RECON: TNO occultation with 533398

Event between (533398) 14GA54 and star GA0760:11129562 with event index number of 2164384

Geocentric closest approach at 2026/06/30 08:36:26 UTC

J2000 position of star is 17:57:48.8 -13:04:20
Equinox of date position of star is 17:59:11.7 -13:04:23
Stellar brightness G=16.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 19 degrees from the moon. Moon is 100% illuminated.
Apparent brightness V=22.1

[RECON map]
Object is 31.1 AU from the Sun and 30.1 AU from the Earth.
Apparent velocity is 23.2 km/sec on the sky relative to the star, or, 3.8 arcsec/hr.
The 1-sigma error in the time of the event is 216 seconds.
The 1-sigma cross-track error in the shadow position is 1774 km.
The sky-plane scale is 21812.9 km/arcsec.

The object has an absolute magnitude Hv=7.2
Diameter=215.8 km assuming a 5% albedo -- 9.3 sec chord
Diameter=88.1 km assuming a 30% albedo -- 3.8 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 533398, (2026/06/30 08:36UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:02.2 -26:29:18  0.9 24.65  33
35Eta Oph      17:11:54.0 -15:45:21  2.6 11.79  27
PPM 233722     17:55:36.1 -11:20:27  6.5  1.95  21
PPM 233791     17:58:37.1 -13:39:17  8.0  0.61  19
PPM 233821     17:59:27.8 -13:03:42  9.5  0.04  19
533398         17:59:18.5 -13:04:23 16.5        19
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 4.2 sigma about the mid-time.
The median site spacing is 21.2 km RECON observability=1.0 and success probability=0.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 08:35:15 -15.9 AT Up 24.5 198.7 Low 08:20:15 - 08:50:15 9411
Kelowna 08:35:11 -16.6 AT Up 25.0 199.7 Low 08:20:11 - 08:50:11 9358
Peachland 08:35:12 -16.7 AT Up 25.2 199.4 Low 08:20:12 - 08:50:12 9356
Summerland 08:35:12 -16.9 AT Up 25.3 199.6 Low 08:20:12 - 08:50:12 9347
Penticton 08:35:12 -16.9 AT Up 25.4 199.7 Low 08:20:12 - 08:50:12 9342
Victoria 08:35:23 -18.2 Dark Up 27.1 195.8 Low 08:20:23 - 08:50:23 9327
Oliver 08:35:11 -17.3 AT Up 25.7 199.7 Low 08:20:11 - 08:50:11 9323
Sleaford 08:34:38 -12.4 AT Up 19.3 212.9 Really Low 08:19:38 - 08:49:38 9315
Anarchist Mountain Observatory 08:35:11 -17.4 AT Up 25.8 200.0 Low 08:20:11 - 08:50:11 9312
Okanogan 08:35:11 -18.1 Dark Up 26.5 199.9 Low 08:20:11 - 08:50:11 9278
Brewster 08:35:11 -18.4 Dark Up 26.8 199.7 Low 08:20:11 - 08:50:11 9265
Manson/Chelan 08:35:12 -18.6 Dark Up 27.1 199.3 Low 08:20:12 - 08:50:12 9257
Wenatchee 08:35:12 -19.1 Dark Up 27.5 199.2 Low 08:20:12 - 08:50:12 9232
Ellensburg 08:35:13 -19.5 Dark Up 28.0 199.1 Low 08:20:13 - 08:50:13 9210
Yakima 08:35:12 -19.9 Dark Up 28.4 199.1 Low 08:20:12 - 08:50:12 9187
Toppenish/White Swan 08:35:11 -20.1 Dark Up 28.5 199.3 Low 08:20:11 - 08:50:11 9172
The Dalles 08:35:13 -21.0 Dark Up 29.4 198.6 Low 08:20:13 - 08:50:13 9134
PNWRO 08:35:06 -20.4 Dark Up 28.5 201.0 Low 08:20:06 - 08:50:06 9133
Maupin 08:35:13 -21.4 Dark Up 29.8 198.8 Low 08:20:13 - 08:50:13 9108
Sisters 08:35:13 -22.3 Dark Up 30.8 198.4 Up 08:20:13 - 08:50:13 9060
Bend 08:35:13 -22.5 Dark Up 30.9 198.8 Up 08:20:13 - 08:50:13 9042
Oregon Observatory 08:35:14 -22.7 Dark Up 31.1 198.7 Up 08:20:14 - 08:50:14 9033
Chiloquin 08:35:14 -24.0 Dark Up 32.5 198.5 Up 08:20:14 - 08:50:14 8954
Klamath Falls 08:35:13 -24.4 Dark Up 32.8 198.6 Up 08:20:13 - 08:50:13 8931
Cedarville 08:35:07 -24.9 Dark Up 33.0 200.6 Up 08:20:07 - 08:50:07 8865
Fall River/Burney 08:35:11 -25.5 Dark Up 33.8 199.3 Up 08:20:11 - 08:50:11 8848
Greenville 08:35:09 -26.4 Dark Up 34.5 200.0 Up 08:20:09 - 08:50:09 8781
Gimple 08:35:09 -26.4 Dark Up 34.5 200.1 Up 08:20:09 - 08:50:09 8780
Quincy 08:35:09 -26.6 Dark Up 34.7 200.1 Up 08:20:09 - 08:50:09 8767
Portola 08:35:07 -26.7 Dark Up 34.7 200.6 Up 08:20:07 - 08:50:07 8752
Reno 08:35:04 -26.8 Dark Up 34.8 201.4 Up 08:20:04 - 08:50:04 8726
Carson City 08:35:05 -27.2 Dark Up 35.1 201.5 Up 08:20:05 - 08:50:05 8700
Gardnerville 08:35:04 -27.4 Dark Up 35.3 201.6 Up 08:20:04 - 08:50:04 8682
Yerington 08:35:02 -27.3 Dark Up 35.1 202.3 Up 08:20:02 - 08:50:02 8678
Hawthorne 08:35:00 -27.7 Dark Up 35.4 203.0 Up 08:20:00 - 08:50:00 8638
Lee Vining 08:35:01 -28.3 Dark Up 36.1 202.6 Up 08:20:01 - 08:50:01 8605
Dunrhomin 08:34:18 -23.2 Dark Up 28.8 216.5 Low 08:19:18 - 08:49:18 8562
Bishop 08:34:59 -28.8 Dark Up 36.4 203.6 Up 08:19:59 - 08:49:59 8551
Nikitin 08:34:18 -23.4 Dark Up 28.9 216.6 Low 08:19:18 - 08:49:18 8549
CU-SBO 08:34:18 -23.5 Dark Up 29.0 216.5 Low 08:19:18 - 08:49:18 8546
Beatty 08:34:53 -29.0 Dark Up 36.3 205.6 Up 08:19:53 - 08:49:53 8494
Patrick 08:34:41 -30.0 Dark Up 36.5 209.3 Up 08:19:41 - 08:49:41 8339
Laughlin/Bullhead City 08:34:44 -30.3 Dark Up 37.0 208.6 Up 08:19:44 - 08:49:44 8331
Wildwood 08:34:57 -32.1 Dark Up 39.5 204.4 Up 08:19:57 - 08:49:57 8307
Lake Havasu City 08:34:42 -30.9 Dark Up 37.5 209.1 Up 08:19:42 - 08:49:42 8275
Idyllwild 08:34:50 -32.1 Dark Up 39.1 206.7 Up 08:19:50 - 08:49:50 8252
Calipatria 08:34:46 -32.5 Dark Up 39.2 208.3 Up 08:19:46 - 08:49:46 8186
George/Scottsdale 08:34:33 -31.2 Dark Up 37.2 212.1 Up 08:19:33 - 08:49:33 8176
Yuma 08:34:42 -32.8 Dark Up 39.2 209.5 Up 08:19:42 - 08:49:42 8137

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 533398, (2026/06/30 08:36UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 24.65  33
35Eta Oph      17:10:22.7 -15:43:29  2.6 11.79  27
PPM 233722     17:54:07.6 -11:20:15  6.5  1.95  21
PPM 233791     17:57:07.0 -13:39:12  8.0  0.61  19
PPM 233821     17:57:58.1 -13:03:39  9.5  0.04  19
533398         17:57:48.8 -13:04:20 16.5        19
Positions are for J2000

Event circumstances last updated at 2024/06/19 21:29:52 UT

Marc W. Buie, Southwest Research Institute

RECON