RECON: TNO occultation with 533561

Event between (533561) 14JN80 and star GA0800:07610283 with event index number of 2586463

Geocentric closest approach at 2026/05/31 07:38:00 UTC

J2000 position of star is 17:58:18.2 -09:23:00
Equinox of date position of star is 17:59:38.8 -09:23:02
Stellar brightness G=16.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 28 degrees from the moon. Moon is 100% illuminated.
Apparent brightness V=22.4

[RECON map]
Object is 37.4 AU from the Sun and 36.5 AU from the Earth.
Apparent velocity is 22.6 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 523 seconds.
The 1-sigma cross-track error in the shadow position is 2982 km.
The sky-plane scale is 26465.0 km/arcsec.

The object has an absolute magnitude Hv=6.6
Diameter=288.4 km assuming a 5% albedo -- 12.7 sec chord
Diameter=117.7 km assuming a 30% albedo -- 5.2 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 533561, (2026/05/31 07:38UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:01.9 -26:29:18  0.9 27.07   1
35Eta Oph      17:11:53.7 -15:45:21  2.6 13.30  15
64Nu Oph       18:00:28.9 -09:46:28  3.3  0.43  28
PPM 201234     17:58:36.3 -08:04:13  8.2  1.34  28
PPM 201248     17:59:50.0 -09:25:45  9.5  0.05  28
533561         17:59:45.2 -09:23:02 16.8        28
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 1.7 sigma about the mid-time.
The median site spacing is 21.6 km RECON observability=1.0 and success probability=0.2%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 07:38:54 -15.5 AT Up 27.7 166.7 Low 07:23:54 - 07:53:54 12072
Kamloops 07:39:35 -17.3 AT Up 25.8 151.0 Low 07:24:35 - 07:54:35 11876
Kelowna 07:39:35 -18.1 Dark Up 26.8 151.8 Low 07:24:35 - 07:54:35 11835
Peachland 07:39:35 -18.2 Dark Up 26.8 151.5 Low 07:24:35 - 07:54:35 11826
Summerland 07:39:36 -18.4 Dark Up 26.9 151.5 Low 07:24:36 - 07:54:36 11818
Penticton 07:39:36 -18.4 Dark Up 27.0 151.6 Low 07:24:36 - 07:54:36 11815
Oliver 07:39:35 -18.8 Dark Up 27.3 151.5 Low 07:24:35 - 07:54:35 11793
Anarchist Mountain Observatory 07:39:35 -19.0 Dark Up 27.5 151.7 Low 07:24:35 - 07:54:35 11785
Okanogan 07:39:37 -19.6 Dark Up 28.0 151.3 Low 07:24:37 - 07:54:37 11742
Brewster 07:39:38 -19.9 Dark Up 28.2 151.0 Low 07:24:38 - 07:54:38 11723
Victoria 07:39:48 -19.2 Dark Up 26.6 147.4 Low 07:24:48 - 07:54:48 11714
Manson/Chelan 07:39:39 -20.1 Dark Up 28.3 150.6 Low 07:24:39 - 07:54:39 11706
Wenatchee 07:39:40 -20.5 Dark Up 28.6 150.3 Low 07:24:40 - 07:54:40 11674
Ellensburg 07:39:42 -20.9 Dark Up 28.9 149.9 Low 07:24:42 - 07:54:42 11645
Yakima 07:39:42 -21.3 Dark Up 29.3 149.8 Low 07:24:42 - 07:54:42 11618
Toppenish/White Swan 07:39:43 -21.6 Dark Up 29.5 149.9 Low 07:24:43 - 07:54:43 11605
PNWRO 07:39:38 -22.0 Dark Up 30.3 151.4 Up 07:24:38 - 07:54:38 11596
The Dalles 07:39:46 -22.3 Dark Up 29.9 148.9 Low 07:24:46 - 07:54:46 11545
Maupin 07:39:46 -22.7 Dark Up 30.3 148.9 Up 07:24:46 - 07:54:46 11518
Sisters 07:39:49 -23.5 Dark Up 30.9 148.1 Up 07:24:49 - 07:54:49 11453
Bend 07:39:48 -23.8 Dark Up 31.2 148.3 Up 07:24:48 - 07:54:48 11439
Oregon Observatory 07:39:48 -24.0 Dark Up 31.3 148.1 Up 07:24:48 - 07:54:48 11426
Chiloquin 07:39:51 -25.2 Dark Up 32.2 147.2 Up 07:24:51 - 07:54:51 11328
Dunrhomin 07:38:57 -27.1 Dark Up 39.3 165.7 Up 07:23:57 - 07:53:57 11321
Nikitin 07:38:57 -27.3 Dark Up 39.5 165.6 Up 07:23:57 - 07:53:57 11308
Klamath Falls 07:39:52 -25.6 Dark Up 32.6 147.2 Up 07:24:52 - 07:54:52 11304
CU-SBO 07:38:58 -27.4 Dark Up 39.5 165.5 Up 07:23:58 - 07:53:58 11303
Cedarville 07:39:47 -26.4 Dark Up 33.8 148.7 Up 07:24:47 - 07:54:47 11271
Fall River/Burney 07:39:52 -26.8 Dark Up 33.7 147.2 Up 07:24:52 - 07:54:52 11221
Gimple 07:39:51 -27.7 Dark Up 34.7 147.4 Up 07:24:51 - 07:54:51 11160
Greenville 07:39:52 -27.7 Dark Up 34.6 147.3 Up 07:24:52 - 07:54:52 11159
Quincy 07:39:52 -27.9 Dark Up 34.8 147.3 Up 07:24:52 - 07:54:52 11144
Portola 07:39:51 -28.1 Dark Up 35.1 147.7 Up 07:24:51 - 07:54:51 11140
Reno 07:39:49 -28.4 Dark Up 35.6 148.4 Up 07:24:49 - 07:54:49 11127
Carson City 07:39:49 -28.8 Dark Up 35.9 148.2 Up 07:24:49 - 07:54:49 11100
Yerington 07:39:47 -29.0 Dark Up 36.3 148.9 Up 07:24:47 - 07:54:47 11092
Gardnerville 07:39:49 -29.0 Dark Up 36.1 148.2 Up 07:24:49 - 07:54:49 11081
Hawthorne 07:39:45 -29.5 Dark Up 36.9 149.3 Up 07:24:45 - 07:54:45 11062
Lee Vining 07:39:49 -30.0 Dark Up 37.2 148.5 Up 07:24:49 - 07:54:49 11013
Bishop 07:39:46 -30.6 Dark Up 38.0 149.1 Up 07:24:46 - 07:54:46 10974
Beatty 07:39:41 -31.2 Dark Up 39.1 150.8 Up 07:24:41 - 07:54:41 10955
Patrick 07:39:32 -32.6 Dark Up 41.5 153.6 Up 07:24:32 - 07:54:32 10867
Laughlin/Bullhead City 07:39:35 -32.9 Dark Up 41.4 152.6 Up 07:24:35 - 07:54:35 10840
Lake Havasu City 07:39:34 -33.6 Dark Up 42.1 152.7 Up 07:24:34 - 07:54:34 10788
George/Scottsdale 07:39:24 -34.2 Dark Up 43.7 155.4 Up 07:24:24 - 07:54:24 10750
Wildwood 07:39:50 -33.9 Dark Up 40.7 147.5 Up 07:24:50 - 07:54:50 10707
Idyllwild 07:39:43 -34.3 Dark Up 41.9 149.5 Up 07:24:43 - 07:54:43 10699
Calipatria 07:39:39 -34.9 Dark Up 42.9 150.6 Up 07:24:39 - 07:54:39 10661
Yuma 07:39:37 -35.4 Dark Up 43.6 151.5 Up 07:24:37 - 07:54:37 10634

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 533561, (2026/05/31 07:38UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 27.07   1
35Eta Oph      17:10:22.7 -15:43:29  2.6 13.30  15
64Nu Oph       17:59:01.6 -09:46:28  3.3  0.43  28
PPM 201234     17:57:10.1 -08:04:08  8.2  1.34  28
PPM 201248     17:58:22.9 -09:25:43  9.5  0.05  28
533561         17:58:18.2 -09:23:00 16.8        28
Positions are for J2000

Event circumstances last updated at 2024/06/19 21:25:22 UT

Marc W. Buie, Southwest Research Institute

RECON