RECON: TNO occultation with 248835

Event between (248835) 06SX368 and star GA1120:02348343 with event index number of 2298841

Geocentric closest approach at 2025/12/28 02:44:40 UTC

J2000 position of star is 06:39:59.2 +23:54:53
Equinox of date position of star is 06:41:28.7 +23:53:26
Stellar brightness G=16.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 89 degrees from the moon. Moon is 54% 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 25.6 km/sec on the sky relative to the star, or, 6.6 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 5800 km.
The sky-plane scale is 14036.9 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, (2025/12/28 02:45UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:54.4 +27:57:41  1.1 15.23 102
Alhena         06:39:12.8 +16:22:30  1.9  7.53  89
PPM 096264     06:39:02.8 +24:34:01  6.5  0.89  88
PPM 096281     06:39:27.3 +23:34:49  7.7  0.57  88
PPM 096343     06:41:46.5 +23:48:52  9.8  0.09  89
248835         06:41:34.3 +23:53:21 16.7        89
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 26.2 km RECON observability=1.0 and success probability=7.2%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 02:47:06 -24.7 Dark Up 23.4 80.2 Low 02:32:06 - 03:02:06 3811
Victoria 02:47:14 -22.4 Dark Up 21.0 77.2 Low 02:32:14 - 03:02:14 3763
Peachland 02:47:09 -24.9 Dark Up 23.6 80.3 Low 02:32:09 - 03:02:09 3734
Kelowna 02:47:08 -25.1 Dark Up 23.8 80.6 Low 02:32:08 - 03:02:08 3732
Summerland 02:47:09 -25.0 Dark Up 23.6 80.3 Low 02:32:09 - 03:02:09 3721
Penticton 02:47:09 -25.0 Dark Up 23.7 80.4 Low 02:32:09 - 03:02:09 3714
Oliver 02:47:11 -25.0 Dark Up 23.6 80.2 Low 02:32:11 - 03:02:11 3691
Anarchist Mountain Observatory 02:47:11 -25.1 Dark Up 23.7 80.3 Low 02:32:11 - 03:02:11 3674
Okanogan 02:47:13 -24.9 Dark Up 23.5 79.8 Low 02:32:13 - 03:02:13 3637
Brewster 02:47:14 -24.7 Dark Up 23.3 79.6 Low 02:32:14 - 03:02:14 3625
Manson/Chelan 02:47:15 -24.4 Dark Up 23.0 79.2 Low 02:32:15 - 03:02:15 3622
Wenatchee 02:47:17 -24.3 Dark Up 22.8 78.9 Low 02:32:17 - 03:02:17 3595
Ellensburg 02:47:18 -24.1 Dark Up 22.6 78.6 Low 02:32:18 - 03:02:18 3574
Yakima 02:47:19 -24.0 Dark Up 22.5 78.4 Low 02:32:19 - 03:02:19 3546
Toppenish/White Swan 02:47:20 -24.1 Dark Up 22.6 78.5 Low 02:32:20 - 03:02:20 3526
Sleaford 02:46:51 -33.6 Dark Up 32.4 91.9 Up 02:31:51 - 03:01:51 3497
The Dalles 02:47:23 -23.4 Dark Up 21.9 77.6 Low 02:32:23 - 03:02:23 3497
Maupin 02:47:24 -23.4 Dark Up 21.9 77.6 Low 02:32:24 - 03:02:24 3464
PNWRO 02:47:21 -25.0 Dark Up 23.5 79.3 Low 02:32:21 - 03:02:21 3453
Sisters 02:47:27 -22.9 Dark Up 21.4 76.9 Low 02:32:27 - 03:02:27 3418
Bend 02:47:28 -23.0 Dark Up 21.5 77.0 Low 02:32:28 - 03:02:28 3393
Oregon Observatory 02:47:29 -22.9 Dark Up 21.4 76.8 Low 02:32:29 - 03:02:29 3385
Chiloquin 02:47:33 -22.4 Dark Up 20.8 76.1 Low 02:32:33 - 03:02:33 3303
Klamath Falls 02:47:34 -22.4 Dark Up 20.7 76.0 Low 02:32:34 - 03:02:34 3275
Fall River/Burney 02:47:38 -22.4 Dark Up 20.8 75.8 Low 02:32:38 - 03:02:38 3174
Cedarville 02:47:36 -23.4 Dark Up 21.8 76.7 Low 02:32:36 - 03:02:36 3169
Greenville 02:47:40 -22.6 Dark Up 20.9 75.8 Low 02:32:40 - 03:02:40 3090
Gimple 02:47:40 -22.6 Dark Up 20.9 75.8 Low 02:32:40 - 03:02:40 3087
Quincy 02:47:41 -22.5 Dark Up 20.8 75.7 Low 02:32:41 - 03:02:41 3074
Portola 02:47:41 -22.9 Dark Up 21.1 75.9 Low 02:32:41 - 03:02:41 3048
Reno 02:47:41 -23.3 Dark Up 21.6 76.2 Low 02:32:41 - 03:02:41 3004
Carson City 02:47:43 -23.3 Dark Up 21.5 76.1 Low 02:32:43 - 03:02:43 2975
Gardnerville 02:47:43 -23.2 Dark Up 21.5 76.0 Low 02:32:43 - 03:02:43 2955
Yerington 02:47:43 -23.7 Dark Up 21.9 76.3 Low 02:32:43 - 03:02:43 2938
Hawthorne 02:47:44 -24.0 Dark Up 22.2 76.4 Low 02:32:44 - 03:02:44 2882
Lee Vining 02:47:46 -23.5 Dark Up 21.7 76.0 Low 02:32:46 - 03:02:46 2855
Bishop 02:47:47 -24.0 Dark Up 22.1 76.1 Low 02:32:47 - 03:02:47 2780
Beatty 02:47:47 -25.2 Dark Up 23.3 76.8 Low 02:32:47 - 03:02:47 2683
Dunrhomin 02:47:27 -34.5 Dark Up 32.7 85.0 Up 02:32:27 - 03:02:27 2554
Nikitin 02:47:28 -34.5 Dark Up 32.7 84.9 Up 02:32:28 - 03:02:28 2539
CU-SBO 02:47:28 -34.4 Dark Up 32.6 84.8 Up 02:32:28 - 03:02:28 2536
Wildwood 02:47:56 -23.1 Dark Up 21.2 74.8 Low 02:32:56 - 03:02:56 2517
Laughlin/Bullhead City 02:47:51 -26.6 Dark Up 24.7 77.2 Low 02:32:51 - 03:02:51 2457
Patrick 02:47:49 -27.2 Dark Up 25.3 77.6 Low 02:32:49 - 03:02:49 2452
Idyllwild 02:47:56 -24.6 Dark Up 22.6 75.5 Low 02:32:56 - 03:02:56 2416
Lake Havasu City 02:47:52 -26.7 Dark Up 24.7 77.0 Low 02:32:52 - 03:02:52 2390
Calipatria 02:47:56 -25.4 Dark Up 23.4 75.8 Low 02:32:56 - 03:02:56 2317
Yuma 02:47:57 -26.1 Dark Up 24.1 76.1 Low 02:32:57 - 03:02:57 2246
George/Scottsdale 02:47:52 -28.5 Dark Up 26.5 77.8 Low 02:32:52 - 03:02:52 2230

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, (2025/12/28 02:45UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 15.23 102
Alhena         06:37:42.8 +16:23:57  1.9  7.53  89
PPM 096264     06:37:27.2 +24:35:27  6.5  0.89  88
PPM 096281     06:37:52.4 +23:36:17  7.7  0.57  88
PPM 096343     06:40:11.5 +23:50:24  9.8  0.09  89
248835         06:39:59.2 +23:54:53 16.7        88
Positions are for J2000

Event circumstances last updated at 2024/06/18 21:23:43 UT

Marc W. Buie, Southwest Research Institute

RECON