RECON: TNO occultation with 118228

Event between (118228) 96TQ66 and star GA1260:01861310 with event index number of 2111192

Geocentric closest approach at 2026/12/01 04:50:06 UTC

J2000 position of star is 05:15:54.7 +37:16:23
Equinox of date position of star is 05:17:25.6 +37:17:47
Stellar brightness G=13.8, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 78 degrees from the moon. Moon is 51% illuminated.
TNO apparent brightness V=22.7

[RECON map]
TNO is 36.0 AU from the Sun and 35.1 AU from the Earth.
The TNO is moving 24.5 km/sec on the sky relative to the star, or, 3.5 arcsec/hr.
The 1-sigma error in the time of the event is 372 seconds.
The 1-sigma cross-track error in the shadow position is 2372 km.
The sky-plane scale is 25466.4 km/arcsec.

The TNO has an absolute magnitude Hv=7.1
Diameter=224.9 km assuming a 5% albedo -- 9.2 sec chord
Diameter=91.8 km assuming a 30% albedo -- 3.7 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 118228, (2026/12/01 04:50UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:28.1 +16:33:41  0.8 22.56  88
3Iot Aur       04:58:45.1 +33:12:22  2.7  5.64  82
PPM 070048     05:15:06.9 +37:21:59  6.5  0.53  79
PPM 070061     05:15:38.6 +37:03:43  7.1  0.48  78
PPM 070105     05:17:47.0 +37:11:59  9.7  0.10  78
118228         05:17:44.4 +37:18:04 13.8        78
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 2.4 sigma about the mid-time.
The median site spacing is 28.0 km RECON observability=1.0 and success probability=9.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 04:52:24 -45.0 Dark Down 48.5 86.4 Up 04:37:24 - 05:07:24 -3542
Victoria 04:52:34 -43.9 Dark Down 46.4 82.0 Up 04:37:34 - 05:07:34 -3613
Peachland 04:52:25 -45.7 Dark Down 48.8 85.8 Up 04:37:25 - 05:07:25 -3643
Kelowna 04:52:24 -45.8 Dark Down 49.0 86.2 Up 04:37:24 - 05:07:24 -3644
Summerland 04:52:25 -45.8 Dark Down 48.9 85.7 Up 04:37:25 - 05:07:25 -3659
Penticton 04:52:25 -45.9 Dark Down 49.0 85.7 Up 04:37:25 - 05:07:25 -3669
Oliver 04:52:26 -46.1 Dark Down 48.9 85.3 Up 04:37:26 - 05:07:26 -3699
Anarchist Mountain Observatory 04:52:26 -46.2 Dark Down 49.1 85.3 Up 04:37:26 - 05:07:26 -3721
Tonasket 04:52:27 -46.3 Dark Down 49.0 84.9 Up 04:37:27 - 05:07:27 -3746
Okanogan 04:52:29 -46.4 Dark Down 48.9 84.4 Up 04:37:29 - 05:07:29 -3770
Brewster 04:52:30 -46.3 Dark Down 48.7 83.9 Up 04:37:30 - 05:07:30 -3786
Manson/Chelan 04:52:31 -46.2 Dark Down 48.4 83.5 Up 04:37:31 - 05:07:31 -3791
Wenatchee 04:52:32 -46.2 Dark Down 48.3 82.8 Up 04:37:32 - 05:07:32 -3826
Ellensburg 04:52:34 -46.2 Dark Down 48.1 82.2 Up 04:37:34 - 05:07:34 -3854
Sleaford 04:51:53 -51.8 Dark Down 57.3 100.2 Up 04:36:53 - 05:06:53 -3870
Yakima 04:52:35 -46.4 Dark Down 48.0 81.8 Up 04:37:35 - 05:07:35 -3889
Toppenish/White Swan 04:52:35 -46.5 Dark Down 48.1 81.6 Up 04:37:35 - 05:07:35 -3915
Goldendale 04:52:38 -46.4 Dark Down 47.7 80.8 Up 04:37:38 - 05:07:38 -3948
The Dalles 04:52:39 -46.3 Dark Down 47.4 80.3 Up 04:37:39 - 05:07:39 -3953
Maupin 04:52:40 -46.5 Dark Down 47.4 79.9 Up 04:37:40 - 05:07:40 -3994
PNWRO 04:52:34 -47.6 Dark Down 49.1 82.1 Up 04:37:34 - 05:07:34 -4005
Sisters 04:52:43 -46.4 Dark Down 46.9 78.7 Up 04:37:43 - 05:07:43 -4053
Bend 04:52:43 -46.6 Dark Down 47.1 78.6 Up 04:37:43 - 05:07:43 -4085
Oregon Observatory 04:52:44 -46.6 Dark Down 46.9 78.4 Up 04:37:44 - 05:07:44 -4095
North Lake 04:52:45 -47.1 Dark Down 47.2 78.0 Up 04:37:45 - 05:07:45 -4174
Chiloquin 04:52:48 -46.6 Dark Down 46.4 76.8 Up 04:37:48 - 05:07:48 -4196
Klamath Falls 04:52:49 -46.8 Dark Down 46.4 76.5 Up 04:37:49 - 05:07:49 -4230
Lakeview 04:52:47 -47.8 Dark Down 47.4 77.2 Up 04:37:47 - 05:07:47 -4293
Fall River/Burney 04:52:51 -47.3 Dark Down 46.4 75.5 Up 04:37:51 - 05:07:51 -4353
Cedarville 04:52:47 -48.1 Dark Down 47.4 76.6 Up 04:37:47 - 05:07:47 -4360
Susanville 04:52:51 -48.0 Dark Down 46.7 75.2 Up 04:37:51 - 05:07:51 -4442
Greenville 04:52:53 -47.9 Dark Down 46.5 74.8 Up 04:37:53 - 05:07:53 -4455
Gimple 04:52:52 -47.9 Dark Down 46.5 74.8 Up 04:37:52 - 05:07:52 -4459
Quincy 04:52:52 -47.9 Dark Down 46.4 74.6 Up 04:37:52 - 05:07:52 -4474
Portola 04:52:52 -48.3 Dark Down 46.7 74.6 Up 04:37:52 - 05:07:52 -4506
Reno 04:52:51 -48.8 Dark Down 47.1 74.6 Up 04:37:51 - 05:07:51 -4558
Carson City 04:52:52 -48.9 Dark Down 47.1 74.3 Up 04:37:52 - 05:07:52 -4593
Gardnerville 04:52:52 -49.0 Dark Down 47.0 74.0 Up 04:37:52 - 05:07:52 -4617
Yerington 04:52:51 -49.5 Dark Down 47.5 74.3 Up 04:37:51 - 05:07:51 -4638
Hawthorne 04:52:52 -50.0 Dark Down 47.8 74.1 Up 04:37:52 - 05:07:52 -4704
Lee Vining 04:52:53 -49.7 Dark Down 47.2 73.3 Up 04:37:53 - 05:07:53 -4736
Tonopah 04:52:50 -51.1 Dark Down 48.7 74.1 Up 04:37:50 - 05:07:50 -4808
Bishop 04:52:53 -50.4 Dark Down 47.6 72.9 Up 04:37:53 - 05:07:53 -4824
Beatty 04:52:51 -51.7 Dark Down 48.7 73.0 Up 04:37:51 - 05:07:51 -4938
Indian Springs 04:52:49 -52.7 Dark Down 49.4 73.0 Up 04:37:49 - 05:07:49 -5015
Dunrhomin 04:52:16 -59.1 Dark Down 58.2 81.9 Up 04:37:16 - 05:07:16 -5050
CU-SBO 04:52:17 -59.1 Dark Down 58.1 81.5 Up 04:37:17 - 05:07:17 -5072
Henderson 04:52:49 -53.3 Dark Down 49.8 72.6 Up 04:37:49 - 05:07:49 -5096
Wildwood 04:53:01 -50.7 Dark Down 46.4 69.5 Up 04:38:01 - 05:08:01 -5125
Laughlin/Bullhead City 04:52:49 -53.8 Dark Down 49.9 71.7 Up 04:37:49 - 05:07:49 -5197
Patrick 04:52:47 -54.3 Dark Down 50.5 72.2 Up 04:37:47 - 05:07:47 -5203
Kingman/Dolan Springs 04:52:48 -54.2 Dark Down 50.3 71.9 Up 04:37:48 - 05:07:48 -5217
Mohave Valley 04:52:50 -53.9 Dark Down 49.8 71.4 Up 04:37:50 - 05:07:50 -5224
Idyllwild 04:52:57 -52.3 Dark Down 47.8 69.6 Up 04:37:57 - 05:07:57 -5244
Lake Havasu City 04:52:50 -54.1 Dark Down 49.9 71.0 Up 04:37:50 - 05:07:50 -5274
Parker 04:52:50 -54.2 Dark Down 49.8 70.6 Up 04:37:50 - 05:07:50 -5309
Calipatria 04:52:55 -53.4 Dark Down 48.5 69.3 Up 04:37:55 - 05:07:55 -5355
Yuma 04:52:54 -54.2 Dark Down 49.0 69.0 Up 04:37:54 - 05:07:54 -5436
George/Scottsdale 04:52:45 -56.3 Dark Down 51.5 70.7 Up 04:37:45 - 05:07:45 -5453

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 118228, (2026/12/01 04:50UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 22.56  88
3Iot Aur       04:56:59.6 +33:09:58  2.7  5.64  82
PPM 070048     05:13:17.2 +37:20:12  6.5  0.53  79
PPM 070061     05:13:49.2 +37:01:57  7.1  0.48  78
PPM 070105     05:15:57.4 +37:10:18  9.7  0.10  78
118228         05:15:54.7 +37:16:23 13.8        78
Positions are for J2000

Event circumstances last updated at 2022/04/25 23:02:49 UT

Marc W. Buie, Southwest Research Institute

RECON