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 02:04:41.8 +28:16:55
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.
TNO apparent brightness V=23.1

[RECON map]
TNO is 42.8 AU from the Sun and 42.0 AU from the Earth.
The TNO is moving 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 4363 km.
The sky-plane scale is 30433.5 km/arcsec.

The TNO 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 18.7 km RECON observability=1.0 and success probability=9.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 03:34:35 -20.3 Dark Down 25.8 76.3 Low 03:19:35 - 03:49:35 618
Victoria 03:34:44 -19.1 Dark Down 23.4 73.3 Low 03:19:44 - 03:49:44 610
Peachland 03:34:39 -21.0 Dark Down 26.0 76.3 Low 03:19:39 - 03:49:39 548
Kelowna 03:34:38 -21.2 Dark Down 26.2 76.5 Low 03:19:38 - 03:49:38 544
Summerland 03:34:40 -21.1 Dark Down 26.0 76.3 Low 03:19:40 - 03:49:40 537
Penticton 03:34:40 -21.2 Dark Down 26.1 76.3 Low 03:19:40 - 03:49:40 529
Oliver 03:34:41 -21.3 Dark Down 26.0 76.2 Low 03:19:41 - 03:49:41 510
Anarchist Mountain Observatory 03:34:42 -21.5 Dark Down 26.1 76.2 Low 03:19:42 - 03:49:42 494
Tonasket 03:34:43 -21.5 Dark Down 26.0 76.0 Low 03:19:43 - 03:49:43 478
Okanogan 03:34:44 -21.5 Dark Down 25.8 75.8 Low 03:19:44 - 03:49:44 465
Manson/Chelan 03:34:47 -21.3 Dark Down 25.3 75.2 Low 03:19:47 - 03:49:47 458
Brewster 03:34:45 -21.5 Dark Down 25.6 75.5 Low 03:19:45 - 03:49:45 457
Wenatchee 03:34:49 -21.4 Dark Down 25.1 74.9 Low 03:19:49 - 03:49:49 437
Ellensburg 03:34:50 -21.3 Dark Down 24.8 74.5 Low 03:19:50 - 03:49:50 422
Yakima 03:34:52 -21.4 Dark Down 24.7 74.3 Low 03:19:52 - 03:49:52 399
Toppenish/White Swan 03:34:53 -21.6 Dark Down 24.8 74.4 Low 03:19:53 - 03:49:53 380
The Dalles 03:34:56 -21.3 Dark Down 24.0 73.5 Low 03:19:56 - 03:49:56 363
Goldendale 03:34:55 -21.5 Dark Down 24.3 73.9 Low 03:19:55 - 03:49:55 363
Maupin 03:34:57 -21.5 Dark Down 24.0 73.4 Low 03:19:57 - 03:49:57 335
PNWRO 03:34:54 -22.7 Dark Down 25.7 75.1 Low 03:19:54 - 03:49:54 302
Sisters 03:35:01 -21.4 Dark Down 23.4 72.8 Low 03:20:01 - 03:50:01 301
Bend 03:35:02 -21.6 Dark Down 23.5 72.8 Low 03:20:02 - 03:50:02 276
Oregon Observatory 03:35:03 -21.6 Dark Down 23.4 72.7 Low 03:20:03 - 03:50:03 271
North Lake 03:35:05 -22.1 Dark Down 23.6 72.7 Low 03:20:05 - 03:50:05 210
Chiloquin 03:35:08 -21.6 Dark Down 22.7 71.9 Low 03:20:08 - 03:50:08 206
Sleaford 03:34:22 -27.9 Dark Down 34.9 87.6 Up 03:19:22 - 03:49:22 205
Klamath Falls 03:35:09 -21.8 Dark Down 22.7 71.8 Low 03:20:09 - 03:50:09 181
Lakeview 03:35:09 -22.8 Dark Down 23.7 72.6 Low 03:20:09 - 03:50:09 121
Fall River/Burney 03:35:13 -22.3 Dark Down 22.6 71.6 Low 03:20:13 - 03:50:13 89
Cedarville 03:35:11 -23.1 Dark Down 23.6 72.5 Low 03:20:11 - 03:50:11 72
Susanville 03:35:16 -23.0 Dark Down 22.9 71.7 Low 03:20:16 - 03:50:16 18
Greenville 03:35:17 -22.9 Dark Down 22.6 71.5 Low 03:20:17 - 03:50:17 12
Gimple 03:35:17 -22.9 Dark Down 22.7 71.5 Low 03:20:17 - 03:50:17 8
Quincy 03:35:17 -22.9 Dark Down 22.6 71.4 Low 03:20:17 - 03:50:17 -2
Portola 03:35:18 -23.3 Dark Down 22.9 71.6 Low 03:20:18 - 03:50:18 -30
Reno 03:35:19 -23.9 Dark Down 23.3 71.8 Low 03:20:19 - 03:50:19 -75
Carson City 03:35:20 -24.0 Dark Down 23.2 71.7 Low 03:20:20 - 03:50:20 -100
Gardnerville 03:35:21 -24.1 Dark Down 23.1 71.6 Low 03:20:21 - 03:50:21 -119
Yerington 03:35:21 -24.5 Dark Down 23.6 72.0 Low 03:20:21 - 03:50:21 -141
Hawthorne 03:35:22 -25.0 Dark Down 23.8 72.1 Low 03:20:22 - 03:50:22 -195
Lee Vining 03:35:24 -24.8 Dark Down 23.3 71.6 Low 03:20:24 - 03:50:24 -213
Bishop 03:35:26 -25.5 Dark Down 23.7 71.7 Low 03:20:26 - 03:50:26 -287
Tonopah 03:35:23 -26.2 Dark Down 24.8 72.6 Low 03:20:23 - 03:50:23 -288
Beatty 03:35:27 -26.9 Dark Down 24.8 72.3 Low 03:20:27 - 03:50:27 -392
Indian Springs 03:35:28 -27.8 Dark Down 25.5 72.7 Low 03:20:28 - 03:50:28 -463
Wildwood 03:35:37 -26.1 Dark Down 22.5 70.3 Low 03:20:37 - 03:50:37 -518
Henderson 03:35:29 -28.5 Dark Down 25.9 72.8 Low 03:20:29 - 03:50:29 -534
Laughlin/Bullhead City 03:35:32 -29.1 Dark Down 25.9 72.6 Low 03:20:32 - 03:50:32 -618
Idyllwild 03:35:37 -27.7 Dark Down 23.8 71.0 Low 03:20:37 - 03:50:37 -630
Patrick 03:35:31 -29.5 Dark Down 26.6 73.0 Low 03:20:31 - 03:50:31 -631
Mohave Valley 03:35:33 -29.1 Dark Down 25.9 72.4 Low 03:20:33 - 03:50:33 -639
Kingman/Dolan Springs 03:35:31 -29.5 Dark Down 26.3 72.8 Low 03:20:31 - 03:50:31 -639
Dunrhomin 03:35:06 -34.2 Dark Down 34.3 80.1 Up 03:20:06 - 03:50:06 -640
CU-SBO 03:35:07 -34.2 Dark Down 34.2 79.9 Up 03:20:07 - 03:50:07 -655
Lake Havasu City 03:35:34 -29.4 Dark Down 25.9 72.4 Low 03:20:34 - 03:50:34 -681
Parker 03:35:35 -29.6 Dark Down 25.9 72.2 Low 03:20:35 - 03:50:35 -709
Calipatria 03:35:39 -28.8 Dark Down 24.6 71.2 Low 03:20:39 - 03:50:39 -731
Yuma 03:35:40 -29.7 Dark Down 25.2 71.4 Low 03:20:40 - 03:50:40 -806
George/Scottsdale 03:35:35 -31.6 Dark Down 27.7 73.1 Low 03:20:35 - 03:50:35 -853

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 2022/04/22 23:08:26 UT

Marc W. Buie, Southwest Research Institute

RECON