SOCRATES

Search Results


Search parameters:

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


Data current as of 2021 Mar 07 08:06 UTC

Computation Interval: Start = 2021 Mar 07 00:00:00.000, Stop = 2021 Mar 14 00:00:00.000
Computation Threshold: 5.0 km
Considering: 6,438 Primaries, 20,173 Secondaries (43,321 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)
00876 COSMOS 44 [?] 0.303 1.647E-01 0.003 0.009 8.506
24809 DELTA 2 R/B(1) [-] 0.166 2021 Mar 07 02:55:42.037 2021 Mar 07 02:55:42.625 2021 Mar 07 02:55:43.213
14240 COSMOS 1486 [?] 4.096 1.237E-02 0.008 0.024 11.242
33760 COSMOS 2251 DEB [-] 3.686 2021 Mar 10 15:14:19.601 2021 Mar 10 15:14:20.046 2021 Mar 10 15:14:20.491
33315 RAPIDEYE 3 [-] 1.109 2.432E-03 0.017 0.025 15.112
44995 IRIDIUM 33 DEB [-] 4.259 2021 Mar 08 05:18:10.635 2021 Mar 08 05:18:10.966 2021 Mar 08 05:18:11.296
06659 METEOR 1-15 [?] 6.192 2.571E-02 0.018 0.026 14.870
41415 NOAA 16 DEB [-] 5.672 2021 Mar 12 16:46:33.632 2021 Mar 12 16:46:33.969 2021 Mar 12 16:46:34.305
46945 SPACEBEE-32 [+] 2.545 4.260E-03 0.008 0.032 0.000
46949 SPACEBEE-29 [+] 2.545 2021 Mar 08 12:58:12.144 2021 Mar 09 09:18:26.387 2021 Mar 10 03:15:32.144
47630 STARLINK-1983 [+] 6.831 3.523E-03 0.008 0.035 0.000
47656 STARLINK-2040 [+] 6.831 2021 Mar 13 15:23:08.785 2021 Mar 13 23:56:29.905 2021 Mar 14 00:00:00.000
47471 FLOCK 4S-12 [+] 5.013 2.316E-03 0.010 0.044 0.003
47523 OBJECT DP [-] 5.145 2021 Mar 07 15:17:47.609 2021 Mar 12 02:50:46.233 2021 Mar 14 00:00:00.000
41770 PERUSAT 1 [+] 1.255 1.256E-03 0.019 0.044 13.403
41898 TANSAT [+] 1.319 2021 Mar 08 09:00:17.392 2021 Mar 08 09:00:17.765 2021 Mar 08 09:00:18.138
44739 STARLINK-1052 [+] 3.962 2.228E-03 0.011 0.044 4.115
45371 STARLINK-1287 [+] 4.365 2021 Mar 11 03:34:20.606 2021 Mar 11 03:34:21.821 2021 Mar 11 03:34:23.036
46327 STARLINK-1673 [+] 4.725 1.930E-03 0.012 0.047 4.649
46361 STARLINK-1722 [+] 4.995 2021 Mar 11 19:26:43.443 2021 Mar 11 19:26:44.518 2021 Mar 11 19:26:45.594

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.