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 05:26:48 UTC

J2000 position of star is 08:24:02.9 +23:25:00
Equinox of date position of star is 08:25:28.5 +23:20:14
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.
Apparent brightness V=21.0

[RECON map]
Object is 29.3 AU from the Sun and 28.4 AU from the Earth.
Apparent velocity is 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 72 seconds.
The 1-sigma cross-track error in the shadow position is 1161 km.
The sky-plane scale is 20577.3 km/arcsec.

The object has an absolute magnitude Hv=6.3
Diameter=322.1 km assuming a 5% albedo -- 14.9 sec chord
Diameter=131.5 km assuming a 30% albedo -- 6.1 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 33.0 km RECON observability=1.0 and success probability=17.8%

Site Site mid-time
(UT) Sun alt
(deg) Sky Moon Star alt
(deg) Star az
(deg) Target Observing Time
(UT) X-track
(km)

Kamloops 05:30:09 -49.1 Dark Up 35.5 95.8 Up 05:23:41 - 05:36:38 -701

Sleaford 05:29:37 -55.3 Dark Up 43.9 109.7 Up 05:23:09 - 05:36:06 -724

Kelowna 05:30:09 -50.0 Dark Up 36.2 95.9 Up 05:23:41 - 05:36:38 -795

Peachland 05:30:10 -49.9 Dark Up 36.0 95.6 Up 05:23:42 - 05:36:39 -801

Summerland 05:30:10 -50.0 Dark Up 36.1 95.6 Up 05:23:42 - 05:36:39 -817

Penticton 05:30:11 -50.1 Dark Up 36.1 95.6 Up 05:23:42 - 05:36:39 -826

Oliver 05:30:11 -50.3 Dark Up 36.2 95.4 Up 05:23:43 - 05:36:40 -861

Victoria 05:30:19 -48.3 Dark Up 33.7 91.9 Up 05:23:51 - 05:36:48 -863

Anarchist Mountain Observatory 05:30:11 -50.5 Dark Up 36.3 95.4 Up 05:23:43 - 05:36:40 -880

Okanogan 05:30:13 -50.6 Dark Up 36.2 94.7 Up 05:23:44 - 05:36:41 -941

Brewster 05:30:14 -50.6 Dark Up 36.1 94.4 Up 05:23:45 - 05:36:42 -965

Manson/Chelan 05:30:15 -50.5 Dark Up 35.9 94.0 Up 05:23:47 - 05:36:44 -980

Wenatchee 05:30:16 -50.6 Dark Up 35.8 93.5 Up 05:23:48 - 05:36:45 -1025

Ellensburg 05:30:18 -50.6 Dark Up 35.7 93.0 Up 05:23:49 - 05:36:46 -1063

Yakima 05:30:18 -50.8 Dark Up 35.7 92.7 Up 05:23:50 - 05:36:47 -1104

Toppenish/White Swan 05:30:19 -51.0 Dark Up 35.8 92.7 Up 05:23:50 - 05:36:47 -1129

PNWRO 05:30:17 -52.1 Dark Up 36.9 93.5 Up 05:23:48 - 05:36:45 -1190

The Dalles 05:30:22 -50.8 Dark Up 35.3 91.6 Up 05:23:53 - 05:36:50 -1194

Maupin 05:30:22 -51.0 Dark Up 35.4 91.3 Up 05:23:54 - 05:36:51 -1238

Sisters 05:30:25 -51.0 Dark Up 35.1 90.4 Up 05:23:57 - 05:36:54 -1319

Bend 05:30:25 -51.3 Dark Up 35.3 90.4 Up 05:23:57 - 05:36:54 -1348

Oregon Observatory 05:30:26 -51.2 Dark Up 35.2 90.2 Up 05:23:57 - 05:36:54 -1363

Chiloquin 05:30:29 -51.4 Dark Up 34.9 89.0 Up 05:24:01 - 05:36:58 -1491

Klamath Falls 05:30:29 -51.5 Dark Up 34.9 88.8 Up 05:24:01 - 05:36:58 -1528

Cedarville 05:30:27 -52.9 Dark Up 36.1 89.4 Up 05:23:59 - 05:36:56 -1629

Fall River/Burney 05:30:31 -52.2 Dark Up 35.2 88.2 Up 05:24:02 - 05:36:59 -1657

Greenville 05:30:32 -52.7 Dark Up 35.5 87.9 Up 05:24:03 - 05:37:00 -1760

Gimple 05:30:31 -52.8 Dark Up 35.6 87.9 Up 05:24:02 - 05:36:59 -1762

Quincy 05:30:32 -52.8 Dark Up 35.5 87.7 Up 05:24:03 - 05:37:00 -1782

Portola 05:30:31 -53.2 Dark Up 35.8 87.9 Up 05:24:03 - 05:37:00 -1803

Reno 05:30:30 -53.7 Dark Up 36.3 88.1 Up 05:24:02 - 05:36:59 -1843

Carson City 05:30:31 -53.8 Dark Up 36.3 87.9 Up 05:24:02 - 05:36:59 -1881

Gardnerville 05:30:31 -53.9 Dark Up 36.4 87.7 Up 05:24:02 - 05:36:59 -1908

Yerington 05:30:30 -54.4 Dark Up 36.8 88.1 Up 05:24:01 - 05:36:58 -1914

Dunrhomin 05:29:53 -63.6 Dark Up 47.4 98.7 Up 05:23:24 - 05:36:21 -1964

Hawthorne 05:30:29 -54.9 Dark Up 37.2 88.1 Up 05:24:01 - 05:36:58 -1972

Nikitin 05:29:53 -63.7 Dark Up 47.4 98.5 Up 05:23:25 - 05:36:22 -1984

CU-SBO 05:29:54 -63.6 Dark Up 47.3 98.4 Up 05:23:25 - 05:36:22 -1990

Lee Vining 05:30:31 -54.7 Dark Up 36.8 87.4 Up 05:24:03 - 05:37:00 -2023

Bishop 05:30:31 -55.4 Dark Up 37.4 87.4 Up 05:24:02 - 05:36:59 -2100

Beatty 05:30:27 -56.7 Dark Up 38.6 87.9 Up 05:23:59 - 05:36:56 -2177

Patrick 05:30:22 -59.4 Dark Up 40.9 88.3 Up 05:23:53 - 05:36:50 -2383

Laughlin/Bullhead City 05:30:24 -58.9 Dark Up 40.3 87.7 Up 05:23:56 - 05:36:53 -2399

Wildwood 05:30:35 -55.9 Dark Up 37.0 84.8 Up 05:24:06 - 05:37:03 -2446

Lake Havasu City 05:30:24 -59.2 Dark Up 40.5 87.3 Up 05:23:55 - 05:36:52 -2476

Idyllwild 05:30:31 -57.5 Dark Up 38.5 85.4 Up 05:24:02 - 05:36:59 -2518

George/Scottsdale 05:30:18 -61.4 Dark Up 42.5 87.9 Up 05:23:50 - 05:36:47 -2597

Calipatria 05:30:28 -58.6 Dark Up 39.4 85.5 Up 05:24:00 - 05:36:57 -2604

Yuma 05:30:27 -59.4 Dark Up 40.1 85.6 Up 05:23:58 - 05:36:55 -2666

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 2024/03/04 05:38:11 UT

Marc W. Buie, Southwest Research Institute

RECON

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
Kamloops	05:30:09	-49.1	Dark	Up	35.5	95.8	Up	05:23:41 - 05:36:38	-701
Sleaford	05:29:37	-55.3	Dark	Up	43.9	109.7	Up	05:23:09 - 05:36:06	-724
Kelowna	05:30:09	-50.0	Dark	Up	36.2	95.9	Up	05:23:41 - 05:36:38	-795
Peachland	05:30:10	-49.9	Dark	Up	36.0	95.6	Up	05:23:42 - 05:36:39	-801
Summerland	05:30:10	-50.0	Dark	Up	36.1	95.6	Up	05:23:42 - 05:36:39	-817
Penticton	05:30:11	-50.1	Dark	Up	36.1	95.6	Up	05:23:42 - 05:36:39	-826
Oliver	05:30:11	-50.3	Dark	Up	36.2	95.4	Up	05:23:43 - 05:36:40	-861
Victoria	05:30:19	-48.3	Dark	Up	33.7	91.9	Up	05:23:51 - 05:36:48	-863
Anarchist Mountain Observatory	05:30:11	-50.5	Dark	Up	36.3	95.4	Up	05:23:43 - 05:36:40	-880
Okanogan	05:30:13	-50.6	Dark	Up	36.2	94.7	Up	05:23:44 - 05:36:41	-941
Brewster	05:30:14	-50.6	Dark	Up	36.1	94.4	Up	05:23:45 - 05:36:42	-965
Manson/Chelan	05:30:15	-50.5	Dark	Up	35.9	94.0	Up	05:23:47 - 05:36:44	-980
Wenatchee	05:30:16	-50.6	Dark	Up	35.8	93.5	Up	05:23:48 - 05:36:45	-1025
Ellensburg	05:30:18	-50.6	Dark	Up	35.7	93.0	Up	05:23:49 - 05:36:46	-1063
Yakima	05:30:18	-50.8	Dark	Up	35.7	92.7	Up	05:23:50 - 05:36:47	-1104
Toppenish/White Swan	05:30:19	-51.0	Dark	Up	35.8	92.7	Up	05:23:50 - 05:36:47	-1129
PNWRO	05:30:17	-52.1	Dark	Up	36.9	93.5	Up	05:23:48 - 05:36:45	-1190
The Dalles	05:30:22	-50.8	Dark	Up	35.3	91.6	Up	05:23:53 - 05:36:50	-1194
Maupin	05:30:22	-51.0	Dark	Up	35.4	91.3	Up	05:23:54 - 05:36:51	-1238
Sisters	05:30:25	-51.0	Dark	Up	35.1	90.4	Up	05:23:57 - 05:36:54	-1319
Bend	05:30:25	-51.3	Dark	Up	35.3	90.4	Up	05:23:57 - 05:36:54	-1348
Oregon Observatory	05:30:26	-51.2	Dark	Up	35.2	90.2	Up	05:23:57 - 05:36:54	-1363
Chiloquin	05:30:29	-51.4	Dark	Up	34.9	89.0	Up	05:24:01 - 05:36:58	-1491
Klamath Falls	05:30:29	-51.5	Dark	Up	34.9	88.8	Up	05:24:01 - 05:36:58	-1528
Cedarville	05:30:27	-52.9	Dark	Up	36.1	89.4	Up	05:23:59 - 05:36:56	-1629
Fall River/Burney	05:30:31	-52.2	Dark	Up	35.2	88.2	Up	05:24:02 - 05:36:59	-1657
Greenville	05:30:32	-52.7	Dark	Up	35.5	87.9	Up	05:24:03 - 05:37:00	-1760
Gimple	05:30:31	-52.8	Dark	Up	35.6	87.9	Up	05:24:02 - 05:36:59	-1762
Quincy	05:30:32	-52.8	Dark	Up	35.5	87.7	Up	05:24:03 - 05:37:00	-1782
Portola	05:30:31	-53.2	Dark	Up	35.8	87.9	Up	05:24:03 - 05:37:00	-1803
Reno	05:30:30	-53.7	Dark	Up	36.3	88.1	Up	05:24:02 - 05:36:59	-1843
Carson City	05:30:31	-53.8	Dark	Up	36.3	87.9	Up	05:24:02 - 05:36:59	-1881
Gardnerville	05:30:31	-53.9	Dark	Up	36.4	87.7	Up	05:24:02 - 05:36:59	-1908
Yerington	05:30:30	-54.4	Dark	Up	36.8	88.1	Up	05:24:01 - 05:36:58	-1914
Dunrhomin	05:29:53	-63.6	Dark	Up	47.4	98.7	Up	05:23:24 - 05:36:21	-1964
Hawthorne	05:30:29	-54.9	Dark	Up	37.2	88.1	Up	05:24:01 - 05:36:58	-1972
Nikitin	05:29:53	-63.7	Dark	Up	47.4	98.5	Up	05:23:25 - 05:36:22	-1984
CU-SBO	05:29:54	-63.6	Dark	Up	47.3	98.4	Up	05:23:25 - 05:36:22	-1990
Lee Vining	05:30:31	-54.7	Dark	Up	36.8	87.4	Up	05:24:03 - 05:37:00	-2023
Bishop	05:30:31	-55.4	Dark	Up	37.4	87.4	Up	05:24:02 - 05:36:59	-2100
Beatty	05:30:27	-56.7	Dark	Up	38.6	87.9	Up	05:23:59 - 05:36:56	-2177
Patrick	05:30:22	-59.4	Dark	Up	40.9	88.3	Up	05:23:53 - 05:36:50	-2383
Laughlin/Bullhead City	05:30:24	-58.9	Dark	Up	40.3	87.7	Up	05:23:56 - 05:36:53	-2399
Wildwood	05:30:35	-55.9	Dark	Up	37.0	84.8	Up	05:24:06 - 05:37:03	-2446
Lake Havasu City	05:30:24	-59.2	Dark	Up	40.5	87.3	Up	05:23:55 - 05:36:52	-2476
Idyllwild	05:30:31	-57.5	Dark	Up	38.5	85.4	Up	05:24:02 - 05:36:59	-2518
George/Scottsdale	05:30:18	-61.4	Dark	Up	42.5	87.9	Up	05:23:50 - 05:36:47	-2597
Calipatria	05:30:28	-58.6	Dark	Up	39.4	85.5	Up	05:24:00 - 05:36:57	-2604
Yuma	05:30:27	-59.4	Dark	Up	40.1	85.6	Up	05:23:58 - 05:36:55	-2666