RECON: TNO occultation with 535026

Event between (535026) 14WV509 and star GA0920:00520282 with event index number of 2337914

Geocentric closest approach at 2025/12/11 05:03:38 UTC

J2000 position of star is 04:55:19.1 +02:45:58
Equinox of date position of star is 04:56:31.5 +02:48:06
Stellar brightness G=15.3, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 89 degrees from the moon. Moon is 57% illuminated.
Apparent brightness V=22.7

[RECON map]
Object is 39.4 AU from the Sun and 38.5 AU from the Earth.
Apparent velocity is 25.2 km/sec on the sky relative to the star, or, 3.2 arcsec/hr.
The 1-sigma error in the time of the event is 253 seconds.
The 1-sigma cross-track error in the shadow position is 1783 km.
The sky-plane scale is 27913.9 km/arcsec.

The object has an absolute magnitude Hv=6.7
Diameter=275.4 km assuming a 5% albedo -- 10.7 sec chord
Diameter=112.4 km assuming a 30% albedo -- 4.4 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 535026, (2025/12/11 05:04UT)
Object            RA         Dec     mag  sep  mel
Rigel          05:15:47.2 -08:10:25  0.1 11.97  86
Bellatrix      05:26:31.4 +06:22:16  1.6  8.25  81
8Pi 5Ori       04:55:36.3 +02:28:52  3.7  0.42  89
PPM 148170     04:56:40.0 +03:00:09  8.1  0.20  89
PPM 148175     04:57:02.5 +02:51:09  9.3  0.10  89
535026         04:56:40.5 +02:48:21 15.3        89
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 3.6 sigma about the mid-time.
The median site spacing is 24.2 km RECON observability=1.0 and success probability=22.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 05:04:53 -47.1 Dark Down 32.5 133.4 Up 04:49:53 - 05:19:53 290
Sleaford 05:04:17 -53.8 Dark Down 36.9 150.1 Up 04:49:17 - 05:19:17 251
Kelowna 05:04:53 -48.0 Dark Down 33.5 134.0 Up 04:49:53 - 05:19:53 227
Peachland 05:04:54 -47.9 Dark Down 33.4 133.6 Up 04:49:54 - 05:19:54 223
Summerland 05:04:54 -48.0 Dark Down 33.6 133.7 Up 04:49:54 - 05:19:54 211
Penticton 05:04:54 -48.1 Dark Down 33.7 133.8 Up 04:49:54 - 05:19:54 206
Oliver 05:04:55 -48.2 Dark Down 33.9 133.6 Up 04:49:55 - 05:19:55 182
Victoria 05:05:05 -46.1 Dark Down 32.5 129.3 Up 04:50:05 - 05:20:05 172
Anarchist Mountain Observatory 05:04:55 -48.4 Dark Down 34.1 133.7 Up 04:49:55 - 05:19:55 168
Okanogan 05:04:57 -48.5 Dark Down 34.5 133.2 Up 04:49:57 - 05:19:57 125
Brewster 05:04:58 -48.5 Dark Down 34.6 132.8 Up 04:49:58 - 05:19:58 108
Manson/Chelan 05:04:59 -48.3 Dark Down 34.5 132.3 Up 04:49:59 - 05:19:59 97
Wenatchee 05:05:01 -48.4 Dark Down 34.8 131.9 Up 04:50:01 - 05:20:01 65
Ellensburg 05:05:02 -48.4 Dark Down 34.9 131.5 Up 04:50:02 - 05:20:02 37
Yakima 05:05:03 -48.6 Dark Down 35.2 131.3 Up 04:50:03 - 05:20:03 8
Toppenish/White Swan 05:05:03 -48.7 Dark Down 35.4 131.3 Up 04:50:03 - 05:20:03 -9
PNWRO 05:05:01 -49.8 Dark Down 36.4 132.7 Up 04:50:01 - 05:20:01 -51
The Dalles 05:05:07 -48.5 Dark Down 35.5 130.1 Up 04:50:07 - 05:20:07 -58
Maupin 05:05:08 -48.7 Dark Down 35.8 130.0 Up 04:50:08 - 05:20:08 -90
Sisters 05:05:11 -48.6 Dark Down 36.1 129.0 Up 04:50:11 - 05:20:11 -151
Bend 05:05:11 -48.9 Dark Down 36.4 129.1 Up 04:50:11 - 05:20:11 -172
Oregon Observatory 05:05:12 -48.8 Dark Down 36.5 128.9 Up 04:50:12 - 05:20:12 -183
Chiloquin 05:05:16 -48.9 Dark Down 37.1 127.7 Up 04:50:16 - 05:20:16 -280
Klamath Falls 05:05:16 -49.0 Dark Down 37.3 127.6 Up 04:50:16 - 05:20:16 -308
Cedarville 05:05:14 -50.3 Dark Down 38.7 128.8 Up 04:50:14 - 05:20:14 -380
Fall River/Burney 05:05:18 -49.6 Dark Down 38.3 127.3 Up 04:50:18 - 05:20:18 -406
Greenville 05:05:19 -50.1 Dark Down 39.1 127.1 Up 04:50:19 - 05:20:19 -483
Gimple 05:05:18 -50.2 Dark Down 39.1 127.2 Up 04:50:18 - 05:20:18 -485
Quincy 05:05:19 -50.2 Dark Down 39.2 127.0 Up 04:50:19 - 05:20:19 -500
Portola 05:05:18 -50.5 Dark Down 39.6 127.4 Up 04:50:18 - 05:20:18 -515
Reno 05:05:17 -51.1 Dark Down 40.1 127.9 Up 04:50:17 - 05:20:17 -544
Carson City 05:05:18 -51.2 Dark Down 40.4 127.7 Up 04:50:18 - 05:20:18 -574
Gardnerville 05:05:18 -51.3 Dark Down 40.5 127.6 Up 04:50:18 - 05:20:18 -595
Yerington 05:05:16 -51.7 Dark Down 40.9 128.2 Up 04:50:16 - 05:20:16 -597
Hawthorne 05:05:16 -52.2 Dark Down 41.5 128.4 Up 04:50:16 - 05:20:16 -642
Dunrhomin 05:04:34 -61.2 Dark Down 47.3 145.4 Up 04:49:34 - 05:19:34 -652
Nikitin 05:04:34 -61.3 Dark Down 47.4 145.3 Up 04:49:34 - 05:19:34 -667
CU-SBO 05:04:35 -61.3 Dark Down 47.4 145.1 Up 04:49:35 - 05:19:35 -671
Lee Vining 05:05:18 -51.9 Dark Down 41.5 127.5 Up 04:50:18 - 05:20:18 -684
Bishop 05:05:18 -52.6 Dark Down 42.4 127.9 Up 04:50:18 - 05:20:18 -743
Beatty 05:05:14 -54.0 Dark Down 43.7 129.3 Up 04:50:14 - 05:20:14 -802
Patrick 05:05:08 -56.5 Dark Down 46.4 131.3 Up 04:50:08 - 05:20:08 -966
Laughlin/Bullhead City 05:05:11 -56.0 Dark Down 46.1 130.3 Up 04:50:11 - 05:20:11 -979
Wildwood 05:05:25 -53.0 Dark Down 44.2 125.2 Up 04:50:25 - 05:20:25 -1025
Lake Havasu City 05:05:11 -56.4 Dark Down 46.7 130.1 Up 04:50:11 - 05:20:11 -1042
Idyllwild 05:05:20 -54.6 Dark Down 45.7 126.9 Up 04:50:20 - 05:20:20 -1080
George/Scottsdale 05:05:05 -58.5 Dark Down 48.7 132.3 Up 04:50:05 - 05:20:05 -1142
Calipatria 05:05:17 -55.6 Dark Down 46.8 127.6 Up 04:50:17 - 05:20:17 -1150
Yuma 05:05:15 -56.4 Dark Down 47.7 128.3 Up 04:50:15 - 05:20:15 -1200

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 535026, (2025/12/11 05:04UT)
Object            RA         Dec     mag  sep  mel
Rigel          05:14:32.3 -08:12:06  0.1 11.97  86
Bellatrix      05:25:07.8 +06:20:58  1.6  8.25  81
8Pi 5Ori       04:54:15.1 +02:26:26  3.7  0.42  89
PPM 148170     04:55:18.5 +02:57:46  8.1  0.20  89
PPM 148175     04:55:41.1 +02:48:46  9.3  0.10  89
535026         04:55:19.1 +02:45:58 15.3        89
Positions are for J2000

Event circumstances last updated at 2023/01/24 02:38:59 UT

Marc W. Buie, Southwest Research Institute

RECON