RECON: TNO occultation with 523761

Event between (523761) 14WU509 and star GA0920:01519325 with event index number of 1633118

Geocentric closest approach at 2026/11/14 11:15:10 UTC

J2000 position of star is 06:31:38.1 +03:22:34
Equinox of date position of star is 06:32:41.0 +03:21:38
Stellar brightness G=16.0, use SENSEUP=128
Star is 155 degrees from the moon. Moon is 23% illuminated.
TNO apparent brightness V=22.0

[RECON map]
TNO is 40.2 AU from the Sun and 39.6 AU from the Earth.
The TNO is moving 17.8 km/sec on the sky relative to the star, or, 2.2 arcsec/hr.
The 1-sigma error in the time of the event is 390 seconds.
The 1-sigma cross-track error in the shadow position is 2059 km.
The sky-plane scale is 28720.3 km/arcsec.

The TNO has an absolute magnitude Hv=5.9
Diameter=398.1 km assuming a 5% albedo -- 22.3 sec chord
Diameter=162.5 km assuming a 30% albedo -- 9.1 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 523761, (2026/11/14 11:15UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:37.6 +07:24:35  0.4  9.93 152
Alhena         06:39:15.8 +16:22:27  1.9 13.11 166
PPM 150835     06:37:25.5 +04:28:27  6.1  1.56 156
PPM 150671     06:32:45.8 +02:53:25  7.6  0.47 154
PPM 150689     06:33:11.4 +03:32:27  9.1  0.19 155
523761         06:33:02.9 +03:21:18 16.0       155
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 2.3 sigma about the mid-time.
The median site spacing is 21.0 km RECON observability=1.0 and success probability=15.8%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Clarence Fulton 11:13:19 -37.4 Dark Down 43.0 186.4 Up 10:58:19 - 11:28:19 -1564
Victoria 11:13:37 -40.4 Dark Down 44.9 180.9 Up 10:58:37 - 11:28:37 -1585
Kelowna 11:13:20 -37.6 Dark Down 43.4 186.2 Up 10:58:20 - 11:28:20 -1588
Summerland 11:13:22 -37.8 Dark Down 43.6 186.0 Up 10:58:22 - 11:28:22 -1602
Penticton 11:13:22 -37.8 Dark Down 43.7 186.1 Up 10:58:22 - 11:28:22 -1610
Oliver 11:13:22 -37.9 Dark Down 44.0 186.2 Up 10:58:22 - 11:28:22 -1636
Anarchist Mountain Observatory 11:13:21 -37.8 Dark Down 44.2 186.5 Up 10:58:21 - 11:28:21 -1654
Tonasket 11:13:22 -37.9 Dark Down 44.5 186.4 Up 10:58:22 - 11:28:22 -1675
Okanogan 11:13:22 -38.1 Dark Down 44.9 186.2 Up 10:58:22 - 11:28:22 -1697
Brewster 11:13:24 -38.3 Dark Down 45.1 186.0 Up 10:58:24 - 11:28:24 -1712
Manson/Chelan 11:13:25 -38.6 Dark Down 45.4 185.5 Up 10:58:25 - 11:28:25 -1718
Entiat 11:13:25 -38.7 Dark Down 45.6 185.4 Up 10:58:25 - 11:28:25 -1733
Wenatchee 11:13:27 -38.9 Dark Down 45.8 185.3 Up 10:58:27 - 11:28:27 -1750
Ellensburg 11:13:28 -39.1 Dark Down 46.3 185.0 Up 10:58:28 - 11:28:28 -1775
Yakima 11:13:28 -39.2 Dark Down 46.7 185.0 Up 10:58:28 - 11:28:28 -1806
Toppenish/White Swan 11:13:29 -39.2 Dark Down 46.9 185.3 Up 10:58:29 - 11:28:29 -1828
Goldendale 11:13:31 -39.6 Dark Down 47.5 184.8 Up 10:58:31 - 11:28:31 -1859
The Dalles 11:13:32 -39.9 Dark Down 47.7 184.2 Up 10:58:32 - 11:28:32 -1867
Pasco 11:13:23 -38.4 Dark Down 46.9 187.2 Up 10:58:23 - 11:28:23 -1872
PNWRO 11:13:23 -38.3 Dark Down 47.1 187.5 Up 10:58:23 - 11:28:23 -1897
Maupin 11:13:33 -39.9 Dark Down 48.1 184.4 Up 10:58:33 - 11:28:33 -1902
Sisters 11:13:36 -40.5 Dark Down 49.0 183.8 Up 10:58:36 - 11:28:36 -1957
Redmond 11:13:34 -40.2 Dark Down 49.0 184.4 Up 10:58:34 - 11:28:34 -1971
Bend 11:13:36 -40.4 Dark Down 49.2 184.2 Up 10:58:36 - 11:28:36 -1984
Oregon Observatory 11:13:36 -40.5 Dark Down 49.4 184.0 Up 10:58:36 - 11:28:36 -1994
La Pine/Gilchrist 11:13:37 -40.6 Dark Down 49.6 183.9 Up 10:58:37 - 11:28:37 -2009
North Lake 11:13:34 -40.3 Dark Down 50.0 184.9 Up 10:58:34 - 11:28:34 -2061
Paisley 11:13:34 -40.2 Dark Down 50.6 185.5 Up 10:58:34 - 11:28:34 -2116
Klamath Falls 11:13:40 -41.1 Dark Down 51.1 183.7 Up 10:58:40 - 11:28:40 -2118
Lakeview 11:13:34 -40.1 Dark Down 51.0 185.9 Up 10:58:34 - 11:28:34 -2163
Cedarville 11:13:34 -40.1 Dark Down 51.7 186.3 Up 10:58:34 - 11:28:34 -2223
Fall River/Burney 11:13:40 -41.1 Dark Down 52.3 184.4 Up 10:58:40 - 11:28:40 -2227
Susanville 11:13:38 -40.7 Dark Down 52.8 185.6 Up 10:58:38 - 11:28:38 -2302
Greenville 11:13:38 -41.0 Dark Down 53.1 185.2 Up 10:58:38 - 11:28:38 -2316
Gimple 11:13:40 -40.9 Dark Down 53.1 185.3 Up 10:58:40 - 11:28:40 -2319
Quincy 11:13:40 -41.0 Dark Down 53.3 185.2 Up 10:58:40 - 11:28:40 -2334
Portola 11:13:38 -40.7 Dark Down 53.4 186.0 Up 10:58:38 - 11:28:38 -2358
Reno 11:13:36 -40.2 Dark Down 53.6 187.2 Up 10:58:36 - 11:28:36 -2401
Carson City 11:13:36 -40.3 Dark Down 54.0 187.3 Up 10:58:36 - 11:28:36 -2432
Gardnerville 11:13:36 -40.3 Dark Down 54.2 187.4 Up 10:58:36 - 11:28:36 -2455
Yerington 11:13:34 -39.8 Dark Down 54.1 188.4 Up 10:58:34 - 11:28:34 -2468
Hawthorne 11:13:32 -39.5 Dark Down 54.5 189.3 Up 10:58:32 - 11:28:32 -2525
Lee Vining 11:13:35 -39.9 Dark Down 55.1 188.6 Up 10:58:35 - 11:28:35 -2559
Tonopah 11:13:26 -38.5 Dark Down 54.8 191.8 Up 10:58:26 - 11:28:26 -2609
Bishop 11:13:33 -39.4 Dark Down 55.6 190.0 Up 10:58:33 - 11:28:33 -2634
Beatty 11:13:26 -38.2 Dark Down 55.8 193.0 Up 10:58:26 - 11:28:26 -2726
CPSLO 11:13:47 -41.4 Dark Down 57.9 186.5 Up 10:58:47 - 11:28:47 -2745
Niwot 11:12:31 -29.2 Dark Down 49.6 209.5 Up 10:57:31 - 11:27:31 -2776
SwRI 11:12:33 -29.3 Dark Down 49.7 209.4 Up 10:57:33 - 11:27:33 -2783
Indian Springs 11:13:22 -37.4 Dark Down 55.9 195.0 Up 10:58:22 - 11:28:22 -2789
Henderson 11:13:19 -36.9 Dark Down 56.3 196.4 Up 10:58:19 - 11:28:19 -2859
Searchlight/Boulder City 11:13:19 -36.9 Dark Down 56.8 196.7 Up 10:58:19 - 11:28:19 -2913
Wildwood 11:13:39 -39.9 Dark Down 58.9 190.6 Up 10:58:39 - 11:28:39 -2921
Patrick 11:13:15 -36.0 Dark Down 56.6 198.6 Up 10:58:15 - 11:28:15 -2950
Laughlin/Bullhead City 11:13:18 -36.6 Dark Down 57.0 197.5 Up 10:58:18 - 11:28:18 -2951
Kingman/Dolan Springs 11:13:16 -36.2 Dark Down 56.9 198.4 Up 10:58:16 - 11:28:16 -2965
Mohave Valley 11:13:19 -36.6 Dark Down 57.3 197.6 Up 10:58:19 - 11:28:19 -2976
DCO 11:13:10 -35.5 Dark Down 56.7 199.9 Up 10:58:10 - 11:28:10 -3001
Idyllwild 11:13:31 -38.4 Dark Down 58.9 194.3 Up 10:58:31 - 11:28:31 -3014
Lake Havasu City 11:13:18 -36.4 Dark Down 57.6 198.2 Up 10:58:18 - 11:28:18 -3021
Parker 11:13:18 -36.4 Dark Down 57.9 198.5 Up 10:58:18 - 11:28:18 -3054
Blythe 11:13:19 -36.7 Dark Down 58.5 198.2 Up 10:58:19 - 11:28:19 -3094
Calipatria 11:13:26 -37.4 Dark Down 59.2 196.7 Up 10:58:26 - 11:28:26 -3110
George/Scottsdale 11:13:07 -34.4 Dark Down 57.6 203.0 Up 10:58:07 - 11:28:07 -3171
Yuma 11:13:22 -36.7 Dark Down 59.4 198.6 Up 10:58:22 - 11:28:22 -3179

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 523761, (2026/11/14 11:15UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  9.93 152
Alhena         06:37:42.8 +16:23:57  1.9 13.11 166
PPM 150835     06:36:00.1 +04:29:53  6.1  1.56 156
PPM 150671     06:31:21.3 +02:54:41  7.6  0.47 154
PPM 150689     06:31:46.5 +03:33:43  9.1  0.19 155
523761         06:31:38.1 +03:22:34 16.0       155
Positions are for J2000

Event circumstances last updated at 2019/12/10 23:20:17 UT

Marc W. Buie, Southwest Research Institute

RECON