RECON: TNO occultation with 506439

Event between (506439) 00YB2 and star GA1100:02051545 with event index number of 2258416

Geocentric closest approach at 2026/11/26 05:06:55 UTC

J2000 position of star is 06:25:44.6 +20:46:32
Equinox of date position of star is 06:27:12.2 +20:45:36
Stellar brightness G=17.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 12 degrees from the moon. Moon is 96% illuminated.
Apparent brightness V=23.1

[RECON map]
Object is 39.2 AU from the Sun and 38.4 AU from the Earth.
Apparent velocity is 20.9 km/sec on the sky relative to the star, or, 2.7 arcsec/hr.
The 1-sigma error in the time of the event is 932 seconds.
The 1-sigma cross-track error in the shadow position is 1433 km.
The sky-plane scale is 27839.2 km/arcsec.

The object has an absolute magnitude Hv=7.1
Diameter=275.4 km assuming a 5% albedo -- 10.8 sec chord
Diameter=112.4 km assuming a 30% albedo -- 4.4 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 506439, (2026/11/26 05:07UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:37.7 +07:24:35  0.4 15.28  20
Alhena         06:39:15.9 +16:22:26  1.9  5.21  17
16 Gem         06:29:32.7 +20:28:39  6.1  0.59  12
PPM 095976     06:28:26.2 +20:25:29  8.9  0.42  12
PPM 095942     06:27:06.3 +20:30:13 10.2  0.26  12
506439         06:27:20.9 +20:45:30 17.0        12
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 1.0 sigma about the mid-time.
The median site spacing is 25.4 km RECON observability=1.0 and success probability=0.0%

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
Kamloops	05:10:08	-47.1	Dark	Up	25.9	88.3	Low	04:55:08 - 05:25:08	4429
Kelowna	05:10:11	-48.0	Dark	Up	26.4	88.6	Low	04:55:11 - 05:25:11	4345
Peachland	05:10:11	-47.9	Dark	Up	26.3	88.3	Low	04:55:11 - 05:25:11	4344
Victoria	05:10:19	-46.3	Dark	Up	23.8	85.1	Low	04:55:19 - 05:25:19	4337
Summerland	05:10:11	-48.0	Dark	Up	26.3	88.3	Low	04:55:11 - 05:25:11	4330
Penticton	05:10:12	-48.1	Dark	Up	26.4	88.4	Low	04:55:12 - 05:25:12	4322
Oliver	05:10:13	-48.3	Dark	Up	26.4	88.2	Low	04:55:13 - 05:25:13	4294
Anarchist Mountain Observatory	05:10:13	-48.5	Dark	Up	26.5	88.2	Low	04:55:13 - 05:25:13	4276
Okanogan	05:10:16	-48.6	Dark	Up	26.3	87.8	Low	04:55:16 - 05:25:16	4230
Sleaford	05:09:45	-53.2	Dark	Up	34.7	100.8	Up	04:54:45 - 05:24:45	4224
Brewster	05:10:17	-48.6	Dark	Up	26.2	87.5	Low	04:55:17 - 05:25:17	4213
Manson/Chelan	05:10:18	-48.5	Dark	Up	25.9	87.1	Low	04:55:18 - 05:25:18	4206
Wenatchee	05:10:20	-48.6	Dark	Up	25.8	86.8	Low	04:55:20 - 05:25:20	4172
Ellensburg	05:10:22	-48.7	Dark	Up	25.6	86.4	Low	04:55:22 - 05:25:22	4144
Yakima	05:10:24	-48.8	Dark	Up	25.6	86.2	Low	04:55:24 - 05:25:24	4112
Toppenish/White Swan	05:10:24	-49.0	Dark	Up	25.7	86.2	Low	04:55:24 - 05:25:24	4089
The Dalles	05:10:28	-48.9	Dark	Up	25.1	85.3	Low	04:55:28 - 05:25:28	4046
PNWRO	05:10:24	-50.1	Dark	Up	26.7	87.1	Low	04:55:24 - 05:25:24	4021
Maupin	05:10:29	-49.1	Dark	Up	25.2	85.2	Low	04:55:29 - 05:25:29	4009
Sisters	05:10:33	-49.1	Dark	Up	24.7	84.5	Low	04:55:33 - 05:25:33	3949
Bend	05:10:33	-49.4	Dark	Up	24.9	84.5	Low	04:55:33 - 05:25:33	3922
Oregon Observatory	05:10:34	-49.4	Dark	Up	24.8	84.4	Low	04:55:34 - 05:25:34	3912
Chiloquin	05:10:39	-49.5	Dark	Up	24.4	83.5	Low	04:55:39 - 05:25:39	3811
Klamath Falls	05:10:41	-49.7	Dark	Up	24.4	83.4	Low	04:55:41 - 05:25:41	3780
Cedarville	05:10:41	-51.1	Dark	Up	25.5	84.1	Low	04:55:41 - 05:25:41	3675
Fall River/Burney	05:10:43	-50.4	Dark	Up	24.5	83.1	Low	04:55:43 - 05:25:43	3667
Greenville	05:10:46	-51.0	Dark	Up	24.8	83.0	Low	04:55:46 - 05:25:46	3575
Gimple	05:10:46	-51.0	Dark	Up	24.8	83.1	Low	04:55:46 - 05:25:46	3573
Quincy	05:10:47	-51.0	Dark	Up	24.8	82.9	Low	04:55:47 - 05:25:47	3557
Portola	05:10:47	-51.4	Dark	Up	25.1	83.1	Low	04:55:47 - 05:25:47	3533
Reno	05:10:47	-52.0	Dark	Up	25.6	83.4	Low	04:55:47 - 05:25:47	3490
Carson City	05:10:48	-52.1	Dark	Up	25.6	83.3	Low	04:55:48 - 05:25:48	3458
Gardnerville	05:10:48	-52.2	Dark	Up	25.6	83.2	Low	04:55:48 - 05:25:48	3435
Yerington	05:10:47	-52.6	Dark	Up	26.0	83.5	Low	04:55:47 - 05:25:47	3422
Hawthorne	05:10:48	-53.2	Dark	Up	26.4	83.6	Low	04:55:48 - 05:25:48	3365
Lee Vining	05:10:51	-53.0	Dark	Up	25.9	83.1	Low	04:55:51 - 05:25:51	3328
Bishop	05:10:52	-53.7	Dark	Up	26.4	83.2	Low	04:55:52 - 05:25:52	3252
Dunrhomin	05:10:20	-61.7	Dark	Up	36.7	93.0	Up	04:55:20 - 05:25:20	3164
Beatty	05:10:51	-55.1	Dark	Up	27.7	83.9	Low	04:55:51 - 05:25:51	3162
Nikitin	05:10:21	-61.8	Dark	Up	36.7	92.8	Up	04:55:21 - 05:25:21	3148
CU-SBO	05:10:21	-61.7	Dark	Up	36.7	92.7	Up	04:55:21 - 05:25:21	3143
Wildwood	05:11:01	-54.4	Dark	Up	25.9	81.5	Low	04:56:01 - 05:26:01	2954
Patrick	05:10:51	-57.8	Dark	Up	29.9	84.6	Low	04:55:51 - 05:25:51	2939
Laughlin/Bullhead City	05:10:52	-57.3	Dark	Up	29.3	84.1	Low	04:55:52 - 05:25:52	2936
Lake Havasu City	05:10:53	-57.7	Dark	Up	29.4	83.9	Low	04:55:53 - 05:25:53	2864
Idyllwild	05:10:59	-56.0	Dark	Up	27.4	82.3	Low	04:55:59 - 05:25:59	2863
Calipatria	05:10:59	-57.1	Dark	Up	28.3	82.5	Low	04:55:59 - 05:25:59	2769
George/Scottsdale	05:10:51	-59.8	Dark	Up	31.4	84.7	Up	04:55:51 - 05:25:51	2718
Yuma	05:10:58	-57.9	Dark	Up	29.0	82.7	Low	04:55:58 - 05:25:58	2700

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 506439, (2026/11/26 05:07UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 15.28  20
Alhena         06:37:42.8 +16:23:57  1.9  5.21  17
16 Gem         06:27:56.7 +20:29:46  6.1  0.59  12
PPM 095976     06:26:50.2 +20:26:34  8.9  0.42  12
PPM 095942     06:25:30.2 +20:31:15 10.2  0.26  12
506439         06:25:44.6 +20:46:32 17.0        12
Positions are for J2000

Event circumstances last updated at 2024/06/20 21:25:57 UT

RECON