RECON: TNO occultation with 567122

Event between (567122) 20PM3 and star GA1280:00207158 with event index number of 2643067

Geocentric closest approach at 2026/10/15 10:41:19 UTC

J2000 position of star is 00:51:38.3 +39:42:41
Equinox of date position of star is 00:52:57.7 +39:50:27
Stellar brightness G=15.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 128 degrees from the moon. Moon is 21% illuminated.
Apparent brightness V=20.2

[RECON map]
Object is 12.2 AU from the Sun and 11.3 AU from the Earth.
Apparent velocity is 21.1 km/sec on the sky relative to the star, or, 9.2 arcsec/hr.
The 1-sigma error in the time of the event is 43 seconds.
The 1-sigma cross-track error in the shadow position is 1052 km.
The sky-plane scale is 8230.5 km/arcsec.

The object has an absolute magnitude Hv=9.2
Diameter=80.5 km assuming a 5% albedo -- 4.1 sec chord
Diameter=32.9 km assuming a 30% albedo -- 1.7 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 567122, (2026/10/15 10:41UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:42:20.8 +45:22:38  1.3 45.29  88
57Gam1And      02:05:33.3 +42:27:25  2.3 13.85 141
35Nu And       00:51:18.1 +41:13:28  4.5  1.41 128
PPM 065725     00:54:28.6 +39:11:22  8.2  0.72 128
PPM 065701     00:53:06.0 +39:34:10  9.3  0.29 128
PPM 065717     00:54:09.9 +39:41:11 10.8  0.26 128
567122         00:53:07.4 +39:51:24 15.8       128
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 23.1 km RECON observability=1.0 and success probability=57.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 10:38:08 -26.6 Dark Down 44.9 280.8 Up 10:34:02 - 10:42:14 897
Kamloops 10:38:35 -35.1 Dark Down 53.6 272.4 Up 10:34:29 - 10:42:41 347
Kelowna 10:38:31 -35.1 Dark Down 53.0 274.2 Up 10:34:25 - 10:42:37 287
Peachland 10:38:31 -35.3 Dark Down 53.2 274.1 Up 10:34:25 - 10:42:37 268
Summerland 10:38:31 -35.4 Dark Down 53.1 274.4 Up 10:34:25 - 10:42:37 255
Penticton 10:38:30 -35.3 Dark Down 53.1 274.5 Up 10:34:24 - 10:42:36 251
Oliver 10:38:29 -35.5 Dark Down 53.0 275.0 Up 10:34:23 - 10:42:35 215
Anarchist Mountain Observatory 10:38:29 -35.5 Dark Down 52.9 275.4 Up 10:34:23 - 10:42:35 203
Okanogan 10:38:28 -36.0 Dark Down 53.0 276.0 Up 10:34:22 - 10:42:34 132
Brewster 10:38:28 -36.3 Dark Down 53.1 276.3 Up 10:34:22 - 10:42:34 99
Manson/Chelan 10:38:28 -36.6 Dark Down 53.3 276.3 Up 10:34:22 - 10:42:34 68
Victoria 10:38:38 -38.0 Dark Down 55.5 273.3 Up 10:34:32 - 10:42:44 53
Wenatchee 10:38:28 -36.9 Dark Down 53.4 276.8 Up 10:34:22 - 10:42:34 15
Ellensburg 10:38:27 -37.3 Dark Down 53.5 277.3 Up 10:34:21 - 10:42:33 -34
Yakima 10:38:27 -37.5 Dark Down 53.4 277.8 Up 10:34:21 - 10:42:33 -76
PNWRO 10:38:21 -36.8 Dark Down 52.2 279.5 Up 10:34:15 - 10:42:27 -91
Toppenish/White Swan 10:38:26 -37.5 Dark Down 53.3 278.2 Up 10:34:20 - 10:42:32 -94
Dunrhomin 10:37:36 -29.9 Dark Down 41.2 291.8 Up 10:33:30 - 10:41:42 -193
The Dalles 10:38:27 -38.4 Dark Down 53.7 278.8 Up 10:34:21 - 10:42:33 -195
Nikitin 10:37:36 -30.0 Dark Down 41.1 292.0 Up 10:33:30 - 10:41:42 -212
CU-SBO 10:37:36 -30.1 Dark Down 41.1 292.0 Up 10:33:30 - 10:41:42 -221
Maupin 10:38:26 -38.6 Dark Down 53.6 279.4 Up 10:34:20 - 10:42:32 -235
Sisters 10:38:25 -39.3 Dark Down 53.8 280.3 Up 10:34:19 - 10:42:31 -340
Bend 10:38:24 -39.3 Dark Down 53.6 280.7 Up 10:34:18 - 10:42:30 -358
Oregon Observatory 10:38:24 -39.5 Dark Down 53.6 280.9 Up 10:34:18 - 10:42:30 -379
Chiloquin 10:38:23 -40.4 Dark Down 53.6 282.5 Up 10:34:17 - 10:42:29 -528
Klamath Falls 10:38:22 -40.5 Dark Down 53.5 282.9 Up 10:34:16 - 10:42:28 -561
Cedarville 10:38:17 -39.9 Dark Down 52.2 284.5 Up 10:34:11 - 10:42:23 -589
Fall River/Burney 10:38:19 -40.9 Dark Down 53.0 284.6 Up 10:34:13 - 10:42:25 -674
Gimple 10:38:16 -41.0 Dark Down 52.3 286.0 Up 10:34:10 - 10:42:22 -754
Greenville 10:38:17 -41.0 Dark Down 52.4 285.9 Up 10:34:11 - 10:42:23 -756
Portola 10:38:15 -40.9 Dark Down 52.0 286.5 Up 10:34:09 - 10:42:21 -776
Quincy 10:38:16 -41.1 Dark Down 52.3 286.2 Up 10:34:10 - 10:42:22 -777
Reno 10:38:12 -40.6 Dark Down 51.4 287.1 Up 10:34:06 - 10:42:18 -785
Carson City 10:38:12 -40.7 Dark Down 51.3 287.5 Up 10:34:06 - 10:42:18 -821
Yerington 10:38:10 -40.4 Dark Down 50.8 288.0 Up 10:34:04 - 10:42:16 -822
Gardnerville 10:38:11 -40.8 Dark Down 51.2 287.8 Up 10:34:05 - 10:42:17 -845
Hawthorne 10:38:07 -40.2 Dark Down 50.2 288.7 Up 10:34:01 - 10:42:13 -854
Lee Vining 10:38:08 -40.8 Dark Down 50.4 289.2 Up 10:34:02 - 10:42:14 -928
Beatty 10:37:59 -39.5 Dark Down 48.3 291.0 Up 10:33:53 - 10:42:05 -961
Bishop 10:38:05 -40.5 Dark Down 49.7 290.0 Up 10:33:59 - 10:42:11 -967
Patrick 10:37:49 -37.9 Dark Down 45.6 293.2 Up 10:33:43 - 10:41:55 -1011
Laughlin/Bullhead City 10:37:51 -38.5 Dark Down 46.1 293.3 Up 10:33:45 - 10:41:57 -1062
George/Scottsdale 10:37:41 -36.8 Dark Down 43.4 295.2 Up 10:33:35 - 10:41:47 -1106
Lake Havasu City 10:37:49 -38.5 Dark Down 45.6 294.0 Up 10:33:43 - 10:41:55 -1121
Idyllwild 10:37:55 -40.6 Dark Down 47.1 294.2 Up 10:33:49 - 10:42:01 -1284
Calipatria 10:37:50 -39.9 Dark Down 45.9 295.0 Up 10:33:44 - 10:41:56 -1304
Wildwood 10:38:01 -41.9 Dark Down 48.6 293.5 Up 10:33:55 - 10:42:07 -1312
Yuma 10:37:47 -39.3 Dark Down 45.1 295.6 Up 10:33:41 - 10:41:53 -1316

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 567122, (2026/10/15 10:41UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:41:25.9 +45:16:49  1.3 45.29  88
57Gam1And      02:03:54.1 +42:19:46  2.3 13.85 141
35Nu And       00:49:48.9 +41:04:44  4.5  1.41 128
PPM 065725     00:52:59.4 +39:02:40  8.2  0.72 128
PPM 065701     00:51:36.9 +39:25:27  9.3  0.29 128
PPM 065717     00:52:40.7 +39:32:29 10.8  0.26 128
567122         00:51:38.3 +39:42:41 15.8       128
Positions are for J2000

Event circumstances last updated at 2023/11/21 04:27:48 UT

Marc W. Buie, Southwest Research Institute

RECON