RECON: TNO occultation with 11UG412

Event between 11UG412 and star GA1100:00348219 with event index number of 2128819

Geocentric closest approach at 2025/11/28 02:15:34 UTC

J2000 position of star is 03:10:31.6 +20:17:27
Equinox of date position of star is 03:11:48.3 +20:22:27
Stellar brightness G=14.4, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 77 degrees from the moon. Moon is 48% illuminated.
TNO apparent brightness V=24.2

[RECON map]
TNO is 44.4 AU from the Sun and 43.5 AU from the Earth.
The TNO is moving 24.5 km/sec on the sky relative to the star, or, 2.8 arcsec/hr.
The 1-sigma error in the time of the event is 422 seconds.
The 1-sigma cross-track error in the shadow position is 5401 km.
The sky-plane scale is 31535.5 km/arcsec.

The TNO has an absolute magnitude Hv=7.7
Diameter=173.8 km assuming a 5% albedo -- 7.1 sec chord
Diameter=70.9 km assuming a 30% albedo -- 2.9 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 11UG412, (2025/11/28 02:16UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:24.6 +16:33:34  0.8 20.59  96
Hamal          02:08:38.3 +23:35:02  2.0 15.03  65
57Del Ari      03:13:06.9 +19:49:23  4.3  0.62  77
PPM 118861     03:11:03.4 +19:28:41  7.1  0.94  77
PPM 092278     03:12:53.8 +20:19:22  9.7  0.22  77
11UG412        03:12:00.8 +20:23:16 14.4        77
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 2.1 sigma about the mid-time.
The median site spacing is 19.0 km RECON observability=1.0 and success probability=3.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 02:17:15 -20.7 Dark Up 30.4 94.7 Up 02:02:15 - 02:32:15 10231
Victoria 02:17:26 -18.4 Dark Up 28.5 91.1 Low 02:02:26 - 02:32:26 10207
Peachland 02:17:18 -20.9 Dark Up 30.9 94.6 Up 02:02:18 - 02:32:18 10164
Kelowna 02:17:17 -21.1 Dark Up 31.0 94.9 Up 02:02:17 - 02:32:17 10161
Summerland 02:17:18 -21.0 Dark Up 30.9 94.6 Up 02:02:18 - 02:32:18 10153
Penticton 02:17:19 -21.0 Dark Up 31.0 94.7 Up 02:02:19 - 02:32:19 10146
Oliver 02:17:20 -21.0 Dark Up 31.0 94.4 Up 02:02:20 - 02:32:20 10126
Anarchist Mountain Observatory 02:17:21 -21.1 Dark Up 31.2 94.5 Up 02:02:21 - 02:32:21 10111
Tonasket 02:17:22 -21.0 Dark Up 31.2 94.3 Up 02:02:22 - 02:32:22 10096
Okanogan 02:17:24 -20.8 Dark Up 31.1 93.9 Up 02:02:24 - 02:32:24 10081
Brewster 02:17:25 -20.7 Dark Up 31.0 93.6 Up 02:02:25 - 02:32:25 10072
Manson/Chelan 02:17:26 -20.4 Dark Up 30.7 93.2 Up 02:02:26 - 02:32:26 10072
Wenatchee 02:17:28 -20.2 Dark Up 30.7 92.8 Up 02:02:28 - 02:32:28 10050
Ellensburg 02:17:30 -20.0 Dark Up 30.5 92.4 Up 02:02:30 - 02:32:30 10033
Yakima 02:17:31 -19.9 Dark Up 30.5 92.2 Up 02:02:31 - 02:32:31 10009
Toppenish/White Swan 02:17:32 -20.0 Dark Up 30.7 92.2 Up 02:02:32 - 02:32:32 9991
Goldendale 02:17:35 -19.6 Dark Up 30.4 91.5 Up 02:02:35 - 02:32:35 9972
The Dalles 02:17:36 -19.3 Dark Up 30.2 91.1 Up 02:02:36 - 02:32:36 9970
Maupin 02:17:37 -19.3 Dark Up 30.2 91.0 Up 02:02:37 - 02:32:37 9942
PNWRO 02:17:32 -20.9 Dark Up 31.7 93.1 Up 02:02:32 - 02:32:32 9921
Sisters 02:17:41 -18.8 Dark Up 29.9 90.1 Low 02:02:41 - 02:32:41 9905
Sleaford 02:16:43 -29.6 Dark Up 38.9 108.0 Up 02:01:43 - 02:31:43 9885
Bend 02:17:42 -18.9 Dark Up 30.1 90.2 Up 02:02:42 - 02:32:42 9881
Oregon Observatory 02:17:42 -18.8 Dark Up 30.0 90.0 Up 02:02:42 - 02:32:42 9875
North Lake 02:17:44 -19.1 Dark Up 30.4 90.0 Up 02:02:44 - 02:32:44 9817
Chiloquin 02:17:48 -18.2 Dark Up 29.7 89.0 Low 02:02:48 - 02:32:48 9806
Klamath Falls 02:17:49 -18.2 Dark Up 29.8 88.8 Low 02:02:49 - 02:32:49 9781
Lakeview 02:17:47 -19.3 Dark Up 30.8 89.8 Up 02:02:47 - 02:32:47 9730
Fall River/Burney 02:17:53 -18.3 Dark Up 30.0 88.4 Up 02:02:53 - 02:32:53 9691
Cedarville 02:17:50 -19.3 Dark Up 31.0 89.5 Up 02:02:50 - 02:32:50 9681
Susanville 02:17:54 -18.7 Dark Up 30.6 88.5 Up 02:02:54 - 02:32:54 9623
Greenville 02:17:56 -18.4 Dark Up 30.4 88.2 Up 02:02:56 - 02:32:56 9615
Gimple 02:17:56 -18.5 Dark Up 30.4 88.2 Up 02:02:56 - 02:32:56 9612
Quincy 02:17:56 -18.4 Dark Up 30.4 88.1 Up 02:02:56 - 02:32:56 9601
Portola 02:17:57 -18.7 Dark Up 30.7 88.3 Up 02:02:57 - 02:32:57 9576
Reno 02:17:57 -19.1 Dark Up 31.2 88.5 Up 02:02:57 - 02:32:57 9534
Carson City 02:17:58 -19.1 Dark Up 31.2 88.3 Up 02:02:58 - 02:32:58 9509
Gardnerville 02:17:59 -19.1 Dark Up 31.3 88.2 Up 02:02:59 - 02:32:59 9490
Yerington 02:17:58 -19.5 Dark Up 31.7 88.6 Up 02:02:58 - 02:32:58 9472
Hawthorne 02:18:00 -19.8 Dark Up 32.1 88.6 Up 02:03:00 - 02:33:00 9420
Lee Vining 02:18:01 -19.3 Dark Up 31.7 88.0 Up 02:03:01 - 02:33:01 9398
Tonopah 02:17:59 -20.8 Dark Up 33.2 89.2 Up 02:02:59 - 02:32:59 9335
Bishop 02:18:03 -19.8 Dark Up 32.3 88.1 Up 02:03:03 - 02:33:03 9328
Beatty 02:18:02 -21.0 Dark Up 33.6 88.7 Up 02:03:02 - 02:33:02 9233
Indian Springs 02:18:02 -21.7 Dark Up 34.4 89.1 Up 02:03:02 - 02:33:02 9167
Henderson 02:18:03 -22.2 Dark Up 35.0 89.2 Up 02:03:03 - 02:33:03 9100
Wildwood 02:18:14 -18.9 Dark Up 32.0 85.9 Up 02:03:14 - 02:33:14 9093
Dunrhomin 02:17:34 -30.3 Dark Up 42.3 99.0 Up 02:02:34 - 02:32:34 9049
CU-SBO 02:17:35 -30.2 Dark Up 42.3 98.7 Up 02:02:35 - 02:32:35 9034
Laughlin/Bullhead City 02:18:06 -22.4 Dark Up 35.3 88.8 Up 02:03:06 - 02:33:06 9018
Patrick 02:18:03 -23.0 Dark Up 35.9 89.4 Up 02:03:03 - 02:33:03 9009
Kingman/Dolan Springs 02:18:05 -22.8 Dark Up 35.7 89.1 Up 02:03:05 - 02:33:05 9000
Mohave Valley 02:18:06 -22.3 Dark Up 35.3 88.6 Up 02:03:06 - 02:33:06 8997
Idyllwild 02:18:13 -20.4 Dark Up 33.5 86.7 Up 02:03:13 - 02:33:13 8992
Lake Havasu City 02:18:07 -22.4 Dark Up 35.5 88.5 Up 02:03:07 - 02:33:07 8956
Parker 02:18:09 -22.4 Dark Up 35.5 88.2 Up 02:03:09 - 02:33:09 8927
Calipatria 02:18:13 -21.2 Dark Up 34.5 86.9 Up 02:03:13 - 02:33:13 8896
Yuma 02:18:13 -21.8 Dark Up 35.2 87.0 Up 02:03:13 - 02:33:13 8827
George/Scottsdale 02:18:06 -24.3 Dark Up 37.5 89.3 Up 02:03:06 - 02:33:06 8797

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 11UG412, (2025/11/28 02:16UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 20.59  96
Hamal          02:07:10.7 +23:27:41  2.0 15.03  65
57Del Ari      03:11:38.0 +19:43:36  4.3  0.62  77
PPM 118861     03:09:34.7 +19:22:51  7.1  0.94  77
PPM 092278     03:11:24.6 +20:13:35  9.7  0.22  77
11UG412        03:10:31.6 +20:17:27 14.4        77
Positions are for J2000

Event circumstances last updated at 2022/04/11 23:06:46 UT

Marc W. Buie, Southwest Research Institute

RECON