RECON: TNO occultation with 523718

Event between (523718) 14KZ101 and star GA0840:08478546 with event index number of 2330209

Geocentric closest approach at 2026/07/11 05:06:48 UTC

J2000 position of star is 18:24:33.8 -05:54:05
Equinox of date position of star is 18:25:52.4 -05:53:12
Stellar brightness G=16.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 141 degrees from the moon. Moon is 15% illuminated.
Apparent brightness V=22.1

[RECON map]
Object is 36.0 AU from the Sun and 35.1 AU from the Earth.
Apparent velocity is 22.6 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 377 seconds.
The 1-sigma cross-track error in the shadow position is 2543 km.
The sky-plane scale is 25431.5 km/arcsec.

The object has an absolute magnitude Hv=6.5
Diameter=316.2 km assuming a 5% albedo -- 13.4 sec chord
Diameter=129.1 km assuming a 30% albedo -- 5.5 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 523718, (2026/07/11 05:07UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:02.3 -26:29:19  0.9 34.27 174
60Bet Oph      17:44:47.0 +04:33:29  2.8 14.66 141
PPM 201730     18:26:08.3 -07:03:35  6.5  1.18 141
PPM 201709     18:25:00.3 -06:14:07  8.4  0.43 141
PPM 201724     18:25:54.4 -05:56:09  9.2  0.05 141
523718         18:25:59.0 -05:53:07 16.4       141
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 2.4 sigma about the mid-time.
The median site spacing is 25.0 km RECON observability=0.4 and success probability=0.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 05:07:39 -7.2 NT Down 27.6 145.3 Low 04:52:39 - 05:22:39 8403
Sleaford 05:06:57 -11.2 NT Down 30.4 161.2 Up 04:51:57 - 05:21:57 8367
Kelowna 05:07:39 -8.2 NT Down 28.6 146.0 Low 04:52:39 - 05:22:39 8352
Peachland 05:07:40 -8.2 NT Down 28.6 145.7 Low 04:52:40 - 05:22:40 8348
Summerland 05:07:41 -8.3 NT Down 28.8 145.7 Low 04:52:41 - 05:22:41 8339
Penticton 05:07:40 -8.4 NT Down 28.9 145.8 Low 04:52:40 - 05:22:40 8334
Oliver 05:07:41 -8.7 NT Down 29.2 145.7 Low 04:52:41 - 05:22:41 8314
Anarchist Mountain Observatory 05:07:41 -8.9 NT Down 29.4 145.9 Low 04:52:41 - 05:22:41 8304
Victoria 05:07:52 -7.5 NT Down 28.2 141.5 Low 04:52:52 - 05:22:52 8301
Okanogan 05:07:43 -9.3 NT Down 29.8 145.4 Low 04:52:43 - 05:22:43 8267
Brewster 05:07:44 -9.4 NT Down 30.0 145.1 Low 04:52:44 - 05:22:44 8253
Manson/Chelan 05:07:45 -9.4 NT Down 30.0 144.7 Up 04:52:45 - 05:22:45 8243
Wenatchee 05:07:48 -9.7 NT Down 30.3 144.3 Up 04:52:48 - 05:22:48 8216
Ellensburg 05:07:49 -9.9 NT Down 30.6 144.0 Up 04:52:49 - 05:22:49 8193
Yakima 05:07:50 -10.2 NT Down 30.9 143.8 Up 04:52:50 - 05:22:50 8168
Toppenish/White Swan 05:07:50 -10.4 NT Down 31.1 143.9 Up 04:52:50 - 05:22:50 8154
PNWRO 05:07:46 -11.4 NT Down 32.0 145.4 Up 04:52:46 - 05:22:46 8120
The Dalles 05:07:55 -10.7 NT Down 31.4 142.8 Up 04:52:55 - 05:22:55 8111
Maupin 05:07:55 -11.0 NT Down 31.8 142.8 Up 04:52:55 - 05:22:55 8084
Sisters 05:07:56 -11.4 NT Down 32.3 141.9 Up 04:52:56 - 05:22:56 8032
Bend 05:07:57 -11.7 NT Down 32.6 142.1 Up 04:52:57 - 05:22:57 8015
Oregon Observatory 05:07:57 -11.8 NT Down 32.7 141.9 Up 04:52:57 - 05:22:57 8005
Chiloquin 05:07:57 -12.6 AT Down 33.5 140.9 Up 04:52:57 - 05:22:57 7922
Klamath Falls 05:07:57 -12.8 AT Down 33.8 140.9 Up 04:52:57 - 05:22:57 7898
Cedarville 05:07:57 -14.2 AT Down 35.1 142.3 Up 04:52:57 - 05:22:57 7838
Fall River/Burney 05:07:57 -13.9 AT Down 34.9 140.8 Up 04:52:57 - 05:22:57 7815
Greenville 05:07:57 -14.8 AT Down 35.9 140.8 Up 04:52:57 - 05:22:57 7748
Gimple 05:07:57 -14.8 AT Down 35.9 140.9 Up 04:52:57 - 05:22:57 7748
Quincy 05:07:57 -14.9 AT Down 36.0 140.7 Up 04:52:57 - 05:22:57 7734
Portola 05:07:57 -15.3 AT Down 36.3 141.2 Up 04:52:57 - 05:22:57 7721
Reno 05:07:57 -15.8 AT Down 36.9 141.8 Up 04:52:57 - 05:22:57 7696
Carson City 05:07:57 -16.1 AT Down 37.2 141.6 Up 04:52:57 - 05:22:57 7670
Gardnerville 05:07:57 -16.3 AT Down 37.4 141.6 Up 04:52:57 - 05:22:57 7653
Yerington 05:07:57 -16.6 AT Down 37.6 142.2 Up 04:52:57 - 05:22:57 7650
Hawthorne 05:07:57 -17.2 AT Down 38.2 142.6 Up 04:52:57 - 05:22:57 7612
Dunrhomin 05:07:12 -21.8 Dark Down 41.7 159.3 Up 04:52:12 - 05:22:12 7604
Nikitin 05:07:13 -21.9 Dark Down 41.9 159.2 Up 04:52:13 - 05:22:13 7591
CU-SBO 05:07:13 -22.0 Dark Down 41.9 159.1 Up 04:52:13 - 05:22:13 7587
Lee Vining 05:07:57 -17.4 AT Down 38.4 141.8 Up 04:52:57 - 05:22:57 7576
Bishop 05:07:57 -18.2 Dark Down 39.3 142.3 Up 04:52:57 - 05:22:57 7524
Beatty 05:07:57 -19.4 Dark Down 40.4 143.9 Up 04:52:57 - 05:22:57 7473
Patrick 05:07:50 -22.0 Dark Down 43.0 146.6 Up 04:52:50 - 05:22:50 7330
Laughlin/Bullhead City 05:07:53 -21.8 Dark Down 42.8 145.6 Up 04:52:53 - 05:22:53 7318
Wildwood 05:08:11 -20.5 Dark Down 41.7 140.4 Up 04:53:11 - 05:23:11 7271
Lake Havasu City 05:07:54 -22.5 Dark Down 43.5 145.6 Up 04:52:54 - 05:22:54 7262
Idyllwild 05:07:57 -21.8 Dark Down 43.0 142.3 Up 04:52:57 - 05:22:57 7227
George/Scottsdale 05:07:47 -24.4 Dark Down 45.3 148.2 Up 04:52:47 - 05:22:47 7174
Calipatria 05:07:57 -22.9 Dark Down 44.1 143.3 Up 04:52:57 - 05:22:57 7164
Yuma 05:07:57 -23.7 Dark Down 44.9 144.2 Up 04:52:57 - 05:22:57 7119

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 523718, (2026/07/11 05:07UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 34.27 174
60Bet Oph      17:43:28.3 +04:34:06  2.8 14.66 141
PPM 201730     18:24:42.3 -07:04:34  6.5  1.18 141
PPM 201709     18:23:34.9 -06:15:04  8.4  0.43 141
PPM 201724     18:24:29.2 -05:57:08  9.2  0.05 141
523718         18:24:33.8 -05:54:05 16.4       141
Positions are for J2000

Event circumstances last updated at 2024/06/19 21:31:48 UT

Marc W. Buie, Southwest Research Institute

RECON