RECON: TNO occultation with 468861

Event between (468861) 13LU28 and star GA1100:01881668 with event index number of 2655647

Geocentric closest approach at 2026/01/05 08:23:03 UTC

J2000 position of star is 06:16:42.0 +21:44:40
Equinox of date position of star is 06:18:09.8 +21:44:03
Stellar brightness G=14.1, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 38 degrees from the moon. Moon is 95% illuminated.
Apparent brightness V=17.9

[RECON map]
Object is 9.3 AU from the Sun and 8.3 AU from the Earth.
Apparent velocity is 38.8 km/sec on the sky relative to the star, or, 23.1 arcsec/hr.
The 1-sigma error in the time of the event is 9 seconds.
The 1-sigma cross-track error in the shadow position is 743 km.
The sky-plane scale is 6045.7 km/arcsec.

The object has an absolute magnitude Hv=8.3
Diameter=128.2 km assuming a 5% albedo -- 3.4 sec chord
Diameter=52.4 km assuming a 30% albedo -- 1.4 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 468861, (2026/01/05 08:23UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:34.9 +07:24:35  0.4 15.25  46
Alhena         06:39:12.9 +16:22:29  1.9  7.29  33
7Eta Gem       06:16:27.0 +22:29:48  4.5  0.87  38
PPM 095712     06:18:54.4 +22:07:57  8.5  0.43  37
PPM 095684     06:17:41.8 +21:41:14  9.8  0.14  38
468861         06:18:15.8 +21:44:00 14.1        37
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 35.8 km RECON observability=1.0 and success probability=0.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 08:21:53 -57.4 Dark Up 51.7 229.2 Up 08:20:37 - 08:23:10 4612
Kamloops 08:22:17 -61.8 Dark Up 58.5 209.3 Up 08:21:00 - 08:23:33 4557
Kelowna 08:22:15 -62.5 Dark Up 58.9 211.5 Up 08:20:59 - 08:23:32 4468
Peachland 08:22:16 -62.6 Dark Up 59.1 211.0 Up 08:20:59 - 08:23:32 4459
Summerland 08:22:16 -62.8 Dark Up 59.2 211.3 Up 08:20:59 - 08:23:32 4444
Penticton 08:22:15 -62.8 Dark Up 59.2 211.6 Up 08:20:59 - 08:23:32 4436
Oliver 08:22:15 -63.2 Dark Up 59.5 211.9 Up 08:20:59 - 08:23:32 4401
Anarchist Mountain Observatory 08:22:15 -63.3 Dark Up 59.6 212.4 Up 08:20:58 - 08:23:31 4382
Victoria 08:22:22 -64.1 Dark Up 61.3 205.7 Up 08:21:06 - 08:23:39 4375
Okanogan 08:22:15 -64.0 Dark Up 60.2 212.6 Up 08:20:59 - 08:23:32 4319
Brewster 08:22:16 -64.3 Dark Up 60.5 212.5 Up 08:20:59 - 08:23:32 4293
Manson/Chelan 08:22:16 -64.5 Dark Up 60.8 212.1 Up 08:21:00 - 08:23:33 4276
Wenatchee 08:22:17 -65.0 Dark Up 61.3 212.2 Up 08:21:00 - 08:23:33 4230
Ellensburg 08:22:17 -65.4 Dark Up 61.7 212.2 Up 08:21:01 - 08:23:34 4190
Yakima 08:22:17 -65.8 Dark Up 62.1 212.6 Up 08:21:01 - 08:23:34 4149
Toppenish/White Swan 08:22:17 -66.0 Dark Up 62.2 213.1 Up 08:21:00 - 08:23:33 4125
PNWRO 08:22:14 -66.2 Dark Up 61.9 216.2 Up 08:20:58 - 08:23:31 4072
The Dalles 08:22:19 -66.9 Dark Up 63.1 212.5 Up 08:21:02 - 08:23:35 4054
Maupin 08:22:18 -67.3 Dark Up 63.4 213.2 Up 08:21:02 - 08:23:35 4009
Sisters 08:22:20 -68.2 Dark Up 64.4 213.2 Up 08:21:03 - 08:23:36 3924
Bend 08:22:19 -68.4 Dark Up 64.5 214.0 Up 08:21:02 - 08:23:35 3897
Oregon Observatory 08:22:19 -68.6 Dark Up 64.7 213.9 Up 08:21:03 - 08:23:36 3880
Chiloquin 08:22:20 -69.9 Dark Up 65.9 214.7 Up 08:21:04 - 08:23:37 3748
Klamath Falls 08:22:20 -70.3 Dark Up 66.2 215.3 Up 08:21:04 - 08:23:37 3712
Cedarville 08:22:17 -70.8 Dark Up 66.0 219.5 Up 08:21:01 - 08:23:34 3620
Fall River/Burney 08:22:20 -71.4 Dark Up 66.9 217.7 Up 08:21:03 - 08:23:36 3583
Greenville 08:22:19 -72.2 Dark Up 67.4 220.0 Up 08:21:02 - 08:23:35 3482
Gimple 08:22:19 -72.2 Dark Up 67.4 220.2 Up 08:21:02 - 08:23:35 3481
Quincy 08:22:19 -72.4 Dark Up 67.6 220.3 Up 08:21:02 - 08:23:35 3460
Portola 08:22:18 -72.5 Dark Up 67.4 221.5 Up 08:21:02 - 08:23:35 3442
Reno 08:22:17 -72.6 Dark Up 67.3 223.2 Up 08:21:00 - 08:23:33 3406
Dunrhomin 08:21:47 -66.2 Dark Up 57.9 244.2 Up 08:20:30 - 08:23:03 3382
Carson City 08:22:17 -73.0 Dark Up 67.6 223.8 Up 08:21:00 - 08:23:33 3367
Nikitin 08:21:47 -66.3 Dark Up 57.9 244.5 Up 08:20:30 - 08:23:03 3362
CU-SBO 08:21:47 -66.4 Dark Up 58.0 244.5 Up 08:20:31 - 08:23:04 3355
Gardnerville 08:22:17 -73.2 Dark Up 67.7 224.3 Up 08:21:00 - 08:23:33 3341
Yerington 08:22:15 -73.0 Dark Up 67.3 225.4 Up 08:20:59 - 08:23:32 3339
Hawthorne 08:22:14 -73.4 Dark Up 67.4 227.2 Up 08:20:58 - 08:23:31 3284
Lee Vining 08:22:15 -74.0 Dark Up 68.0 227.3 Up 08:20:59 - 08:23:32 3229
Bishop 08:22:14 -74.4 Dark Up 68.0 229.8 Up 08:20:57 - 08:23:30 3157
Beatty 08:22:10 -74.3 Dark Up 67.3 233.6 Up 08:20:54 - 08:23:27 3090
Patrick 08:22:04 -74.3 Dark Up 66.1 241.1 Up 08:20:48 - 08:23:21 2902
Laughlin/Bullhead City 08:22:06 -74.9 Dark Up 66.7 240.5 Up 08:20:49 - 08:23:22 2882
Lake Havasu City 08:22:05 -75.3 Dark Up 66.9 242.3 Up 08:20:49 - 08:23:22 2806
Wildwood 08:22:15 -77.5 Dark Up 70.1 236.2 Up 08:20:58 - 08:23:31 2805
Idyllwild 08:22:11 -77.1 Dark Up 69.0 240.3 Up 08:20:54 - 08:23:27 2746
George/Scottsdale 08:22:00 -74.5 Dark Up 65.4 247.2 Up 08:20:43 - 08:23:16 2702
Calipatria 08:22:08 -77.0 Dark Up 68.4 243.5 Up 08:20:52 - 08:23:25 2668
Yuma 08:22:06 -76.8 Dark Up 67.9 245.8 Up 08:20:50 - 08:23:23 2612

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, (2026/01/05 08:23UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 15.25  46
Alhena         06:37:42.8 +16:23:56  1.9  7.29  33
7Eta Gem       06:14:52.6 +22:30:24  4.5  0.87  38
PPM 095712     06:17:20.4 +22:08:38  8.5  0.43  37
PPM 095684     06:16:08.0 +21:41:53  9.8  0.14  38
468861         06:16:42.0 +21:44:40 14.1        37
Positions are for J2000

Event circumstances last updated at 2024/05/05 03:33:21 UT

Marc W. Buie, Southwest Research Institute

RECON