Event between (531683) 12UC178 and star GA1080:00686987 with event index number of 2445122
Geocentric closest approach at 2025/10/31 04:32:19 UTC
J2000 position of star is 04:48:15.6 +19:59:11
Equinox of date position of star is 04:49:41.1 +20:01:38
Stellar brightness G=16.1,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 107 degrees from the moon.
Moon is 66% illuminated.
Apparent brightness V=22.9
[RECON map]
Object is 40.4 AU from the Sun
and 39.6 AU from the Earth.
Apparent velocity is 20.0
km/sec on the sky relative to the star, or,
2.5 arcsec/hr.
The 1-sigma error in the time of the event is 210 seconds.
The 1-sigma cross-track error in the shadow position is
1657 km.
The sky-plane scale is
28690.4 km/arcsec.
The object has an absolute magnitude Hv=6.8
Diameter=263.0 km assuming a 5% albedo -- 13.1 sec chord
Diameter=107.4 km assuming a 30% albedo -- 5.3 sec chord
Dynamical classification is 5:3EE
Star training set for 531683, (2025/10/31 04:32UT) Object RA Dec mag sep mel Aldebaran 04:37:24.3 +16:33:33 0.8 4.55 104 Alnath 05:27:55.6 +28:37:37 1.6 12.21 117 97 Tau 04:52:53.3 +18:52:54 5.1 1.36 108 PPM 120283 04:50:13.0 +18:45:02 7.8 1.28 107 PPM 120287 04:50:17.1 +19:46:03 9.9 0.29 107 531683 04:49:47.0 +20:01:48 16.1 107 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
4.3 sigma about the mid-time.
The median site spacing is 58.4 km
RECON observability=0.2 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 | 04:35:05 | -37.2 | Dark | Up | 19.1 | 81.5 | Really Low | 04:20:05 - 04:50:05 | 5521 |
| Victoria | 04:35:15 | -36.3 | Dark | Up | 16.8 | 78.6 | Really Low | 04:20:15 - 04:50:15 | 5476 |
| Peachland | 04:35:09 | -38.0 | Dark | Up | 19.4 | 81.6 | Really Low | 04:20:09 - 04:50:09 | 5454 |
| Kelowna | 04:35:09 | -38.1 | Dark | Up | 19.6 | 81.9 | Really Low | 04:20:09 - 04:50:09 | 5452 |
| Summerland | 04:35:10 | -38.1 | Dark | Up | 19.4 | 81.7 | Really Low | 04:20:10 - 04:50:10 | 5443 |
| Penticton | 04:35:10 | -38.2 | Dark | Up | 19.5 | 81.7 | Really Low | 04:20:10 - 04:50:10 | 5436 |
| Oliver | 04:35:13 | -38.3 | Dark | Up | 19.4 | 81.6 | Really Low | 04:20:13 - 04:50:13 | 5416 |
| Anarchist Mountain Observatory | 04:35:12 | -38.5 | Dark | Up | 19.5 | 81.7 | Really Low | 04:20:12 - 04:50:12 | 5401 |
| Okanogan | 04:35:15 | -38.7 | Dark | Up | 19.3 | 81.3 | Really Low | 04:20:15 - 04:50:15 | 5368 |
| Brewster | 04:35:17 | -38.7 | Dark | Up | 19.1 | 81.1 | Really Low | 04:20:17 - 04:50:17 | 5358 |
| Manson/Chelan | 04:35:18 | -38.5 | Dark | Up | 18.9 | 80.7 | Really Low | 04:20:18 - 04:50:18 | 5355 |
| Wenatchee | 04:35:20 | -38.6 | Dark | Up | 18.7 | 80.5 | Really Low | 04:20:20 - 04:50:20 | 5331 |
| Ellensburg | 04:35:22 | -38.7 | Dark | Up | 18.5 | 80.2 | Really Low | 04:20:22 - 04:50:22 | 5312 |
| Yakima | 04:35:24 | -38.8 | Dark | Up | 18.4 | 80.0 | Really Low | 04:20:24 - 04:50:24 | 5288 |
| Toppenish/White Swan | 04:35:24 | -39.0 | Dark | Up | 18.5 | 80.1 | Really Low | 04:20:24 - 04:50:24 | 5270 |
| The Dalles | 04:35:28 | -38.8 | Dark | Up | 17.8 | 79.3 | Really Low | 04:20:28 - 04:50:28 | 5243 |
| Sleaford | 04:34:50 | -43.8 | Dark | Up | 28.1 | 93.2 | Low | 04:19:50 - 04:49:50 | 5238 |
| Maupin | 04:35:30 | -39.1 | Dark | Up | 17.8 | 79.3 | Really Low | 04:20:30 - 04:50:30 | 5214 |
| PNWRO | 04:35:26 | -40.1 | Dark | Up | 19.4 | 81.0 | Really Low | 04:20:26 - 04:50:26 | 5206 |
| Sisters | 04:35:35 | -39.1 | Dark | Up | 17.3 | 78.7 | Really Low | 04:20:35 - 04:50:35 | 5172 |
| Bend | 04:35:35 | -39.3 | Dark | Up | 17.4 | 78.8 | Really Low | 04:20:35 - 04:50:35 | 5149 |
| Oregon Observatory | 04:35:36 | -39.3 | Dark | Up | 17.3 | 78.6 | Really Low | 04:20:36 - 04:50:36 | 5142 |
| Chiloquin | 04:35:41 | -39.5 | Dark | Up | 16.8 | 78.0 | Really Low | 04:20:41 - 04:50:41 | 5067 |
| Klamath Falls | 04:35:44 | -39.6 | Dark | Up | 16.8 | 77.9 | Really Low | 04:20:44 - 04:50:44 | 5042 |
| Fall River/Burney | 04:35:48 | -40.3 | Dark | Up | 16.8 | 77.8 | Really Low | 04:20:48 - 04:50:48 | 4951 |
| Cedarville | 04:35:46 | -41.0 | Dark | Up | 17.8 | 78.7 | Really Low | 04:20:46 - 04:50:46 | 4948 |
| Greenville | 04:35:52 | -40.9 | Dark | Up | 17.0 | 77.9 | Really Low | 04:20:52 - 04:50:52 | 4874 |
| Gimple | 04:35:52 | -41.0 | Dark | Up | 17.0 | 77.9 | Really Low | 04:20:52 - 04:50:52 | 4872 |
| Quincy | 04:35:53 | -41.0 | Dark | Up | 16.9 | 77.8 | Really Low | 04:20:53 - 04:50:53 | 4860 |
| Portola | 04:35:54 | -41.4 | Dark | Up | 17.2 | 78.0 | Really Low | 04:20:54 - 04:50:54 | 4837 |
| Reno | 04:35:54 | -41.9 | Dark | Up | 17.7 | 78.3 | Really Low | 04:20:54 - 04:50:54 | 4798 |
| Carson City | 04:35:55 | -42.1 | Dark | Up | 17.6 | 78.3 | Really Low | 04:20:55 - 04:50:55 | 4772 |
| Gardnerville | 04:35:57 | -42.2 | Dark | Up | 17.6 | 78.2 | Really Low | 04:20:57 - 04:50:57 | 4753 |
| Yerington | 04:35:56 | -42.6 | Dark | Up | 18.1 | 78.6 | Really Low | 04:20:56 - 04:50:56 | 4738 |
| Hawthorne | 04:35:58 | -43.1 | Dark | Up | 18.4 | 78.7 | Really Low | 04:20:58 - 04:50:58 | 4688 |
| Lee Vining | 04:36:01 | -43.0 | Dark | Up | 17.9 | 78.3 | Really Low | 04:21:01 - 04:51:01 | 4662 |
| Bishop | 04:36:03 | -43.7 | Dark | Up | 18.4 | 78.5 | Really Low | 04:21:03 - 04:51:03 | 4594 |
| Beatty | 04:36:04 | -45.1 | Dark | Up | 19.6 | 79.2 | Really Low | 04:21:04 - 04:51:04 | 4507 |
| Dunrhomin | 04:35:41 | -51.7 | Dark | Up | 28.9 | 87.4 | Low | 04:20:41 - 04:50:41 | 4395 |
| Nikitin | 04:35:40 | -51.8 | Dark | Up | 28.9 | 87.3 | Low | 04:20:40 - 04:50:40 | 4381 |
| CU-SBO | 04:35:42 | -51.8 | Dark | Up | 28.8 | 87.3 | Low | 04:20:42 - 04:50:42 | 4379 |
| Wildwood | 04:36:16 | -44.5 | Dark | Up | 17.6 | 77.4 | Really Low | 04:21:16 - 04:51:16 | 4349 |
| Laughlin/Bullhead City | 04:36:09 | -47.3 | Dark | Up | 21.0 | 79.8 | Low | 04:21:09 - 04:51:09 | 4301 |
| Patrick | 04:36:08 | -47.8 | Dark | Up | 21.6 | 80.2 | Low | 04:21:08 - 04:51:08 | 4297 |
| Idyllwild | 04:36:16 | -46.1 | Dark | Up | 19.0 | 78.2 | Really Low | 04:21:16 - 04:51:16 | 4258 |
| Lake Havasu City | 04:36:12 | -47.7 | Dark | Up | 21.1 | 79.7 | Low | 04:21:12 - 04:51:12 | 4239 |
| Calipatria | 04:36:18 | -47.2 | Dark | Up | 19.9 | 78.6 | Really Low | 04:21:18 - 04:51:18 | 4169 |
| Yuma | 04:36:19 | -48.1 | Dark | Up | 20.5 | 78.9 | Low | 04:21:19 - 04:51:19 | 4103 |
| George/Scottsdale | 04:36:12 | -49.9 | Dark | Up | 23.0 | 80.6 | Low | 04:21:12 - 04:51:12 | 4093 |
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 531683, (2025/10/31 04:32UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:29 0.8 4.55 104 Alnath 05:26:17.6 +28:36:23 1.6 12.21 117 97 Tau 04:51:22.6 +18:50:23 5.1 1.36 108 PPM 120283 04:48:42.5 +18:42:25 7.8 1.28 107 PPM 120287 04:48:45.9 +19:43:26 9.9 0.29 107 531683 04:48:15.6 +19:59:11 16.1 107 Positions are for J2000
Event circumstances last updated at 2024/03/03 06:05:09 UT
Marc W. Buie, Southwest Research Institute