RECON: TNO occultation with 534161

Event between (534161) 14RQ63 and star GA1080:01117097 with event index number of 2175280

Geocentric closest approach at 2026/02/19 02:37:19 UTC

J2000 position of star is 05:33:24.6 +18:01:27
Equinox of date position of star is 05:34:41.9 +18:02:17
Stellar brightness G=15.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 93 degrees from the moon. Moon is 3% illuminated.
TNO apparent brightness V=22.5

[RECON map]
TNO is 31.8 AU from the Sun and 31.4 AU from the Earth.
The TNO is moving 7.4 km/sec on the sky relative to the star, or, 1.2 arcsec/hr.
The 1-sigma error in the time of the event is 622 seconds.
The 1-sigma cross-track error in the shadow position is 2858 km.
The sky-plane scale is 22750.7 km/arcsec.

The TNO has an absolute magnitude Hv=7.3
Diameter=208.9 km assuming a 5% albedo -- 28.1 sec chord
Diameter=85.3 km assuming a 30% albedo -- 11.5 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 534161, (2026/02/19 02:24UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:35.2 +07:24:35  0.4 11.87  99
Alnath         05:27:56.8 +28:37:38  1.6 10.71  92
120 Tau        05:35:03.6 +18:33:24  5.4  0.52  94
PPM 121076     05:33:49.5 +17:45:37  8.2  0.39  93
PPM 121092     05:34:42.0 +17:57:50  9.7  0.10  93
534161         05:34:56.3 +18:02:26 15.4        94
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 1.4 sigma about the mid-time.
The median site spacing is 32.0 km RECON observability=0.2 and success probability=19.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 02:40:34 -21.6 Dark Down 55.9 179.9 Up 02:25:34 - 02:55:34 2032
Kamloops 02:42:30 -13.0 AT Up 55.5 156.0 Up 02:27:30 - 02:57:30 1549
Kelowna 02:42:21 -13.6 AT Up 56.5 156.9 Up 02:27:21 - 02:57:21 1493
Peachland 02:42:23 -13.4 AT Up 56.5 156.4 Up 02:27:23 - 02:57:23 1476
Summerland 02:42:22 -13.4 AT Up 56.6 156.4 Up 02:27:22 - 02:57:22 1464
Penticton 02:42:21 -13.5 AT Up 56.7 156.6 Up 02:27:21 - 02:57:21 1460
Oliver 02:42:20 -13.5 AT Up 57.1 156.4 Up 02:27:20 - 02:57:20 1427
Anarchist Mountain Observatory 02:42:18 -13.6 AT Up 57.3 156.6 Up 02:27:18 - 02:57:18 1416
Tonasket 02:42:18 -13.5 AT Up 57.5 156.2 Up 02:27:18 - 02:57:18 1384
Okanogan 02:42:18 -13.4 AT Up 57.8 155.8 Up 02:27:18 - 02:57:18 1349
Brewster 02:42:20 -13.3 AT Up 58.0 155.3 Up 02:27:20 - 02:57:20 1318
Manson/Chelan 02:42:22 -13.0 AT Up 58.1 154.5 Up 02:27:22 - 02:57:22 1290
Victoria 02:42:52 -11.0 NT Up 56.5 149.8 Up 02:27:52 - 02:57:52 1277
Wenatchee 02:42:22 -12.9 AT Up 58.4 153.9 Up 02:27:22 - 02:57:22 1240
Ellensburg 02:42:23 -12.7 AT Up 58.8 153.2 Up 02:27:23 - 02:57:23 1195
Yakima 02:42:23 -12.7 AT Up 59.1 152.9 Up 02:27:23 - 02:57:23 1155
PNWRO 02:42:06 -13.8 AT Up 60.1 155.3 Up 02:27:06 - 02:57:06 1139
Toppenish/White Swan 02:42:20 -12.8 AT Up 59.4 153.0 Up 02:27:20 - 02:57:20 1138
Goldendale 02:42:23 -12.5 AT Up 59.7 151.8 Up 02:27:23 - 02:57:23 1074
The Dalles 02:42:26 -12.2 AT Up 59.8 151.0 Up 02:27:26 - 02:57:26 1043
Maupin 02:42:24 -12.2 AT Up 60.2 150.8 Up 02:27:24 - 02:57:24 1005
Dunrhomin 02:39:29 -23.5 Dark Down 67.8 181.1 Up 02:24:29 - 02:54:29 988
Sisters 02:42:26 -11.8 NT Up 60.8 149.2 Up 02:27:26 - 02:57:26 906
Bend 02:42:23 -12.0 AT Up 61.1 149.4 Up 02:27:23 - 02:57:23 889
Oregon Observatory 02:42:24 -11.9 NT Up 61.2 149.0 Up 02:27:24 - 02:57:24 869
North Lake 02:42:17 -12.2 AT Up 61.9 149.4 Up 02:27:17 - 02:57:17 819
Lakeview 02:42:09 -12.5 AT Up 63.0 149.3 Up 02:27:09 - 02:57:09 727
Chiloquin 02:42:24 -11.5 NT Up 62.1 147.0 Up 02:27:24 - 02:57:24 727
Klamath Falls 02:42:22 -11.5 NT Up 62.4 146.7 Up 02:27:22 - 02:57:22 695
Cedarville 02:42:05 -12.6 AT Up 63.6 148.9 Up 02:27:05 - 02:57:05 666
Fall River/Burney 02:42:16 -11.7 NT Up 63.6 146.1 Up 02:27:16 - 02:57:16 586
Susanville 02:42:06 -12.2 AT Up 64.4 146.8 Up 02:27:06 - 02:57:06 541
Gimple 02:42:08 -12.0 NT Up 64.5 146.1 Up 02:27:08 - 02:57:08 508
Greenville 02:42:08 -11.9 NT Up 64.5 145.9 Up 02:27:08 - 02:57:08 506
Quincy 02:42:08 -11.9 NT Up 64.7 145.7 Up 02:27:08 - 02:57:08 485
Portola 02:42:03 -12.2 AT Up 65.0 146.4 Up 02:27:03 - 02:57:03 485
Reno 02:41:55 -12.7 AT Up 65.5 147.4 Up 02:26:55 - 02:56:55 476
Carson City 02:41:54 -12.7 AT Up 65.8 147.0 Up 02:26:54 - 02:56:54 440
Yerington 02:41:46 -13.1 AT Up 66.2 148.0 Up 02:26:46 - 02:56:46 437
Gardnerville 02:41:53 -12.7 AT Up 66.0 146.8 Up 02:26:53 - 02:56:53 417
Hawthorne 02:41:40 -13.5 AT Up 66.8 148.5 Up 02:26:40 - 02:56:40 405
Tonopah 02:41:23 -14.5 AT Up 67.7 151.0 Up 02:26:23 - 02:56:23 398
Lee Vining 02:41:43 -13.1 AT Up 67.1 146.8 Up 02:26:43 - 02:56:43 334
Beatty 02:41:14 -14.8 AT Up 68.9 150.5 Up 02:26:14 - 02:56:14 294
Bishop 02:41:33 -13.6 AT Up 67.9 147.5 Up 02:26:33 - 02:56:33 294
Indian Springs 02:41:01 -15.6 AT Up 69.6 152.7 Up 02:26:01 - 02:56:01 293
Henderson 02:40:51 -16.1 AT Up 70.3 153.7 Up 02:25:51 - 02:55:51 260
Patrick 02:40:37 -16.9 AT Up 71.2 155.7 Up 02:25:37 - 02:55:37 232
Kingman/Dolan Springs 02:40:38 -16.8 AT Up 71.4 155.0 Up 02:25:38 - 02:55:38 203
Laughlin/Bullhead City 02:40:44 -16.4 AT Up 71.2 153.6 Up 02:25:44 - 02:55:44 185
Mohave Valley 02:40:43 -16.4 AT Up 71.4 153.2 Up 02:25:43 - 02:55:43 157
George/Scottsdale 02:40:08 -18.4 Dark Up 73.4 159.3 Up 02:25:08 - 02:55:08 125
Lake Havasu City 02:40:38 -16.5 AT Up 71.9 153.3 Up 02:25:38 - 02:55:38 124
Parker 02:40:36 -16.5 AT Up 72.2 152.9 Up 02:25:36 - 02:55:36 89
Idyllwild 02:41:01 -14.6 AT Up 71.6 145.9 Up 02:26:01 - 02:56:01 -27
Wildwood 02:41:23 -13.1 AT Up 70.4 142.0 Up 02:26:23 - 02:56:23 -47
Calipatria 02:40:46 -15.5 AT Up 72.6 147.9 Up 02:25:46 - 02:55:46 -53
Yuma 02:40:34 -16.2 AT Up 73.3 149.6 Up 02:25:34 - 02:55:34 -69

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 534161, (2026/02/19 02:24UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 11.87  99
Alnath         05:26:17.6 +28:36:23  1.6 10.71  92
120 Tau        05:33:31.6 +18:32:25  5.4  0.52  94
PPM 121076     05:32:18.1 +17:44:36  8.2  0.39  93
PPM 121092     05:33:10.4 +17:56:50  9.7  0.10  93
534161         05:33:24.6 +18:01:27 15.4        94
Positions are for J2000

Event circumstances last updated at 2022/01/10 23:39:01 UT

Marc W. Buie, Southwest Research Institute

RECON