RECON TNO event list

This table lists the best candidates for TNO occultation for the next two years that are visible from the entire network. These events all have a minimum success probability of 30%.

This list was last updated at 2019/01/18 19:42:07 UT

,
Idx ET Desig Vmag Since
(yrs)
TNO pos err Diam(5%) Diam(30%) DES Classification StarID RA Dec mag minsep selong RECON Prob
321687 2019 Jan 28 05:11:20 14YY49 23.0 0.2 0.07 55 23 CENTAURR GA0900:02190224 06:59:55.5 +01:25:26 14.5 0.30 150 1.00 45.3%
322065 2019 Feb 10 04:11:08 14YJ50 22.3 0.9 0.06 264 108 3:2E GA1140:03125794 08:56:34.4 +24:11:23 14.2 0.04 167 1.00 34.7%
338281 2019 Nov 13 07:53:46 8405 22.7 0.3 0.18 91 37 CENTAURR UC4-655-032790 05:20:15.1 +40:51:49 15.9 0.09 144 1.00 33.5%
310854 2019 Nov 17 08:28:43 54598 19.2 0.2 0.06 191 78 CENTAURR UC4-668-024120 04:09:20.5 +43:35:33 15.8 0.13 154 1.00 49.7%
310875 2019 Dec 13 08:15:02 54598 19.2 0.2 0.06 191 78 CENTAURR UC4-667-021829 04:01:55.1 +43:18:32 15.4 0.15 154 1.00 52.8%
338295 2019 Dec 16 04:47:39 8405 22.6 0.3 0.18 91 37 CENTAURR UC4-655-031366 05:13:42.4 +40:53:30 14.0 0.10 162 1.00 47.0%
342922 2019 Dec 25 08:39:02 55638 20.1 1.1 0.09 525 214 3:2E UC4-486-019986 06:15:38.8 +07:06:55 16.0 0.18 164 1.00 37.9%
232708 2020 Jan 02 02:58:42 15875 21.7 1.2 0.32 240 98 3:2E GA1160:01598803 05:48:34.5 +27:51:02 16.6 0.12 166 1.00 42.0%
239981 2020 Jan 10 10:15:07 248835 21.7 0.4 0.12 76 31 CENTAURR GA1280:01542791 04:42:15.5 +39:35:00 13.3 0.07 142 1.00 44.0%
241265 2020 Jan 15 09:50:18 449097 21.1 3.2 0.30 72 30 CENTAURR GA1260:03019228 06:59:27.2 +37:05:53 7.9 0.07 161 1.00 48.9%
286477 2020 Sep 16 12:00:38 06QP180 24.4 3.1 0.08 66 27 CENTAURR GA1060:00253317 02:34:51.0 +16:46:44 15.3 0.12 132 0.99 41.3%
361859 2020 Oct 09 12:06:58 14YY49 23.5 0.2 0.07 55 23 CENTAURR GA0900:03020555 07:44:45.1 +01:30:42 16.7 0.05 79 0.99 35.8%
322012 2020 Oct 09 12:12:46 14YY49 23.5 0.2 0.07 55 23 CENTAURR UC4-458-039058 07:44:45.1 +01:30:42 15.9 0.09 79 0.99 32.3%
311046 2020 Oct 18 08:16:37 54598 19.3 0.2 0.06 191 78 CENTAURR UC4-672-032094 04:56:42.0 +44:18:50 15.6 0.00 124 1.00 35.3%
363957 2020 Oct 21 11:36:22 523597 22.8 0.4 0.06 110 45 CENTAURR GA1080:00204642 01:56:32.2 +19:04:27 15.0 0.16 171 1.00 32.4%
363547 2020 Oct 24 12:20:17 54598 19.2 0.2 0.06 191 78 CENTAURR GA1340:02547373 04:55:40.4 +44:24:33 11.9 0.11 130 0.99 55.9%
1008496 2020 Nov 25 07:06:52 03UP292 22.0 1.1 0.06 212 87 2:1E GA1240:01837871 05:24:01.9 +34:12:16 17.0 0.00 158 1.00 39.5%

The green lines highlight those events for which the star is visible to the entire RECON network at the time of the appulse. This corresponds to a "score" (second to last column) of 1. If the score is between 0 and 1, only part of the network can view the star at the right time. The last column is the estimate of the probability of success for RECON if it attempts this event. This number is based on the uncertainty in the prediction combined with the actual geometry for RECON for the event. In general, we look for a probability greater than about 30% for an official RECON campaign. This probability does not include any factors such as weather.

Most of the columns are self-explanatory. The two diameters give an estimate of the size of the object for two different albedos (5% and 30%). "TNO pos err" is the uncertainty in the position of the TNO at the time of the appulse, in arc-seconds. "minsep" is the minimum separation (in arcsec) between the star and TNO as seen from the position of the center of the earth. "selong" is the angle between the sun and the object (solar elongation) at the time of the event.

Marc W. Buie, Southwest Research Institute

RECON