RECON: TNO occultation with 468861

Event between (468861) 13LU28 and star GA1120:02511583 with event index number of 2655538

Geocentric closest approach at 2025/11/04 11:38:51 UTC

J2000 position of star is 06:52:55.7 +23:52:48
Equinox of date position of star is 06:54:17.5 +23:51:04
Stellar brightness G=14.2, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 75 degrees from the moon. Moon is 98% illuminated.
TNO apparent brightness V=18.3

[RECON map]
TNO is 9.2 AU from the Sun and 8.7 AU from the Earth.
The TNO is moving 25.6 km/sec on the sky relative to the star, or, 14.7 arcsec/hr.
The 1-sigma error in the time of the event is 45 seconds.
The 1-sigma cross-track error in the shadow position is 3030 km.
The sky-plane scale is 6278.7 km/arcsec.

The TNO has an absolute magnitude Hv=8.4
Diameter=128.2 km assuming a 5% albedo -- 5.0 sec chord
Diameter=52.4 km assuming a 30% albedo -- 2.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 468861, (2025/11/04 11:39UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:53.8 +27:57:42  1.1 12.47  86
Alhena         06:39:12.3 +16:22:30  1.9  8.29  73
37 Gem         06:56:53.9 +25:20:28  6.3  1.59  75
PPM 096653     06:53:34.1 +23:34:08  6.9  0.35  75
PPM 096704     06:55:29.1 +23:53:30  9.5  0.23  75
PPM 096664     06:54:10.6 +23:46:09 11.0  0.11  75
468861         06:54:30.0 +23:50:48 14.2        75
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 28.5 km RECON observability=1.0 and success probability=17.2%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 11:38:29 -31.8 Dark Up 62.9 169.9 Up 11:34:13 - 11:42:45 2182
Kelowna 11:38:28 -31.5 Dark Up 63.8 171.5 Up 11:34:12 - 11:42:44 2085
Peachland 11:38:29 -31.7 Dark Up 63.9 170.8 Up 11:34:13 - 11:42:45 2082
Summerland 11:38:29 -31.7 Dark Up 64.1 171.0 Up 11:34:13 - 11:42:45 2066
Victoria 11:38:40 -34.3 Dark Up 64.6 162.7 Up 11:34:24 - 11:42:56 2065
Penticton 11:38:29 -31.6 Dark Up 64.1 171.2 Up 11:34:13 - 11:42:45 2057
Oliver 11:38:29 -31.7 Dark Up 64.5 171.1 Up 11:34:13 - 11:42:45 2024
Sleaford 11:37:50 -22.8 Dark Up 60.9 197.7 Up 11:33:34 - 11:42:06 2007
Anarchist Mountain Observatory 11:38:29 -31.6 Dark Up 64.7 171.4 Up 11:34:13 - 11:42:45 2004
Tonasket 11:38:29 -31.7 Dark Up 65.0 171.2 Up 11:34:13 - 11:42:45 1976
Okanogan 11:38:30 -31.9 Dark Up 65.3 170.7 Up 11:34:14 - 11:42:46 1949
Brewster 11:38:31 -32.1 Dark Up 65.5 170.2 Up 11:34:15 - 11:42:47 1929
Manson/Chelan 11:38:32 -32.4 Dark Up 65.7 169.3 Up 11:34:16 - 11:42:48 1919
Wenatchee 11:38:33 -32.6 Dark Up 66.1 168.8 Up 11:34:17 - 11:42:49 1879
Ellensburg 11:38:35 -32.8 Dark Up 66.5 168.1 Up 11:34:19 - 11:42:51 1846
Yakima 11:38:36 -32.9 Dark Up 66.9 167.9 Up 11:34:20 - 11:42:52 1808
Toppenish/White Swan 11:38:36 -32.9 Dark Up 67.1 168.1 Up 11:34:20 - 11:42:52 1782
Goldendale 11:38:37 -33.3 Dark Up 67.6 166.9 Up 11:34:21 - 11:42:53 1742
The Dalles 11:38:39 -33.6 Dark Up 67.8 165.9 Up 11:34:23 - 11:42:55 1730
PNWRO 11:38:32 -31.9 Dark Up 67.7 171.5 Up 11:34:16 - 11:42:48 1707
Maupin 11:38:39 -33.6 Dark Up 68.2 165.9 Up 11:34:23 - 11:42:55 1688
Sisters 11:38:42 -34.1 Dark Up 69.0 164.1 Up 11:34:26 - 11:42:58 1618
Bend 11:38:42 -34.0 Dark Up 69.3 164.6 Up 11:34:26 - 11:42:58 1587
Oregon Observatory 11:38:42 -34.1 Dark Up 69.4 164.2 Up 11:34:26 - 11:42:58 1575
North Lake 11:38:42 -33.8 Dark Up 70.1 165.1 Up 11:34:26 - 11:42:58 1497
Chiloquin 11:38:46 -34.6 Dark Up 70.6 162.1 Up 11:34:30 - 11:43:02 1460
Klamath Falls 11:38:46 -34.6 Dark Up 70.9 162.0 Up 11:34:30 - 11:43:02 1424
Lakeview 11:38:42 -33.6 Dark Up 71.2 165.8 Up 11:34:26 - 11:42:58 1378
Cedarville 11:38:42 -33.6 Dark Up 71.9 165.9 Up 11:34:26 - 11:42:58 1309
Fall River/Burney 11:38:47 -34.6 Dark Up 72.1 162.0 Up 11:34:31 - 11:43:03 1298
Susanville 11:38:45 -34.1 Dark Up 72.9 163.6 Up 11:34:29 - 11:43:01 1214
Greenville 11:38:47 -34.4 Dark Up 73.1 162.4 Up 11:34:31 - 11:43:03 1195
Gimple 11:38:47 -34.3 Dark Up 73.1 162.7 Up 11:34:31 - 11:43:03 1192
Quincy 11:38:47 -34.4 Dark Up 73.3 162.2 Up 11:34:31 - 11:43:03 1175
Portola 11:38:46 -34.1 Dark Up 73.5 163.6 Up 11:34:30 - 11:43:02 1148
Reno 11:38:44 -33.6 Dark Up 73.9 165.4 Up 11:34:28 - 11:43:00 1102
Carson City 11:38:45 -33.6 Dark Up 74.3 165.1 Up 11:34:29 - 11:43:01 1066
Gardnerville 11:38:45 -33.6 Dark Up 74.5 165.1 Up 11:34:29 - 11:43:01 1040
Yerington 11:38:43 -33.2 Dark Up 74.6 167.0 Up 11:34:27 - 11:42:59 1027
Hawthorne 11:38:42 -32.8 Dark Up 75.1 168.5 Up 11:34:26 - 11:42:58 965
Lee Vining 11:38:45 -33.2 Dark Up 75.6 166.3 Up 11:34:29 - 11:43:01 923
Tonopah 11:38:38 -31.8 Dark Up 75.7 173.2 Up 11:34:22 - 11:42:54 876
Bishop 11:38:43 -32.7 Dark Up 76.3 168.5 Up 11:34:27 - 11:42:59 841
Dunrhomin 11:37:57 -22.5 Dark Up 71.6 210.4 Up 11:33:41 - 11:42:13 798
CU-SBO 11:37:58 -22.6 Dark Up 71.8 210.5 Up 11:33:42 - 11:42:14 774
Beatty 11:38:38 -31.5 Dark Up 76.9 174.5 Up 11:34:22 - 11:42:54 745
Indian Springs 11:38:35 -30.7 Dark Up 77.3 178.8 Up 11:34:19 - 11:42:51 680
Henderson 11:38:34 -30.1 Dark Up 77.8 181.7 Up 11:34:18 - 11:42:50 606
Wildwood 11:38:49 -33.1 Dark Up 79.4 164.1 Up 11:34:33 - 11:43:05 515
Patrick 11:38:31 -29.2 Dark Up 78.4 186.9 Up 11:34:15 - 11:42:47 509
Laughlin/Bullhead City 11:38:34 -29.8 Dark Up 78.7 183.8 Up 11:34:18 - 11:42:50 504
Kingman/Dolan Springs 11:38:32 -29.4 Dark Up 78.6 186.1 Up 11:34:16 - 11:42:48 491
Mohave Valley 11:38:34 -29.8 Dark Up 79.0 183.9 Up 11:34:18 - 11:42:50 476
Lake Havasu City 11:38:34 -29.6 Dark Up 79.3 185.3 Up 11:34:18 - 11:42:50 427
Idyllwild 11:38:43 -31.6 Dark Up 80.1 173.1 Up 11:34:27 - 11:42:59 419
Parker 11:38:34 -29.6 Dark Up 79.7 185.6 Up 11:34:18 - 11:42:50 390
Calipatria 11:38:40 -30.6 Dark Up 80.8 179.3 Up 11:34:24 - 11:42:56 320
George/Scottsdale 11:38:26 -27.6 Dark Up 79.7 198.2 Up 11:34:10 - 11:42:42 276
Yuma 11:38:37 -29.9 Dark Up 81.2 184.6 Up 11:34:21 - 11:42:53 249

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 468861, (2025/11/04 11:39UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 12.47  86
Alhena         06:37:42.8 +16:23:57  1.9  8.29  73
37 Gem         06:55:18.6 +25:22:33  6.3  1.59  75
PPM 096653     06:51:59.9 +23:36:06  6.9  0.35  75
PPM 096704     06:53:54.8 +23:55:32  9.5  0.23  75
PPM 096664     06:52:36.3 +23:48:09 11.0  0.11  75
468861         06:52:55.7 +23:52:48 14.2        75
Positions are for J2000

Event circumstances last updated at 2022/06/07 22:32:29 UT

Marc W. Buie, Southwest Research Institute

RECON