RECON: TNO occultation with 10MR116

Event between 10MR116 and star GA1180:00290352 with event index number of 2102015

Geocentric closest approach at 2026/10/06 03:32:08 UTC

J2000 position of star is 02:03:24.9 +28:10:31
Equinox of date position of star is 02:04:47.5 +28:17:23
Stellar brightness G=15.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 98 degrees from the moon. Moon is 22% illuminated.
Apparent brightness V=23.1

[RECON map]
Object is 42.8 AU from the Sun and 42.0 AU from the Earth.
Apparent velocity is 22.5 km/sec on the sky relative to the star, or, 2.7 arcsec/hr.
The 1-sigma error in the time of the event is 273 seconds.
The 1-sigma cross-track error in the shadow position is 4365 km.
The sky-plane scale is 30433.5 km/arcsec.

The object has an absolute magnitude Hv=6.7
Diameter=280.6 km assuming a 5% albedo -- 12.5 sec chord
Diameter=114.5 km assuming a 30% albedo -- 5.1 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 10MR116, (2026/10/06 03:32UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:27.6 +16:33:40  0.8 36.96  67
Hamal          02:08:41.2 +23:35:16  2.0  4.79  99
10 Ari         02:05:10.9 +26:03:48  6.1  2.24  98
PPM 091301     02:03:40.2 +28:31:42  7.6  0.36  98
PPM 091308     02:04:10.2 +28:14:14  9.5  0.18  98
10MR116        02:04:57.1 +28:18:11 15.9        97
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 19.4 km RECON observability=1.0 and success probability=10.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 03:34:35 -20.3 Dark Down 25.8 76.3 Low 03:19:35 - 03:49:35 617
Victoria 03:34:44 -19.1 Dark Down 23.4 73.3 Low 03:19:44 - 03:49:44 609
Peachland 03:34:39 -21.0 Dark Down 26.0 76.3 Low 03:19:39 - 03:49:39 547
Kelowna 03:34:38 -21.2 Dark Down 26.2 76.5 Low 03:19:38 - 03:49:38 542
Summerland 03:34:39 -21.1 Dark Down 26.0 76.3 Low 03:19:39 - 03:49:39 535
Penticton 03:34:40 -21.2 Dark Down 26.1 76.3 Low 03:19:40 - 03:49:40 528
Oliver 03:34:41 -21.3 Dark Down 26.0 76.2 Low 03:19:41 - 03:49:41 508
Anarchist Mountain Observatory 03:34:42 -21.5 Dark Down 26.1 76.2 Low 03:19:42 - 03:49:42 492
Okanogan 03:34:45 -21.5 Dark Down 25.8 75.8 Low 03:19:45 - 03:49:45 464
Manson/Chelan 03:34:47 -21.3 Dark Down 25.3 75.2 Low 03:19:47 - 03:49:47 457
Brewster 03:34:46 -21.5 Dark Down 25.6 75.5 Low 03:19:46 - 03:49:46 455
Wenatchee 03:34:49 -21.4 Dark Down 25.1 74.9 Low 03:19:49 - 03:49:49 436
Ellensburg 03:34:50 -21.3 Dark Down 24.8 74.5 Low 03:19:50 - 03:49:50 421
Yakima 03:34:52 -21.4 Dark Down 24.7 74.3 Low 03:19:52 - 03:49:52 398
Toppenish/White Swan 03:34:53 -21.6 Dark Down 24.8 74.4 Low 03:19:53 - 03:49:53 379
The Dalles 03:34:56 -21.3 Dark Down 24.0 73.5 Low 03:19:56 - 03:49:56 362
Maupin 03:34:58 -21.5 Dark Down 24.0 73.4 Low 03:19:58 - 03:49:58 333
PNWRO 03:34:54 -22.7 Dark Down 25.7 75.1 Low 03:19:54 - 03:49:54 300
Sisters 03:35:01 -21.4 Dark Down 23.4 72.8 Low 03:20:01 - 03:50:01 300
Bend 03:35:02 -21.6 Dark Down 23.5 72.8 Low 03:20:02 - 03:50:02 275
Oregon Observatory 03:35:03 -21.6 Dark Down 23.4 72.7 Low 03:20:03 - 03:50:03 270
Chiloquin 03:35:08 -21.6 Dark Down 22.7 71.9 Low 03:20:08 - 03:50:08 204
Sleaford 03:34:22 -27.9 Dark Down 34.9 87.6 Up 03:19:22 - 03:49:22 204
Klamath Falls 03:35:09 -21.8 Dark Down 22.7 71.8 Low 03:20:09 - 03:50:09 179
Fall River/Burney 03:35:14 -22.3 Dark Down 22.6 71.6 Low 03:20:14 - 03:50:14 88
Cedarville 03:35:11 -23.1 Dark Down 23.6 72.5 Low 03:20:11 - 03:50:11 70
Greenville 03:35:17 -22.9 Dark Down 22.6 71.5 Low 03:20:17 - 03:50:17 10
Gimple 03:35:17 -22.9 Dark Down 22.7 71.5 Low 03:20:17 - 03:50:17 7
Quincy 03:35:18 -22.9 Dark Down 22.6 71.4 Low 03:20:18 - 03:50:18 -3
Portola 03:35:18 -23.3 Dark Down 22.9 71.6 Low 03:20:18 - 03:50:18 -31
Reno 03:35:19 -23.9 Dark Down 23.3 71.8 Low 03:20:19 - 03:50:19 -76
Carson City 03:35:20 -24.0 Dark Down 23.2 71.7 Low 03:20:20 - 03:50:20 -102
Gardnerville 03:35:21 -24.1 Dark Down 23.1 71.6 Low 03:20:21 - 03:50:21 -120
Yerington 03:35:21 -24.5 Dark Down 23.6 72.0 Low 03:20:21 - 03:50:21 -142
Hawthorne 03:35:22 -25.0 Dark Down 23.8 72.1 Low 03:20:22 - 03:50:22 -196
Lee Vining 03:35:24 -24.8 Dark Down 23.3 71.6 Low 03:20:24 - 03:50:24 -215
Bishop 03:35:26 -25.5 Dark Down 23.7 71.7 Low 03:20:26 - 03:50:26 -289
Beatty 03:35:27 -26.9 Dark Down 24.8 72.3 Low 03:20:27 - 03:50:27 -393
Wildwood 03:35:37 -26.1 Dark Down 22.5 70.3 Low 03:20:37 - 03:50:37 -519
Laughlin/Bullhead City 03:35:32 -29.1 Dark Down 25.9 72.6 Low 03:20:32 - 03:50:32 -619
Idyllwild 03:35:38 -27.7 Dark Down 23.8 71.0 Low 03:20:38 - 03:50:38 -631
Patrick 03:35:30 -29.5 Dark Down 26.6 73.0 Low 03:20:30 - 03:50:30 -632
Dunrhomin 03:35:06 -34.2 Dark Down 34.3 80.1 Up 03:20:06 - 03:50:06 -641
Nikitin 03:35:07 -34.2 Dark Down 34.2 80.0 Up 03:20:07 - 03:50:07 -654
CU-SBO 03:35:07 -34.2 Dark Down 34.2 79.9 Up 03:20:07 - 03:50:07 -656
Lake Havasu City 03:35:34 -29.4 Dark Down 25.9 72.4 Low 03:20:34 - 03:50:34 -682
Calipatria 03:35:39 -28.8 Dark Down 24.6 71.2 Low 03:20:39 - 03:50:39 -733
Yuma 03:35:40 -29.7 Dark Down 25.2 71.4 Low 03:20:40 - 03:50:40 -807
George/Scottsdale 03:35:35 -31.6 Dark Down 27.7 73.1 Low 03:20:35 - 03:50:35 -854

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 10MR116, (2026/10/06 03:32UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 36.96  67
Hamal          02:07:10.7 +23:27:41  2.0  4.79  99
10 Ari         02:03:39.6 +25:56:09  6.1  2.24  98
PPM 091301     02:02:08.0 +28:24:01  7.6  0.36  98
PPM 091308     02:02:38.1 +28:06:34  9.5  0.18  98
10MR116        02:03:24.9 +28:10:31 15.9        98
Positions are for J2000

Event circumstances last updated at 2023/12/17 04:19:38 UT

Marc W. Buie, Southwest Research Institute

RECON