RECON: TNO occultation with 523776

Event between (523776) 14YB50 and star GA1200:03283283 with event index number of 2354086

Geocentric closest approach at 2026/12/21 12:07:47 UTC

J2000 position of star is 09:26:01.8 +30:57:51
Equinox of date position of star is 09:27:28.3 +30:51:31
Stellar brightness G=11.6, use SENSEUP=8 with the MallinCam and and exposure time of 125 milli-seconds with the QHY174 camera.
Star is 79 degrees from the moon. Moon is 90% illuminated.
Apparent brightness V=21.8

[RECON map]
Object is 37.7 AU from the Sun and 37.0 AU from the Earth.
Apparent velocity is 18.6 km/sec on the sky relative to the star, or, 2.5 arcsec/hr.
The 1-sigma error in the time of the event is 114 seconds.
The 1-sigma cross-track error in the shadow position is 1864 km.
The sky-plane scale is 26821.6 km/arcsec.

The object has an absolute magnitude Hv=6.0
Diameter=369.8 km assuming a 5% albedo -- 20.5 sec chord
Diameter=151.0 km assuming a 30% albedo -- 8.4 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 523776, (2026/12/21 12:06UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:48.4 +11:50:04  1.3 21.37  96
PPM 099676     09:34:52.7 +28:14:49  6.4  3.04  82
PPM 074553     09:31:48.0 +31:12:28  7.9  0.96  80
PPM 074501     09:27:35.5 +31:11:53  9.8  0.35  79
523776         09:27:38.1 +30:50:47 11.6        80
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 20.1 km RECON observability=1.0 and success probability=1.6%

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
Sleaford	12:08:12	-26.4	Dark	Up	62.2	230.2	Up	11:58:10 - 12:18:13	5811
Dunrhomin	12:07:25	-24.4	Dark	Down	67.6	253.5	Up	11:57:23 - 12:17:26	5227
Nikitin	12:07:25	-24.3	Dark	Down	67.6	253.9	Up	11:57:24 - 12:17:27	5216
CU-SBO	12:07:07	-24.4	Dark	Down	67.8	253.9	Up	11:57:06 - 12:17:09	5197
Kamloops	12:08:36	-35.3	Dark	Up	68.8	205.3	Up	11:58:35 - 12:18:38	4970
Kelowna	12:08:30	-34.8	Dark	Up	69.3	208.2	Up	11:58:29 - 12:18:32	4963
Peachland	12:08:30	-35.0	Dark	Up	69.5	207.7	Up	11:58:28 - 12:18:31	4940
Penticton	12:08:30	-34.9	Dark	Up	69.6	208.4	Up	11:58:28 - 12:18:31	4936
Summerland	12:08:30	-35.0	Dark	Up	69.6	208.1	Up	11:58:28 - 12:18:31	4935
Oliver	12:08:27	-35.0	Dark	Up	69.9	208.8	Up	11:58:25 - 12:18:28	4913
Anarchist Mountain Observatory	12:08:28	-34.8	Dark	Up	70.0	209.5	Up	11:58:26 - 12:18:29	4912
Okanogan	12:08:23	-35.0	Dark	Up	70.7	209.9	Up	11:58:22 - 12:18:25	4857
Brewster	12:08:23	-35.2	Dark	Up	71.0	209.8	Up	11:58:22 - 12:18:25	4827
Manson/Chelan	12:08:24	-35.4	Dark	Up	71.3	209.2	Up	11:58:22 - 12:18:25	4793
Wenatchee	12:08:21	-35.6	Dark	Up	71.7	209.4	Up	11:58:20 - 12:18:23	4751
PNWRO	12:08:11	-34.7	Dark	Up	72.4	215.2	Up	11:58:09 - 12:18:12	4735
Ellensburg	12:08:20	-35.8	Dark	Up	72.2	209.4	Up	11:58:18 - 12:18:21	4710
Yakima	12:08:19	-35.8	Dark	Up	72.5	210.0	Up	11:58:18 - 12:18:21	4681
Toppenish/White Swan	12:08:17	-35.7	Dark	Up	72.7	210.8	Up	11:58:16 - 12:18:19	4676
Victoria	12:08:37	-37.5	Dark	Up	71.6	200.2	Up	11:58:36 - 12:18:39	4662
The Dalles	12:08:17	-36.3	Dark	Up	73.6	210.0	Up	11:58:16 - 12:18:19	4577
Maupin	12:08:16	-36.2	Dark	Up	73.9	211.0	Up	11:58:14 - 12:18:17	4553
Sisters	12:08:11	-36.6	Dark	Up	74.9	211.1	Up	11:58:10 - 12:18:13	4462
Bend	12:08:09	-36.5	Dark	Up	75.0	212.3	Up	11:58:07 - 12:18:10	4460
Oregon Observatory	12:08:10	-36.6	Dark	Up	75.2	212.3	Up	11:58:09 - 12:18:12	4440
George/Scottsdale	12:06:56	-28.5	Dark	Down	74.2	265.0	Up	11:56:54 - 12:16:57	4349
Cedarville	12:07:55	-35.7	Dark	Up	76.5	221.6	Up	11:57:54 - 12:17:57	4347
Patrick	12:07:08	-30.4	Dark	Down	75.5	256.8	Up	11:57:06 - 12:17:09	4326
Chiloquin	12:08:05	-36.9	Dark	Up	76.5	213.8	Up	11:58:03 - 12:18:06	4321
Klamath Falls	12:08:03	-36.8	Dark	Up	76.7	214.8	Up	11:58:01 - 12:18:04	4301
Laughlin/Bullhead City	12:07:10	-30.9	Dark	Up	76.1	256.8	Up	11:57:09 - 12:17:12	4260
Fall River/Burney	12:07:57	-36.6	Dark	Up	77.5	219.1	Up	11:57:56 - 12:17:59	4238
Beatty	12:07:25	-32.8	Dark	Up	77.2	246.3	Up	11:57:24 - 12:17:27	4235
Lake Havasu City	12:07:05	-30.6	Dark	Down	76.1	259.8	Up	11:57:04 - 12:17:07	4231
Hawthorne	12:07:37	-34.4	Dark	Up	77.7	235.7	Up	11:57:36 - 12:17:39	4229
Yerington	12:07:42	-34.8	Dark	Up	77.7	232.5	Up	11:57:41 - 12:17:44	4228
Reno	12:07:44	-35.4	Dark	Up	77.8	228.7	Up	11:57:43 - 12:17:46	4227
Portola	12:07:48	-35.9	Dark	Up	78.0	225.8	Up	11:57:46 - 12:17:49	4205
Gimple	12:07:53	-36.2	Dark	Up	77.9	223.6	Up	11:57:51 - 12:17:54	4204
Carson City	12:07:43	-35.3	Dark	Up	78.0	230.0	Up	11:57:41 - 12:17:44	4202
Greenville	12:07:52	-36.2	Dark	Up	78.0	223.3	Up	11:57:51 - 12:17:54	4199
Gardnerville	12:07:43	-35.3	Dark	Up	78.1	231.0	Up	11:57:41 - 12:17:44	4187
Quincy	12:07:51	-36.2	Dark	Up	78.1	223.9	Up	11:57:49 - 12:17:52	4184
Bishop	12:07:31	-34.2	Dark	Up	78.2	240.8	Up	11:57:30 - 12:17:33	4160
Lee Vining	12:07:36	-34.8	Dark	Up	78.3	236.5	Up	11:57:34 - 12:17:37	4157
Yuma	12:07:00	-30.6	Dark	Down	76.6	266.8	Up	11:56:59 - 12:17:02	4083
Calipatria	12:07:03	-31.4	Dark	Up	77.3	264.2	Up	11:57:01 - 12:17:04	4051
Idyllwild	12:07:10	-32.5	Dark	Up	78.2	260.2	Up	11:57:08 - 12:17:11	4012
Wildwood	12:07:25	-34.0	Dark	Up	79.6	255.8	Up	11:57:23 - 12:17:26	3912

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 523776, (2026/12/21 12:06UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3 21.37  96
PPM 099676     09:33:18.2 +28:22:04  6.4  3.04  82
PPM 074553     09:30:11.9 +31:19:38  7.9  0.96  80
PPM 074501     09:25:59.0 +31:18:57  9.8  0.35  79
523776         09:26:01.8 +30:57:51 11.6        79
Positions are for J2000

Event circumstances last updated at 2024/03/19 03:51:36 UT

RECON