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 2018/11/11 19:14:32 UT

,
Idx ET Desig Vmag Since
(yrs)
TNO pos err Diam(5%) Diam(30%) DES Classification StarID RA Dec mag minsep selong RECON Prob
348076 2018 Dec 01 12:23:26 523764 22.1 0.8 0.08 219 89 3:2E+6:4II GA0920:01067763 06:05:33.4 +03:50:02 15.4 0.11 151 1.00 35.4%
238077 2018 Dec 02 06:03:55 04VY130 22.8 0.9 0.25 145 59 3:2E GA1060:00825059 05:13:14.3 +16:43:38 16.8 0.19 169 1.00 33.0%
305009 2018 Dec 19 07:31:51 523746 21.1 0.9 0.11 96 39 CENTAURR GA1260:01057486 04:05:13.3 +36:29:04 16.1 0.12 154 1.00 33.8%
321674 2019 Jan 06 05:29:00 14YY49 22.8 3.8 0.26 58 24 CENTAURR GA0900:02284958 07:03:33.1 +01:13:35 16.6 0.20 159 1.00 31.3%
338281 2019 Nov 13 07:53:46 8405 22.7 0.2 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 0.1 0.08 191 78 CENTAURR UC4-668-024120 04:09:20.5 +43:35:33 15.8 0.14 154 1.00 41.1%
310875 2019 Dec 13 08:15:02 54598 19.2 0.1 0.08 191 78 CENTAURR UC4-667-021829 04:01:55.1 +43:18:32 15.4 0.16 154 1.00 48.9%
338295 2019 Dec 16 04:47:39 8405 22.6 0.2 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 0.9 0.11 525 214 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 1.0 0.38 240 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 0.2 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 3.0 0.32 72 30 CENTAURR GA1260:03019228 06:59:27.2 +37:05:53 7.9 0.07 161 1.00 48.9%
361374 2020 Oct 18 08:15:04 54598 19.3 0.1 0.08 191 78 CENTAURR GA1340:02565141 04:56:42.0 +44:18:49 15.7 0.03 124 1.00 45.7%
311046 2020 Oct 18 08:16:37 54598 19.3 0.1 0.08 191 78 CENTAURR UC4-672-032094 04:56:42.0 +44:18:50 15.6 0.04 124 1.00 50.9%
363957 2020 Oct 21 11:36:22 523597 22.8 0.2 0.14 110 45 CENTAURR GA1080:00204642 01:56:32.2 +19:04:27 15.0 0.09 171 1.00 36.0%

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