RECON: TNO occultation with 471136

Event between (471136) 10EO65 and star GA0640:38157638 with event index number of 2270048

Geocentric closest approach at 2025/09/13 06:54:05 UTC

J2000 position of star is 19:52:33.5 -24:33:43
Equinox of date position of star is 19:54:01.9 -24:29:51
Stellar brightness G=14.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 130 degrees from the moon. Moon is 63% illuminated.
Apparent brightness V=22.4

[RECON map]
Object is 17.7 AU from the Sun and 17.1 AU from the Earth.
Apparent velocity is 9.5 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 1112 seconds.
The 1-sigma cross-track error in the shadow position is 4580 km.
The sky-plane scale is 12381.0 km/arcsec.

The object has an absolute magnitude Hv=9.7
Diameter=75.9 km assuming a 5% albedo -- 7.4 sec chord
Diameter=31.0 km assuming a 30% albedo -- 3.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 471136, (2025/09/13 06:54UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:59:03.8 -29:29:07  1.2 41.24  93
38Zet Sgr      19:04:14.7 -29:50:28  2.7 12.30 142
PPM 270417     19:55:49.9 -23:52:29  6.1  0.73 130
PPM 270382     19:54:16.3 -24:55:36  8.4  0.43 130
PPM 270369     19:53:37.4 -24:22:15  8.6  0.17 130
471136         19:54:06.3 -24:29:39 14.9       130
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 0.8 sigma about the mid-time.
The median site spacing is 47.7 km RECON observability=0.1 and success probability=0.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 06:51:12 -33.8 Dark Up 8.0 213.4 Really Low 06:36:12 - 07:06:12 4881
Kelowna 06:51:01 -34.8 Dark Up 8.4 214.2 Really Low 06:36:01 - 07:06:01 4848
Peachland 06:51:02 -34.8 Dark Up 8.6 213.9 Really Low 06:36:02 - 07:06:02 4848
Victoria 06:51:18 -35.1 Dark Up 10.9 211.0 Really Low 06:36:18 - 07:06:18 4845
Summerland 06:51:00 -35.0 Dark Up 8.7 214.0 Really Low 06:36:00 - 07:06:00 4842
Penticton 06:51:00 -35.1 Dark Up 8.7 214.1 Really Low 06:36:00 - 07:06:00 4839
Oliver 06:50:58 -35.4 Dark Up 9.0 214.2 Really Low 06:35:58 - 07:05:58 4828
Anarchist Mountain Observatory 06:50:57 -35.6 Dark Up 9.1 214.3 Really Low 06:35:57 - 07:05:57 4821
Okanogan 06:50:53 -36.2 Dark Up 9.7 214.2 Really Low 06:35:53 - 07:05:53 4801
Brewster 06:50:53 -36.4 Dark Up 10.0 214.0 Really Low 06:35:53 - 07:05:53 4794
Manson/Chelan 06:50:54 -36.5 Dark Up 10.3 213.8 Really Low 06:35:54 - 07:05:54 4792
Wenatchee 06:50:52 -36.9 Dark Up 10.8 213.7 Really Low 06:35:52 - 07:05:52 4777
Ellensburg 06:50:52 -37.2 Dark Up 11.2 213.5 Really Low 06:35:52 - 07:05:52 4765
Yakima 06:50:50 -37.6 Dark Up 11.6 213.5 Really Low 06:35:50 - 07:05:50 4751
Toppenish/White Swan 06:50:49 -37.8 Dark Up 11.7 213.7 Really Low 06:35:49 - 07:05:49 4741
Sleaford 06:50:05 -34.2 Dark Up 1.4 225.0 Really Low 06:35:05 - 07:05:05 4731
The Dalles 06:50:49 -38.3 Dark Up 12.6 213.1 Really Low 06:35:49 - 07:05:49 4720
PNWRO 06:50:37 -38.5 Dark Up 11.4 215.0 Really Low 06:35:37 - 07:05:37 4710
Maupin 06:50:47 -38.8 Dark Up 12.9 213.3 Really Low 06:35:47 - 07:05:47 4703
Sisters 06:50:45 -39.4 Dark Up 13.9 213.0 Really Low 06:35:45 - 07:05:45 4675
Bend 06:50:43 -39.7 Dark Up 14.0 213.2 Really Low 06:35:43 - 07:05:43 4662
Oregon Observatory 06:50:44 -39.8 Dark Up 14.2 213.1 Really Low 06:35:44 - 07:05:44 4657
Chiloquin 06:50:38 -40.9 Dark Up 15.4 212.9 Really Low 06:35:38 - 07:05:38 4606
Klamath Falls 06:50:36 -41.3 Dark Up 15.7 213.0 Really Low 06:35:36 - 07:05:36 4590
Cedarville 06:50:21 -42.4 Dark Up 15.6 214.5 Really Low 06:35:21 - 07:05:21 4541
Fall River/Burney 06:50:27 -42.4 Dark Up 16.5 213.5 Really Low 06:35:27 - 07:05:27 4533
Greenville 06:50:19 -43.4 Dark Up 17.1 214.0 Really Low 06:35:19 - 07:05:19 4486
Gimple 06:50:19 -43.4 Dark Up 17.1 214.1 Really Low 06:35:19 - 07:05:19 4485
Quincy 06:50:19 -43.6 Dark Up 17.3 214.1 Really Low 06:35:19 - 07:05:19 4476
Portola 06:50:15 -43.8 Dark Up 17.2 214.5 Really Low 06:35:15 - 07:05:15 4465
Reno 06:50:09 -44.3 Dark Up 17.1 215.0 Really Low 06:35:09 - 07:05:09 4444
Carson City 06:50:06 -44.6 Dark Up 17.4 215.1 Really Low 06:35:06 - 07:05:06 4426
Gardnerville 06:50:05 -44.8 Dark Up 17.6 215.2 Really Low 06:35:05 - 07:05:05 4413
Yerington 06:50:01 -45.0 Dark Up 17.3 215.7 Really Low 06:35:01 - 07:05:01 4408
Hawthorne 06:49:55 -45.5 Dark Up 17.5 216.2 Really Low 06:34:55 - 07:04:55 4378
Lee Vining 06:49:55 -45.9 Dark Up 18.1 215.9 Really Low 06:34:55 - 07:04:55 4356
Bishop 06:49:49 -46.7 Dark Up 18.3 216.6 Really Low 06:34:49 - 07:04:49 4315
Beatty 06:49:34 -47.6 Dark Up 17.9 217.9 Really Low 06:34:34 - 07:04:34 4267
Dunrhomin 06:48:39 -46.0 Dark Up 9.5 226.1 Really Low 06:33:39 - 07:03:39 4238
Nikitin 06:48:38 -46.2 Dark Up 9.6 226.1 Really Low 06:33:38 - 07:03:38 4229
CU-SBO 06:48:38 -46.3 Dark Up 9.7 226.0 Really Low 06:33:38 - 07:03:38 4228
Patrick 06:49:06 -49.7 Dark Up 17.6 220.4 Really Low 06:34:06 - 07:04:06 4140
Laughlin/Bullhead City 06:49:10 -49.8 Dark Up 18.2 219.9 Really Low 06:34:10 - 07:04:10 4137
Wildwood 06:49:34 -49.6 Dark Up 21.0 217.0 Low 06:34:34 - 07:04:34 4136
Lake Havasu City 06:49:04 -50.5 Dark Up 18.6 220.3 Really Low 06:34:04 - 07:04:04 4094
Idyllwild 06:49:18 -50.5 Dark Up 20.4 218.6 Low 06:34:18 - 07:04:18 4089
Calipatria 06:49:06 -51.4 Dark Up 20.3 219.6 Low 06:34:06 - 07:04:06 4033
George/Scottsdale 06:48:43 -51.7 Dark Up 17.9 222.2 Really Low 06:33:43 - 07:03:43 4006
Yuma 06:48:58 -52.1 Dark Up 20.1 220.4 Low 06:33:58 - 07:03:58 3992

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 471136, (2025/09/13 06:54UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.6 -29:37:24  1.2 41.24  93
38Zet Sgr      19:02:36.7 -29:52:49  2.7 12.30 142
PPM 270417     19:54:17.6 -23:56:37  6.1  0.73 130
PPM 270382     19:52:43.2 -24:59:41  8.4  0.43 130
PPM 270369     19:52:04.6 -24:26:18  8.6  0.17 130
471136         19:52:33.5 -24:33:43 14.9       130
Positions are for J2000

Event circumstances last updated at 2024/06/18 02:53:52 UT

Marc W. Buie, Southwest Research Institute

RECON