RECON: TNO occultation with 248835

Event between (248835) 06SX368 and star GA1120:02353355 with event index number of 2298840

Geocentric closest approach at 2025/12/26 08:31:05 UTC

J2000 position of star is 06:40:19.3 +23:55:13
Equinox of date position of star is 06:41:48.8 +23:53:46
Stellar brightness G=15.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 112 degrees from the moon. Moon is 35% illuminated.
Apparent brightness V=22.4

[RECON map]
Object is 20.3 AU from the Sun and 19.4 AU from the Earth.
Apparent velocity is 25.5 km/sec on the sky relative to the star, or, 6.5 arcsec/hr.
The 1-sigma error in the time of the event is 270 seconds.
The 1-sigma cross-track error in the shadow position is 5825 km.
The sky-plane scale is 14036.1 km/arcsec.

The object has an absolute magnitude Hv=9.4
Diameter=75.9 km assuming a 5% albedo -- 3.1 sec chord
Diameter=31.0 km assuming a 30% albedo -- 1.3 sec chord
Dynamical classification is CENTAURR

Star training set for 248835, (2025/12/26 08:31UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:54.3 +27:57:41  1.1 15.16 126
Alhena         06:39:12.8 +16:22:30  1.9  7.55 112
PPM 096264     06:39:02.8 +24:34:01  6.5  0.94 112
PPM 096281     06:39:27.3 +23:34:49  7.7  0.64 112
PPM 096343     06:41:46.4 +23:48:52  9.8  0.09 112
248835         06:41:54.4 +23:53:40 15.6       113
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 3.3 sigma about the mid-time.
The median site spacing is 35.4 km RECON observability=1.0 and success probability=9.0%

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

Sleaford 08:30:14 -56.9 Dark Down 59.1 210.7 Up 08:15:14 - 08:45:14 4805

Kamloops 08:30:52 -62.1 Dark Down 63.2 184.8 Up 08:15:52 - 08:45:52 4670

Kelowna 08:30:50 -62.7 Dark Down 63.9 186.8 Up 08:15:50 - 08:45:50 4586

Peachland 08:30:50 -62.9 Dark Down 64.1 186.2 Up 08:15:50 - 08:45:50 4576

Summerland 08:30:50 -63.0 Dark Down 64.2 186.4 Up 08:15:50 - 08:45:50 4560

Penticton 08:30:50 -63.1 Dark Down 64.3 186.7 Up 08:15:50 - 08:45:50 4553

Oliver 08:30:50 -63.4 Dark Down 64.6 186.8 Up 08:15:50 - 08:45:50 4518

Anarchist Mountain Observatory 08:30:49 -63.5 Dark Down 64.8 187.2 Up 08:15:49 - 08:45:49 4500

Victoria 08:31:01 -64.6 Dark Down 65.4 178.6 Up 08:16:01 - 08:46:01 4469

Okanogan 08:30:50 -64.2 Dark Down 65.4 186.9 Up 08:15:50 - 08:45:50 4436

Brewster 08:30:51 -64.5 Dark Down 65.7 186.5 Up 08:15:51 - 08:45:51 4409

Manson/Chelan 08:30:52 -64.8 Dark Down 65.9 185.8 Up 08:15:52 - 08:45:52 4389

Wenatchee 08:30:53 -65.3 Dark Down 66.4 185.5 Up 08:15:53 - 08:45:53 4341

Ellensburg 08:30:53 -65.7 Dark Down 66.9 185.1 Up 08:15:53 - 08:45:53 4300

Yakima 08:30:53 -66.1 Dark Down 67.3 185.1 Up 08:15:53 - 08:45:53 4259

Toppenish/White Swan 08:30:53 -66.3 Dark Down 67.5 185.6 Up 08:15:53 - 08:45:53 4236

PNWRO 08:30:48 -66.3 Dark Down 67.7 189.2 Up 08:15:48 - 08:45:48 4192

The Dalles 08:30:56 -67.2 Dark Down 68.3 183.9 Up 08:15:56 - 08:45:56 4159

Maupin 08:30:55 -67.5 Dark Down 68.7 184.2 Up 08:15:55 - 08:45:55 4116

Sisters 08:30:57 -68.5 Dark Down 69.6 183.1 Up 08:15:57 - 08:45:57 4027

Bend 08:30:56 -68.7 Dark Down 69.8 183.8 Up 08:15:56 - 08:45:56 4001

Oregon Observatory 08:30:56 -68.9 Dark Down 70.0 183.5 Up 08:15:56 - 08:45:56 3983

Chiloquin 08:30:58 -70.2 Dark Down 71.3 182.6 Up 08:15:58 - 08:45:58 3848

Klamath Falls 08:30:58 -70.5 Dark Down 71.7 182.8 Up 08:15:58 - 08:45:58 3811

Cedarville 08:30:53 -70.8 Dark Down 72.3 187.7 Up 08:15:53 - 08:45:53 3730

Fall River/Burney 08:30:57 -71.6 Dark Down 72.8 184.2 Up 08:15:57 - 08:45:57 3685

Dunrhomin 08:30:05 -64.8 Dark Down 68.1 227.0 Up 08:15:05 - 08:45:05 3594

Greenville 08:30:56 -72.3 Dark Down 73.7 185.9 Up 08:15:56 - 08:45:56 3586

Gimple 08:30:56 -72.3 Dark Down 73.7 186.1 Up 08:15:56 - 08:45:56 3585

Nikitin 08:30:05 -64.9 Dark Down 68.2 227.3 Up 08:15:05 - 08:45:05 3574

CU-SBO 08:30:05 -65.0 Dark Down 68.3 227.3 Up 08:15:05 - 08:45:05 3567

Quincy 08:30:56 -72.5 Dark Down 73.9 186.0 Up 08:15:56 - 08:45:56 3564

Portola 08:30:54 -72.5 Dark Down 74.0 187.6 Up 08:15:54 - 08:45:54 3549

Reno 08:30:52 -72.5 Dark Down 74.2 189.8 Up 08:15:52 - 08:45:52 3517

Carson City 08:30:52 -72.8 Dark Down 74.5 190.1 Up 08:15:52 - 08:45:52 3479

Yerington 08:30:50 -72.8 Dark Down 74.6 192.4 Up 08:15:50 - 08:45:50 3455

Gardnerville 08:30:52 -73.1 Dark Down 74.8 190.4 Up 08:15:52 - 08:45:52 3453

Hawthorne 08:30:49 -73.0 Dark Down 75.0 194.6 Up 08:15:49 - 08:45:49 3404

Lee Vining 08:30:50 -73.7 Dark Down 75.6 193.4 Up 08:15:50 - 08:45:50 3345

Bishop 08:30:48 -73.9 Dark Down 76.1 196.6 Up 08:15:48 - 08:45:48 3277

Beatty 08:30:42 -73.6 Dark Down 76.1 203.1 Up 08:15:42 - 08:45:42 3222

Patrick 08:30:32 -73.1 Dark Down 76.2 215.9 Up 08:15:32 - 08:45:32 3056

Laughlin/Bullhead City 08:30:34 -73.7 Dark Down 76.7 214.1 Up 08:15:34 - 08:45:34 3030

Lake Havasu City 08:30:34 -74.0 Dark Down 77.2 216.7 Up 08:15:34 - 08:45:34 2956

Wildwood 08:30:49 -76.7 Dark Down 79.2 200.5 Up 08:15:49 - 08:45:49 2923

Idyllwild 08:30:42 -75.9 Dark Down 78.9 209.6 Up 08:15:42 - 08:45:42 2878

George/Scottsdale 08:30:25 -72.9 Dark Down 76.4 226.7 Up 08:15:25 - 08:45:25 2870

Calipatria 08:30:38 -75.6 Dark Down 78.9 216.1 Up 08:15:38 - 08:45:38 2808

Yuma 08:30:34 -75.3 Dark Down 78.7 220.9 Up 08:15:34 - 08:45:34 2759

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 248835, (2025/12/26 08:31UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 15.16 126
Alhena         06:37:42.8 +16:23:57  1.9  7.55 112
PPM 096264     06:37:27.2 +24:35:27  6.5  0.94 112
PPM 096281     06:37:52.4 +23:36:17  7.7  0.64 112
PPM 096343     06:40:11.5 +23:50:24  9.8  0.09 112
248835         06:40:19.3 +23:55:13 15.6       112
Positions are for J2000

Event circumstances last updated at 2024/06/18 21:23:41 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	08:30:14	-56.9	Dark	Down	59.1	210.7	Up	08:15:14 - 08:45:14	4805
Kamloops	08:30:52	-62.1	Dark	Down	63.2	184.8	Up	08:15:52 - 08:45:52	4670
Kelowna	08:30:50	-62.7	Dark	Down	63.9	186.8	Up	08:15:50 - 08:45:50	4586
Peachland	08:30:50	-62.9	Dark	Down	64.1	186.2	Up	08:15:50 - 08:45:50	4576
Summerland	08:30:50	-63.0	Dark	Down	64.2	186.4	Up	08:15:50 - 08:45:50	4560
Penticton	08:30:50	-63.1	Dark	Down	64.3	186.7	Up	08:15:50 - 08:45:50	4553
Oliver	08:30:50	-63.4	Dark	Down	64.6	186.8	Up	08:15:50 - 08:45:50	4518
Anarchist Mountain Observatory	08:30:49	-63.5	Dark	Down	64.8	187.2	Up	08:15:49 - 08:45:49	4500
Victoria	08:31:01	-64.6	Dark	Down	65.4	178.6	Up	08:16:01 - 08:46:01	4469
Okanogan	08:30:50	-64.2	Dark	Down	65.4	186.9	Up	08:15:50 - 08:45:50	4436
Brewster	08:30:51	-64.5	Dark	Down	65.7	186.5	Up	08:15:51 - 08:45:51	4409
Manson/Chelan	08:30:52	-64.8	Dark	Down	65.9	185.8	Up	08:15:52 - 08:45:52	4389
Wenatchee	08:30:53	-65.3	Dark	Down	66.4	185.5	Up	08:15:53 - 08:45:53	4341
Ellensburg	08:30:53	-65.7	Dark	Down	66.9	185.1	Up	08:15:53 - 08:45:53	4300
Yakima	08:30:53	-66.1	Dark	Down	67.3	185.1	Up	08:15:53 - 08:45:53	4259
Toppenish/White Swan	08:30:53	-66.3	Dark	Down	67.5	185.6	Up	08:15:53 - 08:45:53	4236
PNWRO	08:30:48	-66.3	Dark	Down	67.7	189.2	Up	08:15:48 - 08:45:48	4192
The Dalles	08:30:56	-67.2	Dark	Down	68.3	183.9	Up	08:15:56 - 08:45:56	4159
Maupin	08:30:55	-67.5	Dark	Down	68.7	184.2	Up	08:15:55 - 08:45:55	4116
Sisters	08:30:57	-68.5	Dark	Down	69.6	183.1	Up	08:15:57 - 08:45:57	4027
Bend	08:30:56	-68.7	Dark	Down	69.8	183.8	Up	08:15:56 - 08:45:56	4001
Oregon Observatory	08:30:56	-68.9	Dark	Down	70.0	183.5	Up	08:15:56 - 08:45:56	3983
Chiloquin	08:30:58	-70.2	Dark	Down	71.3	182.6	Up	08:15:58 - 08:45:58	3848
Klamath Falls	08:30:58	-70.5	Dark	Down	71.7	182.8	Up	08:15:58 - 08:45:58	3811
Cedarville	08:30:53	-70.8	Dark	Down	72.3	187.7	Up	08:15:53 - 08:45:53	3730
Fall River/Burney	08:30:57	-71.6	Dark	Down	72.8	184.2	Up	08:15:57 - 08:45:57	3685
Dunrhomin	08:30:05	-64.8	Dark	Down	68.1	227.0	Up	08:15:05 - 08:45:05	3594
Greenville	08:30:56	-72.3	Dark	Down	73.7	185.9	Up	08:15:56 - 08:45:56	3586
Gimple	08:30:56	-72.3	Dark	Down	73.7	186.1	Up	08:15:56 - 08:45:56	3585
Nikitin	08:30:05	-64.9	Dark	Down	68.2	227.3	Up	08:15:05 - 08:45:05	3574
CU-SBO	08:30:05	-65.0	Dark	Down	68.3	227.3	Up	08:15:05 - 08:45:05	3567
Quincy	08:30:56	-72.5	Dark	Down	73.9	186.0	Up	08:15:56 - 08:45:56	3564
Portola	08:30:54	-72.5	Dark	Down	74.0	187.6	Up	08:15:54 - 08:45:54	3549
Reno	08:30:52	-72.5	Dark	Down	74.2	189.8	Up	08:15:52 - 08:45:52	3517
Carson City	08:30:52	-72.8	Dark	Down	74.5	190.1	Up	08:15:52 - 08:45:52	3479
Yerington	08:30:50	-72.8	Dark	Down	74.6	192.4	Up	08:15:50 - 08:45:50	3455
Gardnerville	08:30:52	-73.1	Dark	Down	74.8	190.4	Up	08:15:52 - 08:45:52	3453
Hawthorne	08:30:49	-73.0	Dark	Down	75.0	194.6	Up	08:15:49 - 08:45:49	3404
Lee Vining	08:30:50	-73.7	Dark	Down	75.6	193.4	Up	08:15:50 - 08:45:50	3345
Bishop	08:30:48	-73.9	Dark	Down	76.1	196.6	Up	08:15:48 - 08:45:48	3277
Beatty	08:30:42	-73.6	Dark	Down	76.1	203.1	Up	08:15:42 - 08:45:42	3222
Patrick	08:30:32	-73.1	Dark	Down	76.2	215.9	Up	08:15:32 - 08:45:32	3056
Laughlin/Bullhead City	08:30:34	-73.7	Dark	Down	76.7	214.1	Up	08:15:34 - 08:45:34	3030
Lake Havasu City	08:30:34	-74.0	Dark	Down	77.2	216.7	Up	08:15:34 - 08:45:34	2956
Wildwood	08:30:49	-76.7	Dark	Down	79.2	200.5	Up	08:15:49 - 08:45:49	2923
Idyllwild	08:30:42	-75.9	Dark	Down	78.9	209.6	Up	08:15:42 - 08:45:42	2878
George/Scottsdale	08:30:25	-72.9	Dark	Down	76.4	226.7	Up	08:15:25 - 08:45:25	2870
Calipatria	08:30:38	-75.6	Dark	Down	78.9	216.1	Up	08:15:38 - 08:45:38	2808
Yuma	08:30:34	-75.3	Dark	Down	78.7	220.9	Up	08:15:34 - 08:45:34	2759