RECON TNO event watchlist

This table lists the candidates for TNO occultation for the next two years that are visible from the entire network. Green lines have cross-track errors less than 1000 km. Yellow lines are below 2000 km. Orange lines are below 3000 km. Red lines are below 4000 km.

This list was last updated at 2017/03/22 16:02:45 UT

Idx ET Desig Diam(5%) Diam(30%) DES Classification TNO pos err StarID RA Dec mag minsep selong RECON Prob
68801 2017 Mar 28 10:27:25 5145 229 94 CENTAURR 0.22 UC4-402-073169 17:57:44.8 -09:39:06 16.5 0.04 98 1.00 9.0%
141625 2017 Apr 16 07:33:33 14WZ508 159 65 CENTAURR 0.28 UC4-473-046251 10:52:09.8 +04:30:15 15.1 0.21 136 1.00 8.0%
73969 2017 Apr 21 08:04:00 434194 209 85 CLASSICAL 0.21 UC4-447-053664 12:29:01.6 -00:40:17 15.9 0.23 156 1.00 8.5%
117448 2017 Jun 14 09:16:13 11HZ102 86 35 CLASSICAL 0.31 UC4-347-167101 19:03:33.4 -20:44:23 15.5 0.15 158 1.00 13.2%
135602 2017 Jul 04 08:09:59 14GV53 322 132 SCATNEAR 0.41 UC4-433-066391 16:28:27.8 -03:31:32 14.5 0.02 140 1.00 8.0%
117474 2017 Jul 26 06:39:47 11HZ102 86 35 CLASSICAL 0.31 UC4-346-170487 19:00:11.0 -20:49:38 14.6 0.15 161 1.00 13.2%
97622 2017 Jul 30 06:00:54 01KO77 185 75 SCATEXTD 0.23 UC4-370-093108 17:33:22.6 -16:06:41 13.8 0.28 136 1.00 10.4%
138741 2017 Aug 13 08:23:08 14LN28 134 55 CENTAURR 0.55 UC4-410-139206 21:09:02.9 -08:02:37 12.0 0.03 171 1.00 7.8%
79075 2017 Aug 20 08:52:35 07NC7 137 56 CENTAURR 0.22 UC4-434-118238 23:05:33.4 -03:13:53 14.8 0.07 161 1.00 10.0%
85988 2017 Oct 07 07:27:19 8405 91 37 CENTAURR 0.19 UC4-649-024024 04:59:00.9 +39:42:15 16.1 0.16 115 1.00 12.4%
84861 2017 Oct 26 09:12:58 13WV107 57 23 CENTAURR 0.14 UC4-543-040693 07:15:53.9 +18:28:30 16.1 0.10 105 1.00 69.4%
151419 2017 Oct 27 11:50:52 02VT130 417 170 CLASSICAL 0.12 UC4-571-016081 05:15:46.2 +24:11:53 16.4 0.02 134 1.00 33.3%
91011 2017 Nov 14 10:15:54 15875 240 98 3:2E 1.05 UC4-591-019461 05:31:14.6 +28:02:25 14.7 0.10 148 1.00 10.6%
108640 2017 Nov 14 11:56:32 06QJ181 331 135 3:1EE+3:1II 0.25 UC4-540-017875 05:40:05.8 +17:59:43 16.0 0.05 146 1.00 12.1%
170072 2017 Nov 19 09:04:03 119315 72 30 CENTAURR 0.36 UC4-655-045390 06:46:44.1 +40:58:21 11.2 0.10 135 1.00 18.3%
88493 2017 Nov 20 10:34:54 00SR331 106 43 5:2EEE 0.37 UC4-543-035960 06:53:10.4 +18:30:44 15.1 0.25 135 1.00 10.7%
106514 2017 Nov 20 10:47:23 98WS31 134 55 3:2E 0.31 UC4-597-017239 05:17:04.5 +29:19:44 12.6 0.11 157 1.00 7.7%
92040 2017 Nov 25 05:29:57 69990 132 54 3:2E 1.66 UC4-551-018644 05:46:53.3 +20:06:36 16.4 0.10 156 1.00 12.6%
125105 2017 Dec 01 07:14:48 450265 331 135 3:2E 0.11 UC4-586-035913 06:55:41.7 +27:06:31 14.9 0.21 146 1.00 12.1%
104254 2017 Dec 09 05:24:15 456826 182 74 3:2E 0.18 UC4-521-011992 05:20:26.7 +14:11:51 14.9 0.24 171 1.00 18.1%
95650 2017 Dec 10 08:00:29 48639 603 246 SCATNEAR 0.14 UC4-542-006071 03:16:46.1 +18:17:27 15.5 0.06 153 1.00 10.4%
94638 2017 Dec 11 03:46:20 149349 263 107 5:3EE 0.17 UC4-536-005733 03:14:31.4 +17:05:47 15.4 0.24 152 1.00 10.8%
94685 2017 Dec 11 08:02:07 15875 240 98 3:2E 1.05 UC4-591-018990 05:28:00.4 +28:00:52 16.3 0.11 174 1.00 38.5%
95741 2017 Dec 13 04:55:46 69986 159 65 3:2E 0.81 UC4-527-017458 05:51:15.5 +15:21:27 15.3 0.08 170 1.00 10.6%
94686 2017 Dec 13 11:59:40 15875 240 98 3:2E 1.05 UC4-591-018936 05:27:43.7 +28:00:37 15.8 0.07 175 1.00 26.2%
95743 2017 Dec 18 09:33:22 69986 159 65 3:2E 0.81 UC4-527-017314 05:50:43.7 +15:20:55 14.8 0.16 172 1.00 11.1%
92835 2017 Dec 26 08:56:57 00SR331 106 43 5:2EEE 0.37 UC4-543-035088 06:49:52.4 +18:32:39 16.1 0.12 172 1.00 19.3%
95962 2017 Dec 27 08:00:55 98WG24 295 121 CLASSICAL 0.38 UC4-567-034942 07:00:47.6 +23:18:47 15.3 0.02 172 1.00 17.3%
93425 2017 Dec 30 08:43:37 05UN524 84 34 CENTAURR 0.58 UC4-647-039174 06:35:29.3 +39:15:33 15.5 0.19 164 1.00 13.4%
95372 2018 Jan 02 12:21:33 33340 302 123 3:2E 0.24 UC4-558-035961 06:54:08.5 +21:30:03 16.2 0.09 178 1.00 15.9%
104973 2018 Feb 27 08:56:14 131697 138 56 5:4E 0.35 UC4-531-048534 09:16:25.9 +16:09:53 14.7 0.03 158 1.00 9.0%
124035 2018 May 10 09:34:01 04KV18 96 39 CENTAURR 0.28 UC4-367-097218 17:39:03.5 -16:38:44 16.4 0.17 144 1.00 8.4%
129969 2018 May 20 06:58:14 468861 145 59 CENTAURR 0.25 UC4-642-051089 15:21:31.9 +38:12:46 16.0 0.28 122 1.00 15.0%
149011 2018 Sep 01 09:41:54 363330 417 170 CLASSICAL 0.10 UC4-393-132709 21:55:27.7 -11:34:17 14.9 0.02 168 1.00 13.4%
153164 2018 Sep 12 11:25:44 10TH 88 36 CENTAURR 0.07 UC4-471-011981 05:33:36.8 +04:01:44 16.0 0.12 87 1.00 35.1%
156261 2018 Oct 18 05:47:39 8405 91 37 CENTAURR 0.19 UC4-652-028542 05:11:14.7 +40:17:39 15.5 0.13 123 1.00 22.0%
155121 2018 Oct 18 07:11:10 248835 76 31 CENTAURR 0.73 UC4-667-025977 04:31:16.8 +43:16:25 13.9 0.17 128 1.00 14.3%
155122 2018 Oct 20 07:45:15 248835 76 31 CENTAURR 0.73 UC4-667-025918 04:30:55.4 +43:16:45 16.3 0.22 130 1.00 13.7%
151346 2018 Oct 25 06:14:37 02QX47 108 44 CENTAURR 0.24 UC4-537-002803 01:34:06.0 +17:21:05 14.3 0.05 172 1.00 10.3%
166696 2018 Nov 16 09:12:46 55636 1259 514 SCATEXTD 0.06 UC4-627-004203 01:20:19.9 +35:19:33 16.1 0.15 148 1.00 10.4%
166798 2018 Nov 30 07:43:03 84719 550 224 3:2E+6:4II 0.10 UC4-589-008717 03:33:26.4 +27:45:44 15.8 0.02 167 1.00 19.4%
171418 2018 Dec 14 10:45:55 341275 115 47 CENTAURR 0.39 UC4-691-031494 04:53:49.9 +48:09:55 16.0 0.23 154 1.00 17.7%
173555 2018 Dec 20 12:04:21 14YX49 107 44 CENTAURR 0.24 UC4-617-044708 08:49:48.6 +33:19:25 16.0 0.12 140 1.00 9.3%
169816 2018 Dec 23 04:13:13 470443 794 324 SCATEXTD 0.17 UC4-611-016946 04:55:21.4 +32:11:16 14.9 0.05 162 1.00 11.1%
170653 2018 Dec 24 02:23:19 145451 759 310 SCATNEAR 0.04 UC4-534-010144 04:52:51.2 +16:45:24 13.5 0.09 161 1.00 28.8%
170315 2018 Dec 27 04:19:56 120347 1000 408 SCATEXTD 0.19 UC4-561-142104 23:24:24.9 +22:06:10 16.0 0.10 86 1.00 7.1%
168625 2019 Jan 03 08:08:33 01XR254 417 170 CLASSICAL 0.22 UC4-544-045429 08:15:54.0 +18:40:35 16.0 0.00 160 1.00 12.4%
179173 2019 Jan 28 05:11:20 14YY49 58 24 CENTAURR 0.12 UC4-458-028181 06:59:55.5 +01:25:26 14.6 0.27 150 1.00 38.5%
179444 2019 Feb 04 02:45:09 472262 288 118 SCATNEAR 0.08 UC4-427-003442 02:49:02.1 -04:44:46 15.9 0.02 84 1.00 20.0%
180694 2019 Feb 19 03:35:05 119315 72 30 CENTAURR 0.36 UC4-655-045769 06:50:19.1 +40:59:30 16.3 0.17 128 1.00 13.8%

For all of these events 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. 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. An additional uncertainty of 0.05 arcsec is assumed for the uncertainty in the star position. "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