RECON: TNO occultation with 05EX318

Event between 05EX318 and star GA0820:04481119 with event index number of 1986379

Geocentric closest approach at 2024/03/28 05:31:36 UTC

J2000 position of star is 14:13:11.6 -06:42:05
Equinox of date position of star is 14:14:27.4 -06:48:45
Stellar brightness G=16.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 11 degrees from the moon. Moon is 92% illuminated.
Apparent brightness V=22.7

[RECON map]
Object is 36.8 AU from the Sun and 35.9 AU from the Earth.
Apparent velocity is 21.8 km/sec on the sky relative to the star, or, 3.0 arcsec/hr.
The 1-sigma error in the time of the event is 200 seconds.
The 1-sigma cross-track error in the shadow position is 3257 km.
The sky-plane scale is 26059.5 km/arcsec.

The object has an absolute magnitude Hv=7.0
Diameter=243.2 km assuming a 5% albedo -- 11.2 sec chord
Diameter=99.3 km assuming a 30% albedo -- 4.6 sec chord
Dynamical classification is 3:2E

Star training set for 05EX318, (2024/03/28 05:32UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:28.4 -11:17:13  1.0 12.66  16
99Iot Vir      14:17:17.4 -06:06:53  4.1  0.99  11
PPM 197333     14:15:33.3 -07:10:06  8.3  0.44  11
PPM 197322     14:14:48.1 -07:04:14  9.5  0.27  11
05EX318        14:14:28.3 -06:48:50 16.7        11
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 30.6 km RECON observability=0.2 and success probability=6.0%

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

Sleaford 05:35:15 -31.3 Dark Up 17.8 127.8 Really Low 05:20:15 - 05:50:15 -2502

Kamloops 05:35:39 -27.2 Dark Up 10.9 115.0 Really Low 05:20:39 - 05:50:39 -2926

Kelowna 05:35:39 -28.2 Dark Up 11.8 115.6 Really Low 05:20:39 - 05:50:39 -2982

Peachland 05:35:39 -28.2 Dark Up 11.7 115.4 Really Low 05:20:39 - 05:50:39 -2998

Summerland 05:35:40 -28.3 Dark Up 11.8 115.4 Really Low 05:20:40 - 05:50:40 -3009

Penticton 05:35:40 -28.4 Dark Up 11.9 115.5 Really Low 05:20:40 - 05:50:40 -3013

Oliver 05:35:41 -28.7 Dark Up 12.0 115.4 Really Low 05:20:41 - 05:50:41 -3045

Anarchist Mountain Observatory 05:35:41 -28.9 Dark Up 12.2 115.5 Really Low 05:20:41 - 05:50:41 -3057

Okanogan 05:35:43 -29.3 Dark Up 12.4 115.2 Really Low 05:20:43 - 05:50:43 -3121

Brewster 05:35:42 -29.4 Dark Up 12.4 115.0 Really Low 05:20:42 - 05:50:42 -3150

Manson/Chelan 05:35:45 -29.4 Dark Up 12.2 114.7 Really Low 05:20:45 - 05:50:45 -3177

Victoria 05:35:46 -27.4 Dark Down 10.0 112.2 Really Low 05:20:46 - 05:50:46 -3180

Wenatchee 05:35:45 -29.6 Dark Up 12.3 114.5 Really Low 05:20:45 - 05:50:45 -3224

Ellensburg 05:35:46 -29.8 Dark Up 12.4 114.2 Really Low 05:20:46 - 05:50:46 -3267

Yakima 05:35:48 -30.1 Dark Up 12.5 114.1 Really Low 05:20:48 - 05:50:48 -3306

Toppenish/White Swan 05:35:47 -30.3 Dark Up 12.7 114.2 Really Low 05:20:47 - 05:50:47 -3323

PNWRO 05:35:46 -31.3 Dark Up 13.8 115.3 Really Low 05:20:46 - 05:50:46 -3326

The Dalles 05:35:49 -30.5 Dark Up 12.5 113.4 Really Low 05:20:49 - 05:50:49 -3413

Maupin 05:35:50 -30.8 Dark Up 12.8 113.4 Really Low 05:20:50 - 05:50:50 -3450

Dunrhomin 05:35:29 -41.9 Dark Up 25.3 124.7 Low 05:20:29 - 05:50:29 -3522

Nikitin 05:35:30 -42.1 Dark Up 25.4 124.6 Low 05:20:30 - 05:50:30 -3540

Sisters 05:35:53 -31.2 Dark Up 12.8 112.9 Really Low 05:20:53 - 05:50:53 -3545

CU-SBO 05:35:30 -42.1 Dark Up 25.4 124.5 Low 05:20:30 - 05:50:30 -3548

Bend 05:35:53 -31.5 Dark Up 13.1 113.0 Really Low 05:20:53 - 05:50:53 -3562

Oregon Observatory 05:35:53 -31.5 Dark Up 13.0 112.9 Really Low 05:20:53 - 05:50:53 -3581

Chiloquin 05:35:55 -32.2 Dark Up 13.3 112.3 Really Low 05:20:55 - 05:50:55 -3718

Klamath Falls 05:35:56 -32.5 Dark Up 13.5 112.3 Really Low 05:20:56 - 05:50:56 -3750

Cedarville 05:35:55 -33.8 Dark Up 14.8 113.3 Really Low 05:20:55 - 05:50:55 -3783

Fall River/Burney 05:35:58 -33.5 Dark Up 14.2 112.3 Really Low 05:20:58 - 05:50:58 -3858

Gimple 05:35:57 -34.4 Dark Up 14.9 112.5 Really Low 05:20:57 - 05:50:57 -3936

Greenville 05:35:58 -34.3 Dark Up 14.8 112.4 Really Low 05:20:58 - 05:50:58 -3938

Quincy 05:35:58 -34.5 Dark Up 14.9 112.4 Really Low 05:20:58 - 05:50:58 -3958

Portola 05:35:57 -34.8 Dark Up 15.3 112.7 Really Low 05:20:57 - 05:50:57 -3959

Reno 05:35:56 -35.4 Dark Up 15.9 113.1 Really Low 05:20:56 - 05:50:56 -3971

Carson City 05:35:56 -35.6 Dark Up 16.0 113.0 Really Low 05:20:56 - 05:50:56 -4006

Yerington 05:35:56 -36.1 Dark Up 16.6 113.4 Really Low 05:20:56 - 05:50:56 -4010

Gardnerville 05:35:58 -35.8 Dark Up 16.2 113.0 Really Low 05:20:58 - 05:50:58 -4029

Hawthorne 05:35:57 -36.7 Dark Up 17.1 113.7 Really Low 05:20:57 - 05:50:57 -4044

Lee Vining 05:35:58 -36.8 Dark Up 17.0 113.2 Really Low 05:20:58 - 05:50:58 -4112

Bishop 05:35:58 -37.7 Dark Up 17.8 113.5 Really Low 05:20:58 - 05:50:58 -4154

Beatty 05:35:54 -38.9 Dark Up 19.1 114.5 Really Low 05:20:54 - 05:50:54 -4160

Patrick 05:35:52 -41.6 Dark Up 21.9 116.1 Low 05:20:52 - 05:50:52 -4233

Laughlin/Bullhead City 05:35:53 -41.4 Dark Up 21.5 115.5 Low 05:20:53 - 05:50:53 -4276

Lake Havasu City 05:35:53 -42.0 Dark Up 21.9 115.4 Low 05:20:53 - 05:50:53 -4337

George/Scottsdale 05:35:49 -44.0 Dark Up 24.1 116.9 Low 05:20:49 - 05:50:49 -4346

Idyllwild 05:35:58 -41.1 Dark Up 20.5 113.5 Low 05:20:58 - 05:50:58 -4478

Wildwood 05:36:00 -39.7 Dark Up 18.9 112.4 Really Low 05:21:00 - 05:51:00 -4490

Calipatria 05:35:55 -42.3 Dark Up 21.6 114.1 Low 05:20:55 - 05:50:55 -4508

Yuma 05:35:54 -43.1 Dark Up 22.5 114.5 Low 05:20:54 - 05:50:54 -4528

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 05EX318, (2024/03/28 05:32UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 12.66  16
99Iot Vir      14:16:00.9 -06:00:11  4.1  0.99  11
PPM 197333     14:14:16.5 -07:03:22  8.3  0.44  11
PPM 197322     14:13:31.4 -06:57:29  9.5  0.27  11
05EX318        14:13:11.6 -06:42:05 16.7        11
Positions are for J2000

Event circumstances last updated at 2023/12/16 05:09:09 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	05:35:15	-31.3	Dark	Up	17.8	127.8	Really Low	05:20:15 - 05:50:15	-2502
Kamloops	05:35:39	-27.2	Dark	Up	10.9	115.0	Really Low	05:20:39 - 05:50:39	-2926
Kelowna	05:35:39	-28.2	Dark	Up	11.8	115.6	Really Low	05:20:39 - 05:50:39	-2982
Peachland	05:35:39	-28.2	Dark	Up	11.7	115.4	Really Low	05:20:39 - 05:50:39	-2998
Summerland	05:35:40	-28.3	Dark	Up	11.8	115.4	Really Low	05:20:40 - 05:50:40	-3009
Penticton	05:35:40	-28.4	Dark	Up	11.9	115.5	Really Low	05:20:40 - 05:50:40	-3013
Oliver	05:35:41	-28.7	Dark	Up	12.0	115.4	Really Low	05:20:41 - 05:50:41	-3045
Anarchist Mountain Observatory	05:35:41	-28.9	Dark	Up	12.2	115.5	Really Low	05:20:41 - 05:50:41	-3057
Okanogan	05:35:43	-29.3	Dark	Up	12.4	115.2	Really Low	05:20:43 - 05:50:43	-3121
Brewster	05:35:42	-29.4	Dark	Up	12.4	115.0	Really Low	05:20:42 - 05:50:42	-3150
Manson/Chelan	05:35:45	-29.4	Dark	Up	12.2	114.7	Really Low	05:20:45 - 05:50:45	-3177
Victoria	05:35:46	-27.4	Dark	Down	10.0	112.2	Really Low	05:20:46 - 05:50:46	-3180
Wenatchee	05:35:45	-29.6	Dark	Up	12.3	114.5	Really Low	05:20:45 - 05:50:45	-3224
Ellensburg	05:35:46	-29.8	Dark	Up	12.4	114.2	Really Low	05:20:46 - 05:50:46	-3267
Yakima	05:35:48	-30.1	Dark	Up	12.5	114.1	Really Low	05:20:48 - 05:50:48	-3306
Toppenish/White Swan	05:35:47	-30.3	Dark	Up	12.7	114.2	Really Low	05:20:47 - 05:50:47	-3323
PNWRO	05:35:46	-31.3	Dark	Up	13.8	115.3	Really Low	05:20:46 - 05:50:46	-3326
The Dalles	05:35:49	-30.5	Dark	Up	12.5	113.4	Really Low	05:20:49 - 05:50:49	-3413
Maupin	05:35:50	-30.8	Dark	Up	12.8	113.4	Really Low	05:20:50 - 05:50:50	-3450
Dunrhomin	05:35:29	-41.9	Dark	Up	25.3	124.7	Low	05:20:29 - 05:50:29	-3522
Nikitin	05:35:30	-42.1	Dark	Up	25.4	124.6	Low	05:20:30 - 05:50:30	-3540
Sisters	05:35:53	-31.2	Dark	Up	12.8	112.9	Really Low	05:20:53 - 05:50:53	-3545
CU-SBO	05:35:30	-42.1	Dark	Up	25.4	124.5	Low	05:20:30 - 05:50:30	-3548
Bend	05:35:53	-31.5	Dark	Up	13.1	113.0	Really Low	05:20:53 - 05:50:53	-3562
Oregon Observatory	05:35:53	-31.5	Dark	Up	13.0	112.9	Really Low	05:20:53 - 05:50:53	-3581
Chiloquin	05:35:55	-32.2	Dark	Up	13.3	112.3	Really Low	05:20:55 - 05:50:55	-3718
Klamath Falls	05:35:56	-32.5	Dark	Up	13.5	112.3	Really Low	05:20:56 - 05:50:56	-3750
Cedarville	05:35:55	-33.8	Dark	Up	14.8	113.3	Really Low	05:20:55 - 05:50:55	-3783
Fall River/Burney	05:35:58	-33.5	Dark	Up	14.2	112.3	Really Low	05:20:58 - 05:50:58	-3858
Gimple	05:35:57	-34.4	Dark	Up	14.9	112.5	Really Low	05:20:57 - 05:50:57	-3936
Greenville	05:35:58	-34.3	Dark	Up	14.8	112.4	Really Low	05:20:58 - 05:50:58	-3938
Quincy	05:35:58	-34.5	Dark	Up	14.9	112.4	Really Low	05:20:58 - 05:50:58	-3958
Portola	05:35:57	-34.8	Dark	Up	15.3	112.7	Really Low	05:20:57 - 05:50:57	-3959
Reno	05:35:56	-35.4	Dark	Up	15.9	113.1	Really Low	05:20:56 - 05:50:56	-3971
Carson City	05:35:56	-35.6	Dark	Up	16.0	113.0	Really Low	05:20:56 - 05:50:56	-4006
Yerington	05:35:56	-36.1	Dark	Up	16.6	113.4	Really Low	05:20:56 - 05:50:56	-4010
Gardnerville	05:35:58	-35.8	Dark	Up	16.2	113.0	Really Low	05:20:58 - 05:50:58	-4029
Hawthorne	05:35:57	-36.7	Dark	Up	17.1	113.7	Really Low	05:20:57 - 05:50:57	-4044
Lee Vining	05:35:58	-36.8	Dark	Up	17.0	113.2	Really Low	05:20:58 - 05:50:58	-4112
Bishop	05:35:58	-37.7	Dark	Up	17.8	113.5	Really Low	05:20:58 - 05:50:58	-4154
Beatty	05:35:54	-38.9	Dark	Up	19.1	114.5	Really Low	05:20:54 - 05:50:54	-4160
Patrick	05:35:52	-41.6	Dark	Up	21.9	116.1	Low	05:20:52 - 05:50:52	-4233
Laughlin/Bullhead City	05:35:53	-41.4	Dark	Up	21.5	115.5	Low	05:20:53 - 05:50:53	-4276
Lake Havasu City	05:35:53	-42.0	Dark	Up	21.9	115.4	Low	05:20:53 - 05:50:53	-4337
George/Scottsdale	05:35:49	-44.0	Dark	Up	24.1	116.9	Low	05:20:49 - 05:50:49	-4346
Idyllwild	05:35:58	-41.1	Dark	Up	20.5	113.5	Low	05:20:58 - 05:50:58	-4478
Wildwood	05:36:00	-39.7	Dark	Up	18.9	112.4	Really Low	05:21:00 - 05:51:00	-4490
Calipatria	05:35:55	-42.3	Dark	Up	21.6	114.1	Low	05:20:55 - 05:50:55	-4508
Yuma	05:35:54	-43.1	Dark	Up	22.5	114.5	Low	05:20:54 - 05:50:54	-4528