RECON: TNO occultation with 535229

Event between (535229) 14YG50 and star GA1080:03078586 with event index number of 2244834

Geocentric closest approach at 2026/01/28 08:17:19 UTC

J2000 position of star is 08:24:31.6 +19:14:45
Equinox of date position of star is 08:25:48.4 +19:10:20
Stellar brightness G=15.3, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 57 degrees from the moon. Moon is 74% illuminated.
TNO apparent brightness V=22.7

[RECON map]
TNO is 35.7 AU from the Sun and 34.7 AU from the Earth.
The TNO is moving 25.4 km/sec on the sky relative to the star, or, 3.6 arcsec/hr.
The 1-sigma error in the time of the event is 295 seconds.
The 1-sigma cross-track error in the shadow position is 4953 km.
The sky-plane scale is 25188.6 km/arcsec.

The TNO has an absolute magnitude Hv=7.2
Diameter=215.8 km assuming a 5% albedo -- 8.5 sec chord
Diameter=88.1 km assuming a 30% albedo -- 3.5 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 535229, (2026/01/28 08:17UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:54.7 +27:57:40  1.1 12.55  46
20 Cnc         08:24:51.2 +18:14:48  5.9  0.95  57
PPM 125249     08:27:20.2 +19:31:06  8.5  0.47  57
PPM 125237     08:26:19.6 +19:05:03  9.7  0.10  57
535229         08:26:01.5 +19:09:35 15.3        58
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 3.0 sigma about the mid-time.
The median site spacing is 27.0 km RECON observability=1.0 and success probability=9.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 08:16:52 -54.1 Dark Up 53.7 212.7 Up 08:01:52 - 08:31:52 4906
Kamloops 08:17:27 -57.5 Dark Up 58.3 189.9 Up 08:02:27 - 08:32:27 4546
Kelowna 08:17:24 -58.3 Dark Up 59.0 191.7 Up 08:02:24 - 08:32:24 4484
Peachland 08:17:25 -58.4 Dark Up 59.1 191.2 Up 08:02:25 - 08:32:25 4469
Summerland 08:17:24 -58.5 Dark Up 59.2 191.4 Up 08:02:24 - 08:32:24 4457
Penticton 08:17:24 -58.6 Dark Up 59.3 191.7 Up 08:02:24 - 08:32:24 4452
Oliver 08:17:24 -59.0 Dark Up 59.6 191.8 Up 08:02:24 - 08:32:24 4419
Anarchist Mountain Observatory 08:17:23 -59.1 Dark Up 59.8 192.2 Up 08:02:23 - 08:32:23 4406
Tonasket 08:17:23 -59.4 Dark Up 60.1 192.2 Up 08:02:23 - 08:32:23 4376
Okanogan 08:17:23 -59.8 Dark Up 60.4 192.0 Up 08:02:23 - 08:32:23 4342
Brewster 08:17:24 -60.0 Dark Up 60.7 191.7 Up 08:02:24 - 08:32:24 4314
Victoria 08:17:35 -59.6 Dark Up 60.7 184.7 Up 08:02:35 - 08:32:35 4303
Manson/Chelan 08:17:25 -60.3 Dark Up 61.0 191.1 Up 08:02:25 - 08:32:25 4288
Wenatchee 08:17:24 -60.7 Dark Up 61.5 190.9 Up 08:02:24 - 08:32:24 4241
Ellensburg 08:17:24 -61.2 Dark Up 61.9 190.6 Up 08:02:24 - 08:32:24 4198
Yakima 08:17:24 -61.6 Dark Up 62.3 190.8 Up 08:02:24 - 08:32:24 4159
Toppenish/White Swan 08:17:23 -61.8 Dark Up 62.5 191.2 Up 08:02:23 - 08:32:23 4141
PNWRO 08:17:18 -62.1 Dark Up 62.6 194.3 Up 08:02:18 - 08:32:18 4129
Goldendale 08:17:25 -62.3 Dark Up 63.1 190.5 Up 08:02:25 - 08:32:25 4081
The Dalles 08:17:25 -62.6 Dark Up 63.4 189.8 Up 08:02:25 - 08:32:25 4053
Maupin 08:17:24 -63.0 Dark Up 63.8 190.2 Up 08:02:24 - 08:32:24 4015
Sisters 08:17:25 -63.9 Dark Up 64.7 189.4 Up 08:02:25 - 08:32:25 3921
Bend 08:17:24 -64.1 Dark Up 64.9 190.1 Up 08:02:24 - 08:32:24 3902
Oregon Observatory 08:17:25 -64.3 Dark Up 65.1 189.9 Up 08:02:25 - 08:32:25 3883
Dunrhomin 08:16:30 -64.1 Dark Up 62.6 225.9 Up 08:01:30 - 08:31:30 3841
North Lake 08:17:22 -64.9 Dark Up 65.6 191.3 Up 08:02:22 - 08:32:22 3828
CU-SBO 08:16:30 -64.3 Dark Up 62.9 226.0 Up 08:01:30 - 08:31:30 3815
Chiloquin 08:17:24 -65.6 Dark Up 66.4 189.4 Up 08:02:24 - 08:32:24 3746
Lakeview 08:17:20 -66.0 Dark Up 66.6 193.1 Up 08:02:20 - 08:32:20 3732
Klamath Falls 08:17:24 -65.9 Dark Up 66.8 189.7 Up 08:02:24 - 08:32:24 3713
Cedarville 08:17:18 -66.6 Dark Up 67.2 193.8 Up 08:02:18 - 08:32:18 3669
Fall River/Burney 08:17:21 -67.1 Dark Up 67.9 191.1 Up 08:02:21 - 08:32:21 3601
Susanville 08:17:19 -67.7 Dark Up 68.4 193.3 Up 08:02:19 - 08:32:19 3549
Gimple 08:17:19 -68.0 Dark Up 68.7 192.9 Up 08:02:19 - 08:32:19 3518
Greenville 08:17:19 -68.0 Dark Up 68.7 192.7 Up 08:02:19 - 08:32:19 3517
Quincy 08:17:20 -68.2 Dark Up 68.9 192.8 Up 08:02:20 - 08:32:20 3496
Portola 08:17:18 -68.3 Dark Up 68.9 194.1 Up 08:02:18 - 08:32:18 3491
Reno 08:17:15 -68.6 Dark Up 69.1 196.0 Up 08:02:15 - 08:32:15 3476
Carson City 08:17:15 -68.9 Dark Up 69.4 196.3 Up 08:02:15 - 08:32:15 3439
Yerington 08:17:13 -69.1 Dark Up 69.4 198.1 Up 08:02:13 - 08:32:13 3431
Gardnerville 08:17:15 -69.2 Dark Up 69.6 196.6 Up 08:02:15 - 08:32:15 3416
Hawthorne 08:17:11 -69.5 Dark Up 69.7 199.8 Up 08:02:11 - 08:32:11 3393
Tonopah 08:17:06 -69.8 Dark Up 69.8 203.9 Up 08:02:06 - 08:32:06 3372
Lee Vining 08:17:11 -70.1 Dark Up 70.4 199.1 Up 08:02:11 - 08:32:11 3327
Bishop 08:17:09 -70.7 Dark Up 70.8 201.6 Up 08:02:09 - 08:32:09 3279
Beatty 08:17:03 -70.9 Dark Up 70.7 206.5 Up 08:02:03 - 08:32:03 3262
Indian Springs 08:16:59 -71.0 Dark Up 70.6 209.7 Up 08:01:59 - 08:31:59 3249
Henderson 08:16:56 -71.3 Dark Up 70.7 212.2 Up 08:01:56 - 08:31:56 3209
Patrick 08:16:51 -71.6 Dark Up 70.8 216.0 Up 08:01:51 - 08:31:51 3167
Kingman/Dolan Springs 08:16:51 -71.9 Dark Up 71.0 215.9 Up 08:01:51 - 08:31:51 3141
Laughlin/Bullhead City 08:16:53 -72.1 Dark Up 71.3 214.6 Up 08:01:53 - 08:31:53 3127
Mohave Valley 08:16:53 -72.3 Dark Up 71.5 215.1 Up 08:01:53 - 08:31:53 3099
Lake Havasu City 08:16:51 -72.6 Dark Up 71.7 216.4 Up 08:01:51 - 08:31:51 3063
George/Scottsdale 08:16:42 -72.4 Dark Up 71.0 223.8 Up 08:01:42 - 08:31:42 3036
Parker 08:16:51 -72.9 Dark Up 72.0 217.1 Up 08:01:51 - 08:31:51 3028
Wildwood 08:17:06 -73.9 Dark Up 73.8 205.0 Up 08:02:06 - 08:32:06 2937
Idyllwild 08:16:59 -74.0 Dark Up 73.4 211.3 Up 08:01:59 - 08:31:59 2936
Calipatria 08:16:54 -74.2 Dark Up 73.4 215.8 Up 08:01:54 - 08:31:54 2896
Yuma 08:16:51 -74.4 Dark Up 73.3 219.1 Up 08:01:51 - 08:31:51 2870

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 535229, (2026/01/28 08:17UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 12.55  46
20 Cnc         08:23:21.7 +18:19:55  5.9  0.95  57
PPM 125249     08:25:50.1 +19:36:18  8.5  0.47  57
PPM 125237     08:24:49.7 +19:10:13  9.7  0.10  57
535229         08:24:31.6 +19:14:45 15.3        57
Positions are for J2000

Event circumstances last updated at 2022/04/13 23:09:08 UT

Marc W. Buie, Southwest Research Institute

RECON