RECON: TNO occultation with 342842

Event between (342842) 08YB3 and star GA1180:12832514 with event index number of 2204799

Geocentric closest approach at 2026/06/04 07:40:07 UTC

J2000 position of star is 20:07:13.8 +28:04:11
Equinox of date position of star is 20:08:13.5 +28:08:27
Stellar brightness G=16.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 52 degrees from the moon. Moon is 86% illuminated.
Apparent brightness V=21.8

[RECON map]
Object is 16.1 AU from the Sun and 15.7 AU from the Earth.
Apparent velocity is 21.8 km/sec on the sky relative to the star, or, 6.9 arcsec/hr.
The 1-sigma error in the time of the event is 42 seconds.
The 1-sigma cross-track error in the shadow position is 1748 km.
The sky-plane scale is 11378.7 km/arcsec.

The object has an absolute magnitude Hv=9.5
Diameter=82.8 km assuming a 5% albedo -- 3.6 sec chord
Diameter=33.8 km assuming a 30% albedo -- 1.5 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 342842, (2026/06/04 07:40UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:42:20.0 +45:22:33  1.3 18.50  70
53Eps Cyg      20:47:16.8 +34:04:12  2.5 10.22  59
18 Vul         20:11:39.7 +26:59:01  5.5  1.38  51
PPM 110469     20:09:14.2 +28:17:57  8.2  0.25  52
PPM 110420     20:07:37.9 +28:19:49 10.4  0.24  52
342842         20:08:19.1 +28:08:51 16.9        52
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 36.3 km RECON observability=1.0 and success probability=31.5%

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
Sleaford	07:42:42	-14.9	AT	Up	52.3	114.1	Up	07:38:40 - 07:46:43	267
Kamloops	07:43:18	-16.8	AT	Up	44.1	98.6	Up	07:39:17 - 07:47:20	206
Kelowna	07:43:18	-17.6	AT	Up	44.8	98.6	Up	07:39:16 - 07:47:19	111
Peachland	07:43:18	-17.7	AT	Up	44.6	98.2	Up	07:39:17 - 07:47:20	102
Summerland	07:43:18	-17.9	AT	Up	44.7	98.1	Up	07:39:17 - 07:47:20	86
Penticton	07:43:18	-18.0	AT	Up	44.8	98.2	Up	07:39:17 - 07:47:20	77
Oliver	07:43:19	-18.3	Dark	Up	44.8	97.8	Up	07:39:17 - 07:47:20	40
Anarchist Mountain Observatory	07:43:19	-18.5	Dark	Up	45.0	97.8	Up	07:39:17 - 07:47:20	20
Victoria	07:43:28	-18.7	Dark	Up	42.4	94.1	Up	07:39:27 - 07:47:30	17
Okanogan	07:43:20	-19.1	Dark	Up	44.9	97.0	Up	07:39:19 - 07:47:22	-46
Brewster	07:43:21	-19.4	Dark	Up	44.8	96.6	Up	07:39:19 - 07:47:22	-73
Manson/Chelan	07:43:22	-19.6	Dark	Up	44.6	96.1	Up	07:39:20 - 07:47:23	-91
Wenatchee	07:43:23	-20.0	Dark	Up	44.5	95.5	Up	07:39:22 - 07:47:25	-139
Ellensburg	07:43:24	-20.5	Dark	Up	44.4	94.9	Up	07:39:23 - 07:47:26	-181
Yakima	07:43:25	-20.9	Dark	Up	44.5	94.5	Up	07:39:23 - 07:47:26	-224
Toppenish/White Swan	07:43:25	-21.1	Dark	Up	44.6	94.4	Up	07:39:23 - 07:47:26	-249
PNWRO	07:43:22	-21.5	Dark	Up	45.6	95.2	Up	07:39:20 - 07:47:23	-306
The Dalles	07:43:28	-21.8	Dark	Up	44.1	93.0	Up	07:39:26 - 07:47:29	-322
Maupin	07:43:28	-22.2	Dark	Up	44.2	92.7	Up	07:39:27 - 07:47:30	-369
Sisters	07:43:30	-23.1	Dark	Up	43.9	91.5	Up	07:39:29 - 07:47:32	-457
Bend	07:43:30	-23.3	Dark	Up	44.1	91.5	Up	07:39:29 - 07:47:32	-486
Oregon Observatory	07:43:31	-23.5	Dark	Up	44.0	91.2	Up	07:39:29 - 07:47:32	-503
Chiloquin	07:43:33	-24.8	Dark	Up	43.7	89.7	Up	07:39:32 - 07:47:35	-639
Klamath Falls	07:43:33	-25.1	Dark	Up	43.8	89.4	Up	07:39:32 - 07:47:35	-677
Cedarville	07:43:30	-25.9	Dark	Up	44.9	89.8	Up	07:39:29 - 07:47:32	-774
Fall River/Burney	07:43:34	-26.3	Dark	Up	44.0	88.5	Up	07:39:32 - 07:47:35	-810
Greenville	07:43:34	-27.3	Dark	Up	44.3	87.9	Up	07:39:32 - 07:47:35	-915
Gimple	07:43:33	-27.3	Dark	Up	44.4	88.0	Up	07:39:32 - 07:47:35	-916
Quincy	07:43:34	-27.5	Dark	Up	44.3	87.7	Up	07:39:32 - 07:47:35	-937
Portola	07:43:33	-27.6	Dark	Up	44.7	87.9	Up	07:39:31 - 07:47:34	-957
Reno	07:43:31	-27.9	Dark	Up	45.2	88.0	Up	07:39:30 - 07:47:33	-994
Dunrhomin	07:42:47	-26.5	Dark	Up	56.2	99.0	Up	07:38:46 - 07:46:49	-1017
Carson City	07:43:31	-28.3	Dark	Up	45.2	87.7	Up	07:39:30 - 07:47:33	-1034
Nikitin	07:42:47	-26.7	Dark	Up	56.2	98.7	Up	07:38:46 - 07:46:49	-1037
CU-SBO	07:42:48	-26.7	Dark	Up	56.2	98.6	Up	07:38:46 - 07:46:49	-1044
Gardnerville	07:43:32	-28.5	Dark	Up	45.2	87.4	Up	07:39:30 - 07:47:33	-1061
Yerington	07:43:30	-28.5	Dark	Up	45.7	87.8	Up	07:39:28 - 07:47:31	-1063
Hawthorne	07:43:29	-29.0	Dark	Up	46.1	87.7	Up	07:39:27 - 07:47:30	-1121
Lee Vining	07:43:31	-29.5	Dark	Up	45.6	86.8	Up	07:39:29 - 07:47:32	-1176
Bishop	07:43:29	-30.2	Dark	Up	46.2	86.6	Up	07:39:27 - 07:47:30	-1251
Beatty	07:43:25	-30.7	Dark	Up	47.4	87.0	Up	07:39:23 - 07:47:26	-1320
Patrick	07:43:17	-32.1	Dark	Up	49.7	86.9	Up	07:39:15 - 07:47:18	-1512
Laughlin/Bullhead City	07:43:19	-32.4	Dark	Up	49.1	86.2	Up	07:39:17 - 07:47:20	-1533
Wildwood	07:43:32	-33.4	Dark	Up	45.7	83.1	Up	07:39:30 - 07:47:33	-1607
Lake Havasu City	07:43:19	-33.0	Dark	Up	49.2	85.6	Up	07:39:17 - 07:47:20	-1610
Idyllwild	07:43:26	-33.8	Dark	Up	47.2	83.6	Up	07:39:25 - 07:47:28	-1669
George/Scottsdale	07:43:11	-33.7	Dark	Up	51.2	85.8	Up	07:39:09 - 07:47:12	-1715
Calipatria	07:43:23	-34.4	Dark	Up	48.1	83.5	Up	07:39:21 - 07:47:24	-1749
Yuma	07:43:20	-34.8	Dark	Up	48.8	83.4	Up	07:39:19 - 07:47:22	-1805

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 342842, (2026/06/04 07:40UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:41:25.9 +45:16:49  1.3 18.50  70
53Eps Cyg      20:46:13.3 +33:58:20  2.5 10.22  59
18 Vul         20:10:33.6 +26:54:14  5.5  1.38  51
PPM 110469     20:08:09.0 +28:13:15  8.2  0.25  52
PPM 110420     20:06:32.8 +28:15:10 10.4  0.24  52
342842         20:07:13.8 +28:04:11 16.9        52
Positions are for J2000

Event circumstances last updated at 2024/03/05 04:25:56 UT

RECON