Event between (531040) 12CS57 and star GA1000:03441019 with event index number of 2444632
Geocentric closest approach at 2025/11/07 12:55:32 UTC
J2000 position of star is 10:29:10.4 +10:34:10
Equinox of date position of star is 10:30:21.1 +10:27:17
Stellar brightness G=15.3,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 81 degrees from the moon.
Moon is 94% illuminated.
TNO apparent brightness V=22.9
[RECON map]
TNO is 42.8 AU from the Sun
and 43.1 AU from the Earth.
The TNO is moving 14.4
km/sec on the sky relative to the star, or,
1.7 arcsec/hr.
The 1-sigma error in the time of the event is 564 seconds.
The 1-sigma cross-track error in the shadow position is
1916 km.
The sky-plane scale is
31272.0 km/arcsec.
The TNO has an absolute magnitude Hv=6.4
Diameter=331.1 km assuming a 5% albedo -- 22.0 sec chord
Diameter=135.2 km assuming a 30% albedo -- 9.0 sec chord
Dynamical classification is SCATEXTD
Star training set for 531040, (2025/11/07 12:46UT) Object RA Dec mag sep mel Regulus 10:09:44.8 +11:50:23 1.3 5.29 76 45 Leo 10:29:00.8 +09:37:47 5.8 0.89 81 PPM 127448 10:30:33.2 +10:01:21 7.6 0.41 82 PPM 127451 10:30:42.1 +10:23:37 9.5 0.06 82 531040 10:30:32.4 +10:26:11 15.3 82 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
1.6 sigma about the mid-time.
The median site spacing is 29.9 km
RECON observability=0.9 and success probability=24.0%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Sleaford | 12:52:35 | -12.1 | AT | Up | 44.5 | 147.3 | Up | 12:37:35 - 13:07:35 | 258 |
| Kamloops | 12:51:32 | -21.1 | Dark | Up | 39.4 | 128.8 | Up | 12:36:32 - 13:06:32 | 5 |
| Kelowna | 12:51:34 | -20.5 | Dark | Up | 40.3 | 129.3 | Up | 12:36:34 - 13:06:34 | -64 |
| Peachland | 12:51:33 | -20.7 | Dark | Up | 40.2 | 128.9 | Up | 12:36:33 - 13:06:33 | -76 |
| Summerland | 12:51:33 | -20.6 | Dark | Up | 40.4 | 128.9 | Up | 12:36:33 - 13:06:33 | -90 |
| Penticton | 12:51:33 | -20.6 | Dark | Up | 40.5 | 129.0 | Up | 12:36:33 - 13:06:33 | -95 |
| Oliver | 12:51:32 | -20.5 | Dark | Up | 40.7 | 128.7 | Up | 12:36:32 - 13:06:32 | -128 |
| Anarchist Mountain Observatory | 12:51:33 | -20.4 | Dark | Up | 40.9 | 128.8 | Up | 12:36:33 - 13:06:33 | -143 |
| Tonasket | 12:51:32 | -20.4 | Dark | Up | 41.1 | 128.5 | Up | 12:36:32 - 13:06:32 | -172 |
| Okanogan | 12:51:31 | -20.5 | Dark | Up | 41.2 | 128.1 | Up | 12:36:31 - 13:06:31 | -205 |
| Victoria | 12:51:16 | -23.1 | Dark | Up | 39.0 | 124.0 | Up | 12:36:16 - 13:06:16 | -214 |
| Brewster | 12:51:29 | -20.7 | Dark | Up | 41.2 | 127.7 | Up | 12:36:29 - 13:06:29 | -232 |
| Manson/Chelan | 12:51:27 | -20.9 | Dark | Up | 41.2 | 127.2 | Up | 12:36:27 - 13:06:27 | -254 |
| Wenatchee | 12:51:26 | -21.0 | Dark | Up | 41.4 | 126.6 | Up | 12:36:26 - 13:06:26 | -301 |
| Ellensburg | 12:51:24 | -21.2 | Dark | Up | 41.5 | 126.1 | Up | 12:36:24 - 13:06:24 | -342 |
| Yakima | 12:51:23 | -21.2 | Dark | Up | 41.7 | 125.8 | Up | 12:36:23 - 13:06:23 | -381 |
| Toppenish/White Swan | 12:51:24 | -21.0 | Dark | Up | 41.9 | 125.8 | Up | 12:36:24 - 13:06:24 | -401 |
| PNWRO | 12:51:29 | -20.0 | Dark | Up | 43.0 | 127.2 | Up | 12:36:29 - 13:06:29 | -426 |
| Goldendale | 12:51:20 | -21.3 | Dark | Up | 42.0 | 124.9 | Up | 12:36:20 - 13:06:20 | -457 |
| The Dalles | 12:51:19 | -21.6 | Dark | Up | 41.9 | 124.4 | Up | 12:36:19 - 13:06:19 | -482 |
| Maupin | 12:51:19 | -21.5 | Dark | Up | 42.2 | 124.2 | Up | 12:36:19 - 13:06:19 | -522 |
| Sisters | 12:51:14 | -21.8 | Dark | Up | 42.4 | 122.9 | Up | 12:36:14 - 13:06:14 | -611 |
| Bend | 12:51:15 | -21.6 | Dark | Up | 42.7 | 123.0 | Up | 12:36:15 - 13:06:15 | -633 |
| Oregon Observatory | 12:51:14 | -21.7 | Dark | Up | 42.7 | 122.8 | Up | 12:36:14 - 13:06:14 | -651 |
| North Lake | 12:51:16 | -21.3 | Dark | Up | 43.4 | 122.8 | Up | 12:36:16 - 13:06:16 | -710 |
| Chiloquin | 12:51:10 | -22.0 | Dark | Up | 43.1 | 121.3 | Up | 12:36:10 - 13:06:10 | -784 |
| Lakeview | 12:51:17 | -20.8 | Dark | Up | 44.3 | 122.6 | Up | 12:36:17 - 13:06:17 | -812 |
| Klamath Falls | 12:51:10 | -21.9 | Dark | Up | 43.4 | 121.1 | Up | 12:36:10 - 13:06:10 | -818 |
| Dunrhomin | 12:52:32 | -9.0 | NT | Up | 54.3 | 140.1 | Up | 12:37:32 - 13:07:32 | -844 |
| CU-SBO | 12:52:31 | -9.0 | NT | Up | 54.5 | 139.8 | Up | 12:37:31 - 13:07:31 | -870 |
| Cedarville | 12:51:17 | -20.6 | Dark | Up | 44.8 | 122.2 | Up | 12:36:17 - 13:06:17 | -877 |
| Fall River/Burney | 12:51:10 | -21.6 | Dark | Up | 44.2 | 120.5 | Up | 12:36:10 - 13:06:10 | -934 |
| Susanville | 12:51:12 | -20.9 | Dark | Up | 45.0 | 120.7 | Up | 12:36:12 - 13:06:12 | -993 |
| Gimple | 12:51:11 | -21.1 | Dark | Up | 45.0 | 120.3 | Up | 12:36:11 - 13:06:11 | -1023 |
| Greenville | 12:51:11 | -21.2 | Dark | Up | 45.0 | 120.2 | Up | 12:36:11 - 13:06:11 | -1023 |
| Quincy | 12:51:10 | -21.1 | Dark | Up | 45.1 | 120.0 | Up | 12:36:10 - 13:06:10 | -1044 |
| Portola | 12:51:12 | -20.8 | Dark | Up | 45.4 | 120.4 | Up | 12:36:12 - 13:06:12 | -1053 |
| Reno | 12:51:15 | -20.2 | Dark | Up | 46.0 | 120.9 | Up | 12:36:15 - 13:06:15 | -1075 |
| Carson City | 12:51:15 | -20.2 | Dark | Up | 46.2 | 120.6 | Up | 12:36:15 - 13:06:15 | -1112 |
| Yerington | 12:51:18 | -19.7 | Dark | Up | 46.8 | 121.1 | Up | 12:36:18 - 13:06:18 | -1127 |
| Gardnerville | 12:51:15 | -20.1 | Dark | Up | 46.4 | 120.4 | Up | 12:36:15 - 13:06:15 | -1137 |
| Hawthorne | 12:51:20 | -19.2 | Dark | Up | 47.4 | 121.2 | Up | 12:36:20 - 13:06:20 | -1170 |
| Tonopah | 12:51:27 | -18.0 | Dark | Up | 48.6 | 122.3 | Up | 12:36:27 - 13:06:27 | -1206 |
| Lee Vining | 12:51:17 | -19.5 | Dark | Up | 47.3 | 120.2 | Up | 12:36:17 - 13:06:17 | -1232 |
| Bishop | 12:51:20 | -18.9 | Dark | Up | 48.1 | 120.4 | Up | 12:36:20 - 13:06:20 | -1288 |
| Beatty | 12:51:28 | -17.5 | AT | Up | 49.5 | 121.7 | Up | 12:36:28 - 13:06:28 | -1321 |
| Indian Springs | 12:51:33 | -16.6 | AT | Up | 50.4 | 122.6 | Up | 12:36:33 - 13:06:33 | -1345 |
| Henderson | 12:51:36 | -15.9 | AT | Up | 51.2 | 122.8 | Up | 12:36:36 - 13:06:36 | -1393 |
| Patrick | 12:51:42 | -14.9 | AT | Up | 52.3 | 123.5 | Up | 12:36:42 - 13:06:42 | -1446 |
| Kingman/Dolan Springs | 12:51:41 | -15.0 | AT | Up | 52.3 | 123.0 | Up | 12:36:41 - 13:06:41 | -1472 |
| Laughlin/Bullhead City | 12:51:38 | -15.5 | AT | Up | 51.9 | 122.4 | Up | 12:36:38 - 13:06:38 | -1480 |
| Mohave Valley | 12:51:38 | -15.4 | AT | Up | 52.1 | 122.1 | Up | 12:36:38 - 13:06:38 | -1508 |
| Lake Havasu City | 12:51:39 | -15.1 | AT | Up | 52.5 | 122.0 | Up | 12:36:39 - 13:06:39 | -1547 |
| Parker | 12:51:39 | -15.1 | AT | Up | 52.7 | 121.6 | Up | 12:36:39 - 13:06:39 | -1584 |
| George/Scottsdale | 12:51:53 | -12.9 | AT | Up | 54.7 | 124.0 | Up | 12:36:53 - 13:06:53 | -1600 |
| Wildwood | 12:51:16 | -18.7 | Dark | Up | 49.5 | 116.9 | Up | 12:36:16 - 13:06:16 | -1632 |
| Idyllwild | 12:51:26 | -17.0 | AT | Up | 51.1 | 118.5 | Up | 12:36:26 - 13:06:26 | -1652 |
| Calipatria | 12:51:32 | -15.9 | AT | Up | 52.3 | 119.1 | Up | 12:36:32 - 13:06:32 | -1704 |
| Yuma | 12:51:37 | -15.1 | AT | Up | 53.2 | 119.6 | Up | 12:36:37 - 13:06:37 | -1741 |
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 531040, (2025/11/07 12:46UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 5.29 76 45 Leo 10:27:39.0 +09:45:44 5.8 0.89 81 PPM 127448 10:29:11.4 +10:09:19 7.6 0.41 82 PPM 127451 10:29:20.2 +10:31:35 9.5 0.06 82 531040 10:29:10.4 +10:34:10 15.3 81 Positions are for J2000
Event circumstances last updated at 2022/04/10 23:15:10 UT
Marc W. Buie, Southwest Research Institute