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 10:40:42 UTC

J2000 position of star is 00:51:38.3 +39:42:41
Equinox of date position of star is 00:52:51.6 +39:49:51
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.
TNO apparent brightness V=20.4

[RECON map]
TNO is 12.2 AU from the Sun and 11.3 AU from the Earth.
The TNO is moving 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 120 seconds.
The 1-sigma cross-track error in the shadow position is 2990 km.
The sky-plane scale is 8230.5 km/arcsec.

The TNO has an absolute magnitude Hv=9.4
Diameter=80.5 km assuming a 5% albedo -- 3.8 sec chord
Diameter=32.9 km assuming a 30% albedo -- 1.6 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 23.7 km RECON observability=1.0 and success probability=20.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 10:37:31 -26.7 Dark Down 45.0 280.7 Up 10:27:02 - 10:48:00 1571
Kamloops 10:37:58 -35.2 Dark Down 53.7 272.3 Up 10:27:29 - 10:48:27 1022
Kelowna 10:37:54 -35.2 Dark Down 53.1 274.1 Up 10:27:25 - 10:48:23 962
Peachland 10:37:54 -35.4 Dark Down 53.3 274.0 Up 10:27:25 - 10:48:23 943
Summerland 10:37:54 -35.4 Dark Down 53.2 274.3 Up 10:27:25 - 10:48:23 930
Penticton 10:37:54 -35.4 Dark Down 53.2 274.4 Up 10:27:25 - 10:48:23 926
Oliver 10:37:53 -35.6 Dark Down 53.1 274.9 Up 10:27:24 - 10:48:22 891
Anarchist Mountain Observatory 10:37:52 -35.6 Dark Down 53.0 275.2 Up 10:27:23 - 10:48:21 878
Tonasket 10:37:51 -35.8 Dark Down 53.0 275.6 Up 10:27:22 - 10:48:20 845
Okanogan 10:37:51 -36.1 Dark Down 53.1 275.9 Up 10:27:22 - 10:48:20 807
Brewster 10:37:51 -36.3 Dark Down 53.2 276.2 Up 10:27:22 - 10:48:20 774
Manson/Chelan 10:37:52 -36.7 Dark Down 53.4 276.2 Up 10:27:23 - 10:48:21 743
Victoria 10:38:01 -38.1 Dark Down 55.6 273.2 Up 10:27:32 - 10:48:30 728
Wenatchee 10:37:51 -37.0 Dark Down 53.5 276.7 Up 10:27:22 - 10:48:20 690
Ellensburg 10:37:51 -37.4 Dark Down 53.6 277.2 Up 10:27:22 - 10:48:20 642
Yakima 10:37:50 -37.6 Dark Down 53.5 277.7 Up 10:27:21 - 10:48:19 599
PNWRO 10:37:44 -36.9 Dark Down 52.3 279.4 Up 10:27:15 - 10:48:13 584
Toppenish/White Swan 10:37:49 -37.6 Dark Down 53.4 278.1 Up 10:27:20 - 10:48:18 581
Goldendale 10:37:49 -38.2 Dark Down 53.6 278.6 Up 10:27:20 - 10:48:18 513
The Dalles 10:37:50 -38.5 Dark Down 53.8 278.7 Up 10:27:21 - 10:48:19 480
Dunrhomin 10:36:59 -30.0 Dark Down 41.3 291.8 Up 10:26:30 - 10:47:28 480
Maupin 10:37:49 -38.7 Dark Down 53.7 279.3 Up 10:27:20 - 10:48:18 440
Sisters 10:37:49 -39.4 Dark Down 53.9 280.2 Up 10:27:20 - 10:48:18 335
Bend 10:37:47 -39.4 Dark Down 53.7 280.7 Up 10:27:18 - 10:48:16 317
Oregon Observatory 10:37:48 -39.6 Dark Down 53.7 280.8 Up 10:27:19 - 10:48:17 296
North Lake 10:37:45 -39.6 Dark Down 53.2 281.9 Up 10:27:16 - 10:48:14 244
Lakeview 10:37:41 -39.8 Dark Down 52.6 283.6 Up 10:27:12 - 10:48:10 149
Chiloquin 10:37:46 -40.5 Dark Down 53.8 282.4 Up 10:27:17 - 10:48:15 147
Klamath Falls 10:37:46 -40.6 Dark Down 53.6 282.9 Up 10:27:17 - 10:48:15 113
Cedarville 10:37:40 -40.0 Dark Down 52.3 284.5 Up 10:27:11 - 10:48:09 86
Fall River/Burney 10:37:43 -41.0 Dark Down 53.1 284.6 Up 10:27:14 - 10:48:12 1
Susanville 10:37:39 -40.8 Dark Down 52.4 285.7 Up 10:27:10 - 10:48:08 -44
Gimple 10:37:40 -41.1 Dark Down 52.5 285.9 Up 10:27:11 - 10:48:09 -79
Greenville 10:37:40 -41.1 Dark Down 52.5 285.9 Up 10:27:11 - 10:48:09 -81
Portola 10:37:38 -41.0 Dark Down 52.1 286.5 Up 10:27:09 - 10:48:07 -102
Quincy 10:37:40 -41.2 Dark Down 52.5 286.1 Up 10:27:11 - 10:48:09 -102
Reno 10:37:36 -40.7 Dark Down 51.5 287.0 Up 10:27:07 - 10:48:05 -110
Carson City 10:37:35 -40.8 Dark Down 51.4 287.5 Up 10:27:06 - 10:48:04 -147
Yerington 10:37:33 -40.5 Dark Down 50.9 287.9 Up 10:27:04 - 10:48:02 -148
Gardnerville 10:37:34 -40.9 Dark Down 51.3 287.8 Up 10:27:05 - 10:48:03 -171
Hawthorne 10:37:31 -40.3 Dark Down 50.4 288.6 Up 10:27:02 - 10:48:00 -180
Tonopah 10:37:26 -39.5 Dark Down 49.2 289.6 Up 10:26:57 - 10:47:55 -183
Lee Vining 10:37:31 -40.9 Dark Down 50.5 289.1 Up 10:27:02 - 10:48:00 -253
Indian Springs 10:37:19 -38.9 Dark Down 47.5 291.6 Up 10:26:50 - 10:47:48 -283
Beatty 10:37:23 -39.6 Dark Down 48.4 290.9 Up 10:26:54 - 10:47:52 -287
Bishop 10:37:28 -40.6 Dark Down 49.8 290.0 Up 10:26:59 - 10:47:57 -293
Henderson 10:37:16 -38.6 Dark Down 46.8 292.3 Up 10:26:47 - 10:47:45 -314
Patrick 10:37:12 -38.0 Dark Down 45.7 293.2 Up 10:26:43 - 10:47:41 -338
Kingman/Dolan Springs 10:37:12 -38.2 Dark Down 45.8 293.3 Up 10:26:43 - 10:47:41 -367
Laughlin/Bullhead City 10:37:14 -38.6 Dark Down 46.2 293.2 Up 10:26:45 - 10:47:43 -388
Mohave Valley 10:37:13 -38.7 Dark Down 46.1 293.5 Up 10:26:44 - 10:47:42 -416
George/Scottsdale 10:37:04 -36.9 Dark Down 43.6 295.2 Up 10:26:35 - 10:47:33 -433
Lake Havasu City 10:37:12 -38.6 Dark Down 45.7 293.9 Up 10:26:43 - 10:47:41 -448
Parker 10:37:11 -38.7 Dark Down 45.6 294.3 Up 10:26:42 - 10:47:40 -482
Idyllwild 10:37:18 -40.7 Dark Down 47.2 294.2 Up 10:26:49 - 10:47:47 -611
Calipatria 10:37:14 -40.0 Dark Down 46.1 295.0 Up 10:26:45 - 10:47:43 -631
Wildwood 10:37:24 -42.1 Dark Down 48.8 293.5 Up 10:26:55 - 10:47:53 -638
Yuma 10:37:10 -39.4 Dark Down 45.2 295.5 Up 10:26:41 - 10:47:39 -642

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 2022/01/17 23:37:36 UT

Marc W. Buie, Southwest Research Institute

RECON