RECON: TNO occultation with 523644

Event between (523644) 10VX11 and star GA0900:01318105 with event index number of 1501789

Geocentric closest approach at 2026/01/22 05:35:23 UTC

J2000 position of star is 06:22:50.3 +01:10:22
Equinox of date position of star is 06:23:55.1 +01:09:39
Stellar brightness G=16.4, use SENSEUP=128
Star is 112 degrees from the moon. Moon is 12% illuminated.
TNO apparent brightness V=21.0

[RECON map]
TNO is 28.2 AU from the Sun and 27.4 AU from the Earth.
The TNO is moving 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 159 seconds.
The 1-sigma cross-track error in the shadow position is 1220 km.
The sky-plane scale is 19879.6 km/arcsec.

The TNO has an absolute magnitude Hv=6.4
Diameter=316.2 km assuming a 5% albedo -- 14.6 sec chord
Diameter=129.1 km assuming a 30% albedo -- 5.9 sec chord
Dynamical classification is 3:2E+6:4II

Star training set for 523644, (2026/01/22 05:35UT)
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 18.9 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)

Clarence Fulton 05:36:57 -47.2 Dark Down 40.3 167.9 Up 05:23:13 - 05:50:42 8217

Kelowna 05:36:57 -47.3 Dark Down 40.7 167.6 Up 05:23:12 - 05:50:41 8185

Peachland 05:36:59 -47.2 Dark Down 40.7 167.2 Up 05:23:14 - 05:50:43 8171

Summerland 05:36:58 -47.3 Dark Down 40.9 167.3 Up 05:23:13 - 05:50:42 8162

Penticton 05:36:57 -47.4 Dark Down 41.0 167.5 Up 05:23:13 - 05:50:42 8159

Oliver 05:36:58 -47.6 Dark Down 41.3 167.4 Up 05:23:13 - 05:50:42 8132

Anarchist Mountain Observatory 05:36:57 -47.8 Dark Down 41.5 167.6 Up 05:23:12 - 05:50:41 8124

Tonasket 05:36:56 -47.9 Dark Down 41.8 167.5 Up 05:23:11 - 05:50:40 8099

Okanogan 05:36:57 -48.0 Dark Down 42.1 167.2 Up 05:23:12 - 05:50:41 8070

Brewster 05:36:58 -48.0 Dark Down 42.3 166.9 Up 05:23:13 - 05:50:42 8045

Manson/Chelan 05:36:58 -47.9 Dark Down 42.5 166.3 Up 05:23:14 - 05:50:43 8021

Entiat 05:36:59 -48.0 Dark Down 42.7 166.2 Up 05:23:14 - 05:50:43 8002

Victoria 05:37:09 -45.7 Dark Down 41.3 162.2 Up 05:23:24 - 05:50:53 8001

Wenatchee 05:36:59 -48.0 Dark Down 42.9 166.0 Up 05:23:15 - 05:50:44 7980

Ellensburg 05:37:00 -48.1 Dark Down 43.3 165.6 Up 05:23:15 - 05:50:44 7943

Pasco 05:36:55 -49.3 Dark Down 44.2 167.4 Up 05:23:11 - 05:50:40 7916

Yakima 05:36:59 -48.3 Dark Down 43.7 165.5 Up 05:23:15 - 05:50:44 7911

PNWRO 05:36:54 -49.5 Dark Down 44.5 167.6 Up 05:23:09 - 05:50:38 7902

Toppenish/White Swan 05:36:59 -48.5 Dark Down 43.9 165.7 Up 05:23:14 - 05:50:43 7898

Goldendale 05:36:59 -48.4 Dark Down 44.4 165.0 Up 05:23:14 - 05:50:43 7844

The Dalles 05:37:01 -48.3 Dark Down 44.5 164.4 Up 05:23:17 - 05:50:46 7818

Maupin 05:37:00 -48.5 Dark Down 44.9 164.4 Up 05:23:16 - 05:50:45 7787

Niwot 05:36:00 -61.0 Dark Down 50.8 187.5 Up 05:22:15 - 05:49:44 7758

SwRI 05:36:00 -61.0 Dark Down 50.9 187.3 Up 05:22:15 - 05:49:44 7747

Redmond 05:37:00 -48.9 Dark Down 45.8 164.1 Up 05:23:16 - 05:50:45 7711

Sisters 05:37:00 -48.6 Dark Down 45.7 163.5 Up 05:23:16 - 05:50:45 7704

Bend 05:37:01 -48.8 Dark Down 46.0 163.8 Up 05:23:17 - 05:50:46 7690

Oregon Observatory 05:37:02 -48.8 Dark Down 46.1 163.6 Up 05:23:17 - 05:50:46 7673

La Pine/Gilchrist 05:37:01 -48.9 Dark Down 46.3 163.4 Up 05:23:17 - 05:50:46 7655

North Lake 05:36:59 -49.4 Dark Down 46.8 164.1 Up 05:23:15 - 05:50:44 7633

Paisley 05:36:58 -49.9 Dark Down 47.4 164.5 Up 05:23:13 - 05:50:42 7595

Lakeview 05:36:55 -50.2 Dark Down 48.0 164.6 Up 05:23:11 - 05:50:40 7557

Klamath Falls 05:37:00 -49.2 Dark Down 47.6 162.6 Up 05:23:16 - 05:50:45 7527

Cedarville 05:36:55 -50.6 Dark Down 48.6 164.7 Up 05:23:11 - 05:50:40 7506

Fall River/Burney 05:36:59 -49.9 Dark Down 48.8 162.7 Up 05:23:14 - 05:50:43 7435

Susanville 05:36:56 -50.6 Dark Down 49.6 163.6 Up 05:23:11 - 05:50:40 7399

Gimple 05:36:57 -50.6 Dark Down 49.8 163.2 Up 05:23:13 - 05:50:42 7370

Greenville 05:36:57 -50.5 Dark Down 49.8 163.1 Up 05:23:12 - 05:50:41 7368

Portola 05:36:56 -51.0 Dark Down 50.2 163.7 Up 05:23:12 - 05:50:41 7352

Quincy 05:36:57 -50.6 Dark Down 50.0 163.0 Up 05:23:12 - 05:50:41 7351

Reno 05:36:52 -51.5 Dark Down 50.6 164.6 Up 05:23:07 - 05:50:36 7344

Carson City 05:36:52 -51.7 Dark Down 51.0 164.5 Up 05:23:07 - 05:50:36 7314

Yerington 05:36:50 -52.2 Dark Down 51.3 165.4 Up 05:23:06 - 05:50:35 7312

Gardnerville 05:36:52 -51.8 Dark Down 51.2 164.5 Up 05:23:08 - 05:50:37 7293

Hawthorne 05:36:48 -52.7 Dark Down 51.8 166.1 Up 05:23:03 - 05:50:32 7285

Tonopah 05:36:43 -53.9 Dark Down 52.5 168.2 Up 05:22:58 - 05:50:27 7280

Lee Vining 05:36:48 -52.5 Dark Down 52.3 165.1 Up 05:23:04 - 05:50:33 7223

Beatty 05:36:39 -54.6 Dark Down 53.7 168.6 Up 05:22:55 - 05:50:24 7189

Bishop 05:36:46 -53.3 Dark Down 53.0 166.1 Up 05:23:02 - 05:50:31 7189

Indian Springs 05:36:35 -55.5 Dark Down 54.2 170.3 Up 05:22:50 - 05:50:19 7188

Henderson 05:36:31 -56.2 Dark Down 54.8 171.3 Up 05:22:47 - 05:50:16 7159

Patrick 05:36:27 -57.3 Dark Down 55.6 173.1 Up 05:22:42 - 05:50:11 7133

DCO 05:36:24 -57.9 Dark Down 55.9 174.3 Up 05:22:40 - 05:50:09 7124

Searchlight/Boulder City 05:36:32 -56.5 Dark Down 55.4 171.3 Up 05:22:47 - 05:50:16 7110

Kingman/Dolan Springs 05:36:27 -57.2 Dark Down 55.8 172.8 Up 05:22:42 - 05:50:11 7108

Laughlin/Bullhead City 05:36:30 -56.8 Dark Down 55.7 171.9 Up 05:22:45 - 05:50:14 7092

Mohave Valley 05:36:29 -56.9 Dark Down 56.0 171.8 Up 05:22:45 - 05:50:14 7067

Lake Havasu City 05:36:29 -57.2 Dark Down 56.4 172.2 Up 05:22:44 - 05:50:13 7038

George/Scottsdale 05:36:16 -59.4 Dark Down 57.4 176.5 Up 05:22:32 - 05:50:01 7035

Parker 05:36:28 -57.4 Dark Down 56.8 172.1 Up 05:22:43 - 05:50:12 7007

Blythe 05:36:27 -57.3 Dark Down 57.3 171.5 Up 05:22:42 - 05:50:11 6951

CPSLO 05:36:53 -52.1 Dark Down 54.5 161.6 Up 05:23:08 - 05:50:37 6945

Idyllwild 05:36:36 -55.6 Dark Down 56.8 167.7 Up 05:22:51 - 05:50:20 6906

Wildwood 05:36:44 -54.0 Dark Down 56.1 164.6 Up 05:23:00 - 05:50:29 6888

Calipatria 05:36:32 -56.7 Dark Down 57.6 169.7 Up 05:22:47 - 05:50:16 6881

Yuma 05:36:27 -57.5 Dark Down 58.2 171.2 Up 05:22:42 - 05:50:11 6866

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 05:35UT)
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 2020/11/20 02:54:38 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)
Clarence Fulton	05:36:57	-47.2	Dark	Down	40.3	167.9	Up	05:23:13 - 05:50:42	8217
Kelowna	05:36:57	-47.3	Dark	Down	40.7	167.6	Up	05:23:12 - 05:50:41	8185
Peachland	05:36:59	-47.2	Dark	Down	40.7	167.2	Up	05:23:14 - 05:50:43	8171
Summerland	05:36:58	-47.3	Dark	Down	40.9	167.3	Up	05:23:13 - 05:50:42	8162
Penticton	05:36:57	-47.4	Dark	Down	41.0	167.5	Up	05:23:13 - 05:50:42	8159
Oliver	05:36:58	-47.6	Dark	Down	41.3	167.4	Up	05:23:13 - 05:50:42	8132
Anarchist Mountain Observatory	05:36:57	-47.8	Dark	Down	41.5	167.6	Up	05:23:12 - 05:50:41	8124
Tonasket	05:36:56	-47.9	Dark	Down	41.8	167.5	Up	05:23:11 - 05:50:40	8099
Okanogan	05:36:57	-48.0	Dark	Down	42.1	167.2	Up	05:23:12 - 05:50:41	8070
Brewster	05:36:58	-48.0	Dark	Down	42.3	166.9	Up	05:23:13 - 05:50:42	8045
Manson/Chelan	05:36:58	-47.9	Dark	Down	42.5	166.3	Up	05:23:14 - 05:50:43	8021
Entiat	05:36:59	-48.0	Dark	Down	42.7	166.2	Up	05:23:14 - 05:50:43	8002
Victoria	05:37:09	-45.7	Dark	Down	41.3	162.2	Up	05:23:24 - 05:50:53	8001
Wenatchee	05:36:59	-48.0	Dark	Down	42.9	166.0	Up	05:23:15 - 05:50:44	7980
Ellensburg	05:37:00	-48.1	Dark	Down	43.3	165.6	Up	05:23:15 - 05:50:44	7943
Pasco	05:36:55	-49.3	Dark	Down	44.2	167.4	Up	05:23:11 - 05:50:40	7916
Yakima	05:36:59	-48.3	Dark	Down	43.7	165.5	Up	05:23:15 - 05:50:44	7911
PNWRO	05:36:54	-49.5	Dark	Down	44.5	167.6	Up	05:23:09 - 05:50:38	7902
Toppenish/White Swan	05:36:59	-48.5	Dark	Down	43.9	165.7	Up	05:23:14 - 05:50:43	7898
Goldendale	05:36:59	-48.4	Dark	Down	44.4	165.0	Up	05:23:14 - 05:50:43	7844
The Dalles	05:37:01	-48.3	Dark	Down	44.5	164.4	Up	05:23:17 - 05:50:46	7818
Maupin	05:37:00	-48.5	Dark	Down	44.9	164.4	Up	05:23:16 - 05:50:45	7787
Niwot	05:36:00	-61.0	Dark	Down	50.8	187.5	Up	05:22:15 - 05:49:44	7758
SwRI	05:36:00	-61.0	Dark	Down	50.9	187.3	Up	05:22:15 - 05:49:44	7747
Redmond	05:37:00	-48.9	Dark	Down	45.8	164.1	Up	05:23:16 - 05:50:45	7711
Sisters	05:37:00	-48.6	Dark	Down	45.7	163.5	Up	05:23:16 - 05:50:45	7704
Bend	05:37:01	-48.8	Dark	Down	46.0	163.8	Up	05:23:17 - 05:50:46	7690
Oregon Observatory	05:37:02	-48.8	Dark	Down	46.1	163.6	Up	05:23:17 - 05:50:46	7673
La Pine/Gilchrist	05:37:01	-48.9	Dark	Down	46.3	163.4	Up	05:23:17 - 05:50:46	7655
North Lake	05:36:59	-49.4	Dark	Down	46.8	164.1	Up	05:23:15 - 05:50:44	7633
Paisley	05:36:58	-49.9	Dark	Down	47.4	164.5	Up	05:23:13 - 05:50:42	7595
Lakeview	05:36:55	-50.2	Dark	Down	48.0	164.6	Up	05:23:11 - 05:50:40	7557
Klamath Falls	05:37:00	-49.2	Dark	Down	47.6	162.6	Up	05:23:16 - 05:50:45	7527
Cedarville	05:36:55	-50.6	Dark	Down	48.6	164.7	Up	05:23:11 - 05:50:40	7506
Fall River/Burney	05:36:59	-49.9	Dark	Down	48.8	162.7	Up	05:23:14 - 05:50:43	7435
Susanville	05:36:56	-50.6	Dark	Down	49.6	163.6	Up	05:23:11 - 05:50:40	7399
Gimple	05:36:57	-50.6	Dark	Down	49.8	163.2	Up	05:23:13 - 05:50:42	7370
Greenville	05:36:57	-50.5	Dark	Down	49.8	163.1	Up	05:23:12 - 05:50:41	7368
Portola	05:36:56	-51.0	Dark	Down	50.2	163.7	Up	05:23:12 - 05:50:41	7352
Quincy	05:36:57	-50.6	Dark	Down	50.0	163.0	Up	05:23:12 - 05:50:41	7351
Reno	05:36:52	-51.5	Dark	Down	50.6	164.6	Up	05:23:07 - 05:50:36	7344
Carson City	05:36:52	-51.7	Dark	Down	51.0	164.5	Up	05:23:07 - 05:50:36	7314
Yerington	05:36:50	-52.2	Dark	Down	51.3	165.4	Up	05:23:06 - 05:50:35	7312
Gardnerville	05:36:52	-51.8	Dark	Down	51.2	164.5	Up	05:23:08 - 05:50:37	7293
Hawthorne	05:36:48	-52.7	Dark	Down	51.8	166.1	Up	05:23:03 - 05:50:32	7285
Tonopah	05:36:43	-53.9	Dark	Down	52.5	168.2	Up	05:22:58 - 05:50:27	7280
Lee Vining	05:36:48	-52.5	Dark	Down	52.3	165.1	Up	05:23:04 - 05:50:33	7223
Beatty	05:36:39	-54.6	Dark	Down	53.7	168.6	Up	05:22:55 - 05:50:24	7189
Bishop	05:36:46	-53.3	Dark	Down	53.0	166.1	Up	05:23:02 - 05:50:31	7189
Indian Springs	05:36:35	-55.5	Dark	Down	54.2	170.3	Up	05:22:50 - 05:50:19	7188
Henderson	05:36:31	-56.2	Dark	Down	54.8	171.3	Up	05:22:47 - 05:50:16	7159
Patrick	05:36:27	-57.3	Dark	Down	55.6	173.1	Up	05:22:42 - 05:50:11	7133
DCO	05:36:24	-57.9	Dark	Down	55.9	174.3	Up	05:22:40 - 05:50:09	7124
Searchlight/Boulder City	05:36:32	-56.5	Dark	Down	55.4	171.3	Up	05:22:47 - 05:50:16	7110
Kingman/Dolan Springs	05:36:27	-57.2	Dark	Down	55.8	172.8	Up	05:22:42 - 05:50:11	7108
Laughlin/Bullhead City	05:36:30	-56.8	Dark	Down	55.7	171.9	Up	05:22:45 - 05:50:14	7092
Mohave Valley	05:36:29	-56.9	Dark	Down	56.0	171.8	Up	05:22:45 - 05:50:14	7067
Lake Havasu City	05:36:29	-57.2	Dark	Down	56.4	172.2	Up	05:22:44 - 05:50:13	7038
George/Scottsdale	05:36:16	-59.4	Dark	Down	57.4	176.5	Up	05:22:32 - 05:50:01	7035
Parker	05:36:28	-57.4	Dark	Down	56.8	172.1	Up	05:22:43 - 05:50:12	7007
Blythe	05:36:27	-57.3	Dark	Down	57.3	171.5	Up	05:22:42 - 05:50:11	6951
CPSLO	05:36:53	-52.1	Dark	Down	54.5	161.6	Up	05:23:08 - 05:50:37	6945
Idyllwild	05:36:36	-55.6	Dark	Down	56.8	167.7	Up	05:22:51 - 05:50:20	6906
Wildwood	05:36:44	-54.0	Dark	Down	56.1	164.6	Up	05:23:00 - 05:50:29	6888
Calipatria	05:36:32	-56.7	Dark	Down	57.6	169.7	Up	05:22:47 - 05:50:16	6881
Yuma	05:36:27	-57.5	Dark	Down	58.2	171.2	Up	05:22:42 - 05:50:11	6866