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 02:27:31 UTC

J2000 position of star is 03:10:31.6 +20:17:27
Equinox of date position of star is 03:11:53.8 +20:22:48
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.
Apparent brightness V=24.2

[RECON map]
Object is 44.4 AU from the Sun and 43.5 AU from the Earth.
Apparent velocity is 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 160 seconds.
The 1-sigma cross-track error in the shadow position is 2421 km.
The sky-plane scale is 31534.9 km/arcsec.

The object 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 5.0 sigma about the mid-time.
The median site spacing is 21.9 km RECON observability=1.0 and success probability=0.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 02:29:10 -22.5 Dark Up 32.3 97.1 Up 02:15:22 - 02:42:59 10455
Victoria 02:29:21 -20.3 Dark Up 30.5 93.4 Up 02:15:32 - 02:43:09 10428
Peachland 02:29:13 -22.8 Dark Up 32.8 97.0 Up 02:15:24 - 02:43:01 10386
Kelowna 02:29:12 -23.0 Dark Up 32.9 97.3 Up 02:15:24 - 02:43:01 10383
Summerland 02:29:14 -22.9 Dark Up 32.9 97.0 Up 02:15:25 - 02:43:02 10374
Penticton 02:29:13 -22.9 Dark Up 32.9 97.0 Up 02:15:24 - 02:43:01 10367
Oliver 02:29:15 -22.9 Dark Up 33.0 96.8 Up 02:15:26 - 02:43:03 10347
Anarchist Mountain Observatory 02:29:15 -23.0 Dark Up 33.1 96.9 Up 02:15:27 - 02:43:04 10332
Okanogan 02:29:18 -22.8 Dark Up 33.1 96.3 Up 02:15:29 - 02:43:06 10300
Brewster 02:29:19 -22.6 Dark Up 33.0 96.0 Up 02:15:31 - 02:43:08 10291
Manson/Chelan 02:29:20 -22.4 Dark Up 32.7 95.5 Up 02:15:32 - 02:43:09 10290
Wenatchee 02:29:22 -22.2 Dark Up 32.7 95.1 Up 02:15:34 - 02:43:11 10267
Ellensburg 02:29:24 -22.0 Dark Up 32.6 94.7 Up 02:15:35 - 02:43:12 10250
Yakima 02:29:26 -21.9 Dark Up 32.6 94.4 Up 02:15:38 - 02:43:15 10226
Toppenish/White Swan 02:29:26 -22.0 Dark Up 32.7 94.4 Up 02:15:38 - 02:43:15 10207
The Dalles 02:29:31 -21.4 Dark Up 32.2 93.3 Up 02:15:42 - 02:43:19 10185
Maupin 02:29:32 -21.4 Dark Up 32.3 93.1 Up 02:15:44 - 02:43:21 10156
PNWRO 02:29:26 -23.0 Dark Up 33.8 95.3 Up 02:15:37 - 02:43:14 10135
Sisters 02:29:35 -20.9 Dark Up 32.0 92.2 Up 02:15:47 - 02:43:24 10118
Sleaford 02:28:46 -31.5 Dark Up 40.6 110.9 Up 02:14:58 - 02:42:35 10105
Bend 02:29:36 -21.0 Dark Up 32.2 92.3 Up 02:15:48 - 02:43:25 10094
Oregon Observatory 02:29:38 -20.9 Dark Up 32.2 92.1 Up 02:15:49 - 02:43:26 10087
Chiloquin 02:29:43 -20.4 Dark Up 31.9 91.0 Up 02:15:54 - 02:43:31 10016
Klamath Falls 02:29:44 -20.4 Dark Up 32.0 90.8 Up 02:15:56 - 02:43:33 9991
Fall River/Burney 02:29:47 -20.5 Dark Up 32.3 90.4 Up 02:15:59 - 02:43:36 9899
Cedarville 02:29:45 -21.4 Dark Up 33.2 91.5 Up 02:15:56 - 02:43:33 9888
Greenville 02:29:49 -20.6 Dark Up 32.6 90.1 Up 02:16:01 - 02:43:38 9821
Gimple 02:29:50 -20.7 Dark Up 32.7 90.1 Up 02:16:02 - 02:43:39 9818
Quincy 02:29:51 -20.6 Dark Up 32.6 90.0 Up 02:16:03 - 02:43:40 9807
Portola 02:29:50 -20.9 Dark Up 33.0 90.2 Up 02:16:02 - 02:43:39 9781
Reno 02:29:51 -21.4 Dark Up 33.5 90.4 Up 02:16:03 - 02:43:40 9739
Carson City 02:29:53 -21.3 Dark Up 33.5 90.2 Up 02:16:04 - 02:43:41 9712
Gardnerville 02:29:53 -21.3 Dark Up 33.6 90.1 Up 02:16:04 - 02:43:41 9693
Yerington 02:29:52 -21.8 Dark Up 34.0 90.5 Up 02:16:03 - 02:43:40 9675
Hawthorne 02:29:54 -22.1 Dark Up 34.5 90.5 Up 02:16:05 - 02:43:42 9622
Lee Vining 02:29:56 -21.6 Dark Up 34.1 89.8 Up 02:16:07 - 02:43:44 9600
Bishop 02:29:57 -22.1 Dark Up 34.7 89.8 Up 02:16:09 - 02:43:46 9528
Beatty 02:29:56 -23.3 Dark Up 36.0 90.5 Up 02:16:07 - 02:43:44 9432
Wildwood 02:30:07 -21.3 Dark Up 34.4 87.5 Up 02:16:19 - 02:43:56 9288
Dunrhomin 02:29:25 -32.5 Dark Up 44.5 101.3 Up 02:15:37 - 02:43:14 9251
Nikitin 02:29:26 -32.5 Dark Up 44.6 101.1 Up 02:15:38 - 02:43:15 9237
CU-SBO 02:29:27 -32.5 Dark Up 44.5 101.0 Up 02:15:39 - 02:43:16 9235
Laughlin/Bullhead City 02:29:58 -24.7 Dark Up 37.7 90.5 Up 02:16:10 - 02:43:47 9214
Patrick 02:29:57 -25.4 Dark Up 38.3 91.1 Up 02:16:09 - 02:43:46 9205
Idyllwild 02:30:06 -22.8 Dark Up 36.0 88.3 Up 02:16:18 - 02:43:55 9186
Lake Havasu City 02:30:00 -24.8 Dark Up 38.0 90.1 Up 02:16:11 - 02:43:48 9151
Calipatria 02:30:06 -23.6 Dark Up 37.0 88.4 Up 02:16:18 - 02:43:55 9090
Yuma 02:30:07 -24.3 Dark Up 37.7 88.6 Up 02:16:18 - 02:43:55 9019
George/Scottsdale 02:29:58 -26.7 Dark Up 40.0 90.9 Up 02:16:10 - 02:43:47 8990

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 2023/11/15 03:51:14 UT

Marc W. Buie, Southwest Research Institute

RECON