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 05:49:48.1 +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.
Apparent brightness V=23.5

[RECON map]
Object is 42.2 AU from the Sun and 41.3 AU from the Earth.
Apparent velocity is 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 476 seconds.
The 1-sigma cross-track error in the shadow position is 1919 km.
The sky-plane scale is 29932.3 km/arcsec.

The object has an absolute magnitude Hv=7.2
Diameter=229.1 km assuming a 5% albedo -- 9.0 sec chord
Diameter=93.5 km assuming a 30% albedo -- 3.7 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 1.9 sigma about the mid-time.
The median site spacing is 32.4 km RECON observability=1.0 and success probability=8.6%

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	12:22:24	-29.8	Dark	Down	40.7	247.8	Up	12:07:24 - 12:37:24	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
Okanogan	12:22:21	-29.8	Dark	Down	41.2	248.7	Up	12:07:21 - 12:37:21	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	12:22:20	-30.3	Dark	Down	42.0	248.7	Up	12:07:20 - 12:37:20	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	12:22:18	-30.4	Dark	Down	42.4	249.6	Up	12:07:18 - 12:37:18	4570
PNWRO	12:22:14	-29.3	Dark	Down	41.5	251.2	Up	12:07:14 - 12:37:14	4556
The Dalles	12:22:19	-30.9	Dark	Down	43.2	249.5	Up	12:07:19 - 12:37:19	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	12:22:16	-31.0	Dark	Down	43.8	250.7	Up	12:07:16 - 12:37:16	4338
Oregon Observatory	12:22:16	-31.1	Dark	Down	43.9	250.8	Up	12:07:16 - 12:37:16	4319
Dunrhomin	12:21:32	-18.8	Dark	Down	32.9	266.3	Up	12:06:32 - 12:36:32	4247
Nikitin	12:21:33	-18.8	Dark	Down	33.0	266.4	Up	12:06:33 - 12:36:33	4229
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
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
Gimple	12:22:07	-30.6	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	12:22:02	-29.7	Dark	Down	44.1	256.5	Up	12:07:02 - 12:37:02	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
Lee Vining	12:21:59	-29.1	Dark	Down	43.9	258.2	Up	12:06:59 - 12:36:59	3769
Bishop	12:21:56	-28.4	Dark	Down	43.4	259.3	Up	12:06:56 - 12:36:56	3720
Beatty	12:21:50	-27.1	Dark	Down	42.3	260.9	Up	12:06:50 - 12:36:50	3700
Patrick	12:21:41	-24.6	Dark	Down	40.2	264.1	Up	12:06:41 - 12:36:41	3601
Laughlin/Bullhead City	12:21:42	-25.1	Dark	Down	40.8	263.9	Up	12:06:42 - 12:36:42	3563
Lake Havasu City	12:21:40	-24.8	Dark	Down	40.6	264.6	Up	12:06:40 - 12:36:40	3499
George/Scottsdale	12:21:33	-22.7	Dark	Down	38.7	266.7	Up	12:06:33 - 12:36:33	3467
Wildwood	12:21:50	-28.2	Dark	Down	44.2	262.2	Up	12:06:50 - 12:36:50	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 2023/01/02 00:55:41 UT

RECON