RECON: TNO occultation with 505624

Event between (505624) 14GU53 and star GA0900:04945067 with event index number of 1502506

Geocentric closest approach at 2026/05/20 07:17:04 UTC

J2000 position of star is 17:00:51.2 +00:44:50
Equinox of date position of star is 17:01:54.2 +00:43:06
Stellar brightness G=13.9, use SENSEUP=64
Star is 137 degrees from the moon. Moon is 17% illuminated.
TNO apparent brightness V=25.8

[RECON map]
TNO is 37.4 AU from the Sun and 36.5 AU from the Earth.
The TNO is moving 23.5 km/sec on the sky relative to the star, or, 3.2 arcsec/hr.
The 1-sigma error in the time of the event is 129 seconds.
The 1-sigma cross-track error in the shadow position is 1641 km.
The sky-plane scale is 26500.4 km/arcsec.

The TNO has an absolute magnitude Hv=10.0
Diameter=436.5 km assuming a 5% albedo -- 2.6 sec chord
Diameter=178.2 km assuming a 30% albedo -- 1.0 sec chord
Dynamical classification is SCATEXTD

Star training set for 505624, (2026/05/20 07:17UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:01.8 -26:29:17  0.9 28.22 142
60Bet Oph      17:44:46.6 +04:33:29  2.8 11.31 141
PPM 179990     17:06:53.9 -00:55:35  5.4  2.01 139
PPM 179983     17:05:02.6 -00:10:52  7.3  1.14 138
PPM 163395     17:02:34.7 +00:28:10 10.0  0.26 137
PPM 163391     17:02:27.0 +00:49:39 10.4  0.13 137
505624         17:02:11.9 +00:42:37 13.9       137
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 21.9 km RECON observability=1.0 and success probability=24.7%

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 07:19:13 -19.3 Dark Up 35.5 146.4 Up 07:07:59 - 07:30:27 1018

Kelowna 07:19:14 -19.7 Dark Up 35.8 146.1 Up 07:08:00 - 07:30:28 984

Peachland 07:19:15 -19.8 Dark Up 35.8 145.7 Up 07:08:01 - 07:30:29 971

Summerland 07:19:15 -19.9 Dark Up 35.9 145.8 Up 07:08:01 - 07:30:29 960

Penticton 07:19:15 -20.0 Dark Up 36.0 145.9 Up 07:08:01 - 07:30:29 956

Oliver 07:19:15 -20.4 Dark Up 36.3 145.7 Up 07:08:01 - 07:30:29 928

Anarchist Mountain Observatory 07:19:15 -20.6 Dark Up 36.5 145.9 Up 07:08:01 - 07:30:29 918

Tonasket 07:19:15 -20.9 Dark Up 36.8 145.7 Up 07:08:01 - 07:30:29 891

Okanogan 07:19:16 -21.2 Dark Up 37.0 145.3 Up 07:08:02 - 07:30:30 861

Brewster 07:19:17 -21.4 Dark Up 37.1 145.0 Up 07:08:03 - 07:30:31 835

Manson/Chelan 07:19:17 -21.6 Dark Up 37.2 144.5 Up 07:08:03 - 07:30:31 812

Victoria 07:19:26 -20.5 Dark Up 35.4 141.1 Up 07:08:12 - 07:30:40 811

Entiat 07:19:18 -21.8 Dark Up 37.3 144.3 Up 07:08:04 - 07:30:32 792

Wenatchee 07:19:19 -22.0 Dark Up 37.5 144.1 Up 07:08:05 - 07:30:33 769

Ellensburg 07:19:19 -22.4 Dark Up 37.7 143.6 Up 07:08:05 - 07:30:33 731

Yakima 07:19:20 -22.8 Dark Up 38.0 143.4 Up 07:08:06 - 07:30:34 696

Pasco 07:19:16 -23.3 Dark Up 38.9 144.9 Up 07:08:02 - 07:30:30 693

Toppenish/White Swan 07:19:19 -23.0 Dark Up 38.3 143.5 Up 07:08:05 - 07:30:33 681

PNWRO 07:19:15 -23.6 Dark Up 39.2 145.1 Up 07:08:01 - 07:30:29 676

Goldendale 07:19:21 -23.5 Dark Up 38.6 142.8 Up 07:08:07 - 07:30:35 627

The Dalles 07:19:22 -23.7 Dark Up 38.6 142.3 Up 07:08:08 - 07:30:36 601

Maupin 07:19:22 -24.1 Dark Up 39.0 142.2 Up 07:08:08 - 07:30:36 567

Redmond 07:19:23 -25.0 Dark Up 39.6 141.6 Up 07:08:09 - 07:30:37 487

Sisters 07:19:24 -24.9 Dark Up 39.4 141.2 Up 07:08:10 - 07:30:38 482

Bend 07:19:24 -25.2 Dark Up 39.7 141.3 Up 07:08:10 - 07:30:38 466

Oregon Observatory 07:19:24 -25.4 Dark Up 39.8 141.1 Up 07:08:10 - 07:30:38 448

Niwot 07:18:34 -29.7 Dark Down 49.0 160.3 Up 07:07:20 - 07:29:48 437

La Pine/Gilchrist 07:19:24 -25.6 Dark Up 39.9 140.9 Up 07:08:10 - 07:30:38 429

SwRI 07:18:34 -29.8 Dark Down 49.0 160.1 Up 07:07:20 - 07:29:48 425

North Lake 07:19:23 -26.1 Dark Up 40.6 141.4 Up 07:08:09 - 07:30:37 402

Paisley 07:19:22 -26.7 Dark Down 41.2 141.5 Up 07:08:08 - 07:30:36 359

Lakeview 07:19:22 -27.2 Dark Down 41.6 141.5 Up 07:08:08 - 07:30:36 318

Klamath Falls 07:19:26 -26.9 Dark Up 40.9 139.8 Up 07:08:12 - 07:30:40 295

Cedarville 07:19:22 -27.8 Dark Down 42.2 141.3 Up 07:08:08 - 07:30:36 262

Fall River/Burney 07:19:26 -28.2 Dark Down 42.0 139.6 Up 07:08:12 - 07:30:40 195

Susanville 07:19:24 -28.9 Dark Down 42.9 140.1 Up 07:08:10 - 07:30:38 152

Gimple 07:19:24 -29.1 Dark Down 43.0 139.7 Up 07:08:10 - 07:30:38 123

Greenville 07:19:25 -29.1 Dark Down 42.9 139.6 Up 07:08:11 - 07:30:39 121

Quincy 07:19:25 -29.3 Dark Down 43.1 139.5 Up 07:08:11 - 07:30:39 103

Portola 07:19:23 -29.5 Dark Down 43.4 139.9 Up 07:08:09 - 07:30:37 100

Reno 07:19:21 -29.8 Dark Down 43.9 140.6 Up 07:08:07 - 07:30:35 88

Carson City 07:19:22 -30.2 Dark Down 44.2 140.4 Up 07:08:08 - 07:30:36 56

Yerington 07:19:19 -30.5 Dark Down 44.7 141.0 Up 07:08:05 - 07:30:33 50

Gardnerville 07:19:21 -30.5 Dark Down 44.4 140.3 Up 07:08:07 - 07:30:35 34

Hawthorne 07:19:18 -31.0 Dark Down 45.3 141.4 Up 07:08:04 - 07:30:32 17

Tonopah 07:19:14 -31.6 Dark Down 46.4 142.8 Up 07:08:00 - 07:30:28 3

Lee Vining 07:19:20 -31.5 Dark Down 45.5 140.4 Up 07:08:06 - 07:30:34 -45

Bishop 07:19:18 -32.2 Dark Down 46.3 140.9 Up 07:08:04 - 07:30:32 -86

Beatty 07:19:12 -32.8 Dark Down 47.5 142.7 Up 07:07:58 - 07:30:26 -97

Indian Springs 07:19:09 -33.2 Dark Down 48.3 143.8 Up 07:07:55 - 07:30:23 -105

Henderson 07:19:06 -33.8 Dark Down 49.0 144.4 Up 07:07:52 - 07:30:20 -141

Patrick 07:19:03 -34.5 Dark Down 50.0 145.5 Up 07:07:49 - 07:30:17 -176

DCO 07:19:00 -34.8 Dark Down 50.6 146.2 Up 07:07:46 - 07:30:14 -189

Searchlight/Boulder City 07:19:06 -34.4 Dark Down 49.5 144.1 Up 07:07:52 - 07:30:20 -193

Kingman/Dolan Springs 07:19:03 -34.7 Dark Down 50.1 145.1 Up 07:07:49 - 07:30:17 -201

Laughlin/Bullhead City 07:19:05 -34.7 Dark Down 49.9 144.3 Up 07:07:51 - 07:30:19 -214

Mohave Valley 07:19:05 -35.0 Dark Down 50.1 144.2 Up 07:07:51 - 07:30:19 -240

Lake Havasu City 07:19:04 -35.4 Dark Down 50.6 144.2 Up 07:07:50 - 07:30:18 -273

George/Scottsdale 07:18:56 -36.3 Dark Down 52.4 147.1 Up 07:07:42 - 07:30:10 -293

Parker 07:19:04 -35.7 Dark Down 50.9 144.0 Up 07:07:50 - 07:30:18 -306

CPSLO 07:19:25 -33.9 Dark Down 46.7 136.7 Up 07:08:11 - 07:30:39 -328

Blythe 07:19:05 -36.2 Dark Down 51.2 143.2 Up 07:07:51 - 07:30:19 -362

Idyllwild 07:19:12 -36.0 Dark Down 50.0 140.5 Up 07:07:58 - 07:30:26 -396

Wildwood 07:19:19 -35.4 Dark Down 48.7 138.3 Up 07:08:05 - 07:30:33 -402

Calipatria 07:19:08 -36.7 Dark Down 51.1 141.6 Up 07:07:54 - 07:30:22 -430

Yuma 07:19:05 -37.2 Dark Down 51.9 142.4 Up 07:07:51 - 07:30:19 -452

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 505624, (2026/05/20 07:17UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 28.22 142
60Bet Oph      17:43:28.3 +04:34:06  2.8 11.31 141
PPM 179990     17:05:32.2 -00:53:32  5.4  2.01 139
PPM 179983     17:03:41.4 -00:08:45  7.3  1.14 138
PPM 163395     17:01:13.9 +00:30:23 10.0  0.26 137
PPM 163391     17:01:06.4 +00:51:52 10.4  0.13 137
505624         17:00:51.2 +00:44:50 13.9       137
Positions are for J2000

Event circumstances last updated at 2020/08/11 23:26:13 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	07:19:13	-19.3	Dark	Up	35.5	146.4	Up	07:07:59 - 07:30:27	1018
Kelowna	07:19:14	-19.7	Dark	Up	35.8	146.1	Up	07:08:00 - 07:30:28	984
Peachland	07:19:15	-19.8	Dark	Up	35.8	145.7	Up	07:08:01 - 07:30:29	971
Summerland	07:19:15	-19.9	Dark	Up	35.9	145.8	Up	07:08:01 - 07:30:29	960
Penticton	07:19:15	-20.0	Dark	Up	36.0	145.9	Up	07:08:01 - 07:30:29	956
Oliver	07:19:15	-20.4	Dark	Up	36.3	145.7	Up	07:08:01 - 07:30:29	928
Anarchist Mountain Observatory	07:19:15	-20.6	Dark	Up	36.5	145.9	Up	07:08:01 - 07:30:29	918
Tonasket	07:19:15	-20.9	Dark	Up	36.8	145.7	Up	07:08:01 - 07:30:29	891
Okanogan	07:19:16	-21.2	Dark	Up	37.0	145.3	Up	07:08:02 - 07:30:30	861
Brewster	07:19:17	-21.4	Dark	Up	37.1	145.0	Up	07:08:03 - 07:30:31	835
Manson/Chelan	07:19:17	-21.6	Dark	Up	37.2	144.5	Up	07:08:03 - 07:30:31	812
Victoria	07:19:26	-20.5	Dark	Up	35.4	141.1	Up	07:08:12 - 07:30:40	811
Entiat	07:19:18	-21.8	Dark	Up	37.3	144.3	Up	07:08:04 - 07:30:32	792
Wenatchee	07:19:19	-22.0	Dark	Up	37.5	144.1	Up	07:08:05 - 07:30:33	769
Ellensburg	07:19:19	-22.4	Dark	Up	37.7	143.6	Up	07:08:05 - 07:30:33	731
Yakima	07:19:20	-22.8	Dark	Up	38.0	143.4	Up	07:08:06 - 07:30:34	696
Pasco	07:19:16	-23.3	Dark	Up	38.9	144.9	Up	07:08:02 - 07:30:30	693
Toppenish/White Swan	07:19:19	-23.0	Dark	Up	38.3	143.5	Up	07:08:05 - 07:30:33	681
PNWRO	07:19:15	-23.6	Dark	Up	39.2	145.1	Up	07:08:01 - 07:30:29	676
Goldendale	07:19:21	-23.5	Dark	Up	38.6	142.8	Up	07:08:07 - 07:30:35	627
The Dalles	07:19:22	-23.7	Dark	Up	38.6	142.3	Up	07:08:08 - 07:30:36	601
Maupin	07:19:22	-24.1	Dark	Up	39.0	142.2	Up	07:08:08 - 07:30:36	567
Redmond	07:19:23	-25.0	Dark	Up	39.6	141.6	Up	07:08:09 - 07:30:37	487
Sisters	07:19:24	-24.9	Dark	Up	39.4	141.2	Up	07:08:10 - 07:30:38	482
Bend	07:19:24	-25.2	Dark	Up	39.7	141.3	Up	07:08:10 - 07:30:38	466
Oregon Observatory	07:19:24	-25.4	Dark	Up	39.8	141.1	Up	07:08:10 - 07:30:38	448
Niwot	07:18:34	-29.7	Dark	Down	49.0	160.3	Up	07:07:20 - 07:29:48	437
La Pine/Gilchrist	07:19:24	-25.6	Dark	Up	39.9	140.9	Up	07:08:10 - 07:30:38	429
SwRI	07:18:34	-29.8	Dark	Down	49.0	160.1	Up	07:07:20 - 07:29:48	425
North Lake	07:19:23	-26.1	Dark	Up	40.6	141.4	Up	07:08:09 - 07:30:37	402
Paisley	07:19:22	-26.7	Dark	Down	41.2	141.5	Up	07:08:08 - 07:30:36	359
Lakeview	07:19:22	-27.2	Dark	Down	41.6	141.5	Up	07:08:08 - 07:30:36	318
Klamath Falls	07:19:26	-26.9	Dark	Up	40.9	139.8	Up	07:08:12 - 07:30:40	295
Cedarville	07:19:22	-27.8	Dark	Down	42.2	141.3	Up	07:08:08 - 07:30:36	262
Fall River/Burney	07:19:26	-28.2	Dark	Down	42.0	139.6	Up	07:08:12 - 07:30:40	195
Susanville	07:19:24	-28.9	Dark	Down	42.9	140.1	Up	07:08:10 - 07:30:38	152
Gimple	07:19:24	-29.1	Dark	Down	43.0	139.7	Up	07:08:10 - 07:30:38	123
Greenville	07:19:25	-29.1	Dark	Down	42.9	139.6	Up	07:08:11 - 07:30:39	121
Quincy	07:19:25	-29.3	Dark	Down	43.1	139.5	Up	07:08:11 - 07:30:39	103
Portola	07:19:23	-29.5	Dark	Down	43.4	139.9	Up	07:08:09 - 07:30:37	100
Reno	07:19:21	-29.8	Dark	Down	43.9	140.6	Up	07:08:07 - 07:30:35	88
Carson City	07:19:22	-30.2	Dark	Down	44.2	140.4	Up	07:08:08 - 07:30:36	56
Yerington	07:19:19	-30.5	Dark	Down	44.7	141.0	Up	07:08:05 - 07:30:33	50
Gardnerville	07:19:21	-30.5	Dark	Down	44.4	140.3	Up	07:08:07 - 07:30:35	34
Hawthorne	07:19:18	-31.0	Dark	Down	45.3	141.4	Up	07:08:04 - 07:30:32	17
Tonopah	07:19:14	-31.6	Dark	Down	46.4	142.8	Up	07:08:00 - 07:30:28	3
Lee Vining	07:19:20	-31.5	Dark	Down	45.5	140.4	Up	07:08:06 - 07:30:34	-45
Bishop	07:19:18	-32.2	Dark	Down	46.3	140.9	Up	07:08:04 - 07:30:32	-86
Beatty	07:19:12	-32.8	Dark	Down	47.5	142.7	Up	07:07:58 - 07:30:26	-97
Indian Springs	07:19:09	-33.2	Dark	Down	48.3	143.8	Up	07:07:55 - 07:30:23	-105
Henderson	07:19:06	-33.8	Dark	Down	49.0	144.4	Up	07:07:52 - 07:30:20	-141
Patrick	07:19:03	-34.5	Dark	Down	50.0	145.5	Up	07:07:49 - 07:30:17	-176
DCO	07:19:00	-34.8	Dark	Down	50.6	146.2	Up	07:07:46 - 07:30:14	-189
Searchlight/Boulder City	07:19:06	-34.4	Dark	Down	49.5	144.1	Up	07:07:52 - 07:30:20	-193
Kingman/Dolan Springs	07:19:03	-34.7	Dark	Down	50.1	145.1	Up	07:07:49 - 07:30:17	-201
Laughlin/Bullhead City	07:19:05	-34.7	Dark	Down	49.9	144.3	Up	07:07:51 - 07:30:19	-214
Mohave Valley	07:19:05	-35.0	Dark	Down	50.1	144.2	Up	07:07:51 - 07:30:19	-240
Lake Havasu City	07:19:04	-35.4	Dark	Down	50.6	144.2	Up	07:07:50 - 07:30:18	-273
George/Scottsdale	07:18:56	-36.3	Dark	Down	52.4	147.1	Up	07:07:42 - 07:30:10	-293
Parker	07:19:04	-35.7	Dark	Down	50.9	144.0	Up	07:07:50 - 07:30:18	-306
CPSLO	07:19:25	-33.9	Dark	Down	46.7	136.7	Up	07:08:11 - 07:30:39	-328
Blythe	07:19:05	-36.2	Dark	Down	51.2	143.2	Up	07:07:51 - 07:30:19	-362
Idyllwild	07:19:12	-36.0	Dark	Down	50.0	140.5	Up	07:07:58 - 07:30:26	-396
Wildwood	07:19:19	-35.4	Dark	Down	48.7	138.3	Up	07:08:05 - 07:30:33	-402
Calipatria	07:19:08	-36.7	Dark	Down	51.1	141.6	Up	07:07:54 - 07:30:22	-430
Yuma	07:19:05	-37.2	Dark	Down	51.9	142.4	Up	07:07:51 - 07:30:19	-452