Event between (500838) 13GV137 and star GA0720:05432000 with event index number of 2329052
Geocentric closest approach at 2026/05/17 10:02:49 UTC
J2000 position of star is 15:12:28.8 -16:45:47
Equinox of date position of star is 15:13:44.2 -16:50:45
Stellar brightness G=15.6,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 164 degrees from the moon.
Moon is 1% illuminated.
TNO apparent brightness V=23.4
[RECON map]
TNO is 45.9 AU from the Sun
and 44.9 AU from the Earth.
The TNO is moving 25.1
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 258 seconds.
The 1-sigma cross-track error in the shadow position is
3043 km.
The sky-plane scale is
32582.9 km/arcsec.
The TNO has an absolute magnitude Hv=6.8
Diameter=263.0 km assuming a 5% albedo -- 10.2 sec chord
Diameter=107.4 km assuming a 30% albedo -- 4.2 sec chord
Dynamical classification is CLASSICAL
Star training set for 500838, (2026/05/17 10:25UT) Object RA Dec mag sep mel Antares 16:31:01.7 -26:29:17 0.9 20.29 175 27Bet Lib 15:18:25.8 -09:28:43 2.6 7.46 159 21Nu Lib 15:08:06.2 -16:21:27 5.2 1.49 163 PPM 229883 15:13:20.5 -16:42:33 8.1 0.21 164 PPM 229891 15:13:41.9 -16:44:50 9.4 0.13 164 500838 15:13:57.8 -16:51:38 15.6 164 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
3.5 sigma about the mid-time.
The median site spacing is 17.9 km
RECON observability=0.6 and success probability=1.8%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Sleaford | 10:01:46 | -8.3 | NT | Down | 8.0 | 229.2 | Really Low | 09:46:46 - 10:16:46 | 7164 |
| Kamloops | 10:02:12 | -14.8 | AT | Down | 15.1 | 216.8 | Really Low | 09:47:12 - 10:17:12 | 7132 |
| Kelowna | 10:02:08 | -15.2 | AT | Down | 15.4 | 217.8 | Really Low | 09:47:08 - 10:17:08 | 7107 |
| Peachland | 10:02:08 | -15.4 | AT | Down | 15.6 | 217.5 | Really Low | 09:47:08 - 10:17:08 | 7102 |
| Summerland | 10:02:07 | -15.5 | AT | Down | 15.7 | 217.6 | Really Low | 09:47:07 - 10:17:07 | 7097 |
| Penticton | 10:02:07 | -15.5 | AT | Down | 15.7 | 217.7 | Really Low | 09:47:07 - 10:17:07 | 7095 |
| Oliver | 10:02:06 | -15.8 | AT | Down | 16.0 | 217.8 | Really Low | 09:47:06 - 10:17:06 | 7083 |
| Anarchist Mountain Observatory | 10:02:05 | -15.9 | AT | Down | 16.0 | 218.0 | Really Low | 09:47:05 - 10:17:05 | 7077 |
| Tonasket | 10:02:05 | -16.2 | AT | Down | 16.3 | 218.0 | Really Low | 09:47:05 - 10:17:05 | 7065 |
| Okanogan | 10:02:05 | -16.5 | AT | Down | 16.6 | 217.9 | Really Low | 09:47:05 - 10:17:05 | 7053 |
| Victoria | 10:02:14 | -17.6 | AT | Down | 18.0 | 214.4 | Really Low | 09:47:14 - 10:17:14 | 7047 |
| Brewster | 10:02:04 | -16.8 | AT | Down | 16.9 | 217.8 | Really Low | 09:47:04 - 10:17:04 | 7042 |
| Manson/Chelan | 10:02:04 | -17.1 | AT | Down | 17.2 | 217.5 | Really Low | 09:47:04 - 10:17:04 | 7033 |
| Wenatchee | 10:02:04 | -17.6 | AT | Down | 17.7 | 217.4 | Really Low | 09:47:04 - 10:17:04 | 7015 |
| Ellensburg | 10:02:02 | -18.0 | Dark | Down | 18.1 | 217.3 | Really Low | 09:47:02 - 10:17:02 | 6998 |
| Yakima | 10:02:02 | -18.4 | Dark | Down | 18.4 | 217.3 | Really Low | 09:47:02 - 10:17:02 | 6982 |
| Toppenish/White Swan | 10:02:01 | -18.5 | Dark | Down | 18.5 | 217.5 | Really Low | 09:47:01 - 10:17:01 | 6973 |
| PNWRO | 10:01:56 | -18.3 | Dark | Down | 18.2 | 219.0 | Really Low | 09:46:56 - 10:16:56 | 6962 |
| Goldendale | 10:02:01 | -19.1 | Dark | Down | 19.2 | 217.3 | Really Low | 09:47:01 - 10:17:01 | 6949 |
| The Dalles | 10:02:02 | -19.5 | Dark | Down | 19.5 | 217.0 | Really Low | 09:47:02 - 10:17:02 | 6939 |
| Maupin | 10:02:01 | -19.8 | Dark | Down | 19.8 | 217.2 | Really Low | 09:47:01 - 10:17:01 | 6921 |
| Sisters | 10:02:00 | -20.7 | Dark | Down | 20.7 | 216.9 | Low | 09:47:00 - 10:17:00 | 6882 |
| Bend | 10:01:58 | -20.8 | Dark | Down | 20.8 | 217.2 | Low | 09:46:58 - 10:16:58 | 6872 |
| Oregon Observatory | 10:01:58 | -21.0 | Dark | Down | 21.0 | 217.1 | Low | 09:46:58 - 10:16:58 | 6864 |
| North Lake | 10:01:55 | -21.4 | Dark | Down | 21.3 | 217.7 | Low | 09:46:55 - 10:16:55 | 6836 |
| Chiloquin | 10:01:55 | -22.3 | Dark | Down | 22.2 | 217.0 | Low | 09:46:55 - 10:16:55 | 6801 |
| Lakeview | 10:01:51 | -22.1 | Dark | Down | 21.8 | 218.5 | Low | 09:46:51 - 10:16:51 | 6788 |
| Klamath Falls | 10:01:55 | -22.6 | Dark | Down | 22.5 | 217.2 | Low | 09:46:55 - 10:16:55 | 6785 |
| Cedarville | 10:01:49 | -22.6 | Dark | Down | 22.3 | 218.8 | Low | 09:46:49 - 10:16:49 | 6757 |
| Fall River/Burney | 10:01:51 | -23.5 | Dark | Down | 23.2 | 217.8 | Low | 09:46:51 - 10:16:51 | 6728 |
| Susanville | 10:01:47 | -23.7 | Dark | Down | 23.4 | 218.7 | Low | 09:46:47 - 10:16:47 | 6699 |
| Gimple | 10:01:48 | -24.1 | Dark | Down | 23.7 | 218.5 | Low | 09:46:48 - 10:16:48 | 6684 |
| Greenville | 10:01:48 | -24.1 | Dark | Down | 23.7 | 218.5 | Low | 09:46:48 - 10:16:48 | 6684 |
| Dunrhomin | 10:01:10 | -16.6 | AT | Down | 15.2 | 231.6 | Really Low | 09:46:10 - 10:16:10 | 6673 |
| Quincy | 10:01:47 | -24.3 | Dark | Down | 23.9 | 218.5 | Low | 09:46:47 - 10:16:47 | 6673 |
| Portola | 10:01:46 | -24.2 | Dark | Down | 23.8 | 219.0 | Low | 09:46:46 - 10:16:46 | 6669 |
| CU-SBO | 10:01:08 | -16.8 | AT | Down | 15.4 | 231.5 | Really Low | 09:46:08 - 10:16:08 | 6661 |
| Reno | 10:01:43 | -24.1 | Dark | Down | 23.7 | 219.6 | Low | 09:46:43 - 10:16:43 | 6656 |
| Carson City | 10:01:42 | -24.4 | Dark | Down | 23.9 | 219.8 | Low | 09:46:42 - 10:16:42 | 6637 |
| Yerington | 10:01:41 | -24.3 | Dark | Down | 23.8 | 220.4 | Low | 09:46:41 - 10:16:41 | 6629 |
| Gardnerville | 10:01:42 | -24.6 | Dark | Down | 24.1 | 219.9 | Low | 09:46:42 - 10:16:42 | 6625 |
| Hawthorne | 10:01:38 | -24.5 | Dark | Down | 23.8 | 221.0 | Low | 09:46:38 - 10:16:38 | 6605 |
| Tonopah | 10:01:33 | -24.2 | Dark | Down | 23.5 | 222.3 | Low | 09:46:33 - 10:16:33 | 6582 |
| Lee Vining | 10:01:38 | -25.2 | Dark | Down | 24.5 | 220.7 | Low | 09:46:38 - 10:16:38 | 6573 |
| Bishop | 10:01:35 | -25.4 | Dark | Down | 24.6 | 221.5 | Low | 09:46:35 - 10:16:35 | 6541 |
| Beatty | 10:01:29 | -25.0 | Dark | Down | 24.1 | 223.1 | Low | 09:46:29 - 10:16:29 | 6517 |
| Indian Springs | 10:01:26 | -24.7 | Dark | Down | 23.7 | 224.1 | Low | 09:46:26 - 10:16:26 | 6499 |
| Henderson | 10:01:22 | -24.8 | Dark | Down | 23.7 | 224.8 | Low | 09:46:22 - 10:16:22 | 6468 |
| Patrick | 10:01:18 | -24.8 | Dark | Down | 23.5 | 225.9 | Low | 09:46:18 - 10:16:18 | 6431 |
| Kingman/Dolan Springs | 10:01:18 | -25.0 | Dark | Down | 23.8 | 225.8 | Low | 09:46:18 - 10:16:18 | 6418 |
| Laughlin/Bullhead City | 10:01:19 | -25.3 | Dark | Down | 24.1 | 225.4 | Low | 09:46:19 - 10:16:19 | 6416 |
| Mohave Valley | 10:01:19 | -25.5 | Dark | Down | 24.3 | 225.5 | Low | 09:46:19 - 10:16:19 | 6399 |
| Lake Havasu City | 10:01:17 | -25.7 | Dark | Down | 24.4 | 225.8 | Low | 09:46:17 - 10:16:17 | 6375 |
| Parker | 10:01:16 | -26.0 | Dark | Down | 24.7 | 226.0 | Low | 09:46:16 - 10:16:16 | 6353 |
| Wildwood | 10:01:28 | -28.1 | Dark | Down | 27.2 | 222.4 | Low | 09:46:28 - 10:16:28 | 6347 |
| Idyllwild | 10:01:22 | -27.5 | Dark | Down | 26.4 | 224.1 | Low | 09:46:22 - 10:16:22 | 6329 |
| George/Scottsdale | 10:01:08 | -25.0 | Dark | Down | 23.5 | 228.1 | Low | 09:46:08 - 10:16:08 | 6325 |
| Calipatria | 10:01:17 | -27.4 | Dark | Down | 26.1 | 225.3 | Low | 09:46:17 - 10:16:17 | 6290 |
| Yuma | 10:01:13 | -27.3 | Dark | Down | 25.9 | 226.2 | Low | 09:46:13 - 10:16:13 | 6263 |
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 500838, (2026/05/17 10:25UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 20.29 175 27Bet Lib 15:17:00.3 -09:22:59 2.6 7.46 159 21Nu Lib 15:06:37.6 -16:15:25 5.2 1.49 163 PPM 229883 15:11:51.6 -16:36:41 8.1 0.21 164 PPM 229891 15:12:12.9 -16:38:58 9.4 0.13 164 500838 15:12:28.8 -16:45:47 15.6 164 Positions are for J2000
Event circumstances last updated at 2022/05/04 23:34:55 UT
Marc W. Buie, Southwest Research Institute