RECON: TNO occultation with 590218

Event between (590218) 11UD63 and star GA1180:01749172 with event index number of 2685715

Geocentric closest approach at 2026/12/19 06:08:33 UTC

J2000 position of star is 05:45:36.4 +29:34:41
Equinox of date position of star is 05:47:08.1 +29:35:09
Stellar brightness G=16.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 65 degrees from the moon. Moon is 71% illuminated.
Apparent brightness V=20.1

[RECON map]
Object is 14.2 AU from the Sun and 13.2 AU from the Earth.
Apparent velocity is 22.3 km/sec on the sky relative to the star, or, 8.4 arcsec/hr.
The 1-sigma error in the time of the event is 85 seconds.
The 1-sigma cross-track error in the shadow position is 536 km.
The sky-plane scale is 9573.1 km/arcsec.

The object has an absolute magnitude Hv=8.7
Diameter=105.2 km assuming a 5% albedo -- 4.8 sec chord
Diameter=42.9 km assuming a 30% albedo -- 2.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 590218, (2026/12/19 06:08UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:28.3 +16:33:41  0.8 20.63  49
Alnath         05:27:59.9 +28:37:40  1.6  4.33  61
PPM 094619     05:41:01.3 +29:13:41  5.9  1.42  63
PPM 094804     05:47:14.8 +29:18:27  8.0  0.28  65
590218         05:47:19.8 +29:35:13 16.8        65
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 26.4 km RECON observability=1.0 and success probability=99.6%

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
Kamloops	06:09:46	-55.6	Dark	Up	61.1	126.8	Up	06:02:13 - 06:17:20	991
Kelowna	06:09:46	-56.5	Dark	Up	62.0	126.9	Up	06:02:12 - 06:17:19	895
Sleaford	06:09:03	-59.7	Dark	Up	65.8	153.4	Up	06:01:29 - 06:16:36	891
Peachland	06:09:47	-56.5	Dark	Up	61.9	126.3	Up	06:02:13 - 06:17:20	890
Summerland	06:09:47	-56.6	Dark	Up	62.1	126.2	Up	06:02:13 - 06:17:20	874
Penticton	06:09:46	-56.7	Dark	Up	62.2	126.2	Up	06:02:13 - 06:17:20	865
Victoria	06:10:00	-55.4	Dark	Up	60.6	119.3	Up	06:02:26 - 06:17:33	851
Oliver	06:09:47	-57.0	Dark	Up	62.4	125.7	Up	06:02:14 - 06:17:21	831
Anarchist Mountain Observatory	06:09:47	-57.2	Dark	Up	62.6	125.7	Up	06:02:13 - 06:17:20	810
Okanogan	06:09:49	-57.5	Dark	Up	62.8	124.4	Up	06:02:15 - 06:17:22	751
Brewster	06:09:50	-57.6	Dark	Up	62.9	123.7	Up	06:02:16 - 06:17:23	729
Manson/Chelan	06:09:51	-57.5	Dark	Up	62.8	122.8	Up	06:02:18 - 06:17:25	716
Wenatchee	06:09:53	-57.7	Dark	Up	62.9	121.8	Up	06:02:19 - 06:17:26	673
Ellensburg	06:09:55	-57.9	Dark	Up	63.0	120.8	Up	06:02:21 - 06:17:28	637
Yakima	06:09:55	-58.1	Dark	Up	63.2	120.1	Up	06:02:22 - 06:17:29	598
Toppenish/White Swan	06:09:55	-58.3	Dark	Up	63.4	119.9	Up	06:02:22 - 06:17:29	572
The Dalles	06:09:59	-58.3	Dark	Up	63.3	117.5	Up	06:02:25 - 06:17:32	513
PNWRO	06:09:51	-59.4	Dark	Up	64.5	121.4	Up	06:02:18 - 06:17:25	503
Maupin	06:10:00	-58.6	Dark	Up	63.6	116.9	Up	06:02:26 - 06:17:33	469
Sisters	06:10:03	-58.8	Dark	Up	63.7	114.7	Up	06:02:29 - 06:17:36	393
Bend	06:10:02	-59.1	Dark	Up	63.9	114.5	Up	06:02:29 - 06:17:36	363
Oregon Observatory	06:10:03	-59.1	Dark	Up	63.9	114.1	Up	06:02:30 - 06:17:37	349
Chiloquin	06:10:07	-59.6	Dark	Up	64.2	111.1	Up	06:02:33 - 06:17:40	226
Klamath Falls	06:10:07	-59.8	Dark	Up	64.3	110.5	Up	06:02:34 - 06:17:41	190
Cedarville	06:10:04	-61.2	Dark	Up	65.7	111.1	Up	06:02:30 - 06:17:37	80
Fall River/Burney	06:10:08	-60.6	Dark	Up	65.0	108.6	Up	06:02:35 - 06:17:42	61
Greenville	06:10:09	-61.3	Dark	Up	65.6	107.2	Up	06:02:35 - 06:17:42	-43
Gimple	06:10:08	-61.4	Dark	Up	65.7	107.3	Up	06:02:35 - 06:17:42	-46
Quincy	06:10:09	-61.4	Dark	Up	65.7	106.8	Up	06:02:35 - 06:17:42	-64
Portola	06:10:08	-61.8	Dark	Up	66.1	107.1	Up	06:02:34 - 06:17:41	-89
Reno	06:10:06	-62.4	Dark	Up	66.6	107.3	Up	06:02:32 - 06:17:39	-132
Carson City	06:10:06	-62.6	Dark	Up	66.7	106.5	Up	06:02:33 - 06:17:40	-170
Gardnerville	06:10:07	-62.7	Dark	Up	66.8	106.0	Up	06:02:33 - 06:17:40	-196
Yerington	06:10:05	-63.1	Dark	Up	67.3	106.8	Up	06:02:31 - 06:17:38	-206
Hawthorne	06:10:04	-63.7	Dark	Up	67.8	106.3	Up	06:02:30 - 06:17:37	-267
Lee Vining	06:10:06	-63.6	Dark	Up	67.6	104.4	Up	06:02:33 - 06:17:40	-313
Dunrhomin	06:09:14	-70.3	Dark	Up	75.8	135.4	Up	06:01:40 - 06:16:47	-348
Nikitin	06:09:14	-70.5	Dark	Up	76.0	134.8	Up	06:01:40 - 06:16:47	-367
CU-SBO	06:09:14	-70.5	Dark	Up	76.0	134.4	Up	06:01:41 - 06:16:48	-373
Bishop	06:10:05	-64.4	Dark	Up	68.3	103.8	Up	06:02:31 - 06:17:38	-394
Beatty	06:10:00	-65.7	Dark	Up	69.6	104.4	Up	06:02:26 - 06:17:33	-481
Patrick	06:09:51	-68.5	Dark	Up	72.2	103.5	Up	06:02:18 - 06:17:25	-704
Laughlin/Bullhead City	06:09:54	-68.1	Dark	Up	71.7	102.0	Up	06:02:21 - 06:17:28	-715
Wildwood	06:10:11	-65.5	Dark	Up	68.7	95.4	Up	06:02:37 - 06:17:44	-732
Lake Havasu City	06:09:54	-68.5	Dark	Up	72.1	100.3	Up	06:02:21 - 06:17:28	-792
Idyllwild	06:10:04	-67.1	Dark	Up	70.3	95.9	Up	06:02:31 - 06:17:38	-817
Calipatria	06:10:00	-68.2	Dark	Up	71.3	95.1	Up	06:02:27 - 06:17:34	-910
George/Scottsdale	06:09:46	-70.7	Dark	Up	74.2	100.3	Up	06:02:12 - 06:17:19	-929
Yuma	06:09:58	-69.0	Dark	Up	72.1	94.5	Up	06:02:24 - 06:17:31	-977

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 590218, (2026/12/19 06:08UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 20.63  49
Alnath         05:26:17.6 +28:36:23  1.6  4.33  61
PPM 094619     05:39:18.3 +29:12:54  5.9  1.42  63
PPM 094804     05:45:31.7 +29:17:55  8.0  0.28  65
590218         05:45:36.4 +29:34:41 16.8        65
Positions are for J2000

Event circumstances last updated at 2023/12/07 04:33:50 UT

RECON