RECON: TNO occultation with 523644

Event between (523644) 10VX11 and star GA0900:01318105 with event index number of 2382265

Geocentric closest approach at 2026/01/22 05:33:42 UTC

J2000 position of star is 06:22:50.3 +01:10:22
Equinox of date position of star is 06:24:05.3 +01:09:32
Stellar brightness G=16.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 112 degrees from the moon. Moon is 12% illuminated.
Apparent brightness V=20.9

[RECON map]
Object is 28.2 AU from the Sun and 27.4 AU from the Earth.
Apparent velocity is 21.7 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 66 seconds.
The 1-sigma cross-track error in the shadow position is 1015 km.
The sky-plane scale is 19879.6 km/arcsec.

The object has an absolute magnitude Hv=6.3
Diameter=326.6 km assuming a 5% albedo -- 15.3 sec chord
Diameter=133.3 km assuming a 30% albedo -- 6.2 sec chord
Dynamical classification is 3:2E+6:4II

Star training set for 523644, (2026/01/22 05:36UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:35.0 +07:24:35  0.4  9.29 106
34Del Ori      05:33:20.4 -00:16:55  2.2 12.79  99
PPM 150472     06:26:39.5 +01:29:06  6.5  0.70 113
PPM 150381     06:23:59.0 +01:10:30  8.5  0.05 112
523644         06:24:11.2 +01:09:28 16.4       112
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 0.0 km RECON observability=1.0 and success probability=0.0%

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

Sleaford 05:34:38 -52.1 Dark Down 39.0 184.7 Up 05:28:37 - 05:40:40 9282

Kamloops 05:35:21 -46.2 Dark Down 39.7 166.1 Up 05:29:19 - 05:41:22 8890

Kelowna 05:35:18 -47.1 Dark Down 40.6 167.1 Up 05:29:16 - 05:41:19 8848

Peachland 05:35:17 -47.0 Dark Down 40.7 166.7 Up 05:29:15 - 05:41:18 8833

Summerland 05:35:18 -47.1 Dark Down 40.8 166.8 Up 05:29:16 - 05:41:19 8824

Penticton 05:35:17 -47.2 Dark Down 40.9 166.9 Up 05:29:15 - 05:41:18 8821

Oliver 05:35:17 -47.4 Dark Down 41.3 166.8 Up 05:29:15 - 05:41:18 8795

Anarchist Mountain Observatory 05:35:17 -47.6 Dark Down 41.4 167.1 Up 05:29:16 - 05:41:19 8786

Okanogan 05:35:18 -47.8 Dark Down 42.0 166.6 Up 05:29:17 - 05:41:20 8732

Brewster 05:35:18 -47.8 Dark Down 42.3 166.3 Up 05:29:17 - 05:41:20 8707

Manson/Chelan 05:35:20 -47.7 Dark Down 42.4 165.8 Up 05:29:18 - 05:41:21 8683

Victoria 05:35:29 -45.4 Dark Down 41.2 161.7 Up 05:29:28 - 05:41:31 8664

Wenatchee 05:35:19 -47.8 Dark Down 42.9 165.4 Up 05:29:18 - 05:41:21 8643

Ellensburg 05:35:18 -47.8 Dark Down 43.2 165.0 Up 05:29:17 - 05:41:20 8606

Yakima 05:35:20 -48.0 Dark Down 43.6 164.9 Up 05:29:19 - 05:41:22 8573

PNWRO 05:35:15 -49.3 Dark Down 44.4 167.1 Up 05:29:13 - 05:41:16 8564

Toppenish/White Swan 05:35:19 -48.2 Dark Down 43.8 165.1 Up 05:29:18 - 05:41:21 8559

The Dalles 05:35:22 -48.0 Dark Down 44.4 163.8 Up 05:29:20 - 05:41:23 8480

Maupin 05:35:22 -48.3 Dark Down 44.9 163.9 Up 05:29:20 - 05:41:23 8448

Dunrhomin 05:34:20 -60.7 Dark Down 50.7 186.8 Up 05:28:18 - 05:40:21 8430

Nikitin 05:34:20 -60.8 Dark Down 50.9 186.8 Up 05:28:18 - 05:40:21 8415

CU-SBO 05:34:20 -60.7 Dark Down 51.0 186.7 Up 05:28:19 - 05:40:22 8407

Sisters 05:35:23 -48.3 Dark Down 45.6 162.9 Up 05:29:21 - 05:41:24 8366

Bend 05:35:22 -48.6 Dark Down 45.9 163.2 Up 05:29:20 - 05:41:23 8352

Oregon Observatory 05:35:22 -48.6 Dark Down 46.0 163.0 Up 05:29:20 - 05:41:23 8335

Chiloquin 05:35:22 -48.8 Dark Down 47.2 162.0 Up 05:29:20 - 05:41:23 8215

Klamath Falls 05:35:23 -48.9 Dark Down 47.5 162.0 Up 05:29:21 - 05:41:24 8188

Cedarville 05:35:15 -50.3 Dark Down 48.6 164.1 Up 05:29:13 - 05:41:16 8167

Fall River/Burney 05:35:21 -49.6 Dark Down 48.8 162.1 Up 05:29:19 - 05:41:22 8096

Gimple 05:35:18 -50.3 Dark Down 49.7 162.6 Up 05:29:17 - 05:41:20 8031

Greenville 05:35:18 -50.2 Dark Down 49.7 162.5 Up 05:29:17 - 05:41:20 8029

Portola 05:35:15 -50.7 Dark Down 50.1 163.0 Up 05:29:13 - 05:41:16 8012

Quincy 05:35:18 -50.3 Dark Down 49.9 162.4 Up 05:29:17 - 05:41:20 8012

Reno 05:35:13 -51.2 Dark Down 50.5 163.9 Up 05:29:12 - 05:41:15 8005

Carson City 05:35:14 -51.4 Dark Down 50.9 163.9 Up 05:29:13 - 05:41:16 7974

Yerington 05:35:11 -51.9 Dark Down 51.2 164.8 Up 05:29:09 - 05:41:12 7973

Gardnerville 05:35:13 -51.5 Dark Down 51.1 163.8 Up 05:29:12 - 05:41:15 7954

Hawthorne 05:35:09 -52.4 Dark Down 51.8 165.4 Up 05:29:08 - 05:41:11 7946

Lee Vining 05:35:10 -52.2 Dark Down 52.2 164.5 Up 05:29:08 - 05:41:11 7884

Beatty 05:35:00 -54.3 Dark Down 53.7 167.9 Up 05:28:58 - 05:41:01 7850

Bishop 05:35:07 -53.0 Dark Down 52.9 165.4 Up 05:29:06 - 05:41:09 7849

Patrick 05:34:47 -57.0 Dark Down 55.5 172.4 Up 05:28:45 - 05:40:48 7793

Laughlin/Bullhead City 05:34:49 -56.5 Dark Down 55.7 171.1 Up 05:28:48 - 05:40:51 7752

Lake Havasu City 05:34:48 -56.9 Dark Down 56.4 171.4 Up 05:28:46 - 05:40:49 7698

George/Scottsdale 05:34:38 -59.1 Dark Down 57.4 175.7 Up 05:28:37 - 05:40:40 7694

Idyllwild 05:34:57 -55.3 Dark Down 56.8 167.0 Up 05:28:55 - 05:40:58 7566

Wildwood 05:35:06 -53.7 Dark Down 56.0 163.8 Up 05:29:05 - 05:41:08 7548

Calipatria 05:34:52 -56.4 Dark Down 57.6 168.9 Up 05:28:51 - 05:40:54 7541

Yuma 05:34:49 -57.2 Dark Down 58.1 170.4 Up 05:28:47 - 05:40:50 7525

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 523644, (2026/01/22 05:36UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  9.29 106
34Del Ori      05:32:00.4 -00:17:57  2.2 12.79  99
PPM 150472     06:25:18.5 +01:30:05  6.5  0.70 113
PPM 150381     06:22:38.1 +01:11:23  8.5  0.05 112
523644         06:22:50.3 +01:10:22 16.4       112
Positions are for J2000

Event circumstances last updated at 2024/03/04 05:39:00 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)
Sleaford	05:34:38	-52.1	Dark	Down	39.0	184.7	Up	05:28:37 - 05:40:40	9282
Kamloops	05:35:21	-46.2	Dark	Down	39.7	166.1	Up	05:29:19 - 05:41:22	8890
Kelowna	05:35:18	-47.1	Dark	Down	40.6	167.1	Up	05:29:16 - 05:41:19	8848
Peachland	05:35:17	-47.0	Dark	Down	40.7	166.7	Up	05:29:15 - 05:41:18	8833
Summerland	05:35:18	-47.1	Dark	Down	40.8	166.8	Up	05:29:16 - 05:41:19	8824
Penticton	05:35:17	-47.2	Dark	Down	40.9	166.9	Up	05:29:15 - 05:41:18	8821
Oliver	05:35:17	-47.4	Dark	Down	41.3	166.8	Up	05:29:15 - 05:41:18	8795
Anarchist Mountain Observatory	05:35:17	-47.6	Dark	Down	41.4	167.1	Up	05:29:16 - 05:41:19	8786
Okanogan	05:35:18	-47.8	Dark	Down	42.0	166.6	Up	05:29:17 - 05:41:20	8732
Brewster	05:35:18	-47.8	Dark	Down	42.3	166.3	Up	05:29:17 - 05:41:20	8707
Manson/Chelan	05:35:20	-47.7	Dark	Down	42.4	165.8	Up	05:29:18 - 05:41:21	8683
Victoria	05:35:29	-45.4	Dark	Down	41.2	161.7	Up	05:29:28 - 05:41:31	8664
Wenatchee	05:35:19	-47.8	Dark	Down	42.9	165.4	Up	05:29:18 - 05:41:21	8643
Ellensburg	05:35:18	-47.8	Dark	Down	43.2	165.0	Up	05:29:17 - 05:41:20	8606
Yakima	05:35:20	-48.0	Dark	Down	43.6	164.9	Up	05:29:19 - 05:41:22	8573
PNWRO	05:35:15	-49.3	Dark	Down	44.4	167.1	Up	05:29:13 - 05:41:16	8564
Toppenish/White Swan	05:35:19	-48.2	Dark	Down	43.8	165.1	Up	05:29:18 - 05:41:21	8559
The Dalles	05:35:22	-48.0	Dark	Down	44.4	163.8	Up	05:29:20 - 05:41:23	8480
Maupin	05:35:22	-48.3	Dark	Down	44.9	163.9	Up	05:29:20 - 05:41:23	8448
Dunrhomin	05:34:20	-60.7	Dark	Down	50.7	186.8	Up	05:28:18 - 05:40:21	8430
Nikitin	05:34:20	-60.8	Dark	Down	50.9	186.8	Up	05:28:18 - 05:40:21	8415
CU-SBO	05:34:20	-60.7	Dark	Down	51.0	186.7	Up	05:28:19 - 05:40:22	8407
Sisters	05:35:23	-48.3	Dark	Down	45.6	162.9	Up	05:29:21 - 05:41:24	8366
Bend	05:35:22	-48.6	Dark	Down	45.9	163.2	Up	05:29:20 - 05:41:23	8352
Oregon Observatory	05:35:22	-48.6	Dark	Down	46.0	163.0	Up	05:29:20 - 05:41:23	8335
Chiloquin	05:35:22	-48.8	Dark	Down	47.2	162.0	Up	05:29:20 - 05:41:23	8215
Klamath Falls	05:35:23	-48.9	Dark	Down	47.5	162.0	Up	05:29:21 - 05:41:24	8188
Cedarville	05:35:15	-50.3	Dark	Down	48.6	164.1	Up	05:29:13 - 05:41:16	8167
Fall River/Burney	05:35:21	-49.6	Dark	Down	48.8	162.1	Up	05:29:19 - 05:41:22	8096
Gimple	05:35:18	-50.3	Dark	Down	49.7	162.6	Up	05:29:17 - 05:41:20	8031
Greenville	05:35:18	-50.2	Dark	Down	49.7	162.5	Up	05:29:17 - 05:41:20	8029
Portola	05:35:15	-50.7	Dark	Down	50.1	163.0	Up	05:29:13 - 05:41:16	8012
Quincy	05:35:18	-50.3	Dark	Down	49.9	162.4	Up	05:29:17 - 05:41:20	8012
Reno	05:35:13	-51.2	Dark	Down	50.5	163.9	Up	05:29:12 - 05:41:15	8005
Carson City	05:35:14	-51.4	Dark	Down	50.9	163.9	Up	05:29:13 - 05:41:16	7974
Yerington	05:35:11	-51.9	Dark	Down	51.2	164.8	Up	05:29:09 - 05:41:12	7973
Gardnerville	05:35:13	-51.5	Dark	Down	51.1	163.8	Up	05:29:12 - 05:41:15	7954
Hawthorne	05:35:09	-52.4	Dark	Down	51.8	165.4	Up	05:29:08 - 05:41:11	7946
Lee Vining	05:35:10	-52.2	Dark	Down	52.2	164.5	Up	05:29:08 - 05:41:11	7884
Beatty	05:35:00	-54.3	Dark	Down	53.7	167.9	Up	05:28:58 - 05:41:01	7850
Bishop	05:35:07	-53.0	Dark	Down	52.9	165.4	Up	05:29:06 - 05:41:09	7849
Patrick	05:34:47	-57.0	Dark	Down	55.5	172.4	Up	05:28:45 - 05:40:48	7793
Laughlin/Bullhead City	05:34:49	-56.5	Dark	Down	55.7	171.1	Up	05:28:48 - 05:40:51	7752
Lake Havasu City	05:34:48	-56.9	Dark	Down	56.4	171.4	Up	05:28:46 - 05:40:49	7698
George/Scottsdale	05:34:38	-59.1	Dark	Down	57.4	175.7	Up	05:28:37 - 05:40:40	7694
Idyllwild	05:34:57	-55.3	Dark	Down	56.8	167.0	Up	05:28:55 - 05:40:58	7566
Wildwood	05:35:06	-53.7	Dark	Down	56.0	163.8	Up	05:29:05 - 05:41:08	7548
Calipatria	05:34:52	-56.4	Dark	Down	57.6	168.9	Up	05:28:51 - 05:40:54	7541
Yuma	05:34:49	-57.2	Dark	Down	58.1	170.4	Up	05:28:47 - 05:40:50	7525