RECON: TNO occultation with 523686

Event between (523686) 14DB143 and star GA0880:12852090 with event index number of 2623223

Geocentric closest approach at 2026/07/07 11:22:23 UTC

J2000 position of star is 19:04:23.2 -00:23:10
Equinox of date position of star is 19:05:38.7 -00:20:52
Stellar brightness G=16.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 83 degrees from the moon. Moon is 54% illuminated.
Apparent brightness V=22.2

[RECON map]
Object is 20.4 AU from the Sun and 19.5 AU from the Earth.
Apparent velocity is 22.8 km/sec on the sky relative to the star, or, 5.8 arcsec/hr.
The 1-sigma error in the time of the event is 171 seconds.
The 1-sigma cross-track error in the shadow position is 1091 km.
The sky-plane scale is 14111.5 km/arcsec.

The object has an absolute magnitude Hv=9.1
Diameter=91.2 km assuming a 5% albedo -- 3.9 sec chord
Diameter=37.2 km assuming a 30% albedo -- 1.6 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 523686, (2026/07/07 11:22UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:02.3 -26:29:18  0.9 45.46 122
Tarazed        19:47:31.2 +10:40:47  2.7 15.14  71
PPM 180541     19:06:41.0 -01:28:12  6.4  1.15  83
PPM 180540     19:06:37.6 -00:53:37  6.9  0.59  83
PPM 180537     19:05:38.6 -00:15:28  9.8  0.09  83
523686         19:05:45.0 -00:20:41 16.7        83
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 0.0 km RECON observability=0.0 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 11:19:31 2.4 Sun up Up 15.7 248.1 Really Low 11:04:49 - 11:34:14 6013
Kamloops 11:19:52 -5.3 CT Up 24.3 235.8 Low 11:05:09 - 11:34:34 5959
Kelowna 11:19:48 -5.5 CT Up 24.2 236.9 Low 11:05:06 - 11:34:31 5893
Peachland 11:19:48 -5.7 CT Up 24.5 236.7 Low 11:05:06 - 11:34:31 5886
Summerland 11:19:48 -5.8 CT Up 24.5 236.8 Low 11:05:05 - 11:34:30 5874
Penticton 11:19:47 -5.8 CT Up 24.5 237.0 Low 11:05:05 - 11:34:30 5869
Oliver 11:19:46 -6.0 NT Up 24.7 237.1 Low 11:05:04 - 11:34:29 5842
Anarchist Mountain Observatory 11:19:46 -6.0 NT Up 24.7 237.3 Low 11:05:03 - 11:34:28 5828
Victoria 11:19:54 -8.2 NT Up 27.1 233.8 Low 11:05:11 - 11:34:36 5807
Okanogan 11:19:45 -6.6 NT Up 25.1 237.4 Low 11:05:02 - 11:34:27 5778
Brewster 11:19:44 -6.9 NT Up 25.4 237.3 Low 11:05:02 - 11:34:27 5757
Manson/Chelan 11:19:45 -7.2 NT Up 25.7 237.1 Low 11:05:02 - 11:34:27 5743
Wenatchee 11:19:44 -7.6 NT Up 26.1 237.1 Low 11:05:01 - 11:34:26 5706
Ellensburg 11:19:44 -8.0 NT Up 26.4 237.1 Low 11:05:01 - 11:34:26 5674
Yakima 11:19:43 -8.3 NT Up 26.7 237.2 Low 11:05:00 - 11:34:25 5641
Toppenish/White Swan 11:19:42 -8.4 NT Up 26.7 237.5 Low 11:04:59 - 11:34:24 5623
PNWRO 11:19:38 -8.0 NT Up 26.0 238.9 Low 11:04:55 - 11:34:20 5586
The Dalles 11:19:41 -9.4 NT Up 27.6 237.1 Low 11:04:59 - 11:34:24 5563
Maupin 11:19:40 -9.6 NT Up 27.7 237.3 Low 11:04:58 - 11:34:23 5528
Sisters 11:19:39 -10.5 NT Up 28.5 237.3 Low 11:04:57 - 11:34:22 5458
Bend 11:19:39 -10.5 NT Up 28.5 237.6 Low 11:04:56 - 11:34:21 5436
Oregon Observatory 11:19:38 -10.7 NT Up 28.6 237.6 Low 11:04:56 - 11:34:21 5423
Chiloquin 11:19:37 -11.9 NT Up 29.6 237.8 Low 11:04:54 - 11:34:19 5313
Klamath Falls 11:19:36 -12.1 AT Up 29.7 238.1 Low 11:04:53 - 11:34:18 5283
Cedarville 11:19:30 -11.8 NT Up 29.1 239.8 Low 11:04:48 - 11:34:13 5215
Fall River/Burney 11:19:32 -12.8 AT Up 30.1 239.0 Up 11:04:50 - 11:34:15 5178
Greenville 11:19:29 -13.2 AT Up 30.3 239.8 Up 11:04:47 - 11:34:12 5096
Gimple 11:19:29 -13.1 AT Up 30.2 239.9 Up 11:04:47 - 11:34:12 5096
Quincy 11:19:29 -13.3 AT Up 30.4 239.9 Up 11:04:46 - 11:34:11 5078
Portola 11:19:27 -13.2 AT Up 30.2 240.4 Up 11:04:45 - 11:34:10 5065
Dunrhomin 11:18:57 -3.9 CT Up 19.3 252.2 Really Low 11:04:14 - 11:33:39 5038
Reno 11:19:25 -13.0 AT Up 29.8 241.1 Low 11:04:43 - 11:34:08 5038
Nikitin 11:18:56 -4.0 CT Up 19.4 252.2 Really Low 11:04:14 - 11:33:39 5021
CU-SBO 11:18:56 -4.1 CT Up 19.5 252.2 Really Low 11:04:14 - 11:33:39 5016
Carson City 11:19:25 -13.2 AT Up 30.0 241.3 Up 11:04:42 - 11:34:07 5005
Yerington 11:19:22 -13.0 AT Up 29.7 241.9 Low 11:04:40 - 11:34:05 4985
Gardnerville 11:19:24 -13.4 AT Up 30.1 241.4 Up 11:04:41 - 11:34:06 4983
Hawthorne 11:19:21 -13.1 AT Up 29.5 242.6 Low 11:04:38 - 11:34:03 4940
Lee Vining 11:19:21 -13.7 AT Up 30.1 242.4 Up 11:04:38 - 11:34:03 4891
Bishop 11:19:18 -13.7 AT Up 29.9 243.3 Low 11:04:35 - 11:34:00 4833
Beatty 11:19:12 -13.1 AT Up 28.9 244.9 Low 11:04:30 - 11:33:55 4782
Patrick 11:19:03 -12.3 AT Up 27.4 247.8 Low 11:04:21 - 11:33:46 4629
Laughlin/Bullhead City 11:19:04 -12.9 AT Up 28.1 247.4 Low 11:04:22 - 11:33:47 4608
Lake Havasu City 11:19:02 -13.2 AT Up 28.1 247.9 Low 11:04:20 - 11:33:45 4543
Wildwood 11:19:12 -16.1 AT Up 31.5 244.9 Up 11:04:30 - 11:33:55 4527
Idyllwild 11:19:06 -15.2 AT Up 30.2 246.5 Up 11:04:24 - 11:33:49 4484
George/Scottsdale 11:18:55 -12.1 AT Up 26.5 250.0 Low 11:04:13 - 11:33:38 4458
Calipatria 11:19:03 -14.8 AT Up 29.6 247.7 Low 11:04:20 - 11:33:45 4418
Yuma 11:19:00 -14.5 AT Up 29.0 248.6 Low 11:04:17 - 11:33:42 4372

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 523686, (2026/07/07 11:22UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 45.46 122
Tarazed        19:46:15.6 +10:36:48  2.7 15.14  71
PPM 180541     19:05:18.6 -01:30:43  6.4  1.15  83
PPM 180540     19:05:15.6 -00:56:08  6.9  0.59  83
PPM 180537     19:04:16.9 -00:17:57  9.8  0.09  83
523686         19:04:23.2 -00:23:10 16.7        83
Positions are for J2000

Event circumstances last updated at 2024/06/19 21:30:13 UT

Marc W. Buie, Southwest Research Institute

RECON