RECON: TNO occultation with 450265

Event between (450265) 03WU172 and star GA1120:03024039 with event index number of 2289131

Geocentric closest approach at 2026/01/02 05:26:04 UTC

J2000 position of star is 08:24:02.9 +23:25:00
Equinox of date position of star is 08:25:21.8 +23:20:37
Stellar brightness G=15.1, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 38 degrees from the moon. Moon is 98% illuminated.
TNO apparent brightness V=21.1

[RECON map]
TNO is 29.3 AU from the Sun and 28.4 AU from the Earth.
The TNO is moving 22.1 km/sec on the sky relative to the star, or, 3.9 arcsec/hr.
The 1-sigma error in the time of the event is 140 seconds.
The 1-sigma cross-track error in the shadow position is 1677 km.
The sky-plane scale is 20577.4 km/arcsec.

The TNO has an absolute magnitude Hv=6.4
Diameter=313.3 km assuming a 5% albedo -- 14.6 sec chord
Diameter=127.9 km assuming a 30% albedo -- 6.0 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 450265, (2026/01/02 05:27UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:54.4 +27:57:41  1.1  9.86  28
19Lam Cnc      08:22:04.7 +23:56:19  5.9  1.01  37
PPM 098654     08:25:03.4 +23:26:57  8.1  0.17  37
450265         08:25:34.9 +23:19:53 15.1        38
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 29.8 km RECON observability=1.0 and success probability=23.2%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 05:29:26 -49.0 Dark Up 35.4 95.6 Up 05:17:14 - 05:41:38 -984
Sleaford 05:28:55 -55.2 Dark Up 43.8 109.6 Up 05:16:43 - 05:41:07 -1009
Kelowna 05:29:26 -49.9 Dark Up 36.0 95.8 Up 05:17:14 - 05:41:38 -1078
Peachland 05:29:27 -49.8 Dark Up 35.9 95.4 Up 05:17:15 - 05:41:39 -1084
Summerland 05:29:27 -49.9 Dark Up 35.9 95.4 Up 05:17:15 - 05:41:39 -1100
Penticton 05:29:27 -50.0 Dark Up 36.0 95.5 Up 05:17:15 - 05:41:39 -1108
Oliver 05:29:28 -50.2 Dark Up 36.1 95.2 Up 05:17:16 - 05:41:40 -1143
Victoria 05:29:36 -48.2 Dark Up 33.6 91.8 Up 05:17:24 - 05:41:48 -1145
Anarchist Mountain Observatory 05:29:28 -50.4 Dark Up 36.2 95.2 Up 05:17:16 - 05:41:40 -1163
Tonasket 05:29:29 -50.5 Dark Up 36.2 95.0 Up 05:17:17 - 05:41:41 -1193
Okanogan 05:29:30 -50.5 Dark Up 36.1 94.6 Up 05:17:18 - 05:41:42 -1224
Brewster 05:29:31 -50.5 Dark Up 36.0 94.2 Up 05:17:19 - 05:41:43 -1248
Manson/Chelan 05:29:32 -50.4 Dark Up 35.8 93.8 Up 05:17:20 - 05:41:44 -1263
Wenatchee 05:29:34 -50.5 Dark Up 35.7 93.3 Up 05:17:22 - 05:41:46 -1308
Ellensburg 05:29:35 -50.5 Dark Up 35.6 92.9 Up 05:17:23 - 05:41:47 -1346
Yakima 05:29:36 -50.7 Dark Up 35.6 92.6 Up 05:17:24 - 05:41:48 -1387
Toppenish/White Swan 05:29:35 -50.9 Dark Up 35.7 92.6 Up 05:17:23 - 05:41:47 -1411
Goldendale 05:29:38 -50.8 Dark Up 35.4 91.9 Up 05:17:26 - 05:41:50 -1460
PNWRO 05:29:34 -52.0 Dark Up 36.8 93.4 Up 05:17:22 - 05:41:46 -1473
The Dalles 05:29:39 -50.7 Dark Up 35.2 91.4 Up 05:17:27 - 05:41:51 -1476
Maupin 05:29:39 -50.9 Dark Up 35.3 91.2 Up 05:17:27 - 05:41:51 -1521
Sisters 05:29:42 -50.9 Dark Up 34.9 90.3 Up 05:17:30 - 05:41:54 -1602
Bend 05:29:42 -51.2 Dark Up 35.1 90.3 Up 05:17:30 - 05:41:54 -1630
Oregon Observatory 05:29:43 -51.1 Dark Up 35.0 90.1 Up 05:17:31 - 05:41:55 -1646
North Lake 05:29:43 -51.7 Dark Up 35.4 90.0 Up 05:17:31 - 05:41:55 -1721
Chiloquin 05:29:46 -51.3 Dark Up 34.7 88.9 Up 05:17:34 - 05:41:58 -1773
Klamath Falls 05:29:47 -51.4 Dark Up 34.8 88.7 Up 05:17:35 - 05:41:59 -1810
Lakeview 05:29:44 -52.4 Dark Up 35.8 89.6 Up 05:17:32 - 05:41:56 -1840
Cedarville 05:29:44 -52.8 Dark Up 36.0 89.2 Up 05:17:32 - 05:41:56 -1912
Fall River/Burney 05:29:48 -52.0 Dark Up 35.0 88.1 Up 05:17:36 - 05:42:00 -1940
Susanville 05:29:47 -52.7 Dark Up 35.6 88.1 Up 05:17:35 - 05:41:59 -2019
Greenville 05:29:48 -52.6 Dark Up 35.4 87.8 Up 05:17:36 - 05:42:00 -2042
Gimple 05:29:48 -52.7 Dark Up 35.4 87.8 Up 05:17:36 - 05:42:00 -2044
Quincy 05:29:49 -52.7 Dark Up 35.4 87.6 Up 05:17:37 - 05:42:01 -2064
Portola 05:29:48 -53.1 Dark Up 35.7 87.8 Up 05:17:36 - 05:42:00 -2086
Reno 05:29:47 -53.6 Dark Up 36.2 88.0 Up 05:17:35 - 05:41:59 -2126
Carson City 05:29:47 -53.7 Dark Up 36.2 87.8 Up 05:17:35 - 05:41:59 -2164
Gardnerville 05:29:48 -53.8 Dark Up 36.2 87.6 Up 05:17:36 - 05:42:00 -2190
Yerington 05:29:47 -54.2 Dark Up 36.7 88.0 Up 05:17:35 - 05:41:59 -2196
Dunrhomin 05:29:10 -63.4 Dark Up 47.3 98.6 Up 05:16:58 - 05:41:22 -2248
Hawthorne 05:29:46 -54.8 Dark Up 37.1 88.0 Up 05:17:34 - 05:41:58 -2254
CU-SBO 05:29:11 -63.5 Dark Up 47.2 98.2 Up 05:16:59 - 05:41:23 -2274
Lee Vining 05:29:48 -54.5 Dark Up 36.7 87.3 Up 05:17:36 - 05:42:00 -2305
Tonopah 05:29:44 -56.0 Dark Up 38.2 88.5 Up 05:17:32 - 05:41:56 -2328
Bishop 05:29:47 -55.2 Dark Up 37.2 87.3 Up 05:17:35 - 05:41:59 -2382
Beatty 05:29:44 -56.6 Dark Up 38.5 87.8 Up 05:17:32 - 05:41:56 -2460
Indian Springs 05:29:42 -57.5 Dark Up 39.3 88.2 Up 05:17:30 - 05:41:54 -2513
Henderson 05:29:41 -58.2 Dark Up 39.9 88.1 Up 05:17:29 - 05:41:53 -2581
Patrick 05:29:39 -59.2 Dark Up 40.8 88.2 Up 05:17:27 - 05:41:51 -2666
Laughlin/Bullhead City 05:29:41 -58.7 Dark Up 40.2 87.6 Up 05:17:29 - 05:41:53 -2682
Kingman/Dolan Springs 05:29:39 -59.1 Dark Up 40.6 87.9 Up 05:17:27 - 05:41:51 -2687
Mohave Valley 05:29:41 -58.8 Dark Up 40.2 87.4 Up 05:17:29 - 05:41:53 -2711
Wildwood 05:29:52 -55.7 Dark Up 36.8 84.7 Up 05:17:40 - 05:42:04 -2728
Lake Havasu City 05:29:41 -59.1 Dark Up 40.4 87.2 Up 05:17:29 - 05:41:53 -2758
Parker 05:29:41 -59.2 Dark Up 40.4 86.9 Up 05:17:29 - 05:41:53 -2797
Idyllwild 05:29:48 -57.3 Dark Up 38.4 85.4 Up 05:17:36 - 05:42:00 -2801
George/Scottsdale 05:29:36 -61.3 Dark Up 42.3 87.8 Up 05:17:24 - 05:41:48 -2880
Calipatria 05:29:46 -58.4 Dark Up 39.3 85.5 Up 05:17:34 - 05:41:58 -2887
Yuma 05:29:43 -59.2 Dark Up 40.0 85.5 Up 05:17:31 - 05:41:55 -2949

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 450265, (2026/01/02 05:27UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1  9.86  28
19Lam Cnc      08:20:32.1 +24:01:20  5.9  1.01  37
PPM 098654     08:23:31.3 +23:32:04  8.1  0.17  37
450265         08:24:02.9 +23:25:00 15.1        37
Positions are for J2000

Event circumstances last updated at 2022/04/12 23:07:34 UT

Marc W. Buie, Southwest Research Institute

RECON