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 08:16:07 UTC

J2000 position of star is 08:24:31.6 +19:14:45
Equinox of date position of star is 08:25:51.5 +19:10:10
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.
Apparent brightness V=22.7

[RECON map]
Object is 35.7 AU from the Sun and 34.7 AU from the Earth.
Apparent velocity is 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 171 seconds.
The 1-sigma cross-track error in the shadow position is 3005 km.
The sky-plane scale is 25188.6 km/arcsec.

The object 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 5.0 sigma about the mid-time.
The median site spacing is 32.9 km RECON observability=1.0 and success probability=16.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 08:15:40 -54.1 Dark Up 53.8 212.2 Up 08:00:54 - 08:30:25 3057
Kamloops 08:16:15 -57.5 Dark Up 58.3 189.3 Up 08:01:30 - 08:31:01 2698
Kelowna 08:16:12 -58.3 Dark Up 59.0 191.2 Up 08:01:26 - 08:30:57 2635
Peachland 08:16:12 -58.4 Dark Up 59.1 190.7 Up 08:01:27 - 08:30:58 2621
Summerland 08:16:12 -58.5 Dark Up 59.3 190.9 Up 08:01:27 - 08:30:58 2608
Penticton 08:16:12 -58.6 Dark Up 59.3 191.1 Up 08:01:26 - 08:30:57 2604
Oliver 08:16:11 -59.0 Dark Up 59.7 191.2 Up 08:01:26 - 08:30:57 2571
Anarchist Mountain Observatory 08:16:11 -59.1 Dark Up 59.8 191.6 Up 08:01:26 - 08:30:57 2558
Okanogan 08:16:11 -59.8 Dark Up 60.5 191.4 Up 08:01:25 - 08:30:56 2494
Brewster 08:16:11 -60.1 Dark Up 60.8 191.2 Up 08:01:26 - 08:30:57 2465
Victoria 08:16:22 -59.6 Dark Up 60.7 184.2 Up 08:01:37 - 08:31:08 2455
Manson/Chelan 08:16:12 -60.3 Dark Up 61.0 190.5 Up 08:01:26 - 08:30:57 2440
Wenatchee 08:16:12 -60.7 Dark Up 61.5 190.3 Up 08:01:27 - 08:30:58 2392
Ellensburg 08:16:12 -61.2 Dark Up 62.0 190.0 Up 08:01:27 - 08:30:58 2350
Yakima 08:16:12 -61.6 Dark Up 62.4 190.1 Up 08:01:26 - 08:30:57 2310
Toppenish/White Swan 08:16:12 -61.8 Dark Up 62.5 190.6 Up 08:01:26 - 08:30:57 2292
PNWRO 08:16:07 -62.1 Dark Up 62.7 193.7 Up 08:01:21 - 08:30:52 2280
The Dalles 08:16:13 -62.6 Dark Up 63.4 189.2 Up 08:01:27 - 08:30:58 2205
Maupin 08:16:13 -63.0 Dark Up 63.8 189.6 Up 08:01:27 - 08:30:58 2166
Sisters 08:16:13 -63.9 Dark Up 64.7 188.8 Up 08:01:28 - 08:30:59 2073
Bend 08:16:12 -64.1 Dark Up 64.9 189.4 Up 08:01:26 - 08:30:57 2053
Oregon Observatory 08:16:12 -64.3 Dark Up 65.1 189.2 Up 08:01:27 - 08:30:58 2034
Dunrhomin 08:15:18 -64.2 Dark Up 62.8 225.3 Up 08:00:32 - 08:30:03 1990
Nikitin 08:15:18 -64.4 Dark Up 62.9 225.6 Up 08:00:32 - 08:30:03 1972
CU-SBO 08:15:18 -64.5 Dark Up 63.0 225.5 Up 08:00:32 - 08:30:03 1964
Chiloquin 08:16:12 -65.6 Dark Up 66.5 188.7 Up 08:01:27 - 08:30:58 1897
Klamath Falls 08:16:12 -65.9 Dark Up 66.8 189.0 Up 08:01:26 - 08:30:57 1864
Cedarville 08:16:06 -66.6 Dark Up 67.3 193.1 Up 08:01:20 - 08:30:51 1820
Fall River/Burney 08:16:10 -67.1 Dark Up 67.9 190.4 Up 08:01:25 - 08:30:56 1752
Gimple 08:16:07 -68.0 Dark Up 68.7 192.2 Up 08:01:22 - 08:30:53 1669
Greenville 08:16:07 -68.0 Dark Up 68.7 191.9 Up 08:01:22 - 08:30:53 1668
Quincy 08:16:07 -68.2 Dark Up 68.9 192.1 Up 08:01:22 - 08:30:53 1647
Portola 08:16:06 -68.3 Dark Up 69.0 193.4 Up 08:01:20 - 08:30:51 1642
Reno 08:16:03 -68.6 Dark Up 69.1 195.2 Up 08:01:18 - 08:30:49 1626
Carson City 08:16:03 -69.0 Dark Up 69.5 195.5 Up 08:01:17 - 08:30:48 1590
Yerington 08:16:01 -69.1 Dark Up 69.5 197.3 Up 08:01:15 - 08:30:46 1581
Gardnerville 08:16:02 -69.2 Dark Up 69.7 195.8 Up 08:01:17 - 08:30:48 1566
Hawthorne 08:15:59 -69.5 Dark Up 69.8 199.0 Up 08:01:13 - 08:30:44 1544
Lee Vining 08:16:00 -70.1 Dark Up 70.5 198.2 Up 08:01:14 - 08:30:45 1477
Bishop 08:15:56 -70.7 Dark Up 70.9 200.8 Up 08:01:11 - 08:30:42 1429
Beatty 08:15:50 -70.9 Dark Up 70.8 205.7 Up 08:01:05 - 08:30:36 1412
Patrick 08:15:39 -71.7 Dark Up 70.9 215.2 Up 08:00:54 - 08:30:25 1317
Laughlin/Bullhead City 08:15:41 -72.1 Dark Up 71.4 213.8 Up 08:00:56 - 08:30:27 1277
Lake Havasu City 08:15:40 -72.7 Dark Up 71.9 215.6 Up 08:00:54 - 08:30:25 1213
George/Scottsdale 08:15:30 -72.6 Dark Up 71.2 223.1 Up 08:00:45 - 08:30:16 1186
Wildwood 08:15:54 -74.0 Dark Up 74.0 204.0 Up 08:01:08 - 08:30:39 1087
Idyllwild 08:15:47 -74.0 Dark Up 73.6 210.4 Up 08:01:01 - 08:30:32 1086
Calipatria 08:15:42 -74.3 Dark Up 73.6 214.9 Up 08:00:57 - 08:30:28 1046
Yuma 08:15:39 -74.5 Dark Up 73.5 218.3 Up 08:00:53 - 08:30:24 1020

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 2023/03/04 04:11:21 UT

Marc W. Buie, Southwest Research Institute

RECON