RECON: TNO occultation with 508338

Event between (508338) 15SO20 and star GA1080:00265797 with event index number of 2245011

Geocentric closest approach at 2022/09/04 08:32:24 UTC

J2000 position of star is 02:34:04.0 +18:14:29
Equinox of date position of star is 02:35:17.5 +18:20:12
Stellar brightness G=14.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 142 degrees from the moon. Moon is 57% illuminated.
TNO apparent brightness V=22.1

[RECON map]
TNO is 33.5 AU from the Sun and 33.0 AU from the Earth.
The TNO is moving 9.5 km/sec on the sky relative to the star, or, 1.4 arcsec/hr.
The 1-sigma error in the time of the event is 167 seconds.
The 1-sigma cross-track error in the shadow position is 1588 km.
The sky-plane scale is 23951.1 km/arcsec.

The TNO has an absolute magnitude Hv=6.7
Diameter=279.3 km assuming a 5% albedo -- 29.3 sec chord
Diameter=114.0 km assuming a 30% albedo -- 12.0 sec chord
Dynamical classification is CENTAURS

Star training set for 508338, (2022/09/04 08:34UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:13.5 +16:33:11  0.8 29.09 167
Hamal          02:08:27.4 +23:34:07  2.0  8.17 138
27 Ari         02:32:10.1 +17:48:11  6.2  0.92 141
PPM 118332     02:34:52.9 +18:58:44  7.1  0.65 142
PPM 118318     02:33:49.0 +18:34:36  9.3  0.43 142
PPM 118346     02:35:59.0 +18:05:43 10.3  0.29 142
508338         02:35:20.0 +18:20:23 14.5       143
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 25.1 km RECON observability=1.0 and success probability=10.9%

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

Sleaford 08:36:48 -27.5 Dark Down 48.0 131.6 Up 08:22:21 - 08:51:15 4385

Kamloops 08:38:16 -31.6 Dark Down 41.4 114.7 Up 08:23:49 - 08:52:43 4356

Kelowna 08:38:16 -32.3 Dark Down 42.3 114.9 Up 08:23:49 - 08:52:43 4271

Peachland 08:38:18 -32.4 Dark Down 42.1 114.5 Up 08:23:51 - 08:52:45 4264

Summerland 08:38:18 -32.6 Dark Down 42.3 114.5 Up 08:23:51 - 08:52:45 4249

Penticton 08:38:18 -32.6 Dark Down 42.3 114.6 Up 08:23:51 - 08:52:45 4242

Oliver 08:38:20 -33.0 Dark Down 42.5 114.3 Up 08:23:53 - 08:52:47 4208

Anarchist Mountain Observatory 08:38:19 -33.1 Dark Down 42.7 114.3 Up 08:23:52 - 08:52:46 4191

Victoria 08:38:44 -34.1 Dark Down 40.5 110.1 Up 08:24:17 - 08:53:11 4187

Tonasket 08:38:22 -33.4 Dark Down 42.8 114.0 Up 08:23:55 - 08:52:49 4162

Okanogan 08:38:25 -33.8 Dark Down 42.8 113.6 Up 08:23:58 - 08:52:52 4131

Brewster 08:38:28 -34.1 Dark Down 42.8 113.2 Up 08:24:01 - 08:52:55 4107

Manson/Chelan 08:38:30 -34.3 Dark Down 42.7 112.6 Up 08:24:03 - 08:52:57 4091

Wenatchee 08:38:33 -34.8 Dark Down 42.8 112.1 Up 08:24:06 - 08:53:00 4048

Ellensburg 08:38:37 -35.2 Dark Down 42.8 111.5 Up 08:24:10 - 08:53:04 4010

Yakima 08:38:39 -35.6 Dark Down 42.9 111.2 Up 08:24:12 - 08:53:06 3971

Toppenish/White Swan 08:38:39 -35.8 Dark Down 43.1 111.2 Up 08:24:12 - 08:53:06 3948

Pasco 08:38:32 -35.8 Dark Down 44.0 112.2 Up 08:24:05 - 08:52:59 3923

Goldendale 08:38:44 -36.4 Dark Down 43.0 110.3 Up 08:24:17 - 08:53:11 3900

PNWRO 08:38:32 -36.0 Dark Down 44.2 112.2 Up 08:24:05 - 08:52:59 3897

The Dalles 08:38:46 -36.7 Dark Down 42.9 109.7 Up 08:24:19 - 08:53:13 3882

Maupin 08:38:47 -37.1 Dark Down 43.1 109.5 Up 08:24:20 - 08:53:14 3840

Sisters 08:38:54 -38.0 Dark Down 43.1 108.3 Up 08:24:27 - 08:53:21 3759

Redmond 08:38:54 -38.0 Dark Down 43.4 108.6 Up 08:24:27 - 08:53:21 3752

Bend 08:38:55 -38.2 Dark Down 43.3 108.3 Up 08:24:28 - 08:53:22 3733

Oregon Observatory 08:38:57 -38.4 Dark Down 43.3 108.0 Up 08:24:30 - 08:53:24 3717

La Pine/Gilchrist 08:38:58 -38.6 Dark Down 43.3 107.8 Up 08:24:31 - 08:53:25 3698

North Lake 08:38:57 -39.0 Dark Down 43.9 107.9 Up 08:24:30 - 08:53:24 3647

Chiloquin 08:39:05 -39.8 Dark Down 43.4 106.5 Up 08:24:38 - 08:53:32 3591

Paisley 08:38:57 -39.4 Dark Down 44.3 107.8 Up 08:24:30 - 08:53:24 3588

Klamath Falls 08:39:07 -40.1 Dark Down 43.6 106.3 Up 08:24:40 - 08:53:34 3556

Lakeview 08:38:57 -39.9 Dark Down 44.6 107.5 Up 08:24:30 - 08:53:24 3535

Cedarville 08:38:59 -40.5 Dark Down 44.9 107.0 Up 08:24:32 - 08:53:26 3467

Fall River/Burney 08:39:09 -41.2 Dark Down 44.2 105.5 Up 08:24:42 - 08:53:36 3433

Susanville 08:39:08 -41.7 Dark Down 44.9 105.6 Up 08:24:41 - 08:53:35 3360

Greenville 08:39:09 -42.0 Dark Down 44.8 105.0 Up 08:24:42 - 08:53:36 3335

Gimple 08:39:08 -42.0 Dark Down 44.8 105.1 Up 08:24:41 - 08:53:35 3334

Quincy 08:39:11 -42.2 Dark Down 44.8 104.9 Up 08:24:44 - 08:53:38 3315

Portola 08:39:08 -42.2 Dark Down 45.2 105.1 Up 08:24:41 - 08:53:35 3296

Reno 08:39:06 -42.4 Dark Down 45.7 105.4 Up 08:24:39 - 08:53:33 3261

Carson City 08:39:06 -42.7 Dark Down 45.9 105.1 Up 08:24:39 - 08:53:33 3224

Dunrhomin 08:37:20 -37.5 Dark Down 55.5 120.5 Up 08:22:53 - 08:51:47 3213

Gardnerville 08:39:07 -43.0 Dark Down 46.0 104.9 Up 08:24:40 - 08:53:34 3199

Yerington 08:39:03 -42.8 Dark Down 46.4 105.4 Up 08:24:36 - 08:53:30 3197

Hawthorne 08:39:01 -43.1 Dark Down 46.9 105.4 Up 08:24:34 - 08:53:28 3143

Lee Vining 08:39:06 -43.8 Dark Down 46.7 104.4 Up 08:24:39 - 08:53:33 3090

Tonopah 08:38:53 -43.3 Dark Down 48.1 106.1 Up 08:24:26 - 08:53:20 3079

Bishop 08:39:04 -44.2 Dark Down 47.4 104.4 Up 08:24:37 - 08:53:31 3020

Beatty 08:38:53 -44.3 Dark Down 48.7 105.2 Up 08:24:26 - 08:53:20 2953

Indian Springs 08:38:48 -44.3 Dark Down 49.6 105.7 Up 08:24:21 - 08:53:15 2908

Henderson 08:38:45 -44.6 Dark Down 50.3 105.7 Up 08:24:18 - 08:53:12 2845

CPSLO 08:39:25 -46.6 Dark Down 46.1 100.5 Up 08:24:58 - 08:53:52 2831

Patrick 08:38:39 -44.9 Dark Down 51.3 105.9 Up 08:24:12 - 08:53:06 2768

Laughlin/Bullhead City 08:38:43 -45.3 Dark Down 50.8 105.0 Up 08:24:16 - 08:53:10 2749

Kingman/Dolan Springs 08:38:40 -45.1 Dark Down 51.2 105.5 Up 08:24:13 - 08:53:07 2746

Mohave Valley 08:38:44 -45.5 Dark Down 50.9 104.7 Up 08:24:17 - 08:53:11 2720

Wildwood 08:39:16 -47.4 Dark Down 48.0 100.7 Up 08:24:49 - 08:53:43 2679

Lake Havasu City 08:38:44 -45.8 Dark Down 51.2 104.4 Up 08:24:17 - 08:53:11 2675

Parker 08:38:45 -46.2 Dark Down 51.3 104.0 Up 08:24:18 - 08:53:12 2637

Idyllwild 08:39:04 -47.2 Dark Down 49.5 101.7 Up 08:24:37 - 08:53:31 2619

Blythe 08:38:49 -46.7 Dark Down 51.2 103.1 Up 08:24:22 - 08:53:16 2584

George/Scottsdale 08:38:27 -45.7 Dark Down 53.3 105.4 Up 08:24:00 - 08:52:54 2569

Calipatria 08:38:57 -47.5 Dark Down 50.6 101.9 Up 08:24:30 - 08:53:24 2541

Yuma 08:38:51 -47.6 Dark Down 51.4 102.0 Up 08:24:24 - 08:53:18 2486

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 508338, (2022/09/04 08:34UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 29.09 167
Hamal          02:07:10.7 +23:27:41  2.0  8.17 138
27 Ari         02:30:54.4 +17:42:12  6.2  0.92 141
PPM 118332     02:33:36.7 +18:52:48  7.1  0.65 142
PPM 118318     02:32:33.0 +18:28:39  9.3  0.43 142
PPM 118346     02:34:43.1 +17:59:49 10.3  0.29 142
508338         02:34:04.0 +18:14:29 14.5       142
Positions are for J2000

Event circumstances last updated at 2021/12/08 01:49:08 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	08:36:48	-27.5	Dark	Down	48.0	131.6	Up	08:22:21 - 08:51:15	4385
Kamloops	08:38:16	-31.6	Dark	Down	41.4	114.7	Up	08:23:49 - 08:52:43	4356
Kelowna	08:38:16	-32.3	Dark	Down	42.3	114.9	Up	08:23:49 - 08:52:43	4271
Peachland	08:38:18	-32.4	Dark	Down	42.1	114.5	Up	08:23:51 - 08:52:45	4264
Summerland	08:38:18	-32.6	Dark	Down	42.3	114.5	Up	08:23:51 - 08:52:45	4249
Penticton	08:38:18	-32.6	Dark	Down	42.3	114.6	Up	08:23:51 - 08:52:45	4242
Oliver	08:38:20	-33.0	Dark	Down	42.5	114.3	Up	08:23:53 - 08:52:47	4208
Anarchist Mountain Observatory	08:38:19	-33.1	Dark	Down	42.7	114.3	Up	08:23:52 - 08:52:46	4191
Victoria	08:38:44	-34.1	Dark	Down	40.5	110.1	Up	08:24:17 - 08:53:11	4187
Tonasket	08:38:22	-33.4	Dark	Down	42.8	114.0	Up	08:23:55 - 08:52:49	4162
Okanogan	08:38:25	-33.8	Dark	Down	42.8	113.6	Up	08:23:58 - 08:52:52	4131
Brewster	08:38:28	-34.1	Dark	Down	42.8	113.2	Up	08:24:01 - 08:52:55	4107
Manson/Chelan	08:38:30	-34.3	Dark	Down	42.7	112.6	Up	08:24:03 - 08:52:57	4091
Wenatchee	08:38:33	-34.8	Dark	Down	42.8	112.1	Up	08:24:06 - 08:53:00	4048
Ellensburg	08:38:37	-35.2	Dark	Down	42.8	111.5	Up	08:24:10 - 08:53:04	4010
Yakima	08:38:39	-35.6	Dark	Down	42.9	111.2	Up	08:24:12 - 08:53:06	3971
Toppenish/White Swan	08:38:39	-35.8	Dark	Down	43.1	111.2	Up	08:24:12 - 08:53:06	3948
Pasco	08:38:32	-35.8	Dark	Down	44.0	112.2	Up	08:24:05 - 08:52:59	3923
Goldendale	08:38:44	-36.4	Dark	Down	43.0	110.3	Up	08:24:17 - 08:53:11	3900
PNWRO	08:38:32	-36.0	Dark	Down	44.2	112.2	Up	08:24:05 - 08:52:59	3897
The Dalles	08:38:46	-36.7	Dark	Down	42.9	109.7	Up	08:24:19 - 08:53:13	3882
Maupin	08:38:47	-37.1	Dark	Down	43.1	109.5	Up	08:24:20 - 08:53:14	3840
Sisters	08:38:54	-38.0	Dark	Down	43.1	108.3	Up	08:24:27 - 08:53:21	3759
Redmond	08:38:54	-38.0	Dark	Down	43.4	108.6	Up	08:24:27 - 08:53:21	3752
Bend	08:38:55	-38.2	Dark	Down	43.3	108.3	Up	08:24:28 - 08:53:22	3733
Oregon Observatory	08:38:57	-38.4	Dark	Down	43.3	108.0	Up	08:24:30 - 08:53:24	3717
La Pine/Gilchrist	08:38:58	-38.6	Dark	Down	43.3	107.8	Up	08:24:31 - 08:53:25	3698
North Lake	08:38:57	-39.0	Dark	Down	43.9	107.9	Up	08:24:30 - 08:53:24	3647
Chiloquin	08:39:05	-39.8	Dark	Down	43.4	106.5	Up	08:24:38 - 08:53:32	3591
Paisley	08:38:57	-39.4	Dark	Down	44.3	107.8	Up	08:24:30 - 08:53:24	3588
Klamath Falls	08:39:07	-40.1	Dark	Down	43.6	106.3	Up	08:24:40 - 08:53:34	3556
Lakeview	08:38:57	-39.9	Dark	Down	44.6	107.5	Up	08:24:30 - 08:53:24	3535
Cedarville	08:38:59	-40.5	Dark	Down	44.9	107.0	Up	08:24:32 - 08:53:26	3467
Fall River/Burney	08:39:09	-41.2	Dark	Down	44.2	105.5	Up	08:24:42 - 08:53:36	3433
Susanville	08:39:08	-41.7	Dark	Down	44.9	105.6	Up	08:24:41 - 08:53:35	3360
Greenville	08:39:09	-42.0	Dark	Down	44.8	105.0	Up	08:24:42 - 08:53:36	3335
Gimple	08:39:08	-42.0	Dark	Down	44.8	105.1	Up	08:24:41 - 08:53:35	3334
Quincy	08:39:11	-42.2	Dark	Down	44.8	104.9	Up	08:24:44 - 08:53:38	3315
Portola	08:39:08	-42.2	Dark	Down	45.2	105.1	Up	08:24:41 - 08:53:35	3296
Reno	08:39:06	-42.4	Dark	Down	45.7	105.4	Up	08:24:39 - 08:53:33	3261
Carson City	08:39:06	-42.7	Dark	Down	45.9	105.1	Up	08:24:39 - 08:53:33	3224
Dunrhomin	08:37:20	-37.5	Dark	Down	55.5	120.5	Up	08:22:53 - 08:51:47	3213
Gardnerville	08:39:07	-43.0	Dark	Down	46.0	104.9	Up	08:24:40 - 08:53:34	3199
Yerington	08:39:03	-42.8	Dark	Down	46.4	105.4	Up	08:24:36 - 08:53:30	3197
Hawthorne	08:39:01	-43.1	Dark	Down	46.9	105.4	Up	08:24:34 - 08:53:28	3143
Lee Vining	08:39:06	-43.8	Dark	Down	46.7	104.4	Up	08:24:39 - 08:53:33	3090
Tonopah	08:38:53	-43.3	Dark	Down	48.1	106.1	Up	08:24:26 - 08:53:20	3079
Bishop	08:39:04	-44.2	Dark	Down	47.4	104.4	Up	08:24:37 - 08:53:31	3020
Beatty	08:38:53	-44.3	Dark	Down	48.7	105.2	Up	08:24:26 - 08:53:20	2953
Indian Springs	08:38:48	-44.3	Dark	Down	49.6	105.7	Up	08:24:21 - 08:53:15	2908
Henderson	08:38:45	-44.6	Dark	Down	50.3	105.7	Up	08:24:18 - 08:53:12	2845
CPSLO	08:39:25	-46.6	Dark	Down	46.1	100.5	Up	08:24:58 - 08:53:52	2831
Patrick	08:38:39	-44.9	Dark	Down	51.3	105.9	Up	08:24:12 - 08:53:06	2768
Laughlin/Bullhead City	08:38:43	-45.3	Dark	Down	50.8	105.0	Up	08:24:16 - 08:53:10	2749
Kingman/Dolan Springs	08:38:40	-45.1	Dark	Down	51.2	105.5	Up	08:24:13 - 08:53:07	2746
Mohave Valley	08:38:44	-45.5	Dark	Down	50.9	104.7	Up	08:24:17 - 08:53:11	2720
Wildwood	08:39:16	-47.4	Dark	Down	48.0	100.7	Up	08:24:49 - 08:53:43	2679
Lake Havasu City	08:38:44	-45.8	Dark	Down	51.2	104.4	Up	08:24:17 - 08:53:11	2675
Parker	08:38:45	-46.2	Dark	Down	51.3	104.0	Up	08:24:18 - 08:53:12	2637
Idyllwild	08:39:04	-47.2	Dark	Down	49.5	101.7	Up	08:24:37 - 08:53:31	2619
Blythe	08:38:49	-46.7	Dark	Down	51.2	103.1	Up	08:24:22 - 08:53:16	2584
George/Scottsdale	08:38:27	-45.7	Dark	Down	53.3	105.4	Up	08:24:00 - 08:52:54	2569
Calipatria	08:38:57	-47.5	Dark	Down	50.6	101.9	Up	08:24:30 - 08:53:24	2541
Yuma	08:38:51	-47.6	Dark	Down	51.4	102.0	Up	08:24:24 - 08:53:18	2486