Event between (530930) 11WG157 and star GA1320:01885803 with event index number of 2444028
Geocentric closest approach at 2026/03/21 07:45:02 UTC
J2000 position of star is 04:26:41.7 +43:52:57
Equinox of date position of star is 04:28:16.6 +43:55:52
Stellar brightness G=16.4,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 44 degrees from the moon.
Moon is 7% illuminated.
TNO apparent brightness V=22.4
[RECON map]
TNO is 30.6 AU from the Sun
and 30.9 AU from the Earth.
The TNO is moving 17.6
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 172 seconds.
The 1-sigma cross-track error in the shadow position is
1666 km.
The sky-plane scale is
22385.4 km/arcsec.
The TNO has an absolute magnitude Hv=7.3
Diameter=211.8 km assuming a 5% albedo -- 12.1 sec chord
Diameter=86.5 km assuming a 30% albedo -- 4.9 sec chord
Dynamical classification is 1:1
Star training set for 530930, (2026/03/21 07:52UT) Object RA Dec mag sep mel Aldebaran 04:37:25.7 +16:33:36 0.8 27.44 40 Mirphak 03:26:12.5 +49:57:08 1.8 12.19 39 PPM 046963 04:19:57.5 +42:12:11 6.1 2.34 42 PPM 047093 04:29:45.8 +43:23:15 7.4 0.59 44 PPM 047060 04:27:27.6 +43:52:29 9.5 0.21 44 530930 04:28:33.4 +43:56:23 16.4 44 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 3.4 km
RECON observability=0.3 and success probability=1.5%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Dunrhomin | 07:46:28 | -48.5 | Dark | Down | 8.2 | 322.7 | Really Low | 07:31:36 - 08:01:20 | 2729 |
| CU-SBO | 07:46:30 | -48.8 | Dark | Down | 8.1 | 322.6 | Really Low | 07:31:38 - 08:01:22 | 2726 |
| Sleaford | 07:45:43 | -37.1 | Dark | Down | 17.9 | 320.4 | Really Low | 07:30:51 - 08:00:35 | 2623 |
| George/Scottsdale | 07:47:18 | -55.9 | Dark | Down | 6.4 | 319.8 | Really Low | 07:32:26 - 08:02:10 | 2473 |
| Patrick | 07:47:18 | -54.3 | Dark | Down | 8.8 | 318.7 | Really Low | 07:32:26 - 08:02:10 | 2434 |
| Kingman/Dolan Springs | 07:47:19 | -54.5 | Dark | Down | 8.7 | 318.6 | Really Low | 07:32:27 - 08:02:11 | 2424 |
| Laughlin/Bullhead City | 07:47:21 | -54.5 | Dark | Down | 8.9 | 318.4 | Really Low | 07:32:29 - 08:02:13 | 2404 |
| Henderson | 07:47:19 | -53.7 | Dark | Down | 9.8 | 318.1 | Really Low | 07:32:27 - 08:02:11 | 2404 |
| Lake Havasu City | 07:47:23 | -55.2 | Dark | Down | 8.3 | 318.6 | Really Low | 07:32:31 - 08:02:15 | 2402 |
| Mohave Valley | 07:47:22 | -54.8 | Dark | Down | 8.7 | 318.4 | Really Low | 07:32:30 - 08:02:14 | 2400 |
| Parker | 07:47:24 | -55.6 | Dark | Down | 8.0 | 318.6 | Really Low | 07:32:32 - 08:02:16 | 2397 |
| Indian Springs | 07:47:19 | -53.1 | Dark | Down | 10.6 | 317.7 | Really Low | 07:32:27 - 08:02:11 | 2387 |
| Yuma | 07:47:31 | -57.0 | Dark | Down | 7.1 | 318.6 | Really Low | 07:32:39 - 08:02:23 | 2357 |
| Beatty | 07:47:20 | -52.8 | Dark | Down | 11.4 | 317.1 | Really Low | 07:32:28 - 08:02:12 | 2353 |
| Tonopah | 07:47:17 | -51.6 | Dark | Down | 12.5 | 316.7 | Really Low | 07:32:25 - 08:02:09 | 2352 |
| PNWRO | 07:46:46 | -43.6 | Dark | Down | 19.1 | 314.2 | Really Low | 07:31:54 - 08:01:38 | 2337 |
| Calipatria | 07:47:33 | -56.6 | Dark | Down | 7.9 | 318.2 | Really Low | 07:32:41 - 08:02:25 | 2333 |
| Anarchist Mountain Observatory | 07:46:33 | -40.6 | Dark | Down | 21.5 | 313.1 | Low | 07:31:41 - 08:01:25 | 2312 |
| Tonasket | 07:46:34 | -40.9 | Dark | Down | 21.3 | 313.1 | Low | 07:31:42 - 08:01:26 | 2311 |
| Okanogan | 07:46:37 | -41.2 | Dark | Down | 21.1 | 313.2 | Low | 07:31:45 - 08:01:29 | 2308 |
| Hawthorne | 07:47:19 | -51.1 | Dark | Down | 13.6 | 316.0 | Really Low | 07:32:27 - 08:02:11 | 2305 |
| Oliver | 07:46:33 | -40.4 | Dark | Down | 21.7 | 312.9 | Low | 07:31:41 - 08:01:25 | 2304 |
| Kelowna | 07:46:28 | -39.7 | Dark | Down | 22.1 | 312.8 | Low | 07:31:36 - 08:01:20 | 2303 |
| Idyllwild | 07:47:34 | -56.0 | Dark | Down | 9.0 | 317.5 | Really Low | 07:32:42 - 08:02:26 | 2303 |
| Penticton | 07:46:31 | -40.0 | Dark | Down | 21.9 | 312.8 | Low | 07:31:39 - 08:01:23 | 2302 |
| Brewster | 07:46:38 | -41.4 | Dark | Down | 21.0 | 313.1 | Low | 07:31:46 - 08:01:30 | 2302 |
| Bishop | 07:47:24 | -52.2 | Dark | Down | 12.6 | 316.3 | Really Low | 07:32:32 - 08:02:16 | 2299 |
| Summerland | 07:46:31 | -39.9 | Dark | Down | 22.0 | 312.7 | Low | 07:31:39 - 08:01:23 | 2298 |
| Peachland | 07:46:30 | -39.8 | Dark | Down | 22.2 | 312.6 | Low | 07:31:38 - 08:01:22 | 2294 |
| Yerington | 07:47:19 | -50.5 | Dark | Down | 14.2 | 315.6 | Really Low | 07:32:27 - 08:02:11 | 2291 |
| Manson/Chelan | 07:46:40 | -41.6 | Dark | Down | 21.1 | 313.0 | Low | 07:31:48 - 08:01:32 | 2291 |
| Wenatchee | 07:46:43 | -42.1 | Dark | Down | 20.8 | 313.0 | Low | 07:31:51 - 08:01:35 | 2286 |
| Toppenish/White Swan | 07:46:48 | -43.1 | Dark | Down | 20.1 | 313.3 | Low | 07:31:56 - 08:01:40 | 2285 |
| Lee Vining | 07:47:23 | -51.6 | Dark | Down | 13.5 | 315.8 | Really Low | 07:32:31 - 08:02:15 | 2280 |
| Ellensburg | 07:46:46 | -42.5 | Dark | Down | 20.6 | 313.0 | Low | 07:31:54 - 08:01:38 | 2280 |
| Yakima | 07:46:47 | -42.9 | Dark | Down | 20.4 | 313.1 | Low | 07:31:55 - 08:01:39 | 2279 |
| Cedarville | 07:47:10 | -47.9 | Dark | Down | 16.6 | 314.6 | Really Low | 07:32:18 - 08:02:02 | 2277 |
| Lakeview | 07:47:07 | -47.3 | Dark | Down | 17.2 | 314.4 | Really Low | 07:32:15 - 08:01:59 | 2275 |
| Reno | 07:47:18 | -49.9 | Dark | Down | 15.0 | 315.2 | Really Low | 07:32:26 - 08:02:10 | 2272 |
| Goldendale | 07:46:52 | -43.6 | Dark | Down | 20.0 | 313.2 | Really Low | 07:32:00 - 08:01:44 | 2270 |
| Carson City | 07:47:20 | -50.3 | Dark | Down | 14.7 | 315.3 | Really Low | 07:32:28 - 08:02:12 | 2269 |
| Kamloops | 07:46:26 | -38.8 | Dark | Down | 23.1 | 312.0 | Low | 07:31:34 - 08:01:18 | 2269 |
| Gardnerville | 07:47:21 | -50.5 | Dark | Down | 14.5 | 315.3 | Really Low | 07:32:29 - 08:02:13 | 2268 |
| North Lake | 07:47:04 | -46.2 | Dark | Down | 18.2 | 313.8 | Really Low | 07:32:12 - 08:01:56 | 2261 |
| Maupin | 07:46:55 | -44.2 | Dark | Down | 19.6 | 313.2 | Really Low | 07:32:03 - 08:01:47 | 2260 |
| The Dalles | 07:46:54 | -43.8 | Dark | Down | 20.0 | 313.1 | Really Low | 07:32:02 - 08:01:46 | 2257 |
| Portola | 07:47:19 | -49.6 | Dark | Down | 15.5 | 314.8 | Really Low | 07:32:27 - 08:02:11 | 2250 |
| Bend | 07:47:01 | -45.3 | Dark | Down | 19.0 | 313.4 | Really Low | 07:32:09 - 08:01:53 | 2249 |
| Susanville | 07:47:17 | -49.0 | Dark | Down | 16.1 | 314.6 | Really Low | 07:32:25 - 08:02:09 | 2249 |
| Oregon Observatory | 07:47:02 | -45.5 | Dark | Down | 18.9 | 313.4 | Really Low | 07:32:10 - 08:01:54 | 2244 |
| Sisters | 07:47:01 | -45.0 | Dark | Down | 19.3 | 313.2 | Really Low | 07:32:09 - 08:01:53 | 2240 |
| Gimple | 07:47:19 | -49.2 | Dark | Down | 16.0 | 314.6 | Really Low | 07:32:27 - 08:02:11 | 2238 |
| Wildwood | 07:47:38 | -55.5 | Dark | Down | 10.4 | 316.7 | Really Low | 07:32:46 - 08:02:30 | 2236 |
| Greenville | 07:47:18 | -49.2 | Dark | Down | 16.0 | 314.5 | Really Low | 07:32:26 - 08:02:10 | 2235 |
| Quincy | 07:47:20 | -49.4 | Dark | Down | 15.9 | 314.6 | Really Low | 07:32:28 - 08:02:12 | 2232 |
| Fall River/Burney | 07:47:16 | -48.3 | Dark | Down | 16.9 | 314.1 | Really Low | 07:32:24 - 08:02:08 | 2226 |
| Klamath Falls | 07:47:11 | -47.1 | Dark | Down | 17.9 | 313.6 | Really Low | 07:32:19 - 08:02:03 | 2221 |
| Chiloquin | 07:47:09 | -46.7 | Dark | Down | 18.2 | 313.5 | Really Low | 07:32:17 - 08:02:01 | 2221 |
| Victoria | 07:46:45 | -40.6 | Dark | Down | 23.1 | 311.0 | Low | 07:31:53 - 08:01:37 | 2176 |
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 530930, (2026/03/21 07:52UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:29 0.8 27.44 40 Mirphak 03:24:19.4 +49:51:40 1.8 12.19 39 PPM 046963 04:18:08.2 +42:08:27 6.1 2.34 42 PPM 047093 04:27:54.7 +43:19:52 7.4 0.59 44 PPM 047060 04:25:36.1 +43:49:01 9.5 0.21 44 530930 04:26:41.7 +43:52:57 16.4 44 Positions are for J2000
Event circumstances last updated at 2022/04/14 23:08:03 UT
Marc W. Buie, Southwest Research Institute