RECON: TNO occultation with 10VR11

Event between 10VR11 and star GA1140:01594912 with event index number of 2108034

Geocentric closest approach at 2025/11/27 05:35:23 UTC

J2000 position of star is 05:53:23.0 +24:09:02
Equinox of date position of star is 05:54:47.4 +24:09:13
Stellar brightness G=15.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 126 degrees from the moon. Moon is 39% illuminated.
Apparent brightness V=21.2

[RECON map]
Object is 36.2 AU from the Sun and 35.3 AU from the Earth.
Apparent velocity is 23.4 km/sec on the sky relative to the star, or, 3.3 arcsec/hr.
The 1-sigma error in the time of the event is 195 seconds.
The 1-sigma cross-track error in the shadow position is 3014 km.
The sky-plane scale is 25620.5 km/arcsec.

The object has an absolute magnitude Hv=5.6
Diameter=461.3 km assuming a 5% albedo -- 19.7 sec chord
Diameter=188.3 km assuming a 30% albedo -- 8.0 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 10VR11, (2025/11/27 05:35UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:34.5 +07:24:35  0.4 16.75 124
Alnath         05:27:55.9 +28:37:37  1.6  7.53 120
PPM 095124     05:58:31.3 +24:15:04  5.8  0.82 127
PPM 095035     05:55:08.9 +24:17:25  8.1  0.14 126
PPM 095027     05:54:51.8 +24:04:57  9.9  0.08 126
10VR11         05:54:58.2 +24:09:15 15.6       126
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 25.6 km RECON observability=1.0 and success probability=9.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 05:38:07 -50.9 Dark Up 38.7 98.6 Up 05:23:07 - 05:53:07 5925
Kelowna 05:38:07 -51.9 Dark Up 39.4 98.7 Up 05:23:07 - 05:53:07 5833
Peachland 05:38:08 -51.8 Dark Up 39.2 98.4 Up 05:23:08 - 05:53:08 5829
Summerland 05:38:08 -51.9 Dark Up 39.3 98.3 Up 05:23:08 - 05:53:08 5813
Sleaford 05:37:35 -56.0 Dark Down 46.9 113.3 Up 05:22:35 - 05:52:35 5812
Penticton 05:38:08 -52.0 Dark Up 39.3 98.4 Up 05:23:08 - 05:53:08 5805
Victoria 05:38:18 -50.5 Dark Up 37.0 94.5 Up 05:23:18 - 05:53:18 5793
Oliver 05:38:10 -52.2 Dark Up 39.4 98.1 Up 05:23:10 - 05:53:10 5772
Anarchist Mountain Observatory 05:38:09 -52.5 Dark Up 39.6 98.1 Up 05:23:09 - 05:53:09 5752
Okanogan 05:38:11 -52.7 Dark Up 39.5 97.4 Up 05:23:11 - 05:53:11 5697
Brewster 05:38:13 -52.8 Dark Up 39.4 97.0 Up 05:23:13 - 05:53:13 5676
Manson/Chelan 05:38:14 -52.7 Dark Up 39.2 96.6 Up 05:23:14 - 05:53:14 5664
Wenatchee 05:38:16 -52.9 Dark Up 39.1 96.1 Up 05:23:16 - 05:53:16 5623
Ellensburg 05:38:17 -53.0 Dark Up 39.0 95.6 Up 05:23:17 - 05:53:17 5589
Yakima 05:38:17 -53.2 Dark Up 39.1 95.2 Up 05:23:17 - 05:53:17 5551
Toppenish/White Swan 05:38:18 -53.4 Dark Up 39.2 95.2 Up 05:23:18 - 05:53:18 5527
The Dalles 05:38:21 -53.3 Dark Up 38.7 94.0 Up 05:23:21 - 05:53:21 5470
PNWRO 05:38:16 -54.5 Dark Up 40.3 96.0 Up 05:23:16 - 05:53:16 5459
Maupin 05:38:23 -53.6 Dark Up 38.8 93.7 Up 05:23:23 - 05:53:23 5428
Sisters 05:38:25 -53.7 Dark Up 38.5 92.6 Up 05:23:25 - 05:53:25 5356
Bend 05:38:26 -54.0 Dark Up 38.7 92.6 Up 05:23:26 - 05:53:26 5327
Oregon Observatory 05:38:26 -54.0 Dark Up 38.6 92.4 Up 05:23:26 - 05:53:26 5313
Chiloquin 05:38:30 -54.4 Dark Up 38.4 91.1 Up 05:23:30 - 05:53:30 5195
Klamath Falls 05:38:30 -54.6 Dark Up 38.5 90.9 Up 05:23:30 - 05:53:30 5160
Cedarville 05:38:28 -55.9 Dark Up 39.7 91.4 Up 05:23:28 - 05:53:28 5054
Fall River/Burney 05:38:32 -55.3 Dark Up 38.8 90.2 Up 05:23:32 - 05:53:32 5035
Greenville 05:38:33 -56.0 Dark Up 39.1 89.8 Up 05:23:33 - 05:53:33 4935
Gimple 05:38:34 -56.1 Dark Up 39.2 89.8 Up 05:23:34 - 05:53:34 4933
Quincy 05:38:34 -56.1 Dark Up 39.1 89.6 Up 05:23:34 - 05:53:34 4915
Portola 05:38:33 -56.5 Dark Up 39.5 89.8 Up 05:23:33 - 05:53:33 4891
Reno 05:38:33 -57.1 Dark Up 40.0 90.0 Up 05:23:33 - 05:53:33 4848
Carson City 05:38:33 -57.2 Dark Up 40.0 89.7 Up 05:23:33 - 05:53:33 4812
Gardnerville 05:38:34 -57.4 Dark Up 40.0 89.5 Up 05:23:34 - 05:53:34 4786
Yerington 05:38:32 -57.7 Dark Up 40.5 89.9 Up 05:23:32 - 05:53:32 4777
Hawthorne 05:38:33 -58.3 Dark Up 40.9 89.9 Up 05:23:33 - 05:53:33 4717
Lee Vining 05:38:34 -58.2 Dark Up 40.5 89.1 Up 05:23:34 - 05:53:34 4672
Dunrhomin 05:37:55 -65.8 Dark Down 51.0 101.1 Up 05:22:55 - 05:52:55 4622
Nikitin 05:37:56 -65.9 Dark Down 51.0 100.9 Up 05:22:56 - 05:52:56 4604
CU-SBO 05:37:56 -65.9 Dark Down 50.9 100.7 Up 05:22:56 - 05:52:56 4598
Bishop 05:38:33 -59.0 Dark Up 41.1 89.0 Up 05:23:33 - 05:53:33 4594
Beatty 05:38:30 -60.3 Dark Up 42.4 89.6 Up 05:23:30 - 05:53:30 4508
Patrick 05:38:26 -63.1 Dark Up 44.7 89.8 Up 05:23:26 - 05:53:26 4287
Laughlin/Bullhead City 05:38:28 -62.6 Dark Up 44.1 89.2 Up 05:23:28 - 05:53:28 4278
Wildwood 05:38:40 -59.9 Dark Up 40.8 86.1 Up 05:23:40 - 05:53:40 4263
Lake Havasu City 05:38:29 -63.1 Dark Up 44.3 88.7 Up 05:23:29 - 05:53:29 4202
Idyllwild 05:38:36 -61.5 Dark Up 42.3 86.7 Up 05:23:36 - 05:53:36 4180
Calipatria 05:38:34 -62.7 Dark Up 43.3 86.7 Up 05:23:34 - 05:53:34 4087
George/Scottsdale 05:38:24 -65.3 Dark Up 46.3 89.2 Up 05:23:24 - 05:53:24 4065
Yuma 05:38:33 -63.5 Dark Up 44.0 86.8 Up 05:23:33 - 05:53:33 4020

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, (2025/11/27 05:35UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 16.75 124
Alnath         05:26:17.6 +28:36:23  1.6  7.53 120
PPM 095124     05:56:56.1 +24:14:59  5.8  0.82 127
PPM 095035     05:53:33.6 +24:17:13  8.1  0.14 126
PPM 095027     05:53:16.7 +24:04:44  9.9  0.08 126
10VR11         05:53:23.0 +24:09:02 15.6       126
Positions are for J2000

Event circumstances last updated at 2022/12/25 03:14:50 UT

Marc W. Buie, Southwest Research Institute

RECON