Event between (143685) 03SS317 and star GA1020:00323229 with event index number of 2468378
Geocentric closest approach at 2025/11/28 11:26:29 UTC
J2000 position of star is 03:29:13.0 +13:42:02
Equinox of date position of star is 03:30:29.1 +13:46:41
Stellar brightness G=14.3,
use SENSEUP=64 with the MallinCam and and exposure
time of 1 seconds with the QHY174 camera.
Star is 75 degrees from the moon.
Moon is 52% illuminated.
TNO apparent brightness V=22.8
[RECON map]
TNO is 29.1 AU from the Sun
and 28.1 AU from the Earth.
The TNO is moving 23.4
km/sec on the sky relative to the star, or,
4.1 arcsec/hr.
The 1-sigma error in the time of the event is 95 seconds.
The 1-sigma cross-track error in the shadow position is
1291 km.
The sky-plane scale is
20399.5 km/arcsec.
The TNO has an absolute magnitude Hv=8.2
Diameter=166.0 km assuming a 5% albedo -- 6.0 sec chord
Diameter=67.8 km assuming a 30% albedo -- 2.4 sec chord
Dynamical classification is 4:3E
Star training set for 143685, (2025/11/28 11:27UT) Object RA Dec mag sep mel Aldebaran 04:37:24.6 +16:33:34 0.8 16.34 91 Menkar 03:03:38.2 +04:11:24 2.5 11.68 66 5 Tau 03:32:18.4 +13:01:25 4.1 0.86 75 PPM 119071 03:26:50.6 +14:10:38 8.5 1.00 74 PPM 119108 03:30:00.8 +14:12:14 9.1 0.44 75 PPM 119123 03:31:15.3 +13:30:09 10.5 0.32 75 143685 03:30:39.4 +13:47:18 14.3 75 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 33.8 km
RECON observability=0.9 and success probability=0.1%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Sleaford | 11:23:00 | -30.2 | Dark | Down | 16.8 | 270.9 | Really Low | 11:14:34 - 11:31:26 | 7981 |
| Kamloops | 11:23:11 | -39.3 | Dark | Down | 25.9 | 259.8 | Low | 11:14:45 - 11:31:37 | 7701 |
| Kelowna | 11:23:08 | -39.0 | Dark | Down | 25.4 | 261.0 | Low | 11:14:42 - 11:31:34 | 7632 |
| Peachland | 11:23:08 | -39.2 | Dark | Down | 25.6 | 260.8 | Low | 11:14:42 - 11:31:34 | 7619 |
| Summerland | 11:23:07 | -39.2 | Dark | Down | 25.6 | 260.9 | Low | 11:14:41 - 11:31:33 | 7606 |
| Penticton | 11:23:07 | -39.1 | Dark | Down | 25.5 | 261.0 | Low | 11:14:41 - 11:31:33 | 7601 |
| Oliver | 11:23:07 | -39.2 | Dark | Down | 25.6 | 261.2 | Low | 11:14:41 - 11:31:33 | 7568 |
| Anarchist Mountain Observatory | 11:23:06 | -39.1 | Dark | Down | 25.5 | 261.4 | Low | 11:14:40 - 11:31:32 | 7553 |
| Okanogan | 11:23:05 | -39.4 | Dark | Down | 25.8 | 261.6 | Low | 11:14:39 - 11:31:31 | 7490 |
| Victoria | 11:23:11 | -41.8 | Dark | Down | 28.2 | 258.4 | Low | 11:14:45 - 11:31:37 | 7474 |
| Brewster | 11:23:04 | -39.6 | Dark | Down | 25.9 | 261.5 | Low | 11:14:38 - 11:31:30 | 7462 |
| Manson/Chelan | 11:23:04 | -39.9 | Dark | Down | 26.2 | 261.3 | Low | 11:14:38 - 11:31:30 | 7439 |
| Wenatchee | 11:23:03 | -40.1 | Dark | Down | 26.4 | 261.4 | Low | 11:14:37 - 11:31:29 | 7392 |
| Ellensburg | 11:23:03 | -40.3 | Dark | Down | 26.6 | 261.5 | Low | 11:14:37 - 11:31:29 | 7350 |
| Yakima | 11:23:02 | -40.4 | Dark | Down | 26.7 | 261.6 | Low | 11:14:36 - 11:31:28 | 7311 |
| Toppenish/White Swan | 11:23:01 | -40.4 | Dark | Down | 26.6 | 261.9 | Low | 11:14:35 - 11:31:27 | 7291 |
| PNWRO | 11:22:58 | -39.4 | Dark | Down | 25.6 | 263.2 | Low | 11:14:32 - 11:31:24 | 7269 |
| The Dalles | 11:23:01 | -41.0 | Dark | Down | 27.2 | 261.7 | Low | 11:14:35 - 11:31:27 | 7208 |
| Maupin | 11:23:00 | -41.1 | Dark | Down | 27.2 | 262.0 | Low | 11:14:34 - 11:31:26 | 7168 |
| Sisters | 11:22:58 | -41.6 | Dark | Down | 27.7 | 262.0 | Low | 11:14:32 - 11:31:24 | 7077 |
| Bend | 11:22:57 | -41.4 | Dark | Down | 27.6 | 262.3 | Low | 11:14:31 - 11:31:23 | 7056 |
| Oregon Observatory | 11:22:58 | -41.6 | Dark | Down | 27.7 | 262.3 | Low | 11:14:32 - 11:31:24 | 7038 |
| Chiloquin | 11:22:56 | -42.1 | Dark | Down | 28.2 | 262.7 | Low | 11:14:30 - 11:31:22 | 6902 |
| Dunrhomin | 11:22:30 | -29.8 | Dark | Down | 15.8 | 274.8 | Really Low | 11:14:04 - 11:30:56 | 6878 |
| Klamath Falls | 11:22:55 | -42.1 | Dark | Down | 28.1 | 263.0 | Low | 11:14:29 - 11:31:21 | 6868 |
| CU-SBO | 11:22:29 | -29.8 | Dark | Down | 15.8 | 274.8 | Really Low | 11:14:03 - 11:30:55 | 6852 |
| Cedarville | 11:22:51 | -41.0 | Dark | Down | 27.0 | 264.4 | Low | 11:14:25 - 11:31:17 | 6813 |
| Fall River/Burney | 11:22:52 | -42.0 | Dark | Down | 28.0 | 263.8 | Low | 11:14:26 - 11:31:18 | 6752 |
| Susanville | 11:22:49 | -41.5 | Dark | Down | 27.5 | 264.7 | Low | 11:14:23 - 11:31:15 | 6695 |
| Gimple | 11:22:49 | -41.7 | Dark | Down | 27.7 | 264.7 | Low | 11:14:23 - 11:31:15 | 6664 |
| Greenville | 11:22:50 | -41.8 | Dark | Down | 27.8 | 264.6 | Low | 11:14:24 - 11:31:16 | 6664 |
| Quincy | 11:22:49 | -41.8 | Dark | Down | 27.8 | 264.7 | Low | 11:14:23 - 11:31:15 | 6643 |
| Portola | 11:22:48 | -41.4 | Dark | Down | 27.4 | 265.1 | Low | 11:14:22 - 11:31:14 | 6635 |
| Reno | 11:22:46 | -41.0 | Dark | Down | 27.0 | 265.7 | Low | 11:14:20 - 11:31:12 | 6614 |
| Carson City | 11:22:46 | -41.0 | Dark | Down | 27.0 | 265.9 | Low | 11:14:20 - 11:31:12 | 6577 |
| Yerington | 11:22:44 | -40.5 | Dark | Down | 26.5 | 266.4 | Low | 11:14:18 - 11:31:10 | 6564 |
| Gardnerville | 11:22:45 | -41.0 | Dark | Down | 26.9 | 266.0 | Low | 11:14:19 - 11:31:11 | 6553 |
| Hawthorne | 11:22:43 | -40.1 | Dark | Down | 26.1 | 267.0 | Low | 11:14:17 - 11:31:09 | 6521 |
| Lee Vining | 11:22:42 | -40.6 | Dark | Down | 26.5 | 266.9 | Low | 11:14:16 - 11:31:08 | 6458 |
| Bishop | 11:22:40 | -40.0 | Dark | Down | 26.0 | 267.7 | Low | 11:14:14 - 11:31:06 | 6404 |
| Beatty | 11:22:37 | -38.7 | Dark | Down | 24.7 | 268.9 | Low | 11:14:11 - 11:31:03 | 6374 |
| Patrick | 11:22:30 | -36.4 | Dark | Down | 22.4 | 271.2 | Low | 11:14:04 - 11:30:56 | 6255 |
| Laughlin/Bullhead City | 11:22:31 | -37.0 | Dark | Down | 23.0 | 270.9 | Low | 11:14:05 - 11:30:57 | 6220 |
| Lake Havasu City | 11:22:29 | -36.8 | Dark | Down | 22.7 | 271.3 | Low | 11:14:03 - 11:30:55 | 6153 |
| George/Scottsdale | 11:22:25 | -34.7 | Dark | Down | 20.7 | 273.0 | Low | 11:13:59 - 11:30:51 | 6106 |
| Wildwood | 11:22:35 | -40.3 | Dark | Down | 26.3 | 269.1 | Low | 11:14:09 - 11:31:01 | 6058 |
| Idyllwild | 11:22:32 | -38.7 | Dark | Down | 24.7 | 270.4 | Low | 11:14:06 - 11:30:58 | 6043 |
| Calipatria | 11:22:30 | -37.7 | Dark | Down | 23.7 | 271.3 | Low | 11:14:04 - 11:30:56 | 5993 |
| Yuma | 11:22:27 | -36.9 | Dark | Down | 23.0 | 271.9 | Low | 11:14:01 - 11:30:53 | 5959 |
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 143685, (2025/11/28 11:27UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:29 0.8 16.34 91 Menkar 03:02:16.8 +04:05:21 2.5 11.68 66 5 Tau 03:30:52.4 +12:56:12 4.1 0.86 75 PPM 119071 03:25:24.1 +14:05:15 8.5 1.00 74 PPM 119108 03:28:34.2 +14:06:56 9.1 0.44 75 PPM 119123 03:29:49.0 +13:24:54 10.5 0.32 75 143685 03:29:13.0 +13:42:02 14.3 75 Positions are for J2000
Event circumstances last updated at 2022/10/29 01:43:52 UT
Marc W. Buie, Southwest Research Institute