RECON: TNO occultation with 523733

Event between (523733) 14PR70 and star GA1200:02293228 with event index number of 2308568

Geocentric closest approach at 2026/12/22 07:07:36 UTC

J2000 position of star is 06:07:30.0 +30:45:59
Equinox of date position of star is 06:08:55.8 +30:45:43
Stellar brightness G=16.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 26 degrees from the moon. Moon is 95% illuminated.
TNO apparent brightness V=23.1

[RECON map]
TNO is 18.8 AU from the Sun and 17.8 AU from the Earth.
The TNO is moving 22.2 km/sec on the sky relative to the star, or, 6.2 arcsec/hr.
The 1-sigma error in the time of the event is 106 seconds.
The 1-sigma cross-track error in the shadow position is 648 km.
The sky-plane scale is 12903.6 km/arcsec.

The TNO has an absolute magnitude Hv=10.4
Diameter=50.4 km assuming a 5% albedo -- 2.2 sec chord
Diameter=20.6 km assuming a 30% albedo -- 0.9 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 523733, (2026/12/22 07:08UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:58.0 +27:57:32  1.1 21.43  48
Alnath         05:28:00.0 +28:37:40  1.6  9.20  17
PPM 071108     06:02:54.6 +31:01:59  6.0  1.38  25
PPM 071271     06:10:51.5 +31:15:32  8.1  0.61  27
PPM 071244     06:09:27.5 +30:40:51 10.0  0.09  26
523733         06:09:14.4 +30:45:40 16.0        27
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 32.4 km RECON observability=1.0 and success probability=62.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 07:07:38 -61.3 Dark Up 68.7 179.9 Up 06:58:16 - 07:17:00 1698
Kamloops 07:08:23 -61.0 Dark Up 67.4 146.5 Up 06:59:01 - 07:17:45 1620
Kelowna 07:08:21 -62.0 Dark Up 68.4 147.2 Up 06:58:59 - 07:17:43 1528
Peachland 07:08:22 -62.0 Dark Up 68.4 146.5 Up 06:59:00 - 07:17:44 1519
Summerland 07:08:22 -62.1 Dark Up 68.6 146.4 Up 06:59:00 - 07:17:44 1502
Penticton 07:08:22 -62.2 Dark Up 68.7 146.6 Up 06:59:00 - 07:17:44 1494
Oliver 07:08:22 -62.6 Dark Up 69.0 146.1 Up 06:59:00 - 07:17:44 1458
Anarchist Mountain Observatory 07:08:21 -62.8 Dark Up 69.2 146.3 Up 06:58:59 - 07:17:43 1438
Victoria 07:08:35 -61.9 Dark Up 67.9 137.2 Up 06:59:13 - 07:17:57 1428
Tonasket 07:08:22 -63.0 Dark Up 69.4 145.7 Up 06:59:00 - 07:17:44 1407
Okanogan 07:08:23 -63.3 Dark Up 69.6 144.8 Up 06:59:01 - 07:17:45 1373
Brewster 07:08:24 -63.5 Dark Up 69.8 143.9 Up 06:59:02 - 07:17:46 1346
Manson/Chelan 07:08:25 -63.6 Dark Up 69.8 142.8 Up 06:59:03 - 07:17:47 1328
Wenatchee 07:08:26 -63.9 Dark Up 70.1 141.6 Up 06:59:04 - 07:17:48 1279
Ellensburg 07:08:27 -64.2 Dark Up 70.3 140.4 Up 06:59:05 - 07:17:49 1238
Yakima 07:08:28 -64.6 Dark Up 70.6 139.7 Up 06:59:06 - 07:17:50 1195
Toppenish/White Swan 07:08:27 -64.8 Dark Up 70.9 139.7 Up 06:59:05 - 07:17:49 1171
PNWRO 07:08:23 -65.6 Dark Up 71.8 142.4 Up 06:59:01 - 07:17:45 1117
Goldendale 07:08:29 -65.2 Dark Up 71.1 137.7 Up 06:59:07 - 07:17:51 1117
The Dalles 07:08:31 -65.2 Dark Up 71.1 136.4 Up 06:59:09 - 07:17:53 1097
Maupin 07:08:31 -65.6 Dark Up 71.4 135.8 Up 06:59:09 - 07:17:53 1051
Sisters 07:08:33 -66.2 Dark Up 71.8 132.8 Up 06:59:11 - 07:17:55 963
Bend 07:08:33 -66.5 Dark Up 72.1 132.9 Up 06:59:11 - 07:17:55 935
Oregon Observatory 07:08:33 -66.6 Dark Up 72.2 132.2 Up 06:59:11 - 07:17:55 918
North Lake 07:08:32 -67.3 Dark Up 72.9 131.9 Up 06:59:10 - 07:17:54 843
Chiloquin 07:08:36 -67.5 Dark Up 72.8 128.1 Up 06:59:14 - 07:17:58 781
Klamath Falls 07:08:36 -67.8 Dark Up 73.0 127.4 Up 06:59:14 - 07:17:58 744
Lakeview 07:08:31 -68.4 Dark Up 73.9 130.5 Up 06:59:09 - 07:17:53 724
Cedarville 07:08:31 -69.0 Dark Up 74.4 129.1 Up 06:59:09 - 07:17:53 651
Fall River/Burney 07:08:36 -68.9 Dark Up 74.0 125.0 Up 06:59:14 - 07:17:58 612
Susanville 07:08:33 -69.7 Dark Up 74.8 124.8 Up 06:59:11 - 07:17:55 536
Greenville 07:08:35 -69.8 Dark Up 74.8 123.3 Up 06:59:13 - 07:17:57 509
Gimple 07:08:34 -69.9 Dark Up 74.8 123.5 Up 06:59:12 - 07:17:56 508
Quincy 07:08:35 -70.0 Dark Up 74.9 122.7 Up 06:59:13 - 07:17:57 487
Portola 07:08:33 -70.3 Dark Up 75.2 123.3 Up 06:59:11 - 07:17:55 468
Dunrhomin 07:07:36 -73.1 Dark Up 80.5 183.7 Up 06:58:14 - 07:16:58 433
Reno 07:08:31 -70.8 Dark Up 75.8 123.9 Up 06:59:09 - 07:17:53 432
CU-SBO 07:07:36 -73.3 Dark Up 80.7 183.3 Up 06:58:14 - 07:16:58 405
Carson City 07:08:31 -71.1 Dark Up 76.0 122.8 Up 06:59:09 - 07:17:53 393
Gardnerville 07:08:31 -71.3 Dark Up 76.2 122.1 Up 06:59:09 - 07:17:53 366
Yerington 07:08:29 -71.6 Dark Up 76.5 123.6 Up 06:59:07 - 07:17:51 365
Hawthorne 07:08:27 -72.2 Dark Up 77.1 123.3 Up 06:59:05 - 07:17:49 309
Lee Vining 07:08:30 -72.4 Dark Up 77.1 120.0 Up 06:59:08 - 07:17:52 252
Tonopah 07:08:22 -73.2 Dark Up 78.3 125.2 Up 06:59:00 - 07:17:44 245
Bishop 07:08:27 -73.2 Dark Up 77.9 119.4 Up 06:59:05 - 07:17:49 180
Beatty 07:08:21 -74.3 Dark Up 79.2 121.6 Up 06:58:59 - 07:17:43 114
Indian Springs 07:08:17 -75.1 Dark Up 80.1 123.2 Up 06:58:55 - 07:17:39 69
Henderson 07:08:15 -75.8 Dark Up 80.9 122.7 Up 06:58:53 - 07:17:37 4
Patrick 07:08:10 -76.8 Dark Up 82.0 123.1 Up 06:58:48 - 07:17:32 -73
Laughlin/Bullhead City 07:08:13 -76.7 Dark Up 81.6 119.2 Up 06:58:51 - 07:17:35 -95
Kingman/Dolan Springs 07:08:11 -76.9 Dark Up 82.0 121.1 Up 06:58:49 - 07:17:33 -96
Mohave Valley 07:08:13 -77.0 Dark Up 81.7 117.6 Up 06:58:51 - 07:17:35 -125
Lake Havasu City 07:08:13 -77.4 Dark Up 82.1 115.8 Up 06:58:51 - 07:17:35 -171
Wildwood 07:08:30 -75.6 Dark Up 79.0 104.1 Up 06:59:08 - 07:17:52 -177
Parker 07:08:13 -77.7 Dark Up 82.3 113.6 Up 06:58:51 - 07:17:35 -210
Idyllwild 07:08:23 -76.9 Dark Up 80.5 105.4 Up 06:59:01 - 07:17:45 -235
George/Scottsdale 07:08:03 -79.0 Dark Up 84.2 119.2 Up 06:58:41 - 07:17:25 -272
Calipatria 07:08:18 -78.0 Dark Up 81.6 103.8 Up 06:58:56 - 07:17:40 -313
Yuma 07:08:15 -78.8 Dark Up 82.5 102.5 Up 06:58:53 - 07:17:37 -367

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 523733, (2026/12/22 07:08UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 21.43  48
Alnath         05:26:17.6 +28:36:23  1.6  9.20  17
PPM 071108     06:01:10.0 +31:02:04  6.0  1.38  25
PPM 071271     06:09:06.7 +31:15:55  8.1  0.61  27
PPM 071244     06:07:43.2 +30:41:11 10.0  0.09  26
523733         06:07:30.0 +30:45:59 16.0        26
Positions are for J2000

Event circumstances last updated at 2022/03/03 01:33:41 UT

Marc W. Buie, Southwest Research Institute

RECON