RECON: TNO occultation with 533559

Event between (533559) 14JG80 and star GA0740:07896762 with event index number of 2587964

Geocentric closest approach at 2026/08/11 05:41:26 UTC

J2000 position of star is 17:24:07.8 -15:41:26
Equinox of date position of star is 17:25:26.5 -15:42:36
Stellar brightness G=16.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 142 degrees from the moon. Moon is 3% illuminated.
TNO apparent brightness V=22.3

[RECON map]
TNO is 26.6 AU from the Sun and 26.1 AU from the Earth.
The TNO is moving 13.0 km/sec on the sky relative to the star, or, 2.5 arcsec/hr.
The 1-sigma error in the time of the event is 171 seconds.
The 1-sigma cross-track error in the shadow position is 1902 km.
The sky-plane scale is 18902.2 km/arcsec.

The TNO has an absolute magnitude Hv=7.9
Diameter=157.8 km assuming a 5% albedo -- 12.3 sec chord
Diameter=64.4 km assuming a 30% albedo -- 5.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 533559, (2026/08/11 05:42UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:02.6 -26:29:19  0.9 16.66 132
35Eta Oph      17:11:54.4 -15:45:21  2.6  3.31 139
PPM 232892     17:19:51.4 -16:20:17  5.9  1.53 141
PPM 233011     17:25:08.2 -16:03:41  7.0  0.37 142
PPM 233022     17:25:55.4 -15:50:23  9.4  0.14 142
533559         17:25:39.5 -15:42:47 16.9       142
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 22.4 km RECON observability=1.0 and success probability=3.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 05:36:50 -16.4 AT Down 20.8 203.2 Low 05:22:05 - 05:51:34 5990
Victoria 05:37:03 -16.8 AT Down 23.5 200.5 Low 05:22:18 - 05:51:47 5969
Peachland 05:36:46 -17.3 AT Down 21.5 203.9 Low 05:22:01 - 05:51:30 5919
Kelowna 05:36:46 -17.4 AT Down 21.3 204.2 Low 05:22:01 - 05:51:30 5916
Summerland 05:36:47 -17.5 AT Down 21.6 204.1 Low 05:22:03 - 05:51:32 5908
Penticton 05:36:46 -17.6 AT Down 21.6 204.2 Low 05:22:02 - 05:51:31 5900
Oliver 05:36:45 -17.9 AT Down 21.9 204.2 Low 05:22:00 - 05:51:29 5880
Anarchist Mountain Observatory 05:36:44 -18.1 Dark Down 22.0 204.5 Low 05:21:59 - 05:51:28 5864
Okanogan 05:36:44 -18.5 Dark Down 22.7 204.3 Low 05:21:59 - 05:51:28 5833
Manson/Chelan 05:36:47 -18.6 Dark Down 23.3 203.9 Low 05:22:03 - 05:51:32 5824
Brewster 05:36:47 -18.6 Dark Down 23.0 204.2 Low 05:22:03 - 05:51:32 5824
Wenatchee 05:36:49 -18.9 Dark Down 23.7 203.8 Low 05:22:05 - 05:51:34 5802
Ellensburg 05:36:47 -19.2 Dark Down 24.2 203.6 Low 05:22:03 - 05:51:32 5784
Yakima 05:36:48 -19.5 Dark Down 24.6 203.7 Low 05:22:03 - 05:51:32 5760
Toppenish/White Swan 05:36:49 -19.7 Dark Down 24.7 203.9 Low 05:22:04 - 05:51:33 5741
The Dalles 05:36:52 -20.0 Dark Down 25.6 203.3 Low 05:22:07 - 05:51:36 5721
Maupin 05:36:53 -20.4 Dark Down 26.0 203.4 Low 05:22:08 - 05:51:37 5691
PNWRO 05:36:40 -20.6 Dark Down 24.6 205.5 Low 05:21:56 - 05:51:25 5666
Sisters 05:36:52 -20.8 Dark Down 26.9 203.1 Low 05:22:08 - 05:51:37 5654
Bend 05:36:51 -21.1 Dark Down 27.1 203.4 Low 05:22:06 - 05:51:35 5630
Oregon Observatory 05:36:52 -21.2 Dark Down 27.3 203.3 Low 05:22:08 - 05:51:37 5623
Sleaford 05:35:56 -19.7 Dark Down 15.1 216.6 Really Low 05:21:12 - 05:50:41 5616
Chiloquin 05:36:54 -22.0 Dark Down 28.6 203.2 Low 05:22:10 - 05:51:39 5554
Klamath Falls 05:36:54 -22.3 Dark Down 28.9 203.3 Low 05:22:10 - 05:51:39 5528
Fall River/Burney 05:36:52 -23.4 Dark Down 29.9 204.0 Low 05:22:07 - 05:51:36 5435
Cedarville 05:36:46 -23.6 Dark Down 29.1 205.1 Low 05:22:01 - 05:51:30 5422
Greenville 05:36:47 -24.3 Dark Down 30.6 204.7 Up 05:22:03 - 05:51:32 5356
Gimple 05:36:47 -24.3 Dark Down 30.5 204.8 Up 05:22:03 - 05:51:32 5353
Quincy 05:36:49 -24.4 Dark Down 30.7 204.7 Up 05:22:04 - 05:51:33 5342
Portola 05:36:47 -24.8 Dark Down 30.7 205.3 Up 05:22:03 - 05:51:32 5315
Reno 05:36:44 -25.3 Dark Down 30.7 206.0 Up 05:21:59 - 05:51:28 5272
Carson City 05:36:43 -25.6 Dark Down 31.0 206.1 Up 05:21:58 - 05:51:27 5246
Gardnerville 05:36:43 -25.8 Dark Down 31.3 206.2 Up 05:21:59 - 05:51:28 5226
Yerington 05:36:40 -26.0 Dark Down 31.0 206.8 Up 05:21:56 - 05:51:25 5207
Hawthorne 05:36:35 -26.6 Dark Down 31.2 207.5 Up 05:21:51 - 05:51:20 5153
Lee Vining 05:36:39 -26.8 Dark Down 31.9 207.1 Up 05:21:55 - 05:51:24 5132
Bishop 05:36:36 -27.7 Dark Down 32.2 208.1 Up 05:21:52 - 05:51:21 5059
Beatty 05:36:27 -28.8 Dark Down 32.0 209.9 Up 05:21:43 - 05:51:12 4959
Wildwood 05:36:38 -30.1 Dark Down 35.1 208.9 Up 05:21:54 - 05:51:23 4820
Dunrhomin 05:35:32 -30.6 Dark Down 24.1 219.8 Low 05:20:47 - 05:50:16 4754
CU-SBO 05:35:33 -30.8 Dark Down 24.4 219.8 Low 05:20:48 - 05:50:17 4739
Laughlin/Bullhead City 05:36:16 -31.2 Dark Down 32.6 212.6 Up 05:21:31 - 05:51:00 4737
Patrick 05:36:10 -31.4 Dark Down 32.0 213.2 Up 05:21:26 - 05:50:55 4727
Idyllwild 05:36:28 -31.3 Dark Down 34.7 211.0 Up 05:21:43 - 05:51:12 4714
Lake Havasu City 05:36:15 -31.9 Dark Down 33.0 213.1 Up 05:21:30 - 05:50:59 4673
Calipatria 05:36:21 -32.4 Dark Down 34.7 212.4 Up 05:21:37 - 05:51:06 4615
Yuma 05:36:17 -33.2 Dark Down 34.6 213.5 Up 05:21:32 - 05:51:01 4543
George/Scottsdale 05:36:01 -33.7 Dark Down 32.5 215.8 Up 05:21:16 - 05:50:45 4508

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 533559, (2026/08/11 05:42UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 16.66 132
35Eta Oph      17:10:22.7 -15:43:29  2.6  3.31 139
PPM 232892     17:18:19.3 -16:18:42  5.9  1.53 141
PPM 233011     17:23:36.2 -16:02:18  7.0  0.37 142
PPM 233022     17:24:23.6 -15:49:03  9.4  0.14 142
533559         17:24:07.8 -15:41:26 16.9       142
Positions are for J2000

Event circumstances last updated at 2022/11/04 04:23:54 UT

Marc W. Buie, Southwest Research Institute

RECON