RECON: TNO occultation with 202421

Event between (202421) 05UQ513 and star GA1260:00282142 with event index number of 2177444

Geocentric closest approach at 2026/11/09 08:05:13 UTC

J2000 position of star is 01:22:26.7 +37:03:44
Equinox of date position of star is 01:23:49.2 +37:11:14
Stellar brightness G=16.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 155 degrees from the moon. Moon is 0% illuminated.
Apparent brightness V=20.7

[RECON map]
Object is 47.3 AU from the Sun and 46.4 AU from the Earth.
Apparent velocity is 25.3 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 77 seconds.
The 1-sigma cross-track error in the shadow position is 1805 km.
The sky-plane scale is 33680.6 km/arcsec.

The object has an absolute magnitude Hv=3.9
Diameter=972.8 km assuming a 5% albedo -- 39.2 sec chord
Diameter=397.1 km assuming a 30% albedo -- 16.0 sec chord
Dynamical classification is SCATEXTD

Star training set for 202421, (2026/11/09 08:06UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:27.9 +16:33:41  0.8 47.19 155
57Gam1And      02:05:33.6 +42:27:26  2.3  9.55 157
47 And         01:25:13.4 +37:51:16  5.5  0.70 155
PPM 066248     01:25:56.0 +37:01:22  7.4  0.43 155
PPM 066220     01:24:34.6 +37:00:35  9.2  0.23 155
PPM 066216     01:24:27.6 +37:10:27 10.1  0.10 155
202421         01:23:58.9 +37:12:07 16.7       155
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 34.9 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)

Sleaford 08:02:57 -51.8 Dark Down 56.7 260.3 Up 07:56:04 - 08:09:50 -3829

Kamloops 08:03:32 -56.0 Dark Down 65.6 247.0 Up 07:56:39 - 08:10:25 -3858

Kelowna 08:03:30 -56.7 Dark Down 65.4 249.8 Up 07:56:37 - 08:10:23 -3960

Peachland 08:03:31 -56.9 Dark Down 65.6 249.7 Up 07:56:38 - 08:10:24 -3967

Summerland 08:03:31 -57.0 Dark Down 65.6 250.1 Up 07:56:38 - 08:10:24 -3985

Penticton 08:03:30 -57.1 Dark Down 65.6 250.4 Up 07:56:37 - 08:10:23 -3994

Oliver 08:03:31 -57.4 Dark Down 65.7 251.1 Up 07:56:38 - 08:10:24 -4032

Victoria 08:03:41 -58.3 Dark Down 68.3 247.6 Up 07:56:48 - 08:10:34 -4040

Anarchist Mountain Observatory 08:03:31 -57.6 Dark Down 65.6 251.7 Up 07:56:38 - 08:10:24 -4054

Okanogan 08:03:32 -58.2 Dark Down 66.0 252.8 Up 07:56:39 - 08:10:25 -4121

Brewster 08:03:33 -58.5 Dark Down 66.2 253.2 Up 07:56:40 - 08:10:26 -4147

Manson/Chelan 08:03:34 -58.8 Dark Down 66.5 253.2 Up 07:56:41 - 08:10:27 -4164

Wenatchee 08:03:34 -59.2 Dark Down 66.7 254.1 Up 07:56:41 - 08:10:27 -4213

Ellensburg 08:03:35 -59.7 Dark Down 67.0 254.7 Up 07:56:42 - 08:10:28 -4254

Yakima 08:03:36 -60.1 Dark Down 67.1 255.7 Up 07:56:43 - 08:10:29 -4298

Toppenish/White Swan 08:03:35 -60.3 Dark Down 67.0 256.3 Up 07:56:42 - 08:10:28 -4324

PNWRO 08:03:31 -60.5 Dark Down 66.1 258.8 Up 07:56:38 - 08:10:24 -4388

The Dalles 08:03:38 -61.1 Dark Down 67.7 257.3 Up 07:56:45 - 08:10:31 -4395

Maupin 08:03:38 -61.5 Dark Down 67.7 258.4 Up 07:56:45 - 08:10:31 -4443

Sisters 08:03:41 -62.4 Dark Down 68.2 260.1 Up 07:56:48 - 08:10:34 -4529

Bend 08:03:40 -62.7 Dark Down 68.1 260.9 Up 07:56:47 - 08:10:33 -4560

Oregon Observatory 08:03:40 -62.8 Dark Down 68.2 261.2 Up 07:56:47 - 08:10:33 -4576

Chiloquin 08:03:43 -64.2 Dark Down 68.7 264.1 Up 07:56:50 - 08:10:36 -4711

Klamath Falls 08:03:43 -64.5 Dark Down 68.6 265.1 Up 07:56:50 - 08:10:36 -4749

Cedarville 08:03:39 -65.0 Dark Down 67.5 268.0 Up 07:56:46 - 08:10:32 -4854

Fall River/Burney 08:03:43 -65.7 Dark Down 68.4 268.4 Up 07:56:50 - 08:10:36 -4884

Greenville 08:03:42 -66.5 Dark Down 68.1 270.9 Up 07:56:49 - 08:10:35 -4990

Gimple 08:03:42 -66.5 Dark Down 68.0 271.0 Up 07:56:49 - 08:10:35 -4992

Quincy 08:03:43 -66.7 Dark Down 68.1 271.4 Up 07:56:50 - 08:10:36 -5012

Portola 08:03:41 -66.8 Dark Down 67.7 272.0 Up 07:56:48 - 08:10:34 -5034

Reno 08:03:40 -66.9 Dark Down 67.2 273.0 Up 07:56:47 - 08:10:33 -5075

Carson City 08:03:40 -67.3 Dark Down 67.2 273.9 Up 07:56:47 - 08:10:33 -5114

Gardnerville 08:03:40 -67.5 Dark Down 67.1 274.5 Up 07:56:47 - 08:10:33 -5141

Dunrhomin 08:02:57 -61.1 Dark Down 56.2 278.9 Up 07:56:04 - 08:09:50 -5143

Yerington 08:03:39 -67.3 Dark Down 66.7 274.6 Up 07:56:46 - 08:10:32 -5146

Nikitin 08:02:57 -61.3 Dark Down 56.2 279.1 Up 07:56:04 - 08:09:50 -5163

CU-SBO 08:02:57 -61.4 Dark Down 56.3 279.2 Up 07:56:04 - 08:09:50 -5170

Hawthorne 08:03:37 -67.7 Dark Down 66.2 275.9 Up 07:56:44 - 08:10:30 -5205

Lee Vining 08:03:40 -68.3 Dark Down 66.5 277.0 Up 07:56:47 - 08:10:33 -5258

Bishop 08:03:38 -68.7 Dark Down 65.9 278.6 Up 07:56:45 - 08:10:31 -5335

Beatty 08:03:33 -68.7 Dark Down 64.5 280.1 Up 07:56:40 - 08:10:26 -5410

Patrick 08:03:26 -69.0 Dark Down 62.0 283.8 Up 07:56:33 - 08:10:19 -5610

Laughlin/Bullhead City 08:03:28 -69.5 Dark Down 62.5 284.1 Up 07:56:35 - 08:10:21 -5628

Wildwood 08:03:42 -71.9 Dark Down 65.3 285.7 Up 07:56:49 - 08:10:35 -5682

Lake Havasu City 08:03:28 -70.0 Dark Down 62.1 285.4 Up 07:56:35 - 08:10:21 -5703

Idyllwild 08:03:36 -71.6 Dark Down 63.8 286.5 Up 07:56:43 - 08:10:29 -5751

George/Scottsdale 08:03:21 -69.5 Dark Down 59.9 287.1 Up 07:56:28 - 08:10:14 -5815

Calipatria 08:03:33 -71.7 Dark Down 62.6 287.8 Up 07:56:40 - 08:10:26 -5834

Yuma 08:03:30 -71.7 Dark Down 61.8 288.6 Up 07:56:37 - 08:10:23 -5892

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 202421, (2026/11/09 08:06UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 47.19 155
57Gam1And      02:03:54.0 +42:19:46  2.3  9.55 157
47 And         01:23:40.8 +37:42:54  5.5  0.70 155
PPM 066248     01:24:23.6 +36:53:00  7.4  0.43 155
PPM 066220     01:23:02.4 +36:52:12  9.2  0.23 155
PPM 066216     01:22:55.3 +37:02:05 10.1  0.10 155
202421         01:22:26.7 +37:03:44 16.7       155
Positions are for J2000

Event circumstances last updated at 2024/01/09 04:31:07 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	08:02:57	-51.8	Dark	Down	56.7	260.3	Up	07:56:04 - 08:09:50	-3829
Kamloops	08:03:32	-56.0	Dark	Down	65.6	247.0	Up	07:56:39 - 08:10:25	-3858
Kelowna	08:03:30	-56.7	Dark	Down	65.4	249.8	Up	07:56:37 - 08:10:23	-3960
Peachland	08:03:31	-56.9	Dark	Down	65.6	249.7	Up	07:56:38 - 08:10:24	-3967
Summerland	08:03:31	-57.0	Dark	Down	65.6	250.1	Up	07:56:38 - 08:10:24	-3985
Penticton	08:03:30	-57.1	Dark	Down	65.6	250.4	Up	07:56:37 - 08:10:23	-3994
Oliver	08:03:31	-57.4	Dark	Down	65.7	251.1	Up	07:56:38 - 08:10:24	-4032
Victoria	08:03:41	-58.3	Dark	Down	68.3	247.6	Up	07:56:48 - 08:10:34	-4040
Anarchist Mountain Observatory	08:03:31	-57.6	Dark	Down	65.6	251.7	Up	07:56:38 - 08:10:24	-4054
Okanogan	08:03:32	-58.2	Dark	Down	66.0	252.8	Up	07:56:39 - 08:10:25	-4121
Brewster	08:03:33	-58.5	Dark	Down	66.2	253.2	Up	07:56:40 - 08:10:26	-4147
Manson/Chelan	08:03:34	-58.8	Dark	Down	66.5	253.2	Up	07:56:41 - 08:10:27	-4164
Wenatchee	08:03:34	-59.2	Dark	Down	66.7	254.1	Up	07:56:41 - 08:10:27	-4213
Ellensburg	08:03:35	-59.7	Dark	Down	67.0	254.7	Up	07:56:42 - 08:10:28	-4254
Yakima	08:03:36	-60.1	Dark	Down	67.1	255.7	Up	07:56:43 - 08:10:29	-4298
Toppenish/White Swan	08:03:35	-60.3	Dark	Down	67.0	256.3	Up	07:56:42 - 08:10:28	-4324
PNWRO	08:03:31	-60.5	Dark	Down	66.1	258.8	Up	07:56:38 - 08:10:24	-4388
The Dalles	08:03:38	-61.1	Dark	Down	67.7	257.3	Up	07:56:45 - 08:10:31	-4395
Maupin	08:03:38	-61.5	Dark	Down	67.7	258.4	Up	07:56:45 - 08:10:31	-4443
Sisters	08:03:41	-62.4	Dark	Down	68.2	260.1	Up	07:56:48 - 08:10:34	-4529
Bend	08:03:40	-62.7	Dark	Down	68.1	260.9	Up	07:56:47 - 08:10:33	-4560
Oregon Observatory	08:03:40	-62.8	Dark	Down	68.2	261.2	Up	07:56:47 - 08:10:33	-4576
Chiloquin	08:03:43	-64.2	Dark	Down	68.7	264.1	Up	07:56:50 - 08:10:36	-4711
Klamath Falls	08:03:43	-64.5	Dark	Down	68.6	265.1	Up	07:56:50 - 08:10:36	-4749
Cedarville	08:03:39	-65.0	Dark	Down	67.5	268.0	Up	07:56:46 - 08:10:32	-4854
Fall River/Burney	08:03:43	-65.7	Dark	Down	68.4	268.4	Up	07:56:50 - 08:10:36	-4884
Greenville	08:03:42	-66.5	Dark	Down	68.1	270.9	Up	07:56:49 - 08:10:35	-4990
Gimple	08:03:42	-66.5	Dark	Down	68.0	271.0	Up	07:56:49 - 08:10:35	-4992
Quincy	08:03:43	-66.7	Dark	Down	68.1	271.4	Up	07:56:50 - 08:10:36	-5012
Portola	08:03:41	-66.8	Dark	Down	67.7	272.0	Up	07:56:48 - 08:10:34	-5034
Reno	08:03:40	-66.9	Dark	Down	67.2	273.0	Up	07:56:47 - 08:10:33	-5075
Carson City	08:03:40	-67.3	Dark	Down	67.2	273.9	Up	07:56:47 - 08:10:33	-5114
Gardnerville	08:03:40	-67.5	Dark	Down	67.1	274.5	Up	07:56:47 - 08:10:33	-5141
Dunrhomin	08:02:57	-61.1	Dark	Down	56.2	278.9	Up	07:56:04 - 08:09:50	-5143
Yerington	08:03:39	-67.3	Dark	Down	66.7	274.6	Up	07:56:46 - 08:10:32	-5146
Nikitin	08:02:57	-61.3	Dark	Down	56.2	279.1	Up	07:56:04 - 08:09:50	-5163
CU-SBO	08:02:57	-61.4	Dark	Down	56.3	279.2	Up	07:56:04 - 08:09:50	-5170
Hawthorne	08:03:37	-67.7	Dark	Down	66.2	275.9	Up	07:56:44 - 08:10:30	-5205
Lee Vining	08:03:40	-68.3	Dark	Down	66.5	277.0	Up	07:56:47 - 08:10:33	-5258
Bishop	08:03:38	-68.7	Dark	Down	65.9	278.6	Up	07:56:45 - 08:10:31	-5335
Beatty	08:03:33	-68.7	Dark	Down	64.5	280.1	Up	07:56:40 - 08:10:26	-5410
Patrick	08:03:26	-69.0	Dark	Down	62.0	283.8	Up	07:56:33 - 08:10:19	-5610
Laughlin/Bullhead City	08:03:28	-69.5	Dark	Down	62.5	284.1	Up	07:56:35 - 08:10:21	-5628
Wildwood	08:03:42	-71.9	Dark	Down	65.3	285.7	Up	07:56:49 - 08:10:35	-5682
Lake Havasu City	08:03:28	-70.0	Dark	Down	62.1	285.4	Up	07:56:35 - 08:10:21	-5703
Idyllwild	08:03:36	-71.6	Dark	Down	63.8	286.5	Up	07:56:43 - 08:10:29	-5751
George/Scottsdale	08:03:21	-69.5	Dark	Down	59.9	287.1	Up	07:56:28 - 08:10:14	-5815
Calipatria	08:03:33	-71.7	Dark	Down	62.6	287.8	Up	07:56:40 - 08:10:26	-5834
Yuma	08:03:30	-71.7	Dark	Down	61.8	288.6	Up	07:56:37 - 08:10:23	-5892