RECON: TNO occultation with 523644

Event between (523644) 10VX11 and star GA0900:01690179 with event index number of 1631598

Geocentric closest approach at 2026/11/15 12:10:11 UTC

J2000 position of star is 06:41:07.3 +01:20:07
Equinox of date position of star is 06:42:08.2 +01:18:56
Stellar brightness G=14.5, use SENSEUP=128
Star is 149 degrees from the moon. Moon is 32% illuminated.
TNO apparent brightness V=21.0

[RECON map]
TNO is 28.2 AU from the Sun and 27.6 AU from the Earth.
The TNO is moving 15.8 km/sec on the sky relative to the star, or, 2.8 arcsec/hr.
The 1-sigma error in the time of the event is 694 seconds.
The 1-sigma cross-track error in the shadow position is 2899 km.
The sky-plane scale is 20009.6 km/arcsec.

The TNO has an absolute magnitude Hv=6.4
Diameter=316.2 km assuming a 5% albedo -- 20.0 sec chord
Diameter=129.1 km assuming a 30% albedo -- 8.2 sec chord
Dynamical classification is 3:2E+6:4II
 
 
 
 
 
 

Star training set for 523644, (2026/11/15 12:10UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:37.6 +07:24:35  0.4 12.96 143
Alhena         06:39:15.8 +16:22:27  1.9 15.09 156
PPM 150940     06:40:01.8 +01:35:16  6.2  0.68 149
PPM 151057     06:42:49.1 +00:55:48  7.2  0.39 149
PPM 151046     06:42:32.1 +01:09:14  9.0  0.15 149
523644         06:42:30.7 +01:18:30 14.5       149
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 1.3 sigma about the mid-time.
The median site spacing is 18.5 km RECON observability=1.0 and success probability=14.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 12:07:05 -29.3 Dark Down 39.4 201.8 Up 11:52:05 - 12:22:05 -980
Summerland 12:07:06 -29.5 Dark Down 39.7 201.6 Up 11:52:06 - 12:22:06 -995
Penticton 12:07:06 -29.5 Dark Down 39.8 201.7 Up 11:52:06 - 12:22:06 -1003
Okanagan Falls 12:07:06 -29.5 Dark Down 40.0 201.8 Up 11:52:06 - 12:22:06 -1017
Oliver 12:07:06 -29.5 Dark Down 40.1 201.8 Up 11:52:06 - 12:22:06 -1030
Anarchist Mountain Observatory 12:07:06 -29.4 Dark Down 40.2 202.1 Up 11:52:06 - 12:22:06 -1049
Oroville 12:07:05 -29.4 Dark Down 40.3 202.1 Up 11:52:05 - 12:22:05 -1053
Tonasket 12:07:06 -29.5 Dark Down 40.5 202.1 Up 11:52:06 - 12:22:06 -1071
Okanogan 12:07:06 -29.6 Dark Down 40.9 202.1 Up 11:52:06 - 12:22:06 -1094
Brewster 12:07:08 -29.7 Dark Down 41.2 201.9 Up 11:52:08 - 12:22:08 -1109
Manson/Chelan 12:07:09 -30.0 Dark Down 41.4 201.5 Up 11:52:09 - 12:22:09 -1116
Wenatchee 12:07:10 -30.1 Dark Down 41.9 201.4 Up 11:52:10 - 12:22:10 -1149
Ellensburg 12:07:11 -30.3 Dark Down 42.4 201.3 Up 11:52:11 - 12:22:11 -1176
Yakima 12:07:11 -30.4 Dark Down 42.8 201.4 Up 11:52:11 - 12:22:11 -1208
Toppenish/White Swan 12:07:11 -30.3 Dark Down 42.9 201.7 Up 11:52:11 - 12:22:11 -1230
Goldendale 12:07:13 -30.6 Dark Down 43.5 201.3 Up 11:52:13 - 12:22:13 -1262
The Dalles 12:07:15 -30.9 Dark Down 43.8 200.9 Up 11:52:15 - 12:22:15 -1270
Pasco 12:07:05 -29.4 Dark Down 42.7 203.4 Up 11:52:05 - 12:22:05 -1275
PNWRO 12:07:05 -29.3 Dark Down 42.9 203.8 Up 11:52:05 - 12:22:05 -1302
Maupin 12:07:15 -30.8 Dark Down 44.2 201.2 Up 11:52:15 - 12:22:15 -1307
Madras/Culver 12:07:16 -30.9 Dark Down 44.7 201.4 Up 11:52:16 - 12:22:16 -1351
Sisters 12:07:17 -31.2 Dark Down 45.1 200.9 Up 11:52:17 - 12:22:17 -1365
Redmond 12:07:16 -31.0 Dark Down 45.1 201.4 Up 11:52:16 - 12:22:16 -1379
Bend 12:07:17 -31.1 Dark Down 45.3 201.3 Up 11:52:17 - 12:22:17 -1392
Oregon Observatory 12:07:18 -31.2 Dark Down 45.5 201.2 Up 11:52:18 - 12:22:18 -1403
La Pine/Gilchrist 12:07:18 -31.2 Dark Down 45.7 201.2 Up 11:52:18 - 12:22:18 -1418
North Lake 12:07:16 -30.8 Dark Down 45.9 202.2 Up 11:52:16 - 12:22:16 -1472
Chiloquin 12:07:20 -31.6 Dark Down 46.8 201.1 Up 11:52:20 - 12:22:20 -1500
Paisley 12:07:15 -30.6 Dark Down 46.4 202.9 Up 11:52:15 - 12:22:15 -1529
Klamath Falls 12:07:20 -31.5 Dark Down 47.1 201.4 Up 11:52:20 - 12:22:20 -1531
Tulelake 12:07:19 -31.3 Dark Down 47.3 201.9 Up 11:52:19 - 12:22:19 -1563
Lakeview 12:07:14 -30.5 Dark Down 46.8 203.4 Up 11:52:14 - 12:22:14 -1578
Cedarville 12:07:15 -30.4 Dark Down 47.3 203.9 Up 11:52:15 - 12:22:15 -1640
Fall River/Burney 12:07:20 -31.3 Dark Down 48.1 202.4 Up 11:52:20 - 12:22:20 -1643
Susanville 12:07:17 -30.7 Dark Down 48.5 203.7 Up 11:52:17 - 12:22:17 -1721
Greenville 12:07:19 -31.0 Dark Down 48.8 203.4 Up 11:52:19 - 12:22:19 -1735
Gimple 12:07:19 -30.9 Dark Down 48.8 203.6 Up 11:52:19 - 12:22:19 -1738
Quincy 12:07:19 -31.0 Dark Down 49.0 203.5 Up 11:52:19 - 12:22:19 -1753
Portola 12:07:17 -30.6 Dark Down 49.0 204.3 Up 11:52:17 - 12:22:17 -1779
Reno 12:07:14 -30.1 Dark Down 49.0 205.3 Up 11:52:14 - 12:22:14 -1823
Carson City 12:07:15 -30.1 Dark Down 49.3 205.5 Up 11:52:15 - 12:22:15 -1855
Gardnerville 12:07:15 -30.1 Dark Down 49.5 205.7 Up 11:52:15 - 12:22:15 -1878
Yerington 12:07:11 -29.6 Dark Down 49.3 206.5 Up 11:52:11 - 12:22:11 -1892
Hawthorne 12:07:09 -29.2 Dark Down 49.5 207.5 Up 11:52:09 - 12:22:09 -1951
Lee Vining 12:07:13 -29.6 Dark Down 50.2 207.2 Up 11:52:13 - 12:22:13 -1986
Tonopah 12:07:04 -28.1 Dark Down 49.4 209.8 Up 11:52:04 - 12:22:04 -2038
Bishop 12:07:09 -29.0 Dark Down 50.5 208.5 Up 11:52:09 - 12:22:09 -2063
Lone Pine 12:07:09 -28.7 Dark Down 51.0 209.5 Up 11:52:09 - 12:22:09 -2143
Beatty 12:07:02 -27.7 Dark Down 50.2 211.1 Up 11:52:02 - 12:22:02 -2157
CPSLO 12:07:23 -30.7 Dark Down 53.1 206.4 Up 11:52:23 - 12:22:23 -2175
SwRI 12:06:08 -19.2 Dark Down 42.4 223.5 Up 11:51:08 - 12:21:08 -2214
Indian Springs 12:06:57 -26.8 Dark Down 50.0 212.8 Up 11:51:57 - 12:21:57 -2222
Henderson 12:06:54 -26.2 Dark Down 50.2 214.1 Up 11:51:54 - 12:21:54 -2294
Searchlight/Boulder City 12:06:54 -26.1 Dark Down 50.6 214.6 Up 11:51:54 - 12:21:54 -2349
Wildwood 12:07:15 -29.0 Dark Down 53.4 210.3 Up 11:52:15 - 12:22:15 -2356
Patrick 12:06:49 -25.3 Dark Down 50.2 216.1 Up 11:51:49 - 12:21:49 -2388
Laughlin/Bullhead City 12:06:53 -25.8 Dark Down 50.7 215.3 Up 11:51:53 - 12:21:53 -2388
Kingman/Dolan Springs 12:06:50 -25.4 Dark Down 50.5 216.0 Up 11:51:50 - 12:21:50 -2403
Mohave Valley 12:06:53 -25.8 Dark Down 50.9 215.5 Up 11:51:53 - 12:21:53 -2414
Idyllwild 12:07:04 -27.4 Dark Down 52.9 213.3 Up 11:52:04 - 12:22:04 -2453
Lake Havasu City 12:06:52 -25.6 Dark Down 51.1 216.1 Up 11:51:52 - 12:21:52 -2460
Parker 12:06:52 -25.5 Dark Down 51.4 216.4 Up 11:51:52 - 12:21:52 -2494
Blythe 12:06:55 -25.7 Dark Down 52.0 216.4 Up 11:51:55 - 12:21:55 -2534
Calipatria 12:06:59 -26.4 Dark Down 52.8 215.5 Up 11:51:59 - 12:21:59 -2550
George/Scottsdale 12:06:41 -23.5 Dark Down 50.5 220.0 Up 11:51:41 - 12:21:41 -2613
Yuma 12:06:55 -25.6 Dark Down 52.7 217.1 Up 11:51:55 - 12:21:55 -2621

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 523644, (2026/11/15 12:10UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 12.96 143
Alhena         06:37:42.8 +16:23:57  1.9 15.09 156
PPM 150940     06:38:38.2 +01:36:48  6.2  0.68 149
PPM 151057     06:41:25.9 +00:57:26  7.2  0.39 149
PPM 151046     06:41:08.7 +01:10:52  9.0  0.15 149
523644         06:41:07.3 +01:20:07 14.5       149
Positions are for J2000

Event circumstances last updated at 2019/08/07 20:17:52 UT

Marc W. Buie, Southwest Research Institute

RECON