARYA) [+] 0.254 2024-06-13 19:07:58.183 1.489 0.002
50 km All 59968 STARLINER CFT-1 [+] 0.983 1.673E-04 0.298
GP Data 25544 ISS (ZARYA) [+] 0.318 2024-06-13 20:40:37.465 1.608 0.002
50 km All 59968 STARLINER CFT-1 [+] 1.047 1.673E-04 0.298
GP Data 25544 ISS (ZARYA) [+] 0.383 2024-06-13 22:13:17.710 1.731 0.002
50 km All 59968 STARLINER CFT-1 [+] 1.111 1.673E-04 0.298
GP Data 25544 ISS (ZARYA) [+] 0.447 2024-06-13 23:45:58.874 1.858 0.002
50 km All 59968 STARLINER CFT-1 [+] 1.176 1.673E-04 0.298
GP Data 25544 ISS (ZARYA) [+] 0.511 2024-06-14 01:18:40.832 1.990 0.002
50 km All 59968 STARLINER CFT-1 [+] 1.240 1.673E-04 0.298
GP Data 25544 ISS (ZARYA) [+] 0.576 2024-06-14 02:51:23.501 2.126 0.003
50 km All 59968 STARLINER CFT-1 [+] 1.304 1.673E-04 0.298
GP Data 25544 ISS (ZARYA) [+] 0.640 2024-06-14 04:24:06.835 2.266 0.003
50 km All 59968 STARLINER CFT-1 [+] 1.369 1.673E-04 0.298
GP Data 25544 ISS (ZARYA) [+] 0.705 2024-06-14 05:56:50.773 2.411 0.003
50 km All 59968 STARLINER CFT-1 [+] 1.433 1.673E-04 0.298
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 25544 ISS (ZARYA) [+] 0.769 2024-06-14 07:29:35.257 2.559 0.003
50 km All 59968 STARLINER CFT-1 [+] 1.498 1.673E-04 0.298
GP Data 25544 ISS (ZARYA) [+] 0.833 2024-06-14 09:02:20.194 2.712 0.003
50 km All 59968 STARLINER CFT-1 [+] 1.562 1.673E-04 0.298
GP Data 25544 ISS (ZARYA) [+] 0.898 2024-06-14 10:35:05.565 2.869 0.003
50 km All 59968 STARLINER CFT-1 [+] 1.626 1.673E-04 0.298
GP Data 25544 ISS (ZARYA) [+] 0.962 2024-06-14 12:07:51.386 3.030 0.004
50 km All 59968 STARLINER CFT-1 [+] 1.691 1.673E-04 0.298
GP Data 25544 ISS (ZARYA) [+] 1.027 2024-06-14 13:40:37.524 3.196 0.004
50 km All 59968 STARLINER CFT-1 [+] 1.755 1.673E-04 0.298
GP Data 25544 ISS (ZARYA) [+] 1.091 2024-06-14 15:13:24.030 3.366 0.004
50 km All 59968 STARLINER CFT-1 [+] 1.820 1.673E-04 0.298
GP Data 25544 ISS (ZARYA) [+] 5.929 2024-06-19 11:20:05.881 3.467 9.667
50 km All 47514 FLOCK 4S-28 [+] 6.738 1.655E-05 1.017
GP Data 25544 ISS (ZARYA) [+] 1.156 2024-06-14 16:46:10.800 3.540 0.004
50 km All 59968 STARLINER CFT-1 [+] 1.884 1.673E-04 0.298
GP Data 25544 ISS (ZARYA) [+] 2.834 2024-06-16 09:02:35.404 3.666 11.048
50 km All 47527 FLOCK 4S-7 [+] 2.927 1.351E-05 1.178
GP Data 25544 ISS (ZARYA) [+] 1.220 2024-06-14 18:18:57.875 3.718 0.004
50 km All 59968 STARLINER CFT-1 [+] 1.949 1.673E-04 0.298
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 25544 ISS (ZARYA) [+] 1.284 2024-06-14 19:51:45.165 3.900 0.005
50 km All 59968 STARLINER CFT-1 [+] 2.013 1.673E-04 0.298
GP Data 25544 ISS (ZARYA) [+] 1.349 2024-06-14 21:24:32.702 4.087 0.005
50 km All 59968 STARLINER CFT-1 [+] 2.077 1.673E-04 0.298
GP Data 25544 ISS (ZARYA) [+] 1.413 2024-06-14 22:57:20.420 4.277 0.005
50 km All 59968 STARLINER CFT-1 [+] 2.142 1.673E-04 0.298
GP Data 25544 ISS (ZARYA) [+] 1.478 2024-06-15 00:30:08.343 4.472 0.005
50 km All 59968 STARLINER CFT-1 [+] 2.206 1.339E-05 1.054
GP Data 25544 ISS (ZARYA) [+] 6.834 2024-06-20 09:02:44.495 4.604 8.275
50 km All 50994 FLOCK 4X-44 [+] 7.191 1.005E-05 1.261

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.