RECON: TNO occultation with 10VR11

Event between 10VR11 and star GA1140:01687869 with event index number of 2108144

Geocentric closest approach at 2026/12/13 04:53:08 UTC

J2000 position of star is 05:58:34.7 +25:07:29
Equinox of date position of star is 05:59:59.8 +25:07:30
Stellar brightness G=15.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 143 degrees from the moon. Moon is 15% illuminated.
Apparent brightness V=21.1

[RECON map]
Object is 36.2 AU from the Sun and 35.2 AU from the Earth.
Apparent velocity is 25.6 km/sec on the sky relative to the star, or, 3.6 arcsec/hr.
The 1-sigma error in the time of the event is 197 seconds.
The 1-sigma cross-track error in the shadow position is 3386 km.
The sky-plane scale is 25513.5 km/arcsec.

The object has an absolute magnitude Hv=5.6
Diameter=461.3 km assuming a 5% albedo -- 18.0 sec chord
Diameter=188.3 km assuming a 30% albedo -- 7.4 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 10VR11, (2026/12/13 04:53UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:37.9 +07:24:35  0.4 17.74 139
Alnath         05:27:59.9 +28:37:40  1.6  8.00 136
139 Tau        05:59:40.0 +25:57:16  4.7  0.84 143
PPM 095154     05:59:39.6 +24:37:05  8.4  0.52 143
PPM 095192     06:00:51.3 +25:03:45  9.8  0.15 144
10VR11         06:00:14.5 +25:07:30 15.9       144
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 4.6 sigma about the mid-time.
The median site spacing is 25.9 km RECON observability=1.0 and success probability=12.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 04:55:31 -45.7 Dark Down 41.6 100.8 Up 04:40:31 - 05:10:31 -2391
Kelowna 04:55:31 -46.6 Dark Down 42.3 100.9 Up 04:40:31 - 05:10:31 -2485
Peachland 04:55:32 -46.4 Dark Down 42.1 100.5 Up 04:40:32 - 05:10:32 -2489
Sleaford 04:55:01 -52.8 Dark Down 49.6 116.3 Up 04:40:01 - 05:10:01 -2493
Summerland 04:55:32 -46.5 Dark Down 42.2 100.5 Up 04:40:32 - 05:10:32 -2505
Penticton 04:55:32 -46.6 Dark Down 42.3 100.5 Up 04:40:32 - 05:10:32 -2514
Victoria 04:55:41 -44.6 Dark Down 40.0 96.4 Up 04:40:41 - 05:10:41 -2528
Oliver 04:55:33 -46.8 Dark Down 42.4 100.2 Up 04:40:33 - 05:10:33 -2547
Anarchist Mountain Observatory 04:55:33 -46.9 Dark Down 42.5 100.2 Up 04:40:33 - 05:10:33 -2566
Okanogan 04:55:35 -47.0 Dark Down 42.5 99.4 Up 04:40:35 - 05:10:35 -2623
Brewster 04:55:36 -47.0 Dark Down 42.4 99.0 Up 04:40:36 - 05:10:36 -2645
Manson/Chelan 04:55:37 -46.8 Dark Down 42.2 98.5 Up 04:40:37 - 05:10:37 -2657
Wenatchee 04:55:38 -46.9 Dark Down 42.2 98.0 Up 04:40:38 - 05:10:38 -2699
Ellensburg 04:55:40 -46.9 Dark Down 42.1 97.4 Up 04:40:40 - 05:10:40 -2733
Yakima 04:55:40 -47.0 Dark Down 42.1 97.1 Up 04:40:40 - 05:10:40 -2772
Toppenish/White Swan 04:55:41 -47.2 Dark Down 42.3 97.0 Up 04:40:41 - 05:10:41 -2796
The Dalles 04:55:44 -46.9 Dark Down 41.8 95.7 Up 04:40:44 - 05:10:44 -2854
PNWRO 04:55:38 -48.3 Dark Down 43.3 97.9 Up 04:40:38 - 05:10:38 -2864
Maupin 04:55:44 -47.0 Dark Down 41.9 95.4 Up 04:40:44 - 05:10:44 -2897
Sisters 04:55:47 -46.9 Dark Down 41.7 94.2 Up 04:40:47 - 05:10:47 -2971
Bend 04:55:47 -47.2 Dark Down 41.9 94.2 Up 04:40:47 - 05:10:47 -3000
Oregon Observatory 04:55:47 -47.1 Dark Down 41.8 94.0 Up 04:40:47 - 05:10:47 -3014
Chiloquin 04:55:51 -47.1 Dark Down 41.6 92.5 Up 04:40:51 - 05:10:51 -3134
Klamath Falls 04:55:51 -47.3 Dark Down 41.6 92.3 Up 04:40:51 - 05:10:51 -3169
Cedarville 04:55:50 -48.6 Dark Down 42.9 92.8 Up 04:40:50 - 05:10:50 -3276
Fall River/Burney 04:55:53 -47.8 Dark Down 42.0 91.5 Up 04:40:53 - 05:10:53 -3295
Greenville 04:55:54 -48.3 Dark Down 42.3 91.0 Up 04:40:54 - 05:10:54 -3397
Gimple 04:55:54 -48.3 Dark Down 42.4 91.0 Up 04:40:54 - 05:10:54 -3399
Quincy 04:55:54 -48.3 Dark Down 42.3 90.8 Up 04:40:54 - 05:10:54 -3417
Portola 04:55:53 -48.7 Dark Down 42.7 91.0 Up 04:40:53 - 05:10:53 -3441
Reno 04:55:53 -49.2 Dark Down 43.2 91.2 Up 04:40:53 - 05:10:53 -3483
Carson City 04:55:53 -49.3 Dark Down 43.2 90.8 Up 04:40:53 - 05:10:53 -3520
Gardnerville 04:55:54 -49.4 Dark Down 43.3 90.6 Up 04:40:54 - 05:10:54 -3546
Yerington 04:55:53 -49.8 Dark Down 43.7 91.1 Up 04:40:53 - 05:10:53 -3555
Hawthorne 04:55:52 -50.3 Dark Down 44.1 90.9 Up 04:40:52 - 05:10:52 -3615
Lee Vining 04:55:54 -50.0 Dark Down 43.8 90.1 Up 04:40:54 - 05:10:54 -3661
Dunrhomin 04:55:17 -59.6 Dark Down 54.2 102.8 Up 04:40:17 - 05:10:17 -3697
Nikitin 04:55:18 -59.7 Dark Down 54.2 102.6 Up 04:40:18 - 05:10:18 -3716
CU-SBO 04:55:17 -59.7 Dark Down 54.1 102.4 Up 04:40:17 - 05:10:17 -3721
Bishop 04:55:53 -50.7 Dark Down 44.3 90.0 Up 04:40:53 - 05:10:53 -3739
Beatty 04:55:51 -52.0 Dark Down 45.6 90.5 Up 04:40:51 - 05:10:51 -3825
Patrick 04:55:46 -54.6 Dark Down 48.0 90.6 Up 04:40:46 - 05:10:46 -4044
Laughlin/Bullhead City 04:55:47 -54.0 Dark Down 47.4 89.9 Up 04:40:47 - 05:10:47 -4055
Wildwood 04:55:59 -50.9 Dark Down 44.1 86.7 Up 04:40:59 - 05:10:59 -4073
Lake Havasu City 04:55:48 -54.4 Dark Down 47.6 89.4 Up 04:40:48 - 05:10:48 -4131
Idyllwild 04:55:55 -52.5 Dark Down 45.6 87.3 Up 04:40:55 - 05:10:55 -4156
Calipatria 04:55:53 -53.5 Dark Down 46.6 87.3 Up 04:40:53 - 05:10:53 -4248
George/Scottsdale 04:55:43 -56.5 Dark Down 49.6 89.8 Up 04:40:43 - 05:10:43 -4266
Yuma 04:55:52 -54.3 Dark Down 47.3 87.2 Up 04:40:52 - 05:10:52 -4314

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 10VR11, (2026/12/13 04:53UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 17.74 139
Alnath         05:26:17.6 +28:36:23  1.6  8.00 136
139 Tau        05:57:59.6 +25:57:14  4.7  0.84 143
PPM 095154     05:58:00.2 +24:37:02  8.4  0.52 143
PPM 095192     05:59:11.6 +25:03:45  9.8  0.15 144
10VR11         05:58:34.7 +25:07:29 15.9       143
Positions are for J2000

Event circumstances last updated at 2022/12/25 03:56:45 UT

Marc W. Buie, Southwest Research Institute

RECON