RECON: TNO occultation with 129746

Event between (129746) 99CE119 and star GA0700:06117753 with event index number of 2143184

Geocentric closest approach at 2026/06/01 05:22:30 UTC

J2000 position of star is 16:01:58.3 -19:12:05
Equinox of date position of star is 16:03:22.6 -19:16:03
Stellar brightness G=16.3, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 19 degrees from the moon. Moon is 99% illuminated.
Apparent brightness V=23.1

[RECON map]
Object is 30.0 AU from the Sun and 29.0 AU from the Earth.
Apparent velocity is 23.1 km/sec on the sky relative to the star, or, 4.0 arcsec/hr.
The 1-sigma error in the time of the event is 134 seconds.
The 1-sigma cross-track error in the shadow position is 1590 km.
The sky-plane scale is 21009.8 km/arcsec.

The object has an absolute magnitude Hv=8.4
Diameter=128.2 km assuming a 5% albedo -- 5.6 sec chord
Diameter=52.4 km assuming a 30% albedo -- 2.3 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 129746, (2026/06/01 05:23UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:01.9 -26:29:18  0.9  9.60  10
8Bet1Sco       16:06:58.6 -19:52:32  2.6  1.02  18
8Bet2Sco       16:06:59.1 -19:52:19  5.1  1.01  18
PPM 231101     16:03:47.3 -19:31:26  8.4  0.26  19
PPM 231124     16:04:25.9 -19:16:23  9.7  0.22  19
129746         16:03:30.3 -19:16:25 16.3        19
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 11.6 km RECON observability=0.6 and success probability=11.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 05:24:05 -12.9 AT Up 17.4 164.5 Really Low 05:12:23 - 05:35:47 -610
Kamloops 05:24:45 -9.7 NT Up 15.3 150.7 Really Low 05:13:03 - 05:36:27 -975
Kelowna 05:24:43 -10.7 NT Up 16.3 151.4 Really Low 05:13:01 - 05:36:25 -995
Peachland 05:24:44 -10.7 NT Up 16.3 151.2 Really Low 05:13:02 - 05:36:26 -1007
Summerland 05:24:44 -10.8 NT Up 16.5 151.2 Really Low 05:13:02 - 05:36:26 -1013
Penticton 05:24:44 -10.9 NT Up 16.6 151.3 Really Low 05:13:02 - 05:36:26 -1013
Oliver 05:24:45 -11.2 NT Up 16.9 151.3 Really Low 05:13:03 - 05:36:27 -1031
Anarchist Mountain Observatory 05:24:44 -11.4 NT Up 17.1 151.4 Really Low 05:13:02 - 05:36:26 -1035
Okanogan 05:24:46 -11.9 NT Up 17.6 151.1 Really Low 05:13:04 - 05:36:28 -1075
Brewster 05:24:47 -12.0 AT Up 17.8 150.9 Really Low 05:13:05 - 05:36:29 -1094
Manson/Chelan 05:24:48 -12.0 AT Up 17.8 150.5 Really Low 05:13:06 - 05:36:30 -1114
Wenatchee 05:24:49 -12.4 AT Up 18.2 150.3 Really Low 05:13:07 - 05:36:31 -1144
Victoria 05:24:55 -10.2 NT Up 16.2 147.7 Really Low 05:13:13 - 05:36:37 -1160
Ellensburg 05:24:50 -12.6 AT Up 18.5 150.0 Really Low 05:13:08 - 05:36:32 -1172
PNWRO 05:24:47 -14.1 AT Up 19.9 151.4 Really Low 05:13:05 - 05:36:29 -1186
Dunrhomin 05:24:09 -23.9 Dark Up 28.9 163.9 Low 05:12:27 - 05:35:51 -1189
Yakima 05:24:51 -12.9 AT Up 18.8 149.9 Really Low 05:13:09 - 05:36:33 -1195
Nikitin 05:24:09 -24.1 Dark Up 29.1 163.8 Low 05:12:27 - 05:35:51 -1200
Toppenish/White Swan 05:24:51 -13.2 AT Up 19.1 150.1 Really Low 05:13:09 - 05:36:33 -1203
CU-SBO 05:24:10 -24.1 Dark Up 29.2 163.7 Low 05:12:28 - 05:35:52 -1206
The Dalles 05:24:54 -13.5 AT Up 19.4 149.2 Really Low 05:13:12 - 05:36:36 -1268
Maupin 05:24:54 -13.8 AT Up 19.8 149.2 Really Low 05:13:12 - 05:36:36 -1289
Sisters 05:24:57 -14.3 AT Up 20.4 148.6 Low 05:13:15 - 05:36:39 -1353
Bend 05:24:56 -14.6 AT Up 20.7 148.8 Low 05:13:14 - 05:36:38 -1361
Oregon Observatory 05:24:57 -14.7 AT Up 20.8 148.7 Low 05:13:15 - 05:36:39 -1374
Chiloquin 05:25:00 -15.6 AT Up 21.8 148.0 Low 05:13:18 - 05:36:42 -1467
Klamath Falls 05:25:00 -15.9 AT Up 22.1 148.0 Low 05:13:18 - 05:36:42 -1486
Cedarville 05:24:56 -17.1 AT Up 23.3 149.3 Low 05:13:14 - 05:36:38 -1486
Fall River/Burney 05:25:00 -17.0 AT Up 23.3 148.1 Low 05:13:18 - 05:36:42 -1551
Gimple 05:25:00 -17.9 AT Up 24.3 148.4 Low 05:13:18 - 05:36:42 -1595
Greenville 05:25:00 -17.9 AT Up 24.2 148.3 Low 05:13:18 - 05:36:42 -1597
Reno 05:24:57 -18.9 Dark Up 25.2 149.2 Low 05:13:15 - 05:36:39 -1605
Portola 05:24:59 -18.4 Dark Up 24.7 148.7 Low 05:13:17 - 05:36:41 -1605
Quincy 05:25:00 -18.1 Dark Up 24.4 148.3 Low 05:13:18 - 05:36:42 -1611
Yerington 05:24:56 -19.6 Dark Up 25.9 149.7 Low 05:13:14 - 05:36:38 -1623
Carson City 05:24:57 -19.2 Dark Up 25.5 149.2 Low 05:13:15 - 05:36:39 -1628
Hawthorne 05:24:54 -20.3 Dark Up 26.5 150.1 Low 05:13:12 - 05:36:36 -1640
Gardnerville 05:24:57 -19.4 Dark Up 25.7 149.2 Low 05:13:15 - 05:36:39 -1643
Lee Vining 05:24:56 -20.5 Dark Up 26.8 149.5 Low 05:13:14 - 05:36:38 -1691
Beatty 05:24:50 -22.4 Dark Up 28.6 151.5 Low 05:13:08 - 05:36:32 -1698
Bishop 05:24:54 -21.3 Dark Up 27.6 150.0 Low 05:13:12 - 05:36:36 -1712
Patrick 05:24:41 -25.0 Dark Up 31.0 154.0 Up 05:12:59 - 05:36:23 -1721
Laughlin/Bullhead City 05:24:43 -24.9 Dark Up 31.0 153.2 Up 05:13:01 - 05:36:25 -1758
George/Scottsdale 05:24:35 -27.3 Dark Up 33.3 155.6 Up 05:12:53 - 05:36:17 -1785
Lake Havasu City 05:24:43 -25.5 Dark Up 31.7 153.3 Up 05:13:01 - 05:36:25 -1798
Idyllwild 05:24:52 -25.0 Dark Up 31.4 150.7 Up 05:13:10 - 05:36:34 -1920
Calipatria 05:24:48 -26.1 Dark Up 32.4 151.7 Up 05:13:06 - 05:36:30 -1932
Yuma 05:24:45 -26.9 Dark Up 33.2 152.4 Up 05:13:03 - 05:36:27 -1938
Wildwood 05:24:58 -23.8 Dark Up 30.3 148.9 Up 05:13:16 - 05:36:40 -1950

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 129746, (2026/06/01 05:23UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  9.60  10
8Bet1Sco       16:05:26.2 -19:48:20  2.6  1.02  18
8Bet2Sco       16:05:26.7 -19:48:07  5.1  1.01  18
PPM 231101     16:02:15.2 -19:27:08  8.4  0.26  19
PPM 231124     16:02:53.9 -19:12:06  9.7  0.22  19
129746         16:01:58.3 -19:12:05 16.3        19
Positions are for J2000

Event circumstances last updated at 2024/03/21 22:31:18 UT

Marc W. Buie, Southwest Research Institute

RECON