RECON: TNO occultation with 523761

Event between (523761) 14WU509 and star GA0920:01299038 with event index number of 2614244

Geocentric closest approach at 2026/01/28 07:34:48 UTC

J2000 position of star is 06:19:58.6 +03:29:12
Equinox of date position of star is 06:21:15.8 +03:28:28
Stellar brightness G=16.3, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 38 degrees from the moon. Moon is 73% illuminated.
Apparent brightness V=22.1

[RECON map]
Object is 40.3 AU from the Sun and 39.5 AU from the Earth.
Apparent velocity is 21.4 km/sec on the sky relative to the star, or, 2.7 arcsec/hr.
The 1-sigma error in the time of the event is 271 seconds.
The 1-sigma cross-track error in the shadow position is 1552 km.
The sky-plane scale is 28658.6 km/arcsec.

The object has an absolute magnitude Hv=6.0
Diameter=398.1 km assuming a 5% albedo -- 17.6 sec chord
Diameter=162.5 km assuming a 30% albedo -- 7.2 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 523761, (2026/01/28 07:35UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:35.1 +07:24:35  0.4  7.31  31
34Del Ori      05:33:20.4 -00:16:55  2.2 12.57  33
PPM 150401     06:24:40.9 +03:44:57  6.0  0.88  38
PPM 150256     06:19:39.4 +03:58:21  8.4  0.65  37
PPM 150336     06:22:30.5 +03:35:00  9.9  0.31  38
PPM 150300     06:21:27.8 +03:20:34 10.3  0.13  38
523761         06:21:20.9 +03:28:25 16.3        38
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 3.3 sigma about the mid-time.
The median site spacing is 0.0 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)
Sleaford 07:33:56 -55.9 Dark Up 31.1 228.7 Up 07:18:56 - 07:48:56 13894
Kamloops 07:34:29 -56.5 Dark Up 38.0 213.5 Up 07:19:29 - 07:49:29 13544
Kelowna 07:34:24 -57.5 Dark Up 38.4 214.9 Up 07:19:24 - 07:49:24 13512
Peachland 07:34:25 -57.5 Dark Up 38.6 214.6 Up 07:19:25 - 07:49:25 13499
Summerland 07:34:24 -57.7 Dark Up 38.7 214.8 Up 07:19:24 - 07:49:24 13491
Penticton 07:34:24 -57.8 Dark Up 38.7 215.0 Up 07:19:24 - 07:49:24 13489
Oliver 07:34:22 -58.1 Dark Up 39.0 215.1 Up 07:19:22 - 07:49:22 13467
Anarchist Mountain Observatory 07:34:21 -58.3 Dark Up 39.1 215.4 Up 07:19:21 - 07:49:21 13460
Okanogan 07:34:21 -58.9 Dark Up 39.7 215.5 Up 07:19:21 - 07:49:21 13414
Brewster 07:34:21 -59.1 Dark Up 40.0 215.4 Up 07:19:21 - 07:49:21 13392
Manson/Chelan 07:34:21 -59.2 Dark Up 40.3 215.0 Up 07:19:21 - 07:49:21 13371
Victoria 07:34:32 -57.9 Dark Up 40.9 210.8 Up 07:19:32 - 07:49:32 13345
Wenatchee 07:34:20 -59.6 Dark Up 40.7 215.1 Up 07:19:20 - 07:49:20 13336
Ellensburg 07:34:20 -60.0 Dark Up 41.2 215.0 Up 07:19:20 - 07:49:20 13304
Yakima 07:34:19 -60.4 Dark Up 41.5 215.2 Up 07:19:19 - 07:49:19 13276
PNWRO 07:34:12 -61.3 Dark Up 41.3 217.5 Up 07:19:12 - 07:49:12 13272
Toppenish/White Swan 07:34:18 -60.6 Dark Up 41.6 215.5 Up 07:19:18 - 07:49:18 13265
The Dalles 07:34:18 -61.1 Dark Up 42.6 214.9 Up 07:19:18 - 07:49:18 13194
Dunrhomin 07:33:15 -67.5 Dark Up 38.1 235.8 Up 07:18:15 - 07:48:15 13167
Maupin 07:34:17 -61.5 Dark Up 42.9 215.3 Up 07:19:17 - 07:49:17 13167
Nikitin 07:33:14 -67.7 Dark Up 38.2 235.9 Up 07:18:14 - 07:48:14 13154
CU-SBO 07:33:13 -67.8 Dark Up 38.3 235.9 Up 07:18:13 - 07:48:13 13148
Sisters 07:34:16 -62.2 Dark Up 43.8 215.1 Up 07:19:16 - 07:49:16 13094
Bend 07:34:14 -62.5 Dark Up 43.9 215.6 Up 07:19:14 - 07:49:14 13083
Oregon Observatory 07:34:15 -62.6 Dark Up 44.1 215.5 Up 07:19:15 - 07:49:15 13068
Chiloquin 07:34:12 -63.7 Dark Up 45.3 215.7 Up 07:19:12 - 07:49:12 12963
Klamath Falls 07:34:12 -64.0 Dark Up 45.6 216.0 Up 07:19:12 - 07:49:12 12939
Cedarville 07:34:04 -65.2 Dark Up 45.4 218.5 Up 07:19:04 - 07:49:04 12924
Fall River/Burney 07:34:08 -65.2 Dark Up 46.4 217.2 Up 07:19:08 - 07:49:08 12859
Gimple 07:34:03 -66.2 Dark Up 46.8 218.5 Up 07:19:03 - 07:49:03 12803
Greenville 07:34:03 -66.2 Dark Up 46.9 218.4 Up 07:19:03 - 07:49:03 12801
Portola 07:34:01 -66.6 Dark Up 46.9 219.2 Up 07:19:01 - 07:49:01 12787
Quincy 07:34:03 -66.4 Dark Up 47.0 218.5 Up 07:19:03 - 07:49:03 12785
Reno 07:33:58 -67.1 Dark Up 46.8 220.2 Up 07:18:58 - 07:48:58 12782
Yerington 07:33:55 -67.8 Dark Up 46.9 221.4 Up 07:18:55 - 07:48:55 12755
Carson City 07:33:57 -67.4 Dark Up 47.1 220.5 Up 07:18:57 - 07:48:57 12755
Gardnerville 07:33:57 -67.7 Dark Up 47.2 220.7 Up 07:18:57 - 07:48:57 12737
Hawthorne 07:33:51 -68.4 Dark Up 47.0 222.4 Up 07:18:51 - 07:48:51 12732
Lee Vining 07:33:52 -68.7 Dark Up 47.6 222.2 Up 07:18:52 - 07:48:52 12676
Beatty 07:33:41 -70.4 Dark Up 47.1 225.8 Up 07:18:41 - 07:48:41 12649
Bishop 07:33:48 -69.5 Dark Up 47.7 223.5 Up 07:18:48 - 07:48:48 12646
Patrick 07:33:27 -72.4 Dark Up 46.4 230.3 Up 07:18:27 - 07:48:27 12600
Laughlin/Bullhead City 07:33:29 -72.6 Dark Up 47.0 229.7 Up 07:18:29 - 07:48:29 12563
Lake Havasu City 07:33:27 -73.3 Dark Up 47.3 230.5 Up 07:18:27 - 07:48:27 12514
George/Scottsdale 07:33:16 -74.4 Dark Up 46.2 233.8 Up 07:18:16 - 07:48:16 12511
Idyllwild 07:33:32 -73.4 Dark Up 49.3 228.4 Up 07:18:32 - 07:48:32 12392
Wildwood 07:33:40 -72.4 Dark Up 50.2 225.8 Up 07:18:40 - 07:48:40 12374
Calipatria 07:33:27 -74.3 Dark Up 48.9 230.3 Up 07:18:27 - 07:48:27 12371
Yuma 07:33:23 -74.9 Dark Up 48.6 231.7 Up 07:18:23 - 07:48:23 12357

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 523761, (2026/01/28 07:35UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  7.31  31
34Del Ori      05:32:00.4 -00:17:57  2.2 12.57  33
PPM 150401     06:23:18.5 +03:45:52  6.0  0.88  38
PPM 150256     06:18:16.8 +03:59:04  8.4  0.65  37
PPM 150336     06:21:08.1 +03:35:49  9.9  0.31  38
PPM 150300     06:20:05.6 +03:21:22 10.3  0.13  38
523761         06:19:58.6 +03:29:12 16.3        38
Positions are for J2000

Event circumstances last updated at 2024/06/18 21:24:01 UT

Marc W. Buie, Southwest Research Institute

RECON