RECON: TNO occultation with 24952

Event between (24952) 97QJ4 and star GA1240:00731857 with event index number of 1558222

Geocentric closest approach at 2026/09/01 08:49:39 UTC

J2000 position of star is 03:30:13.9 +35:12:37
Equinox of date position of star is 03:31:45.0 +35:17:26
Stellar brightness G=16.3, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 30 degrees from the moon. Moon is 81% illuminated.
Apparent brightness V=22.6

[RECON map]
Object is 30.6 AU from the Sun and 30.4 AU from the Earth.
Apparent velocity is 8.4 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 213 seconds.
The 1-sigma cross-track error in the shadow position is 3818 km.
The sky-plane scale is 22041.4 km/arcsec.

The object has an absolute magnitude Hv=7.6
Diameter=183.7 km assuming a 5% albedo -- 22.1 sec chord
Diameter=75.0 km assuming a 30% albedo -- 9.0 sec chord
Dynamical classification is 3:2E

Star training set for 24952, (2026/09/01 08:50UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:27.2 +16:33:39  0.8 23.76  41
44Zet Per      03:55:48.9 +31:57:38  2.8  5.99  33
PPM 068561     03:34:22.4 +35:33:01  5.9  0.56  31
PPM 068499     03:30:31.5 +35:53:49  8.0  0.66  30
PPM 068484     03:29:55.1 +35:22:47  9.4  0.42  30
PPM 068528     03:32:45.2 +35:11:10 10.8  0.20  30
24952          03:31:56.0 +35:18:01 16.3        30
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 4.2 sigma about the mid-time.
The median site spacing is 13.7 km RECON observability=1.0 and success probability=4.6%

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

Sleaford 08:55:45 -25.1 Dark Up 54.7 100.9 Up 08:40:45 - 09:10:45 -6926

Kamloops 08:56:32 -29.9 Dark Up 45.9 87.3 Up 08:41:32 - 09:11:32 -7567

Kelowna 08:56:23 -30.5 Dark Up 46.4 87.1 Up 08:41:23 - 09:11:23 -7611

Peachland 08:56:23 -30.7 Dark Up 46.2 86.7 Up 08:41:23 - 09:11:23 -7630

Summerland 08:56:20 -30.8 Dark Up 46.3 86.7 Up 08:41:20 - 09:11:20 -7640

Penticton 08:56:19 -30.9 Dark Up 46.4 86.7 Up 08:41:19 - 09:11:19 -7642

Oliver 08:56:18 -31.2 Dark Up 46.3 86.3 Up 08:41:18 - 09:11:18 -7673

Anarchist Mountain Observatory 08:56:14 -31.3 Dark Up 46.4 86.2 Up 08:41:14 - 09:11:14 -7682

Okanogan 08:56:11 -32.0 Dark Up 46.2 85.4 Up 08:41:11 - 09:11:11 -7744

Dunrhomin 08:53:49 -35.0 Dark Up 55.4 84.1 Up 08:38:49 - 09:08:49 -7767

Brewster 08:56:09 -32.3 Dark Up 46.1 85.0 Up 08:41:09 - 09:11:09 -7773

Nikitin 08:53:48 -35.1 Dark Up 55.4 83.8 Up 08:38:48 - 09:08:48 -7781

CU-SBO 08:53:48 -35.2 Dark Up 55.3 83.7 Up 08:38:48 - 09:08:48 -7789

Manson/Chelan 08:56:08 -32.6 Dark Up 45.8 84.5 Up 08:41:08 - 09:11:08 -7803

Victoria 08:56:29 -32.5 Dark Up 43.8 83.0 Up 08:41:29 - 09:11:29 -7843

Wenatchee 08:56:07 -33.1 Dark Up 45.6 83.9 Up 08:41:07 - 09:11:07 -7849

Ellensburg 08:56:03 -33.5 Dark Up 45.4 83.3 Up 08:41:03 - 09:11:03 -7891

PNWRO 08:55:48 -34.1 Dark Up 46.4 83.3 Up 08:40:48 - 09:10:48 -7921

Yakima 08:55:59 -33.9 Dark Up 45.4 82.9 Up 08:40:59 - 09:10:59 -7926

Toppenish/White Swan 08:55:59 -34.1 Dark Up 45.4 82.8 Up 08:40:59 - 09:10:59 -7939

The Dalles 08:55:56 -35.0 Dark Up 44.8 81.5 Up 08:40:56 - 09:10:56 -8029

Maupin 08:55:52 -35.4 Dark Up 44.8 81.2 Up 08:40:52 - 09:10:52 -8061

Sisters 08:55:48 -36.3 Dark Up 44.3 80.0 Up 08:40:48 - 09:10:48 -8150

Bend 08:55:43 -36.5 Dark Up 44.4 79.9 Up 08:40:43 - 09:10:43 -8162

Oregon Observatory 08:55:41 -36.7 Dark Up 44.3 79.7 Up 08:40:41 - 09:10:41 -8180

Chiloquin 08:55:34 -38.0 Dark Up 43.7 78.2 Up 08:40:34 - 09:10:34 -8301

Klamath Falls 08:55:31 -38.4 Dark Up 43.7 77.9 Up 08:40:31 - 09:10:31 -8326

Cedarville 08:55:18 -38.7 Dark Up 44.7 78.0 Up 08:40:18 - 09:10:18 -8329

Fall River/Burney 08:55:19 -39.4 Dark Up 43.7 77.0 Up 08:40:19 - 09:10:19 -8408

Gimple 08:55:09 -40.2 Dark Up 43.8 76.3 Up 08:40:09 - 09:10:09 -8462

Greenville 08:55:10 -40.2 Dark Up 43.8 76.3 Up 08:40:10 - 09:10:10 -8465

Reno 08:54:58 -40.5 Dark Up 44.4 76.3 Up 08:39:58 - 09:09:58 -8471

Portola 08:55:02 -40.4 Dark Up 44.0 76.2 Up 08:40:02 - 09:10:02 -8474

Quincy 08:55:06 -40.4 Dark Up 43.7 76.1 Up 08:40:06 - 09:10:06 -8480

Yerington 08:54:49 -40.9 Dark Up 44.8 76.0 Up 08:39:49 - 09:09:49 -8490

Carson City 08:54:55 -40.9 Dark Up 44.4 75.9 Up 08:39:55 - 09:09:55 -8498

Hawthorne 08:54:43 -41.2 Dark Up 45.0 75.8 Up 08:39:43 - 09:09:43 -8505

Gardnerville 08:54:54 -41.1 Dark Up 44.3 75.7 Up 08:39:54 - 09:09:54 -8515

Patrick 08:53:49 -42.6 Dark Up 47.7 74.4 Up 08:38:49 - 09:08:49 -8532

Beatty 08:54:18 -42.2 Dark Up 46.0 74.9 Up 08:39:18 - 09:09:18 -8551

George/Scottsdale 08:53:22 -43.4 Dark Up 48.8 73.1 Up 08:38:22 - 09:08:22 -8553

Lee Vining 08:54:40 -41.9 Dark Up 44.5 75.0 Up 08:39:40 - 09:09:40 -8566

Laughlin/Bullhead City 08:53:49 -43.1 Dark Up 47.1 73.9 Up 08:38:49 - 09:08:49 -8581

Bishop 08:54:30 -42.3 Dark Up 44.9 74.7 Up 08:39:30 - 09:09:30 -8583

Lake Havasu City 08:53:42 -43.6 Dark Up 47.1 73.2 Up 08:38:42 - 09:08:42 -8616

Yuma 08:53:28 -45.4 Dark Up 46.3 71.3 Up 08:38:28 - 09:08:28 -8752

Calipatria 08:53:35 -45.3 Dark Up 45.7 71.5 Up 08:38:35 - 09:08:35 -8763

Idyllwild 08:53:47 -45.1 Dark Up 45.0 71.8 Up 08:38:47 - 09:08:47 -8774

Wildwood 08:54:02 -45.4 Dark Up 43.7 71.6 Up 08:39:02 - 09:09:02 -8826

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 24952, (2026/09/01 08:50UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 23.76  41
44Zet Per      03:54:07.9 +31:53:01  2.8  5.99  33
PPM 068561     03:32:40.0 +35:27:42  5.9  0.56  31
PPM 068499     03:28:49.1 +35:48:23  8.0  0.66  30
PPM 068484     03:28:13.1 +35:17:20  9.4  0.42  30
PPM 068528     03:31:03.2 +35:05:48 10.8  0.20  30
24952          03:30:13.9 +35:12:37 16.3        30
Positions are for J2000

Event circumstances last updated at 2023/10/25 01:50:13 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)
Sleaford	08:55:45	-25.1	Dark	Up	54.7	100.9	Up	08:40:45 - 09:10:45	-6926
Kamloops	08:56:32	-29.9	Dark	Up	45.9	87.3	Up	08:41:32 - 09:11:32	-7567
Kelowna	08:56:23	-30.5	Dark	Up	46.4	87.1	Up	08:41:23 - 09:11:23	-7611
Peachland	08:56:23	-30.7	Dark	Up	46.2	86.7	Up	08:41:23 - 09:11:23	-7630
Summerland	08:56:20	-30.8	Dark	Up	46.3	86.7	Up	08:41:20 - 09:11:20	-7640
Penticton	08:56:19	-30.9	Dark	Up	46.4	86.7	Up	08:41:19 - 09:11:19	-7642
Oliver	08:56:18	-31.2	Dark	Up	46.3	86.3	Up	08:41:18 - 09:11:18	-7673
Anarchist Mountain Observatory	08:56:14	-31.3	Dark	Up	46.4	86.2	Up	08:41:14 - 09:11:14	-7682
Okanogan	08:56:11	-32.0	Dark	Up	46.2	85.4	Up	08:41:11 - 09:11:11	-7744
Dunrhomin	08:53:49	-35.0	Dark	Up	55.4	84.1	Up	08:38:49 - 09:08:49	-7767
Brewster	08:56:09	-32.3	Dark	Up	46.1	85.0	Up	08:41:09 - 09:11:09	-7773
Nikitin	08:53:48	-35.1	Dark	Up	55.4	83.8	Up	08:38:48 - 09:08:48	-7781
CU-SBO	08:53:48	-35.2	Dark	Up	55.3	83.7	Up	08:38:48 - 09:08:48	-7789
Manson/Chelan	08:56:08	-32.6	Dark	Up	45.8	84.5	Up	08:41:08 - 09:11:08	-7803
Victoria	08:56:29	-32.5	Dark	Up	43.8	83.0	Up	08:41:29 - 09:11:29	-7843
Wenatchee	08:56:07	-33.1	Dark	Up	45.6	83.9	Up	08:41:07 - 09:11:07	-7849
Ellensburg	08:56:03	-33.5	Dark	Up	45.4	83.3	Up	08:41:03 - 09:11:03	-7891
PNWRO	08:55:48	-34.1	Dark	Up	46.4	83.3	Up	08:40:48 - 09:10:48	-7921
Yakima	08:55:59	-33.9	Dark	Up	45.4	82.9	Up	08:40:59 - 09:10:59	-7926
Toppenish/White Swan	08:55:59	-34.1	Dark	Up	45.4	82.8	Up	08:40:59 - 09:10:59	-7939
The Dalles	08:55:56	-35.0	Dark	Up	44.8	81.5	Up	08:40:56 - 09:10:56	-8029
Maupin	08:55:52	-35.4	Dark	Up	44.8	81.2	Up	08:40:52 - 09:10:52	-8061
Sisters	08:55:48	-36.3	Dark	Up	44.3	80.0	Up	08:40:48 - 09:10:48	-8150
Bend	08:55:43	-36.5	Dark	Up	44.4	79.9	Up	08:40:43 - 09:10:43	-8162
Oregon Observatory	08:55:41	-36.7	Dark	Up	44.3	79.7	Up	08:40:41 - 09:10:41	-8180
Chiloquin	08:55:34	-38.0	Dark	Up	43.7	78.2	Up	08:40:34 - 09:10:34	-8301
Klamath Falls	08:55:31	-38.4	Dark	Up	43.7	77.9	Up	08:40:31 - 09:10:31	-8326
Cedarville	08:55:18	-38.7	Dark	Up	44.7	78.0	Up	08:40:18 - 09:10:18	-8329
Fall River/Burney	08:55:19	-39.4	Dark	Up	43.7	77.0	Up	08:40:19 - 09:10:19	-8408
Gimple	08:55:09	-40.2	Dark	Up	43.8	76.3	Up	08:40:09 - 09:10:09	-8462
Greenville	08:55:10	-40.2	Dark	Up	43.8	76.3	Up	08:40:10 - 09:10:10	-8465
Reno	08:54:58	-40.5	Dark	Up	44.4	76.3	Up	08:39:58 - 09:09:58	-8471
Portola	08:55:02	-40.4	Dark	Up	44.0	76.2	Up	08:40:02 - 09:10:02	-8474
Quincy	08:55:06	-40.4	Dark	Up	43.7	76.1	Up	08:40:06 - 09:10:06	-8480
Yerington	08:54:49	-40.9	Dark	Up	44.8	76.0	Up	08:39:49 - 09:09:49	-8490
Carson City	08:54:55	-40.9	Dark	Up	44.4	75.9	Up	08:39:55 - 09:09:55	-8498
Hawthorne	08:54:43	-41.2	Dark	Up	45.0	75.8	Up	08:39:43 - 09:09:43	-8505
Gardnerville	08:54:54	-41.1	Dark	Up	44.3	75.7	Up	08:39:54 - 09:09:54	-8515
Patrick	08:53:49	-42.6	Dark	Up	47.7	74.4	Up	08:38:49 - 09:08:49	-8532
Beatty	08:54:18	-42.2	Dark	Up	46.0	74.9	Up	08:39:18 - 09:09:18	-8551
George/Scottsdale	08:53:22	-43.4	Dark	Up	48.8	73.1	Up	08:38:22 - 09:08:22	-8553
Lee Vining	08:54:40	-41.9	Dark	Up	44.5	75.0	Up	08:39:40 - 09:09:40	-8566
Laughlin/Bullhead City	08:53:49	-43.1	Dark	Up	47.1	73.9	Up	08:38:49 - 09:08:49	-8581
Bishop	08:54:30	-42.3	Dark	Up	44.9	74.7	Up	08:39:30 - 09:09:30	-8583
Lake Havasu City	08:53:42	-43.6	Dark	Up	47.1	73.2	Up	08:38:42 - 09:08:42	-8616
Yuma	08:53:28	-45.4	Dark	Up	46.3	71.3	Up	08:38:28 - 09:08:28	-8752
Calipatria	08:53:35	-45.3	Dark	Up	45.7	71.5	Up	08:38:35 - 09:08:35	-8763
Idyllwild	08:53:47	-45.1	Dark	Up	45.0	71.8	Up	08:38:47 - 09:08:47	-8774
Wildwood	08:54:02	-45.4	Dark	Up	43.7	71.6	Up	08:39:02 - 09:09:02	-8826