RECON: TNO occultation with 578833

Event between (578833) 14GV53 and star GA0820:06342461 with event index number of 2552060

Geocentric closest approach at 2026/05/13 08:39:38 UTC

J2000 position of star is 17:39:30.3 -06:46:35
Equinox of date position of star is 17:40:44.2 -06:47:14
Stellar brightness G=16.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 99 degrees from the moon. Moon is 16% illuminated.
TNO apparent brightness V=22.2

[RECON map]
TNO is 36.4 AU from the Sun and 35.6 AU from the Earth.
The TNO is moving 19.5 km/sec on the sky relative to the star, or, 2.7 arcsec/hr.
The 1-sigma error in the time of the event is 199 seconds.
The 1-sigma cross-track error in the shadow position is 1455 km.
The sky-plane scale is 25812.7 km/arcsec.

The TNO has an absolute magnitude Hv=6.5
Diameter=299.2 km assuming a 5% albedo -- 15.3 sec chord
Diameter=122.2 km assuming a 30% albedo -- 6.3 sec chord
Dynamical classification is SCATNEAR

Star training set for 578833, (2026/05/13 08:40UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:01.7 -26:29:17  0.9 25.78 115
60Bet Oph      17:44:46.6 +04:33:29  2.8 11.39  97
PPM 200792     17:34:54.4 -05:45:42  5.6  1.81 101
PPM 200979     17:45:12.5 -07:05:23  6.7  1.10  98
PPM 200916     17:41:29.5 -06:57:27  9.6  0.22  99
578833         17:40:55.6 -06:47:20 16.9        99
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 4.5 sigma about the mid-time.
The median site spacing is 21.0 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 08:41:14 -16.1 AT Down 30.6 169.2 Up 08:26:14 - 08:56:14 11719

Kamloops 08:42:01 -20.2 Dark Down 29.0 152.9 Low 08:27:01 - 08:57:01 11378

Kelowna 08:41:59 -20.9 Dark Down 30.0 153.7 Up 08:26:59 - 08:56:59 11340

Peachland 08:42:01 -21.0 Dark Down 30.0 153.4 Up 08:27:01 - 08:57:01 11327

Summerland 08:42:01 -21.2 Dark Down 30.2 153.4 Up 08:27:01 - 08:57:01 11318

Penticton 08:42:00 -21.2 Dark Down 30.3 153.5 Up 08:27:00 - 08:57:00 11316

Oliver 08:42:01 -21.6 Dark Down 30.6 153.4 Up 08:27:01 - 08:57:01 11292

Anarchist Mountain Observatory 08:41:59 -21.7 Dark Down 30.8 153.6 Up 08:26:59 - 08:56:59 11284

Okanogan 08:42:01 -22.4 Dark Down 31.3 153.2 Up 08:27:01 - 08:57:01 11234

Brewster 08:42:02 -22.7 Dark Down 31.5 152.9 Up 08:27:02 - 08:57:02 11211

Manson/Chelan 08:42:03 -22.9 Dark Down 31.6 152.4 Up 08:27:03 - 08:57:03 11190

Victoria 08:42:13 -22.7 Dark Down 30.0 149.1 Low 08:27:13 - 08:57:13 11173

Wenatchee 08:42:02 -23.4 Dark Down 31.9 152.1 Up 08:27:02 - 08:57:02 11153

Ellensburg 08:42:04 -23.8 Dark Down 32.2 151.7 Up 08:27:04 - 08:57:04 11119

Yakima 08:42:06 -24.2 Dark Down 32.6 151.6 Up 08:27:06 - 08:57:06 11089

PNWRO 08:42:01 -24.6 Dark Down 33.6 153.3 Up 08:27:01 - 08:57:01 11079

Toppenish/White Swan 08:42:05 -24.4 Dark Down 32.8 151.7 Up 08:27:05 - 08:57:05 11076

The Dalles 08:42:09 -25.3 Dark Down 33.3 150.6 Up 08:27:09 - 08:57:09 11003

Maupin 08:42:09 -25.7 Dark Down 33.7 150.6 Up 08:27:09 - 08:57:09 10974

Dunrhomin 08:41:09 -26.5 Dark Down 42.3 168.4 Up 08:26:09 - 08:56:09 10928

CU-SBO 08:41:08 -26.8 Dark Down 42.5 168.2 Up 08:26:08 - 08:56:08 10907

Sisters 08:42:12 -26.6 Dark Down 34.3 149.8 Up 08:27:12 - 08:57:12 10898

Bend 08:42:09 -26.8 Dark Down 34.6 150.0 Up 08:27:09 - 08:57:09 10885

Oregon Observatory 08:42:11 -27.0 Dark Down 34.7 149.8 Up 08:27:11 - 08:57:11 10869

Chiloquin 08:42:14 -28.4 Dark Down 35.6 148.8 Up 08:27:14 - 08:57:14 10758

Klamath Falls 08:42:14 -28.7 Dark Down 36.0 148.8 Up 08:27:14 - 08:57:14 10733

Cedarville 08:42:08 -29.1 Dark Down 37.2 150.4 Up 08:27:08 - 08:57:08 10712

Fall River/Burney 08:42:11 -29.8 Dark Down 37.1 148.8 Up 08:27:11 - 08:57:11 10647

Gimple 08:42:09 -30.6 Dark Down 38.1 149.0 Up 08:27:09 - 08:57:09 10585

Greenville 08:42:11 -30.6 Dark Down 38.1 148.9 Up 08:27:11 - 08:57:11 10583

Portola 08:42:10 -30.9 Dark Down 38.5 149.3 Up 08:27:10 - 08:57:10 10567

Quincy 08:42:12 -30.8 Dark Down 38.2 148.8 Up 08:27:12 - 08:57:12 10567

Reno 08:42:06 -31.0 Dark Down 39.0 150.0 Up 08:27:06 - 08:57:06 10560

Carson City 08:42:08 -31.4 Dark Down 39.3 149.9 Up 08:27:08 - 08:57:08 10531

Yerington 08:42:06 -31.4 Dark Down 39.7 150.5 Up 08:27:06 - 08:57:06 10529

Gardnerville 08:42:08 -31.6 Dark Down 39.6 149.8 Up 08:27:08 - 08:57:08 10512

Hawthorne 08:42:04 -31.8 Dark Down 40.4 151.0 Up 08:27:04 - 08:57:04 10502

Lee Vining 08:42:05 -32.4 Dark Down 40.7 150.1 Up 08:27:05 - 08:57:05 10445

Bishop 08:42:03 -32.9 Dark Down 41.5 150.8 Up 08:27:03 - 08:57:03 10410

Beatty 08:41:56 -33.0 Dark Down 42.5 152.5 Up 08:26:56 - 08:56:56 10408

Patrick 08:41:43 -33.7 Dark Down 44.8 155.6 Up 08:26:43 - 08:56:43 10348

Laughlin/Bullhead City 08:41:48 -34.1 Dark Down 44.8 154.6 Up 08:26:48 - 08:56:48 10311

Lake Havasu City 08:41:45 -34.7 Dark Down 45.5 154.6 Up 08:26:45 - 08:56:45 10259

George/Scottsdale 08:41:34 -34.7 Dark Down 47.0 157.5 Up 08:26:34 - 08:56:34 10249

Idyllwild 08:41:56 -36.0 Dark Down 45.3 151.2 Up 08:26:56 - 08:56:56 10138

Wildwood 08:42:05 -36.1 Dark Down 44.2 149.0 Up 08:27:05 - 08:57:05 10125

Calipatria 08:41:51 -36.3 Dark Down 46.3 152.4 Up 08:26:51 - 08:56:51 10112

Yuma 08:41:48 -36.4 Dark Down 47.0 153.4 Up 08:26:48 - 08:56:48 10095

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 578833, (2026/05/13 08:40UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 25.78 115
60Bet Oph      17:43:28.3 +04:34:06  2.8 11.39  97
PPM 200792     17:33:29.8 -05:44:43  5.6  1.81 101
PPM 200979     17:43:47.1 -07:04:48  6.7  1.10  98
PPM 200916     17:40:04.2 -06:56:42  9.6  0.22  99
578833         17:39:30.3 -06:46:35 16.9        99
Positions are for J2000

Event circumstances last updated at 2022/11/02 02:09:52 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	08:41:14	-16.1	AT	Down	30.6	169.2	Up	08:26:14 - 08:56:14	11719
Kamloops	08:42:01	-20.2	Dark	Down	29.0	152.9	Low	08:27:01 - 08:57:01	11378
Kelowna	08:41:59	-20.9	Dark	Down	30.0	153.7	Up	08:26:59 - 08:56:59	11340
Peachland	08:42:01	-21.0	Dark	Down	30.0	153.4	Up	08:27:01 - 08:57:01	11327
Summerland	08:42:01	-21.2	Dark	Down	30.2	153.4	Up	08:27:01 - 08:57:01	11318
Penticton	08:42:00	-21.2	Dark	Down	30.3	153.5	Up	08:27:00 - 08:57:00	11316
Oliver	08:42:01	-21.6	Dark	Down	30.6	153.4	Up	08:27:01 - 08:57:01	11292
Anarchist Mountain Observatory	08:41:59	-21.7	Dark	Down	30.8	153.6	Up	08:26:59 - 08:56:59	11284
Okanogan	08:42:01	-22.4	Dark	Down	31.3	153.2	Up	08:27:01 - 08:57:01	11234
Brewster	08:42:02	-22.7	Dark	Down	31.5	152.9	Up	08:27:02 - 08:57:02	11211
Manson/Chelan	08:42:03	-22.9	Dark	Down	31.6	152.4	Up	08:27:03 - 08:57:03	11190
Victoria	08:42:13	-22.7	Dark	Down	30.0	149.1	Low	08:27:13 - 08:57:13	11173
Wenatchee	08:42:02	-23.4	Dark	Down	31.9	152.1	Up	08:27:02 - 08:57:02	11153
Ellensburg	08:42:04	-23.8	Dark	Down	32.2	151.7	Up	08:27:04 - 08:57:04	11119
Yakima	08:42:06	-24.2	Dark	Down	32.6	151.6	Up	08:27:06 - 08:57:06	11089
PNWRO	08:42:01	-24.6	Dark	Down	33.6	153.3	Up	08:27:01 - 08:57:01	11079
Toppenish/White Swan	08:42:05	-24.4	Dark	Down	32.8	151.7	Up	08:27:05 - 08:57:05	11076
The Dalles	08:42:09	-25.3	Dark	Down	33.3	150.6	Up	08:27:09 - 08:57:09	11003
Maupin	08:42:09	-25.7	Dark	Down	33.7	150.6	Up	08:27:09 - 08:57:09	10974
Dunrhomin	08:41:09	-26.5	Dark	Down	42.3	168.4	Up	08:26:09 - 08:56:09	10928
CU-SBO	08:41:08	-26.8	Dark	Down	42.5	168.2	Up	08:26:08 - 08:56:08	10907
Sisters	08:42:12	-26.6	Dark	Down	34.3	149.8	Up	08:27:12 - 08:57:12	10898
Bend	08:42:09	-26.8	Dark	Down	34.6	150.0	Up	08:27:09 - 08:57:09	10885
Oregon Observatory	08:42:11	-27.0	Dark	Down	34.7	149.8	Up	08:27:11 - 08:57:11	10869
Chiloquin	08:42:14	-28.4	Dark	Down	35.6	148.8	Up	08:27:14 - 08:57:14	10758
Klamath Falls	08:42:14	-28.7	Dark	Down	36.0	148.8	Up	08:27:14 - 08:57:14	10733
Cedarville	08:42:08	-29.1	Dark	Down	37.2	150.4	Up	08:27:08 - 08:57:08	10712
Fall River/Burney	08:42:11	-29.8	Dark	Down	37.1	148.8	Up	08:27:11 - 08:57:11	10647
Gimple	08:42:09	-30.6	Dark	Down	38.1	149.0	Up	08:27:09 - 08:57:09	10585
Greenville	08:42:11	-30.6	Dark	Down	38.1	148.9	Up	08:27:11 - 08:57:11	10583
Portola	08:42:10	-30.9	Dark	Down	38.5	149.3	Up	08:27:10 - 08:57:10	10567
Quincy	08:42:12	-30.8	Dark	Down	38.2	148.8	Up	08:27:12 - 08:57:12	10567
Reno	08:42:06	-31.0	Dark	Down	39.0	150.0	Up	08:27:06 - 08:57:06	10560
Carson City	08:42:08	-31.4	Dark	Down	39.3	149.9	Up	08:27:08 - 08:57:08	10531
Yerington	08:42:06	-31.4	Dark	Down	39.7	150.5	Up	08:27:06 - 08:57:06	10529
Gardnerville	08:42:08	-31.6	Dark	Down	39.6	149.8	Up	08:27:08 - 08:57:08	10512
Hawthorne	08:42:04	-31.8	Dark	Down	40.4	151.0	Up	08:27:04 - 08:57:04	10502
Lee Vining	08:42:05	-32.4	Dark	Down	40.7	150.1	Up	08:27:05 - 08:57:05	10445
Bishop	08:42:03	-32.9	Dark	Down	41.5	150.8	Up	08:27:03 - 08:57:03	10410
Beatty	08:41:56	-33.0	Dark	Down	42.5	152.5	Up	08:26:56 - 08:56:56	10408
Patrick	08:41:43	-33.7	Dark	Down	44.8	155.6	Up	08:26:43 - 08:56:43	10348
Laughlin/Bullhead City	08:41:48	-34.1	Dark	Down	44.8	154.6	Up	08:26:48 - 08:56:48	10311
Lake Havasu City	08:41:45	-34.7	Dark	Down	45.5	154.6	Up	08:26:45 - 08:56:45	10259
George/Scottsdale	08:41:34	-34.7	Dark	Down	47.0	157.5	Up	08:26:34 - 08:56:34	10249
Idyllwild	08:41:56	-36.0	Dark	Down	45.3	151.2	Up	08:26:56 - 08:56:56	10138
Wildwood	08:42:05	-36.1	Dark	Down	44.2	149.0	Up	08:27:05 - 08:57:05	10125
Calipatria	08:41:51	-36.3	Dark	Down	46.3	152.4	Up	08:26:51 - 08:56:51	10112
Yuma	08:41:48	-36.4	Dark	Down	47.0	153.4	Up	08:26:48 - 08:56:48	10095