RECON: TNO occultation with 182222

Event between (182222) 00YU1 and star GA1080:01487460 with event index number of 2353479

Geocentric closest approach at 2026/11/16 08:36:16 UTC

J2000 position of star is 05:55:11.8 +18:01:21
Equinox of date position of star is 05:56:30.1 +18:01:29
Stellar brightness G=15.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 137 degrees from the moon. Moon is 39% illuminated.
TNO apparent brightness V=23.4

[RECON map]
TNO is 42.1 AU from the Sun and 41.3 AU from the Earth.
The TNO is moving 20.2 km/sec on the sky relative to the star, or, 2.4 arcsec/hr.
The 1-sigma error in the time of the event is 1139 seconds.
The 1-sigma cross-track error in the shadow position is 1770 km.
The sky-plane scale is 29953.2 km/arcsec.

The TNO has an absolute magnitude Hv=7.1
Diameter=229.1 km assuming a 5% albedo -- 11.3 sec chord
Diameter=93.5 km assuming a 30% albedo -- 4.6 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 182222, (2026/11/16 08:36UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:37.7 +07:24:35  0.4 10.62 134
Alhena         06:39:15.8 +16:22:26  1.9 10.28 147
57 Ori         05:56:32.1 +19:45:08  5.6  1.73 137
PPM 121579     05:56:28.9 +18:15:29  8.5  0.24 137
182222         05:56:46.1 +18:01:30 15.5       137
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 24.0 km RECON observability=1.0 and success probability=25.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 08:37:23 -56.5 Dark Down 52.0 140.4 Up 08:22:23 - 08:52:23 -314
Sleaford 08:36:35 -50.5 Dark Down 55.0 163.0 Up 08:21:35 - 08:51:35 -372
Kelowna 08:37:22 -57.0 Dark Down 53.0 141.0 Up 08:22:22 - 08:52:22 -399
Peachland 08:37:23 -57.2 Dark Down 53.0 140.4 Up 08:22:23 - 08:52:23 -404
Summerland 08:37:23 -57.3 Dark Down 53.1 140.5 Up 08:22:23 - 08:52:23 -419
Penticton 08:37:23 -57.4 Dark Down 53.2 140.6 Up 08:22:23 - 08:52:23 -426
Oliver 08:37:24 -57.7 Dark Down 53.5 140.3 Up 08:22:24 - 08:52:24 -458
Anarchist Mountain Observatory 08:37:23 -57.8 Dark Down 53.7 140.4 Up 08:22:23 - 08:52:23 -476
Tonasket 08:37:24 -58.1 Dark Down 53.9 140.0 Up 08:22:24 - 08:52:24 -503
Victoria 08:37:25 -59.2 Dark Down 52.3 134.3 Up 08:22:25 - 08:52:25 -516
Okanogan 08:37:25 -58.4 Dark Down 54.1 139.5 Up 08:22:25 - 08:52:25 -531
Brewster 08:37:25 -58.7 Dark Down 54.2 139.0 Up 08:22:25 - 08:52:25 -553
Manson/Chelan 08:37:25 -59.0 Dark Down 54.2 138.2 Up 08:22:25 - 08:52:25 -568
Wenatchee 08:37:25 -59.5 Dark Down 54.5 137.6 Up 08:22:25 - 08:52:25 -612
Ellensburg 08:37:25 -59.9 Dark Down 54.7 136.8 Up 08:22:25 - 08:52:25 -651
Yakima 08:37:25 -60.3 Dark Down 55.0 136.4 Up 08:22:25 - 08:52:25 -691
Toppenish/White Swan 08:37:25 -60.5 Dark Down 55.2 136.5 Up 08:22:25 - 08:52:25 -713
PNWRO 08:37:25 -60.3 Dark Down 56.2 138.3 Up 08:22:25 - 08:52:25 -759
Goldendale 08:37:25 -61.1 Dark Down 55.4 135.3 Up 08:22:25 - 08:52:25 -768
The Dalles 08:37:25 -61.4 Dark Down 55.4 134.5 Up 08:22:25 - 08:52:25 -791
Maupin 08:37:25 -61.7 Dark Down 55.7 134.2 Up 08:22:25 - 08:52:25 -833
Sisters 08:37:25 -62.7 Dark Down 56.1 132.6 Up 08:22:25 - 08:52:25 -926
Bend 08:37:25 -62.8 Dark Down 56.4 132.7 Up 08:22:25 - 08:52:25 -948
Oregon Observatory 08:37:25 -63.0 Dark Down 56.4 132.3 Up 08:22:25 - 08:52:25 -967
North Lake 08:37:25 -63.4 Dark Down 57.2 132.4 Up 08:22:25 - 08:52:25 -1029
Chiloquin 08:37:45 -64.3 Dark Down 57.1 130.3 Up 08:22:45 - 08:52:45 -1030
Klamath Falls 08:37:45 -64.6 Dark Down 57.4 130.1 Up 08:22:45 - 08:52:45 -1064
Lakeview 08:37:25 -64.2 Dark Down 58.2 131.9 Up 08:22:25 - 08:52:25 -1136
Fall River/Burney 08:37:46 -65.5 Dark Down 58.4 129.2 Up 08:22:46 - 08:52:46 -1184
Cedarville 08:37:25 -64.7 Dark Down 58.7 131.4 Up 08:22:25 - 08:52:25 -1204
Susanville 08:37:45 -65.8 Dark Down 59.2 129.4 Up 08:22:45 - 08:52:45 -1259
Greenville 08:37:47 -66.2 Dark Down 59.2 128.6 Up 08:22:47 - 08:52:47 -1280
Gimple 08:37:46 -66.1 Dark Down 59.3 128.8 Up 08:22:46 - 08:52:46 -1282
Quincy 08:37:47 -66.3 Dark Down 59.3 128.4 Up 08:22:47 - 08:52:47 -1300
Portola 08:37:45 -66.2 Dark Down 59.7 128.9 Up 08:22:45 - 08:52:45 -1321
Carson City 08:37:44 -66.5 Dark Down 60.5 129.0 Up 08:22:44 - 08:52:44 -1395
Reno 08:37:25 -66.2 Dark Down 60.2 129.4 Up 08:22:25 - 08:52:25 -1410
Gardnerville 08:37:45 -66.7 Dark Down 60.7 128.8 Up 08:22:45 - 08:52:45 -1420
Yerington 08:37:25 -66.4 Dark Down 60.9 129.6 Up 08:22:25 - 08:52:25 -1466
Dunrhomin 08:36:45 -57.9 Dark Down 66.4 157.4 Up 08:21:45 - 08:51:45 -1513
Hawthorne 08:37:25 -66.6 Dark Down 61.6 129.8 Up 08:22:25 - 08:52:25 -1515
Lee Vining 08:37:43 -67.2 Dark Down 61.7 128.3 Up 08:22:43 - 08:52:43 -1528
CU-SBO 08:36:46 -58.1 Dark Down 66.6 156.9 Up 08:21:46 - 08:51:46 -1537
Tonopah 08:37:25 -66.2 Dark Down 62.7 131.3 Up 08:22:25 - 08:52:25 -1569
Bishop 08:37:25 -67.4 Dark Down 62.4 128.4 Up 08:22:25 - 08:52:25 -1638
Beatty 08:37:25 -66.9 Dark Down 63.7 130.4 Up 08:22:25 - 08:52:25 -1693
Indian Springs 08:37:25 -66.5 Dark Down 64.6 131.7 Up 08:22:25 - 08:52:25 -1736
Henderson 08:37:25 -66.4 Dark Down 65.4 132.0 Up 08:22:25 - 08:52:25 -1799
Patrick 08:37:25 -66.2 Dark Down 66.5 133.0 Up 08:22:25 - 08:52:25 -1879
Laughlin/Bullhead City 08:37:25 -66.8 Dark Down 66.2 131.3 Up 08:22:25 - 08:52:25 -1895
Kingman/Dolan Springs 08:37:25 -66.4 Dark Down 66.5 132.3 Up 08:22:25 - 08:52:25 -1899
Mohave Valley 08:37:25 -66.9 Dark Down 66.4 130.8 Up 08:22:25 - 08:52:25 -1923
Wildwood 08:37:49 -69.9 Dark Down 64.3 123.0 Up 08:22:49 - 08:52:49 -1929
Lake Havasu City 08:37:25 -67.0 Dark Down 66.8 130.6 Up 08:22:25 - 08:52:25 -1968
Parker 08:37:25 -67.2 Dark Down 67.1 130.0 Up 08:22:25 - 08:52:25 -2005
Idyllwild 08:37:25 -69.0 Dark Down 65.7 125.1 Up 08:22:25 - 08:52:25 -2027
George/Scottsdale 08:37:21 -65.8 Dark Down 68.8 133.9 Up 08:22:21 - 08:52:21 -2087
Calipatria 08:37:25 -68.7 Dark Down 66.9 126.0 Up 08:22:25 - 08:52:25 -2100
Yuma 08:37:25 -68.3 Dark Down 67.7 126.7 Up 08:22:25 - 08:52:25 -2154

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 182222, (2026/11/16 08:36UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 10.62 134
Alhena         06:37:42.8 +16:23:57  1.9 10.28 147
57 Ori         05:54:56.6 +19:44:58  5.6  1.73 137
PPM 121579     05:54:54.5 +18:15:19  8.5  0.24 137
182222         05:55:11.8 +18:01:21 15.5       137
Positions are for J2000

Event circumstances last updated at 2022/04/24 23:02:58 UT

Marc W. Buie, Southwest Research Institute

RECON