RECON: TNO occultation with 535231

Event between (535231) 14YJ50 and star GA1080:03249115 with event index number of 1618671

Geocentric closest approach at 2026/01/26 09:46:13 UTC

J2000 position of star is 09:46:45.0 +19:30:58
Equinox of date position of star is 09:47:50.1 +19:25:31
Stellar brightness G=15.6, use SENSEUP=128
Star is 103 degrees from the moon. Moon is 52% illuminated.
TNO apparent brightness V=22.5

[RECON map]
TNO is 36.8 AU from the Sun and 35.9 AU from the Earth.
The TNO is moving 24.0 km/sec on the sky relative to the star, or, 3.3 arcsec/hr.
The 1-sigma error in the time of the event is 386 seconds.
The 1-sigma cross-track error in the shadow position is 5454 km.
The sky-plane scale is 26031.5 km/arcsec.

The TNO has an absolute magnitude Hv=6.8
Diameter=263.0 km assuming a 5% albedo -- 11.0 sec chord
Diameter=107.4 km assuming a 30% albedo -- 4.5 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 535231, (2026/01/26 09:46UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:45.6 +11:50:20  1.3  9.16 111
20 Leo         09:51:17.4 +21:03:24  6.1  1.81 103
PPM 126811     09:49:53.5 +18:41:03  8.4  0.82 103
PPM 126777     09:48:00.4 +19:35:21 10.0  0.20 103
PPM 126788     09:48:47.5 +19:17:12 11.1  0.18 103
535231         09:48:11.9 +19:23:40 15.6       103
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 2.3 sigma about the mid-time.
The median site spacing is 17.1 km RECON observability=1.0 and success probability=7.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 09:46:43 -53.3 Dark Down 59.2 191.7 Up 09:31:43 - 10:01:43 3023
Summerland 09:46:44 -53.6 Dark Down 59.5 191.3 Up 09:31:44 - 10:01:44 2990
Penticton 09:46:43 -53.6 Dark Down 59.6 191.5 Up 09:31:43 - 10:01:43 2987
Okanagan Falls 09:46:42 -53.8 Dark Down 59.8 191.5 Up 09:31:42 - 10:01:42 2970
Oliver 09:46:43 -53.9 Dark Down 59.9 191.6 Up 09:31:43 - 10:01:43 2956
Anarchist Mountain Observatory 09:46:42 -53.9 Dark Down 60.1 192.0 Up 09:31:42 - 10:01:42 2947
Oroville 09:46:41 -54.0 Dark Down 60.2 191.9 Up 09:31:41 - 10:01:41 2938
Tonasket 09:46:42 -54.2 Dark Down 60.4 192.0 Up 09:31:42 - 10:01:42 2918
Okanogan 09:46:42 -54.5 Dark Down 60.7 191.8 Up 09:31:42 - 10:01:42 2884
Brewster 09:46:41 -54.8 Dark Down 61.0 191.5 Up 09:31:41 - 10:01:41 2854
Manson/Chelan 09:46:42 -55.1 Dark Down 61.3 190.9 Up 09:31:42 - 10:01:42 2825
Wenatchee 09:46:41 -55.6 Dark Down 61.8 190.7 Up 09:31:41 - 10:01:41 2778
Ellensburg 09:46:41 -56.0 Dark Down 62.2 190.4 Up 09:31:41 - 10:01:41 2735
Pasco 09:46:36 -55.9 Dark Down 62.7 193.6 Up 09:31:36 - 10:01:36 2709
Yakima 09:46:41 -56.3 Dark Down 62.6 190.5 Up 09:31:41 - 10:01:41 2698
PNWRO 09:46:35 -55.9 Dark Down 62.9 194.1 Up 09:31:35 - 10:01:35 2694
Toppenish/White Swan 09:46:40 -56.4 Dark Down 62.8 191.0 Up 09:31:40 - 10:01:40 2683
George/Umatilla 09:46:36 -56.2 Dark Down 63.1 193.3 Up 09:31:36 - 10:01:36 2673
Goldendale 09:46:41 -57.0 Dark Down 63.4 190.3 Up 09:31:41 - 10:01:41 2621
SwRI 09:45:42 -51.0 Dark Down 63.2 226.1 Up 09:30:42 - 10:00:42 2615
The Dalles 09:46:42 -57.3 Dark Down 63.7 189.6 Up 09:31:42 - 10:01:42 2590
Maupin 09:46:40 -57.6 Dark Down 64.1 190.0 Up 09:31:40 - 10:01:40 2554
Madras/Culver 09:46:39 -58.0 Dark Down 64.6 190.1 Up 09:31:39 - 10:01:39 2503
Redmond 09:46:39 -58.3 Dark Down 65.0 190.1 Up 09:31:39 - 10:01:39 2468
Sisters 09:46:40 -58.5 Dark Down 65.0 189.2 Up 09:31:40 - 10:01:40 2459
Bend 09:46:39 -58.5 Dark Down 65.2 189.8 Up 09:31:39 - 10:01:39 2444
Oregon Observatory 09:46:39 -58.7 Dark Down 65.4 189.6 Up 09:31:39 - 10:01:39 2424
La Pine/Gilchrist 09:46:39 -58.9 Dark Down 65.6 189.5 Up 09:31:39 - 10:01:39 2404
North Lake 09:46:36 -58.9 Dark Down 65.9 191.1 Up 09:31:36 - 10:01:36 2381
Paisley 09:46:35 -59.1 Dark Down 66.4 192.1 Up 09:31:35 - 10:01:35 2341
Lakeview 09:46:33 -59.4 Dark Down 66.9 192.8 Up 09:31:33 - 10:01:33 2299
Chiloquin 09:46:38 -59.9 Dark Down 66.7 189.1 Up 09:31:38 - 10:01:38 2289
Klamath Falls 09:46:38 -60.1 Dark Down 67.1 189.4 Up 09:31:38 - 10:01:38 2259
Cedarville 09:46:31 -59.7 Dark Down 67.5 193.6 Up 09:31:31 - 10:01:31 2243
Tulelake 09:46:36 -60.1 Dark Down 67.3 190.3 Up 09:31:36 - 10:01:36 2243
Fall River/Burney 09:46:34 -60.7 Dark Down 68.2 190.9 Up 09:31:34 - 10:01:34 2159
Susanville 09:46:31 -60.7 Dark Down 68.7 193.0 Up 09:31:31 - 10:01:31 2122
Gimple 09:46:31 -61.0 Dark Down 69.0 192.6 Up 09:31:31 - 10:01:31 2089
Greenville 09:46:31 -61.1 Dark Down 69.0 192.4 Up 09:31:31 - 10:01:31 2087
Portola 09:46:29 -61.0 Dark Down 69.2 193.8 Up 09:31:29 - 10:01:29 2071
Quincy 09:46:31 -61.2 Dark Down 69.2 192.6 Up 09:31:31 - 10:01:31 2068
Reno 09:46:27 -60.8 Dark Down 69.4 195.7 Up 09:31:27 - 10:01:27 2066
Yerington 09:46:24 -60.7 Dark Down 69.7 197.8 Up 09:31:24 - 10:01:24 2035
Carson City 09:46:26 -61.0 Dark Down 69.7 196.0 Up 09:31:26 - 10:01:26 2033
Tonopah 09:46:15 -60.0 Dark Down 70.1 203.7 Up 09:31:15 - 10:01:15 2011
Gardnerville 09:46:25 -61.1 Dark Down 69.9 196.3 Up 09:31:25 - 10:01:25 2011
Hawthorne 09:46:21 -60.7 Dark Down 70.1 199.6 Up 09:31:21 - 10:01:21 2008
Lee Vining 09:46:21 -61.3 Dark Down 70.7 198.8 Up 09:31:21 - 10:01:21 1938
Indian Springs 09:46:08 -59.8 Dark Down 70.9 209.5 Up 09:31:08 - 10:01:08 1923
Beatty 09:46:12 -60.4 Dark Down 71.0 206.3 Up 09:31:12 - 10:01:12 1917
Bishop 09:46:18 -61.2 Dark Down 71.1 201.4 Up 09:31:18 - 10:01:18 1905
Henderson 09:46:04 -59.6 Dark Down 71.1 212.1 Up 09:31:04 - 10:01:04 1897
Patrick 09:46:00 -59.0 Dark Down 71.1 215.9 Up 09:31:00 - 10:01:00 1878
Kingman/Dolan Springs 09:46:00 -59.3 Dark Down 71.3 215.8 Up 09:31:00 - 10:01:00 1850
Searchlight/Boulder City 09:46:02 -59.8 Dark Down 71.5 213.2 Up 09:31:02 - 10:01:02 1845
Lone Pine 09:46:15 -61.4 Dark Down 71.7 203.1 Up 09:31:15 - 10:01:15 1843
Laughlin/Bullhead City 09:46:01 -59.6 Dark Down 71.6 214.6 Up 09:31:01 - 10:01:01 1829
Mohave Valley 09:46:00 -59.8 Dark Down 71.8 215.0 Up 09:31:00 - 10:01:00 1803
Lake Havasu City 09:45:59 -59.7 Dark Down 72.0 216.4 Up 09:30:59 - 10:00:59 1773
Parker 09:45:58 -59.9 Dark Down 72.3 217.1 Up 09:30:58 - 10:00:58 1741
Blythe 09:45:58 -60.3 Dark Down 72.9 217.3 Up 09:30:58 - 10:00:58 1679
CPSLO 09:46:22 -63.9 Dark Down 73.6 196.7 Up 09:31:22 - 10:01:22 1628
Idyllwild 09:46:05 -61.8 Dark Down 73.8 211.1 Up 09:31:05 - 10:01:05 1613
Calipatria 09:46:00 -61.2 Dark Down 73.7 215.7 Up 09:31:00 - 10:01:00 1597
Yuma 09:45:56 -60.7 Dark Down 73.6 219.1 Up 09:30:56 - 10:00:56 1588
Wildwood 09:46:13 -63.1 Dark Down 74.2 204.8 Up 09:31:13 - 10:01:13 1580

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 535231, (2026/01/26 09:46UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3  9.16 111
20 Leo         09:49:50.0 +21:10:46  6.1  1.81 103
PPM 126811     09:48:26.9 +18:48:23  8.4  0.82 103
PPM 126777     09:46:33.4 +19:42:39 10.0  0.20 103
PPM 126788     09:47:20.7 +19:24:30 11.1  0.18 103
535231         09:46:45.0 +19:30:58 15.6       103
Positions are for J2000

Event circumstances last updated at 2019/07/09 23:16:35 UT

Marc W. Buie, Southwest Research Institute

RECON