RECON: TNO occultation with 182222

Event between (182222) 00YU1 and star GA1080:01370166 with event index number of 2353373

Geocentric closest approach at 2025/11/29 12:24:42 UTC

J2000 position of star is 05:48:27.4 +18:03:19
Equinox of date position of star is 05:49:45.6 +18:03:41
Stellar brightness G=14.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 95 degrees from the moon. Moon is 63% illuminated.
TNO apparent brightness V=23.4

[RECON map]
TNO is 42.2 AU from the Sun and 41.3 AU from the Earth.
The TNO is moving 23.8 km/sec on the sky relative to the star, or, 2.9 arcsec/hr.
The 1-sigma error in the time of the event is 825 seconds.
The 1-sigma cross-track error in the shadow position is 2575 km.
The sky-plane scale is 29932.3 km/arcsec.

The TNO has an absolute magnitude Hv=7.1
Diameter=229.1 km assuming a 5% albedo -- 9.6 sec chord
Diameter=93.5 km assuming a 30% albedo -- 3.9 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 182222, (2025/11/29 12:25UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:34.5 +07:24:35  0.4 10.77  96
Alnath         05:27:55.9 +28:37:37  1.6 11.71  90
PPM 121513     05:53:55.6 +19:52:20  6.4  2.04  96
PPM 121421     05:50:15.8 +18:14:59  7.7  0.20  95
182222         05:49:58.3 +18:03:44 14.9        95
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 1.1 sigma about the mid-time.
The median site spacing is 27.6 km RECON observability=1.0 and success probability=10.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 12:22:06 -21.4 Dark Down 31.8 258.4 Up 12:07:06 - 12:37:06 5296
Kamloops 12:22:28 -30.2 Dark Down 40.7 246.1 Up 12:07:28 - 12:37:28 4965
Kelowna 12:22:24 -29.7 Dark Down 40.5 247.6 Up 12:07:24 - 12:37:24 4904
Peachland 12:22:25 -29.9 Dark Down 40.7 247.4 Up 12:07:25 - 12:37:25 4890
Summerland 12:22:24 -29.8 Dark Down 40.7 247.6 Up 12:07:24 - 12:37:24 4878
Penticton 12:22:23 -29.8 Dark Down 40.7 247.8 Up 12:07:23 - 12:37:23 4873
Oliver 12:22:23 -29.8 Dark Down 40.8 248.0 Up 12:07:23 - 12:37:23 4841
Anarchist Mountain Observatory 12:22:22 -29.7 Dark Down 40.8 248.4 Up 12:07:22 - 12:37:22 4828
Tonasket 12:22:22 -29.7 Dark Down 40.9 248.5 Up 12:07:22 - 12:37:22 4799
Okanogan 12:22:20 -29.8 Dark Down 41.2 248.7 Up 12:07:20 - 12:37:20 4766
Brewster 12:22:21 -29.9 Dark Down 41.4 248.7 Up 12:07:21 - 12:37:21 4738
Victoria 12:22:30 -32.3 Dark Down 43.4 244.8 Up 12:07:30 - 12:37:30 4732
Manson/Chelan 12:22:21 -30.2 Dark Down 41.7 248.5 Up 12:07:21 - 12:37:21 4714
Wenatchee 12:22:21 -30.3 Dark Down 42.0 248.7 Up 12:07:21 - 12:37:21 4668
Ellensburg 12:22:20 -30.5 Dark Down 42.3 248.9 Up 12:07:20 - 12:37:20 4627
Yakima 12:22:19 -30.5 Dark Down 42.4 249.2 Up 12:07:19 - 12:37:19 4588
Toppenish/White Swan 12:22:19 -30.4 Dark Down 42.4 249.6 Up 12:07:19 - 12:37:19 4570
PNWRO 12:22:15 -29.3 Dark Down 41.5 251.2 Up 12:07:15 - 12:37:15 4556
Goldendale 12:22:18 -30.7 Dark Down 42.9 249.6 Up 12:07:18 - 12:37:18 4512
The Dalles 12:22:18 -30.9 Dark Down 43.2 249.5 Up 12:07:18 - 12:37:18 4486
Maupin 12:22:17 -30.8 Dark Down 43.3 249.9 Up 12:07:17 - 12:37:17 4448
Sisters 12:22:17 -31.2 Dark Down 43.9 250.3 Up 12:07:17 - 12:37:17 4357
Bend 12:22:15 -31.0 Dark Down 43.8 250.7 Up 12:07:15 - 12:37:15 4338
Oregon Observatory 12:22:16 -31.1 Dark Down 43.9 250.8 Up 12:07:16 - 12:37:16 4319
North Lake 12:22:13 -30.7 Dark Down 43.8 251.8 Up 12:07:13 - 12:37:13 4265
Dunrhomin 12:21:33 -18.8 Dark Down 32.9 266.3 Up 12:06:33 - 12:36:33 4247
CU-SBO 12:21:33 -18.8 Dark Down 33.0 266.4 Up 12:06:33 - 12:36:33 4222
Chiloquin 12:22:14 -31.4 Dark Down 44.7 251.6 Up 12:07:14 - 12:37:14 4185
Lakeview 12:22:10 -30.3 Dark Down 43.7 253.3 Up 12:07:10 - 12:37:10 4170
Klamath Falls 12:22:13 -31.3 Dark Down 44.7 252.0 Up 12:07:13 - 12:37:13 4153
Cedarville 12:22:08 -30.1 Dark Down 43.8 254.0 Up 12:07:08 - 12:37:08 4108
Fall River/Burney 12:22:10 -31.0 Dark Down 44.8 253.4 Up 12:07:10 - 12:37:10 4042
Susanville 12:22:07 -30.4 Dark Down 44.4 254.6 Up 12:07:07 - 12:37:07 3991
Gimple 12:22:07 -30.5 Dark Down 44.7 254.7 Up 12:07:07 - 12:37:07 3960
Greenville 12:22:07 -30.6 Dark Down 44.7 254.7 Up 12:07:07 - 12:37:07 3959
Quincy 12:22:07 -30.6 Dark Down 44.8 254.9 Up 12:07:07 - 12:37:07 3939
Portola 12:22:05 -30.2 Dark Down 44.5 255.4 Up 12:07:05 - 12:37:05 3933
Reno 12:22:03 -29.7 Dark Down 44.0 256.1 Up 12:07:03 - 12:37:03 3917
Carson City 12:22:03 -29.7 Dark Down 44.1 256.5 Up 12:07:03 - 12:37:03 3881
Yerington 12:22:00 -29.2 Dark Down 43.7 257.2 Up 12:07:00 - 12:37:00 3871
Gardnerville 12:22:02 -29.6 Dark Down 44.1 256.8 Up 12:07:02 - 12:37:02 3857
Hawthorne 12:21:58 -28.7 Dark Down 43.4 258.0 Up 12:06:58 - 12:36:58 3833
Tonopah 12:21:54 -27.6 Dark Down 42.4 259.5 Up 12:06:54 - 12:36:54 3810
Lee Vining 12:21:58 -29.1 Dark Down 43.9 258.2 Up 12:06:58 - 12:36:58 3769
Bishop 12:21:55 -28.4 Dark Down 43.4 259.3 Up 12:06:55 - 12:36:55 3720
Beatty 12:21:51 -27.1 Dark Down 42.3 260.9 Up 12:06:51 - 12:36:51 3700
Indian Springs 12:21:47 -26.2 Dark Down 41.5 261.9 Up 12:06:47 - 12:36:47 3686
Henderson 12:21:45 -25.6 Dark Down 41.0 262.9 Up 12:06:45 - 12:36:45 3644
Patrick 12:21:41 -24.6 Dark Down 40.2 264.1 Up 12:06:41 - 12:36:41 3601
Kingman/Dolan Springs 12:21:41 -24.7 Dark Down 40.3 264.2 Up 12:06:41 - 12:36:41 3575
Laughlin/Bullhead City 12:21:42 -25.1 Dark Down 40.8 263.9 Up 12:06:42 - 12:36:42 3563
Mohave Valley 12:21:42 -25.1 Dark Down 40.8 264.1 Up 12:06:42 - 12:36:42 3535
Lake Havasu City 12:21:41 -24.8 Dark Down 40.6 264.6 Up 12:06:41 - 12:36:41 3499
George/Scottsdale 12:21:33 -22.7 Dark Down 38.7 266.7 Up 12:06:33 - 12:36:33 3467
Parker 12:21:40 -24.7 Dark Down 40.6 264.9 Up 12:06:40 - 12:36:40 3463
Wildwood 12:21:51 -28.2 Dark Down 44.2 262.2 Up 12:06:51 - 12:36:51 3382
Idyllwild 12:21:45 -26.6 Dark Down 42.7 263.8 Up 12:06:45 - 12:36:45 3378
Calipatria 12:21:41 -25.5 Dark Down 41.7 265.0 Up 12:06:41 - 12:36:41 3336
Yuma 12:21:38 -24.7 Dark Down 41.0 266.0 Up 12:06:38 - 12:36:38 3308

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, (2025/11/29 12:25UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 10.77  96
Alnath         05:26:17.6 +28:36:23  1.6 11.71  90
PPM 121513     05:52:23.4 +19:52:04  6.4  2.04  96
PPM 121421     05:48:44.8 +18:14:35  7.7  0.20  95
182222         05:48:27.4 +18:03:19 14.9        95
Positions are for J2000

Event circumstances last updated at 2022/04/11 23:07:06 UT

Marc W. Buie, Southwest Research Institute

RECON