RECON: TNO occultation with 534074

Event between (534074) 14QZ441 and star GA1080:00208740 with event index number of 2244410

Geocentric closest approach at 2026/09/06 05:54:38 UTC

J2000 position of star is 01:58:57.8 +18:08:11
Equinox of date position of star is 02:00:16.2 +18:15:05
Stellar brightness G=14.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 65 degrees from the moon. Moon is 29% illuminated.
Apparent brightness V=22.5

[RECON map]
Object is 43.6 AU from the Sun and 43.0 AU from the Earth.
Apparent velocity is 14.8 km/sec on the sky relative to the star, or, 1.7 arcsec/hr.
The 1-sigma error in the time of the event is 347 seconds.
The 1-sigma cross-track error in the shadow position is 2670 km.
The sky-plane scale is 31159.9 km/arcsec.

The object has an absolute magnitude Hv=6.0
Diameter=398.1 km assuming a 5% albedo -- 25.3 sec chord
Diameter=162.5 km assuming a 30% albedo -- 10.3 sec chord
Dynamical classification is 5:3EE
 
 
 
 
 
 

Star training set for 534074, (2026/09/06 05:55UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:27.3 +16:33:39  0.8 37.43  31
6Bet Ari       01:56:07.2 +20:56:15  2.6  2.86  65
15 Ari         02:12:06.7 +19:37:30  5.7  3.08  62
PPM 117832     01:59:49.4 +18:24:12  8.4  0.20  65
PPM 117852     02:00:57.4 +18:23:39  9.0  0.18  65
534074         02:00:25.7 +18:15:54 14.8        65
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 2.6 sigma about the mid-time.
The median site spacing is 22.9 km RECON observability=1.0 and success probability=18.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 05:58:03 -27.2 Dark Down 23.2 89.4 Low 05:43:03 - 06:13:03 54
Victoria 05:58:19 -27.7 Dark Down 21.2 86.3 Low 05:43:19 - 06:13:19 3
Peachland 05:58:09 -28.1 Dark Down 23.6 89.5 Low 05:43:09 - 06:13:09 -15
Kelowna 05:58:08 -28.2 Dark Down 23.8 89.7 Low 05:43:08 - 06:13:08 -16
Summerland 05:58:09 -28.3 Dark Down 23.7 89.5 Low 05:43:09 - 06:13:09 -26
Penticton 05:58:10 -28.4 Dark Down 23.7 89.5 Low 05:43:10 - 06:13:10 -33
Oliver 05:58:12 -28.7 Dark Down 23.7 89.4 Low 05:43:12 - 06:13:12 -54
Anarchist Mountain Observatory 05:58:13 -28.9 Dark Down 23.9 89.4 Low 05:43:13 - 06:13:13 -69
Okanogan 05:58:17 -29.4 Dark Down 23.7 89.0 Low 05:43:17 - 06:13:17 -103
Brewster 05:58:19 -29.5 Dark Down 23.6 88.7 Low 05:43:19 - 06:13:19 -115
Manson/Chelan 05:58:21 -29.5 Dark Down 23.3 88.4 Low 05:43:21 - 06:13:21 -118
Wenatchee 05:58:24 -29.9 Dark Down 23.2 88.1 Low 05:43:24 - 06:13:24 -143
Ellensburg 05:58:26 -30.1 Dark Down 23.1 87.7 Low 05:43:26 - 06:13:26 -163
Yakima 05:58:29 -30.5 Dark Down 23.0 87.6 Low 05:43:29 - 06:13:29 -189
Toppenish/White Swan 05:58:30 -30.7 Dark Down 23.2 87.6 Low 05:43:30 - 06:13:30 -207
Sleaford 05:57:34 -29.9 Dark Down 32.0 101.8 Up 05:42:34 - 06:12:34 -213
The Dalles 05:58:36 -31.0 Dark Down 22.6 86.7 Low 05:43:36 - 06:13:36 -236
Maupin 05:58:38 -31.4 Dark Down 22.6 86.6 Low 05:43:38 - 06:13:38 -266
PNWRO 05:58:31 -31.6 Dark Down 24.2 88.5 Low 05:43:31 - 06:13:31 -271
Sisters 05:58:44 -31.9 Dark Down 22.2 85.9 Low 05:43:44 - 06:13:44 -311
Bend 05:58:45 -32.2 Dark Down 22.4 86.0 Low 05:43:45 - 06:13:45 -334
Oregon Observatory 05:58:46 -32.3 Dark Down 22.3 85.9 Low 05:43:46 - 06:13:46 -342
Chiloquin 05:58:54 -33.1 Dark Down 21.9 85.1 Low 05:43:54 - 06:13:54 -420
Klamath Falls 05:58:56 -33.5 Dark Down 22.0 85.0 Low 05:43:56 - 06:13:56 -446
Fall River/Burney 05:59:03 -34.6 Dark Down 22.2 84.8 Low 05:44:03 - 06:14:03 -540
Cedarville 05:58:58 -34.7 Dark Down 23.1 85.8 Low 05:43:58 - 06:13:58 -540
Greenville 05:59:07 -35.5 Dark Down 22.4 84.7 Low 05:44:07 - 06:14:07 -618
Gimple 05:59:07 -35.5 Dark Down 22.5 84.8 Low 05:44:07 - 06:14:07 -620
Quincy 05:59:08 -35.7 Dark Down 22.4 84.6 Low 05:44:08 - 06:14:08 -632
Portola 05:59:08 -36.0 Dark Down 22.8 84.9 Low 05:44:08 - 06:14:08 -655
Reno 05:59:09 -36.5 Dark Down 23.3 85.2 Low 05:44:09 - 06:14:09 -694
Carson City 05:59:11 -36.8 Dark Down 23.3 85.0 Low 05:44:11 - 06:14:11 -721
Gardnerville 05:59:13 -37.0 Dark Down 23.3 84.9 Low 05:44:13 - 06:14:13 -741
Yerington 05:59:12 -37.3 Dark Down 23.7 85.3 Low 05:44:12 - 06:14:12 -755
Hawthorne 05:59:13 -37.9 Dark Down 24.1 85.4 Low 05:44:13 - 06:14:13 -806
Lee Vining 05:59:17 -38.1 Dark Down 23.7 84.9 Low 05:44:17 - 06:14:17 -833
Bishop 05:59:19 -38.9 Dark Down 24.2 85.1 Low 05:44:19 - 06:14:19 -902
Beatty 05:59:19 -40.1 Dark Down 25.5 85.8 Low 05:44:19 - 06:14:19 -988
Dunrhomin 05:58:38 -41.3 Dark Down 34.4 94.9 Up 05:43:38 - 06:13:38 -1080
Nikitin 05:58:39 -41.5 Dark Down 34.4 94.8 Up 05:43:39 - 06:13:39 -1094
CU-SBO 05:58:40 -41.5 Dark Down 34.3 94.7 Up 05:43:40 - 06:13:40 -1097
Wildwood 05:59:36 -41.4 Dark Down 23.8 83.5 Low 05:44:36 - 06:14:36 -1154
Laughlin/Bullhead City 05:59:24 -42.5 Dark Down 27.1 86.2 Low 05:44:24 - 06:14:24 -1196
Patrick 05:59:22 -42.6 Dark Down 27.7 86.7 Low 05:44:22 - 06:14:22 -1198
Idyllwild 05:59:35 -42.7 Dark Down 25.3 84.4 Low 05:44:35 - 06:14:35 -1243
Lake Havasu City 05:59:28 -43.2 Dark Down 27.3 86.0 Low 05:44:28 - 06:14:28 -1259
Calipatria 05:59:36 -43.8 Dark Down 26.2 84.7 Low 05:44:36 - 06:14:36 -1333
Yuma 05:59:37 -44.6 Dark Down 26.9 84.9 Low 05:44:37 - 06:14:37 -1399
George/Scottsdale 05:59:26 -44.9 Dark Down 29.3 86.9 Low 05:44:26 - 06:14:26 -1403

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 534074, (2026/09/06 05:55UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 37.43  31
6Bet Ari       01:54:38.6 +20:48:26  2.6  2.86  65
15 Ari         02:10:37.7 +19:30:01  5.7  3.08  62
PPM 117832     01:58:21.5 +18:16:27  8.4  0.20  65
PPM 117852     01:59:29.4 +18:15:56  9.0  0.18  65
534074         01:58:57.8 +18:08:11 14.8        65
Positions are for J2000

Event circumstances last updated at 2023/10/25 01:50:27 UT

Marc W. Buie, Southwest Research Institute

RECON