RECON: TNO occultation with 534626

Event between (534626) 14UT224 and star GA1120:01130340 with event index number of 2162826

Geocentric closest approach at 2025/12/14 07:01:06 UTC

J2000 position of star is 05:22:22.6 +23:07:39
Equinox of date position of star is 05:23:43.7 +23:08:51
Stellar brightness G=14.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 118 degrees from the moon. Moon is 27% illuminated.
TNO apparent brightness V=22.2

[RECON map]
TNO is 36.3 AU from the Sun and 35.3 AU from the Earth.
The TNO is moving 24.8 km/sec on the sky relative to the star, or, 3.5 arcsec/hr.
The 1-sigma error in the time of the event is 212 seconds.
The 1-sigma cross-track error in the shadow position is 1466 km.
The sky-plane scale is 25587.6 km/arcsec.

The TNO has an absolute magnitude Hv=6.7
Diameter=280.6 km assuming a 5% albedo -- 11.3 sec chord
Diameter=114.5 km assuming a 30% albedo -- 4.6 sec chord
Dynamical classification is 2:1E
 
 
 
 
 
 

Star training set for 534626, (2025/12/14 07:01UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:24.8 +16:33:34  0.8 12.77 129
Alnath         05:27:56.1 +28:37:37  1.6  5.55 117
109 Tau        05:20:50.3 +22:07:16  4.9  1.26 119
PPM 094385     05:29:30.0 +23:18:45  8.4  1.28 117
PPM 094343     05:26:25.0 +22:59:36  9.7  0.59 118
PPM 094301     05:23:32.9 +22:58:38 10.1  0.20 118
534626         05:23:57.0 +23:09:02 14.9       118
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 4.2 sigma about the mid-time.
The median site spacing is 31.9 km RECON observability=1.0 and success probability=36.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 07:00:56 -61.1 Dark Down 61.0 183.7 Up 06:45:56 - 07:15:56 975
Kamloops 07:01:37 -60.6 Dark Down 60.8 156.2 Up 06:46:37 - 07:16:37 922
Kelowna 07:01:35 -61.6 Dark Down 61.8 157.3 Up 06:46:35 - 07:16:35 835
Peachland 07:01:36 -61.6 Dark Down 61.8 156.6 Up 06:46:36 - 07:16:36 827
Summerland 07:01:36 -61.7 Dark Down 62.0 156.7 Up 06:46:36 - 07:16:36 811
Penticton 07:01:35 -61.8 Dark Down 62.1 156.9 Up 06:46:35 - 07:16:35 804
Oliver 07:01:36 -62.1 Dark Down 62.4 156.6 Up 06:46:36 - 07:16:36 769
Anarchist Mountain Observatory 07:01:36 -62.4 Dark Down 62.6 156.8 Up 06:46:36 - 07:16:36 751
Victoria 07:01:47 -61.5 Dark Down 61.8 148.9 Up 06:46:47 - 07:16:47 743
Tonasket 07:01:36 -62.6 Dark Down 62.9 156.5 Up 06:46:36 - 07:16:36 721
Okanogan 07:01:37 -62.9 Dark Down 63.1 155.9 Up 06:46:37 - 07:16:37 689
Brewster 07:01:37 -63.1 Dark Down 63.3 155.3 Up 06:46:37 - 07:16:37 664
Manson/Chelan 07:01:39 -63.1 Dark Down 63.4 154.4 Up 06:46:39 - 07:16:39 647
Wenatchee 07:01:40 -63.5 Dark Down 63.8 153.7 Up 06:46:40 - 07:16:40 601
Ellensburg 07:01:41 -63.8 Dark Down 64.1 152.9 Up 06:46:41 - 07:16:41 562
Yakima 07:01:41 -64.1 Dark Down 64.5 152.4 Up 06:46:41 - 07:16:41 522
Toppenish/White Swan 07:01:41 -64.4 Dark Down 64.7 152.6 Up 06:46:41 - 07:16:41 498
Goldendale 07:01:42 -64.7 Dark Down 65.1 151.2 Up 06:46:42 - 07:16:42 447
PNWRO 07:01:37 -65.2 Dark Down 65.5 155.3 Up 06:46:37 - 07:16:37 446
The Dalles 07:01:44 -64.8 Dark Down 65.1 150.2 Up 06:46:44 - 07:16:44 428
Maupin 07:01:44 -65.2 Dark Down 65.5 150.0 Up 06:46:44 - 07:16:44 385
Sisters 07:01:46 -65.7 Dark Down 66.1 147.9 Up 06:46:46 - 07:16:46 301
Bend 07:01:46 -66.0 Dark Down 66.4 148.2 Up 06:46:46 - 07:16:46 274
Oregon Observatory 07:01:46 -66.1 Dark Down 66.5 147.7 Up 06:46:46 - 07:16:46 257
North Lake 07:01:45 -66.8 Dark Down 67.3 148.1 Up 06:46:45 - 07:16:45 186
Chiloquin 07:01:49 -67.0 Dark Down 67.4 145.1 Up 06:46:49 - 07:16:49 127
Klamath Falls 07:01:49 -67.3 Dark Down 67.8 144.8 Up 06:46:49 - 07:16:49 91
Lakeview 07:01:44 -67.9 Dark Down 68.4 147.9 Up 06:46:44 - 07:16:44 71
Cedarville 07:01:44 -68.5 Dark Down 69.0 147.4 Up 06:46:44 - 07:16:44 1
Fall River/Burney 07:01:49 -68.4 Dark Down 68.9 144.0 Up 06:46:49 - 07:16:49 -36
Susanville 07:01:47 -69.2 Dark Down 69.7 144.7 Up 06:46:47 - 07:16:47 -110
Greenville 07:01:48 -69.3 Dark Down 69.8 143.5 Up 06:46:48 - 07:16:48 -135
Gimple 07:01:48 -69.3 Dark Down 69.8 143.7 Up 06:46:48 - 07:16:48 -137
Quincy 07:01:48 -69.5 Dark Down 70.0 143.2 Up 06:46:48 - 07:16:48 -157
Portola 07:01:47 -69.8 Dark Down 70.3 144.1 Up 06:46:47 - 07:16:47 -175
Reno 07:01:45 -70.3 Dark Down 70.8 145.2 Up 06:46:45 - 07:16:45 -210
Dunrhomin 07:00:55 -72.9 Dark Down 72.7 188.3 Up 06:45:55 - 07:15:55 -235
Carson City 07:01:45 -70.6 Dark Down 71.1 144.7 Up 06:46:45 - 07:16:45 -248
CU-SBO 07:00:55 -73.2 Dark Down 73.0 188.1 Up 06:45:55 - 07:15:55 -262
Gardnerville 07:01:45 -70.8 Dark Down 71.3 144.4 Up 06:46:45 - 07:16:45 -275
Yerington 07:01:43 -71.0 Dark Down 71.5 146.0 Up 06:46:43 - 07:16:43 -276
Hawthorne 07:01:41 -71.7 Dark Down 72.1 146.5 Up 06:46:41 - 07:16:41 -331
Lee Vining 07:01:43 -71.9 Dark Down 72.4 144.3 Up 06:46:43 - 07:16:43 -385
Tonopah 07:01:37 -72.7 Dark Down 73.1 149.6 Up 06:46:37 - 07:16:37 -394
Bishop 07:01:41 -72.7 Dark Down 73.2 145.1 Up 06:46:41 - 07:16:41 -456
Beatty 07:01:36 -73.8 Dark Down 74.3 148.9 Up 06:46:36 - 07:16:36 -522
Indian Springs 07:01:33 -74.6 Dark Down 75.0 151.6 Up 06:46:33 - 07:16:33 -567
Henderson 07:01:30 -75.3 Dark Down 75.7 153.0 Up 06:46:30 - 07:16:30 -631
Patrick 07:01:27 -76.3 Dark Down 76.7 155.8 Up 06:46:27 - 07:16:27 -708
Laughlin/Bullhead City 07:01:29 -76.2 Dark Down 76.7 152.8 Up 06:46:29 - 07:16:29 -728
Kingman/Dolan Springs 07:01:27 -76.4 Dark Down 76.8 154.7 Up 06:46:27 - 07:16:27 -730
Mohave Valley 07:01:30 -76.5 Dark Down 76.9 152.3 Up 06:46:30 - 07:16:30 -758
Lake Havasu City 07:01:29 -76.9 Dark Down 77.4 152.4 Up 06:46:29 - 07:16:29 -803
Wildwood 07:01:45 -75.0 Dark Down 75.7 137.1 Up 06:46:45 - 07:16:45 -805
Parker 07:01:29 -77.2 Dark Down 77.7 151.7 Up 06:46:29 - 07:16:29 -842
Idyllwild 07:01:38 -76.3 Dark Down 76.9 142.1 Up 06:46:38 - 07:16:38 -863
George/Scottsdale 07:01:20 -78.6 Dark Down 78.9 161.1 Up 06:46:20 - 07:16:20 -907
Calipatria 07:01:34 -77.4 Dark Down 78.0 144.6 Up 06:46:34 - 07:16:34 -941
Yuma 07:01:31 -78.2 Dark Down 78.8 146.9 Up 06:46:31 - 07:16:31 -996

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 534626, (2025/12/14 07:01UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 12.77 129
Alnath         05:26:17.6 +28:36:23  1.6  5.55 117
109 Tau        05:19:16.6 +22:05:46  4.9  1.26 119
PPM 094385     05:27:55.4 +23:17:34  8.4  1.28 117
PPM 094343     05:24:50.7 +22:58:19  9.7  0.59 118
PPM 094301     05:21:58.6 +22:57:14 10.1  0.20 118
534626         05:22:22.6 +23:07:39 14.9       118
Positions are for J2000

Event circumstances last updated at 2022/04/11 23:10:43 UT

Marc W. Buie, Southwest Research Institute

RECON