RECON: TNO occultation with 05VA123

Event between 05VA123 and star GA1140:02436261 with event index number of 1988279

Geocentric closest approach at 2026/12/21 04:18:14 UTC

J2000 position of star is 06:40:33.6 +24:26:57
Equinox of date position of star is 06:42:01.4 +24:25:32
Stellar brightness G=15.1, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 50 degrees from the moon. Moon is 88% illuminated.
Apparent brightness V=23.0

[RECON map]
Object is 39.0 AU from the Sun and 38.1 AU from the Earth.
Apparent velocity is 25.1 km/sec on the sky relative to the star, or, 3.3 arcsec/hr.
The 1-sigma error in the time of the event is 364 seconds.
The 1-sigma cross-track error in the shadow position is 1507 km.
The sky-plane scale is 27609.9 km/arcsec.

The object has an absolute magnitude Hv=7.1
Diameter=226.0 km assuming a 5% albedo -- 9.0 sec chord
Diameter=92.2 km assuming a 30% albedo -- 3.7 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 05VA123, (2026/12/21 04:18UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:58.0 +27:57:32  1.1 14.94  64
Alhena         06:39:16.2 +16:22:26  1.9  8.08  52
PPM 096264     06:39:06.4 +24:33:57  6.5  0.72  50
PPM 096322     06:41:10.7 +24:34:28  6.9  0.28  50
PPM 096371     06:42:50.8 +24:37:43  9.1  0.25  51
PPM 096361     06:42:26.7 +24:39:54 10.4  0.25  50
05VA123        06:42:12.7 +24:25:20 15.1        51
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 2.5 sigma about the mid-time.
The median site spacing is 25.8 km RECON observability=1.0 and success probability=0.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 04:20:54 -40.1 Dark Up 34.0 92.0 Up 04:05:54 - 04:35:54 8864
Kelowna 04:20:56 -40.9 Dark Up 34.6 92.2 Up 04:05:56 - 04:35:56 8773
Peachland 04:20:56 -40.7 Dark Up 34.4 91.9 Up 04:05:56 - 04:35:56 8771
Victoria 04:21:04 -38.6 Dark Up 32.1 88.3 Up 04:06:04 - 04:36:04 8757
Summerland 04:20:57 -40.8 Dark Up 34.5 91.9 Up 04:05:57 - 04:35:57 8755
Penticton 04:20:57 -40.9 Dark Up 34.6 91.9 Up 04:05:57 - 04:35:57 8747
Oliver 04:20:58 -40.9 Dark Up 34.6 91.7 Up 04:05:58 - 04:35:58 8716
Anarchist Mountain Observatory 04:20:58 -41.1 Dark Up 34.7 91.7 Up 04:05:58 - 04:35:58 8697
Sleaford 04:20:29 -48.1 Dark Up 42.6 105.4 Up 04:05:29 - 04:35:29 8678
Okanogan 04:21:00 -41.1 Dark Up 34.6 91.1 Up 04:06:00 - 04:36:00 8646
Brewster 04:21:02 -41.0 Dark Up 34.5 90.8 Up 04:06:02 - 04:36:02 8627
Manson/Chelan 04:21:02 -40.8 Dark Up 34.2 90.3 Up 04:06:02 - 04:36:02 8618
Wenatchee 04:21:04 -40.8 Dark Up 34.1 89.9 Up 04:06:04 - 04:36:04 8580
Ellensburg 04:21:05 -40.7 Dark Up 34.0 89.5 Up 04:06:05 - 04:36:05 8549
Yakima 04:21:06 -40.7 Dark Up 33.9 89.2 Up 04:06:06 - 04:36:06 8514
Toppenish/White Swan 04:21:07 -40.9 Dark Up 34.1 89.2 Up 04:06:07 - 04:36:07 8490
The Dalles 04:21:10 -40.5 Dark Up 33.5 88.1 Up 04:06:10 - 04:36:10 8441
PNWRO 04:21:06 -42.0 Dark Up 35.1 90.0 Up 04:06:06 - 04:36:06 8418
Maupin 04:21:11 -40.6 Dark Up 33.6 87.9 Up 04:06:11 - 04:36:11 8401
Sisters 04:21:13 -40.3 Dark Up 33.2 87.0 Up 04:06:13 - 04:36:13 8335
Bend 04:21:14 -40.6 Dark Up 33.4 87.0 Up 04:06:14 - 04:36:14 8306
Oregon Observatory 04:21:14 -40.5 Dark Up 33.3 86.8 Up 04:06:14 - 04:36:14 8294
Chiloquin 04:21:18 -40.3 Dark Up 32.9 85.7 Up 04:06:18 - 04:36:18 8185
Klamath Falls 04:21:19 -40.4 Dark Up 32.9 85.5 Up 04:06:19 - 04:36:19 8151
Cedarville 04:21:18 -41.6 Dark Up 34.1 86.1 Up 04:06:18 - 04:36:18 8041
Fall River/Burney 04:21:21 -40.7 Dark Up 33.1 85.0 Up 04:06:21 - 04:36:21 8031
Greenville 04:21:23 -41.1 Dark Up 33.4 84.7 Up 04:06:23 - 04:36:23 7932
Gimple 04:21:23 -41.2 Dark Up 33.4 84.7 Up 04:06:23 - 04:36:23 7930
Quincy 04:21:23 -41.1 Dark Up 33.4 84.5 Up 04:06:23 - 04:36:23 7913
Portola 04:21:23 -41.5 Dark Up 33.7 84.7 Up 04:06:23 - 04:36:23 7887
Reno 04:21:23 -42.0 Dark Up 34.2 84.9 Up 04:06:23 - 04:36:23 7843
Carson City 04:21:24 -42.1 Dark Up 34.2 84.7 Up 04:06:24 - 04:36:24 7808
Gardnerville 04:21:23 -42.1 Dark Up 34.2 84.6 Up 04:06:23 - 04:36:23 7783
Yerington 04:21:22 -42.6 Dark Up 34.6 85.0 Up 04:06:22 - 04:36:22 7771
Hawthorne 04:21:22 -43.0 Dark Up 35.0 84.9 Up 04:06:22 - 04:36:22 7711
Lee Vining 04:21:25 -42.7 Dark Up 34.6 84.3 Up 04:06:25 - 04:36:25 7671
Bishop 04:21:25 -43.2 Dark Up 35.1 84.3 Up 04:06:25 - 04:36:25 7591
Dunrhomin 04:20:53 -52.9 Dark Up 45.3 94.9 Up 04:05:53 - 04:35:53 7532
Nikitin 04:20:53 -53.0 Dark Up 45.3 94.7 Up 04:05:53 - 04:35:53 7514
CU-SBO 04:20:53 -52.9 Dark Up 45.3 94.5 Up 04:05:53 - 04:35:53 7509
Beatty 04:21:23 -44.6 Dark Up 36.3 84.8 Up 04:06:23 - 04:36:23 7498
Wildwood 04:21:31 -43.1 Dark Up 34.6 81.9 Up 04:06:31 - 04:36:31 7275
Patrick 04:21:21 -47.0 Dark Up 38.5 85.2 Up 04:06:21 - 04:36:21 7267
Laughlin/Bullhead City 04:21:23 -46.4 Dark Up 37.9 84.7 Up 04:06:23 - 04:36:23 7263
Lake Havasu City 04:21:23 -46.6 Dark Up 38.1 84.3 Up 04:06:23 - 04:36:23 7188
Idyllwild 04:21:29 -44.7 Dark Up 36.1 82.6 Up 04:06:29 - 04:36:29 7182
Calipatria 04:21:27 -45.6 Dark Up 36.9 82.7 Up 04:06:27 - 04:36:27 7085
George/Scottsdale 04:21:20 -48.7 Dark Up 40.0 84.9 Up 04:06:20 - 04:36:20 7039
Yuma 04:21:27 -46.4 Dark Up 37.6 82.8 Up 04:06:27 - 04:36:27 7015

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 05VA123, (2026/12/21 04:18UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 14.94  64
Alhena         06:37:42.8 +16:23:57  1.9  8.08  52
PPM 096264     06:37:27.2 +24:35:27  6.5  0.72  50
PPM 096322     06:39:31.5 +24:36:03  6.9  0.28  50
PPM 096371     06:41:11.6 +24:39:22  9.1  0.25  51
PPM 096361     06:40:47.5 +24:41:32 10.4  0.25  50
05VA123        06:40:33.6 +24:26:57 15.1        50
Positions are for J2000

Event circumstances last updated at 2023/11/22 04:22:25 UT

Marc W. Buie, Southwest Research Institute

RECON