RECON: TNO occultation with 523712

Event between (523712) 14JS80 and star GA0700:34410071 with event index number of 2331650

Geocentric closest approach at 2026/08/06 04:44:22 UTC

J2000 position of star is 20:57:48.7 -18:49:40
Equinox of date position of star is 20:59:11.8 -18:43:55
Stellar brightness G=16.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 94 degrees from the moon. Moon is 49% illuminated.
Apparent brightness V=21.7

[RECON map]
Object is 40.1 AU from the Sun and 39.1 AU from the Earth.
Apparent velocity is 24.5 km/sec on the sky relative to the star, or, 3.1 arcsec/hr.
The 1-sigma error in the time of the event is 106 seconds.
The 1-sigma cross-track error in the shadow position is 1668 km.
The sky-plane scale is 28345.8 km/arcsec.

The object has an absolute magnitude Hv=5.7
Diameter=430.5 km assuming a 5% albedo -- 18.2 sec chord
Diameter=175.8 km assuming a 30% albedo -- 7.5 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 523712, (2026/08/06 04:49UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:59:06.7 -29:28:50  1.2 29.27  75
38Zet Sgr      19:04:18.1 -29:50:23  2.7 28.36 122
19 Cap         20:56:17.8 -17:49:13  5.4  1.15  94
PPM 238177     21:00:32.6 -18:48:44  8.2  0.30  93
PPM 238143     20:58:59.3 -18:48:56  9.4  0.12  94
523712         20:59:19.0 -18:43:25 16.8        93
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 19.9 km RECON observability=0.2 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 04:45:07 -9.4 NT Down 8.4 134.0 Really Low 04:35:47 - 04:54:26 8417
Sleaford 04:44:32 -14.4 AT Down 13.0 146.6 Really Low 04:35:12 - 04:53:51 8408
Kelowna 04:45:07 -10.4 NT Down 9.3 134.6 Really Low 04:35:47 - 04:54:26 8397
Peachland 04:45:08 -10.3 NT Down 9.3 134.4 Really Low 04:35:48 - 04:54:27 8394
Summerland 04:45:08 -10.4 NT Down 9.4 134.4 Really Low 04:35:48 - 04:54:27 8390
Penticton 04:45:08 -10.5 NT Down 9.5 134.5 Really Low 04:35:48 - 04:54:27 8388
Oliver 04:45:09 -10.8 NT Down 9.8 134.5 Really Low 04:35:49 - 04:54:28 8379
Anarchist Mountain Observatory 04:45:10 -11.0 NT Down 10.0 134.6 Really Low 04:35:50 - 04:54:29 8375
Okanogan 04:45:12 -11.3 NT Down 10.3 134.4 Really Low 04:35:52 - 04:54:31 8356
Victoria 04:45:19 -9.3 NT Down 8.4 131.3 Really Low 04:36:00 - 04:54:39 8354
Brewster 04:45:13 -11.4 NT Down 10.4 134.2 Really Low 04:35:54 - 04:54:33 8348
Manson/Chelan 04:45:14 -11.4 NT Down 10.4 133.8 Really Low 04:35:55 - 04:54:34 8342
Wenatchee 04:45:16 -11.6 NT Down 10.7 133.6 Really Low 04:35:56 - 04:54:35 8327
Ellensburg 04:45:18 -11.7 NT Down 10.8 133.4 Really Low 04:35:58 - 04:54:37 8314
Yakima 04:45:19 -12.0 AT Down 11.1 133.3 Really Low 04:35:59 - 04:54:38 8301
Toppenish/White Swan 04:45:19 -12.2 AT Down 11.3 133.4 Really Low 04:36:00 - 04:54:39 8294
PNWRO 04:45:18 -13.3 AT Down 12.3 134.6 Really Low 04:35:58 - 04:54:37 8283
The Dalles 04:45:24 -12.3 AT Down 11.5 132.7 Really Low 04:36:04 - 04:54:43 8267
Maupin 04:45:25 -12.7 AT Down 11.8 132.7 Really Low 04:36:05 - 04:54:44 8253
Sisters 04:45:28 -13.0 AT Down 12.2 132.2 Really Low 04:36:09 - 04:54:48 8222
Bend 04:45:29 -13.3 AT Down 12.5 132.4 Really Low 04:36:09 - 04:54:48 8214
Oregon Observatory 04:45:29 -13.3 AT Down 12.5 132.2 Really Low 04:36:10 - 04:54:49 8207
Chiloquin 04:45:34 -13.9 AT Down 13.2 131.7 Really Low 04:36:15 - 04:54:54 8156
Klamath Falls 04:45:35 -14.2 AT Down 13.5 131.7 Really Low 04:36:16 - 04:54:55 8143
Cedarville 04:45:34 -15.5 AT Down 14.8 132.8 Really Low 04:36:14 - 04:54:53 8117
Fall River/Burney 04:45:38 -15.1 AT Down 14.5 131.8 Really Low 04:36:18 - 04:54:57 8095
Greenville 04:45:39 -16.0 AT Down 15.3 132.0 Really Low 04:36:20 - 04:54:59 8056
Gimple 04:45:40 -16.0 AT Down 15.4 132.0 Really Low 04:36:20 - 04:54:59 8056
Quincy 04:45:40 -16.1 AT Down 15.5 131.9 Really Low 04:36:21 - 04:55:00 8047
Portola 04:45:39 -16.5 AT Down 15.8 132.3 Really Low 04:36:20 - 04:54:59 8043
Reno 04:45:38 -17.0 AT Down 16.4 132.7 Really Low 04:36:19 - 04:54:58 8032
Carson City 04:45:40 -17.3 AT Down 16.6 132.7 Really Low 04:36:20 - 04:54:59 8015
Yerington 04:45:39 -17.8 AT Down 17.1 133.1 Really Low 04:36:19 - 04:54:58 8007
Gardnerville 04:45:40 -17.5 AT Down 16.8 132.7 Really Low 04:36:21 - 04:55:00 8004
Dunrhomin 04:44:58 -24.2 Dark Down 23.1 145.2 Low 04:35:39 - 04:54:18 8003
Nikitin 04:44:59 -24.4 Dark Down 23.3 145.2 Low 04:35:40 - 04:54:19 7995
CU-SBO 04:44:58 -24.4 Dark Down 23.3 145.1 Low 04:35:39 - 04:54:18 7993
Hawthorne 04:45:38 -18.4 Dark Down 17.7 133.5 Really Low 04:36:19 - 04:54:58 7985
Lee Vining 04:45:41 -18.5 Dark Down 17.8 132.9 Really Low 04:36:21 - 04:55:00 7959
Bishop 04:45:41 -19.3 Dark Down 18.7 133.4 Really Low 04:36:22 - 04:55:01 7930
Beatty 04:45:39 -20.6 Dark Down 19.9 134.6 Really Low 04:36:19 - 04:54:58 7905
Patrick 04:45:35 -23.3 Dark Down 22.6 136.5 Low 04:36:15 - 04:54:54 7823
Laughlin/Bullhead City 04:45:38 -23.1 Dark Down 22.4 135.8 Low 04:36:18 - 04:54:57 7811
Lake Havasu City 04:45:39 -23.7 Dark Down 23.0 135.9 Low 04:36:19 - 04:54:58 7775
Wildwood 04:45:51 -21.3 Dark Down 20.8 132.4 Low 04:36:31 - 04:55:10 7761
Idyllwild 04:45:47 -22.7 Dark Down 22.2 133.7 Low 04:36:27 - 04:55:06 7741
George/Scottsdale 04:45:33 -25.7 Dark Down 25.0 137.7 Low 04:36:14 - 04:54:53 7723
Calipatria 04:45:45 -23.9 Dark Down 23.3 134.5 Low 04:36:26 - 04:55:05 7703
Yuma 04:45:44 -24.7 Dark Down 24.2 135.1 Low 04:36:24 - 04:55:03 7676

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 523712, (2026/08/06 04:49UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.6 -29:37:24  1.2 29.27  75
38Zet Sgr      19:02:36.7 -29:52:49  2.7 28.36 122
19 Cap         20:54:47.8 -17:55:23  5.4  1.15  94
PPM 238177     20:59:02.3 -18:55:01  8.2  0.30  93
PPM 238143     20:57:28.8 -18:55:10  9.4  0.12  94
523712         20:57:48.7 -18:49:40 16.8        94
Positions are for J2000

Event circumstances last updated at 2024/06/19 21:32:26 UT

Marc W. Buie, Southwest Research Institute

RECON