RECON: TNO occultation with 523713

Event between (523713) 14JX80 and star GA0940:06156588 with event index number of 2377526

Geocentric closest approach at 2026/04/26 09:30:53 UTC

J2000 position of star is 18:07:59.3 +04:58:11
Equinox of date position of star is 18:09:04.5 +04:58:27
Stellar brightness G=15.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 114 degrees from the moon. Moon is 74% illuminated.
TNO apparent brightness V=22.0

[RECON map]
TNO is 36.8 AU from the Sun and 36.3 AU from the Earth.
The TNO is moving 16.3 km/sec on the sky relative to the star, or, 2.2 arcsec/hr.
The 1-sigma error in the time of the event is 128 seconds.
The 1-sigma cross-track error in the shadow position is 2572 km.
The sky-plane scale is 26332.4 km/arcsec.

The TNO has an absolute magnitude Hv=6.2
Diameter=340.4 km assuming a 5% albedo -- 20.9 sec chord
Diameter=139.0 km assuming a 30% albedo -- 8.5 sec chord
Dynamical classification is 5:2EEE+5:2EII
 
 
 
 
 
 

Star training set for 523713, (2026/04/26 09:31UT)
Object            RA         Dec     mag  sep  mel
Vega           18:37:49.7 +38:48:33  0.0 34.45 108
60Bet Oph      17:44:46.4 +04:33:29  2.8  6.12 108
73 Oph         18:10:52.5 +04:00:00  6.0  1.05 115
PPM 165293     18:11:03.0 +04:36:36  7.6  0.57 114
PPM 165248     18:09:53.8 +05:16:45  9.5  0.34 114
PPM 165232     18:09:25.8 +05:09:17 10.7  0.18 114
523713         18:09:17.2 +04:58:31 15.0       114
Positions are for equinox of date

This table contains the target star visibility for the RECON network. The observing range has been set to a maximum of 5.0 sigma about the mid-time.
The median site spacing is 15.1 km RECON observability=1.0 and success probability=21.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 09:35:23 -16.4 AT Up 40.2 154.0 Up 09:24:12 - 09:46:35 -418
Kamloops 09:35:59 -22.4 Dark Up 36.2 136.4 Up 09:24:47 - 09:47:10 -1173
Kelowna 09:35:55 -22.8 Dark Up 37.2 137.0 Up 09:24:44 - 09:47:07 -1205
Peachland 09:35:55 -23.0 Dark Up 37.1 136.6 Up 09:24:44 - 09:47:07 -1228
Summerland 09:35:55 -23.1 Dark Up 37.3 136.6 Up 09:24:43 - 09:47:06 -1237
Penticton 09:35:54 -23.2 Dark Up 37.4 136.7 Up 09:24:43 - 09:47:06 -1238
Oliver 09:35:54 -23.5 Dark Up 37.6 136.5 Up 09:24:43 - 09:47:06 -1269
Dunrhomin 09:34:50 -25.1 Dark Up 50.8 149.1 Up 09:23:39 - 09:46:02 -1270
Anarchist Mountain Observatory 09:35:53 -23.6 Dark Up 37.8 136.6 Up 09:24:42 - 09:47:05 -1275
Tonasket 09:35:53 -23.9 Dark Up 38.0 136.4 Up 09:24:41 - 09:47:04 -1305
Okanogan 09:35:53 -24.2 Dark Up 38.2 136.0 Up 09:24:41 - 09:47:04 -1340
Brewster 09:35:53 -24.5 Dark Up 38.3 135.6 Up 09:24:41 - 09:47:04 -1373
Manson/Chelan 09:35:53 -24.8 Dark Up 38.3 135.1 Up 09:24:42 - 09:47:05 -1408
Wenatchee 09:35:52 -25.3 Dark Up 38.5 134.7 Up 09:24:40 - 09:47:03 -1457
Victoria 09:36:03 -25.1 Dark Up 36.3 131.9 Up 09:24:52 - 09:47:15 -1491
Ellensburg 09:35:53 -25.7 Dark Up 38.7 134.2 Up 09:24:42 - 09:47:05 -1503
PNWRO 09:35:47 -26.1 Dark Up 40.2 135.4 Up 09:24:35 - 09:46:58 -1515
Yakima 09:35:52 -26.1 Dark Up 39.0 133.9 Up 09:24:40 - 09:47:03 -1540
Toppenish/White Swan 09:35:52 -26.2 Dark Up 39.2 134.0 Up 09:24:40 - 09:47:03 -1551
Goldendale 09:35:52 -26.9 Dark Up 39.4 133.2 Up 09:24:40 - 09:47:03 -1620
The Dalles 09:35:52 -27.2 Dark Up 39.4 132.6 Up 09:24:40 - 09:47:03 -1656
Maupin 09:35:52 -27.5 Dark Up 39.7 132.5 Up 09:24:40 - 09:47:03 -1689
Sisters 09:35:51 -28.5 Dark Up 40.0 131.4 Up 09:24:39 - 09:47:02 -1791
Bend 09:35:49 -28.6 Dark Up 40.3 131.5 Up 09:24:38 - 09:47:01 -1800
Oregon Observatory 09:35:48 -28.8 Dark Up 40.4 131.3 Up 09:24:37 - 09:47:00 -1821
North Lake 09:35:46 -29.2 Dark Up 41.1 131.4 Up 09:24:34 - 09:46:57 -1853
Lakeview 09:35:42 -30.0 Dark Up 42.1 131.3 Up 09:24:30 - 09:46:53 -1922
Chiloquin 09:35:47 -30.1 Dark Up 41.0 130.0 Up 09:24:36 - 09:46:59 -1960
Cedarville 09:35:40 -30.5 Dark Up 42.6 131.1 Up 09:24:29 - 09:46:52 -1972
Klamath Falls 09:35:46 -30.4 Dark Up 41.2 129.8 Up 09:24:35 - 09:46:58 -1987
Fall River/Burney 09:35:43 -31.4 Dark Up 42.2 129.4 Up 09:24:32 - 09:46:55 -2075
Susanville 09:35:39 -31.7 Dark Up 43.0 129.8 Up 09:24:28 - 09:46:51 -2095
Tonopah 09:35:23 -32.4 Dark Up 46.6 131.8 Up 09:24:12 - 09:46:35 -2128
Gimple 09:35:39 -32.0 Dark Up 43.1 129.3 Up 09:24:28 - 09:46:51 -2131
Reno 09:35:35 -32.1 Dark Up 44.1 130.0 Up 09:24:24 - 09:46:47 -2132
Greenville 09:35:39 -32.0 Dark Up 43.0 129.2 Up 09:24:28 - 09:46:51 -2135
Portola 09:35:38 -32.1 Dark Up 43.5 129.5 Up 09:24:26 - 09:46:49 -2141
Yerington 09:35:32 -32.4 Dark Up 44.8 130.3 Up 09:24:20 - 09:46:43 -2147
Quincy 09:35:38 -32.2 Dark Up 43.2 129.1 Up 09:24:26 - 09:46:49 -2153
Hawthorne 09:35:29 -32.6 Dark Up 45.4 130.6 Up 09:24:17 - 09:46:40 -2161
Carson City 09:35:33 -32.4 Dark Up 44.3 129.8 Up 09:24:22 - 09:46:45 -2163
Patrick 09:35:04 -33.2 Dark Up 50.3 133.6 Up 09:23:53 - 09:46:16 -2172
Indian Springs 09:35:14 -33.0 Dark Up 48.4 132.4 Up 09:24:03 - 09:46:26 -2174
Henderson 09:35:09 -33.2 Dark Up 49.2 132.8 Up 09:23:57 - 09:46:20 -2181
Gardnerville 09:35:32 -32.6 Dark Up 44.5 129.6 Up 09:24:21 - 09:46:44 -2182
George/Scottsdale 09:34:52 -33.5 Dark Up 52.6 134.6 Up 09:23:41 - 09:46:04 -2198
Kingman/Dolan Springs 09:35:04 -33.4 Dark Up 50.3 133.1 Up 09:23:53 - 09:46:16 -2202
Beatty 09:35:18 -33.2 Dark Up 47.6 131.4 Up 09:24:07 - 09:46:30 -2205
Laughlin/Bullhead City 09:35:06 -33.7 Dark Up 50.0 132.5 Up 09:23:55 - 09:46:18 -2233
Lee Vining 09:35:28 -33.3 Dark Up 45.5 129.6 Up 09:24:17 - 09:46:40 -2237
Bishop 09:35:25 -33.5 Dark Up 46.3 129.9 Up 09:24:14 - 09:46:37 -2252
Mohave Valley 09:35:05 -33.9 Dark Up 50.2 132.3 Up 09:23:53 - 09:46:16 -2257
Lake Havasu City 09:35:02 -34.1 Dark Up 50.6 132.2 Up 09:23:50 - 09:46:13 -2277
Parker 09:35:02 -34.4 Dark Up 50.9 131.9 Up 09:23:50 - 09:46:13 -2305
Yuma 09:34:57 -35.7 Dark Up 51.6 130.1 Up 09:23:46 - 09:46:09 -2450
Calipatria 09:35:02 -35.8 Dark Up 50.8 129.5 Up 09:23:51 - 09:46:14 -2465
Idyllwild 09:35:09 -35.9 Dark Up 49.6 128.6 Up 09:23:57 - 09:46:20 -2480
Wildwood 09:35:16 -36.4 Dark Up 48.2 126.9 Up 09:24:04 - 09:46:27 -2554

Azimuth is measured in degrees eastward from north. North is at an azimuth of 0, due East is at an azimuth of 90 degrees, due South is 180, and due West is 270.

Do not use the listing below for the RECON CPC 1100 telescopes. This is provided for other non-team facilities.

Star training set for 523713, (2026/04/26 09:31UT)
Object            RA         Dec     mag  sep  mel
Vega           18:36:56.7 +38:47:07  0.0 34.45 108
60Bet Oph      17:43:28.3 +04:34:06  2.8  6.12 108
73 Oph         18:09:34.0 +03:59:36  6.0  1.05 115
PPM 165293     18:09:44.9 +04:36:12  7.6  0.57 114
PPM 165248     18:08:36.1 +05:16:24  9.5  0.34 114
PPM 165232     18:08:08.1 +05:08:57 10.7  0.18 114
523713         18:07:59.3 +04:58:11 15.0       114
Positions are for J2000

Event circumstances last updated at 2022/01/12 23:40:59 UT

Marc W. Buie, Southwest Research Institute

RECON