Event between (143685) 03SS317 and star GA1040:00357714 with event index number of 2468373
Geocentric closest approach at 2025/09/03 06:47:51 UTC
J2000 position of star is 03:36:05.4 +14:16:10
Equinox of date position of star is 03:37:21.8 +14:20:38
Stellar brightness G=16.9,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 129 degrees from the moon.
Moon is 78% illuminated.
TNO apparent brightness V=23.0
[RECON map]
TNO is 29.0 AU from the Sun
and 28.8 AU from the Earth.
The TNO is moving 3.6
km/sec on the sky relative to the star, or,
0.6 arcsec/hr.
The 1-sigma error in the time of the event is 364 seconds.
The 1-sigma cross-track error in the shadow position is
2511 km.
The sky-plane scale is
20861.8 km/arcsec.
The TNO has an absolute magnitude Hv=8.2
Diameter=166.0 km assuming a 5% albedo -- 38.8 sec chord
Diameter=67.8 km assuming a 30% albedo -- 15.8 sec chord
Dynamical classification is 4:3E
Star training set for 143685, (2025/09/03 06:48UT) Object RA Dec mag sep mel Aldebaran 04:37:23.8 +16:33:32 0.8 14.59 143 Menkar 03:03:37.5 +04:11:20 2.5 13.16 117 PPM 119236 03:39:14.6 +15:30:47 6.4 1.23 130 PPM 119173 03:34:46.9 +13:52:02 8.2 0.82 128 PPM 119205 03:36:54.0 +14:15:30 9.8 0.18 129 143685 03:37:31.4 +14:21:11 16.9 130 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
2.5 sigma about the mid-time.
The median site spacing is 0.0 km
RECON observability=0.0 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) |
| Wildwood | 06:45:11 | -45.4 | Dark | Up | 9.0 | 78.8 | Really Low | 06:30:11 - 07:00:11 | 7429 |
| Idyllwild | 06:45:34 | -46.4 | Dark | Up | 10.6 | 79.8 | Really Low | 06:30:34 - 07:00:34 | 7409 |
| Calipatria | 06:46:04 | -47.4 | Dark | Up | 11.5 | 80.4 | Really Low | 06:31:04 - 07:01:04 | 7396 |
| Yuma | 06:46:23 | -48.1 | Dark | Up | 12.3 | 80.8 | Really Low | 06:31:23 - 07:01:23 | 7385 |
| Bishop | 06:43:27 | -42.4 | Dark | Up | 9.5 | 79.2 | Really Low | 06:28:27 - 06:58:27 | 7370 |
| Lee Vining | 06:43:03 | -41.5 | Dark | Up | 8.9 | 78.8 | Really Low | 06:28:03 - 06:58:03 | 7366 |
| Parker | 06:45:46 | -46.7 | Dark | Up | 12.7 | 81.2 | Really Low | 06:30:46 - 07:00:46 | 7362 |
| Beatty | 06:43:56 | -43.3 | Dark | Up | 10.8 | 80.2 | Really Low | 06:28:56 - 06:58:56 | 7359 |
| Lake Havasu City | 06:45:32 | -46.4 | Dark | Up | 12.6 | 81.2 | Really Low | 06:30:32 - 07:00:32 | 7358 |
| Mohave Valley | 06:45:17 | -45.9 | Dark | Up | 12.5 | 81.2 | Really Low | 06:30:17 - 07:00:17 | 7357 |
| Laughlin/Bullhead City | 06:45:06 | -45.6 | Dark | Up | 12.5 | 81.2 | Really Low | 06:30:06 - 07:00:06 | 7354 |
| Indian Springs | 06:44:15 | -44.0 | Dark | Up | 11.6 | 80.8 | Really Low | 06:29:15 - 06:59:15 | 7349 |
| Gardnerville | 06:42:28 | -40.4 | Dark | Up | 8.5 | 78.5 | Really Low | 06:27:28 - 06:57:28 | 7349 |
| Hawthorne | 06:42:51 | -41.2 | Dark | Up | 9.4 | 79.2 | Really Low | 06:27:51 - 06:57:51 | 7348 |
| Henderson | 06:44:38 | -44.7 | Dark | Up | 12.2 | 81.1 | Really Low | 06:29:38 - 06:59:38 | 7347 |
| Kingman/Dolan Springs | 06:45:11 | -45.8 | Dark | Up | 12.9 | 81.5 | Really Low | 06:30:11 - 07:00:11 | 7345 |
| Carson City | 06:42:18 | -40.1 | Dark | Up | 8.5 | 78.5 | Really Low | 06:27:18 - 06:57:18 | 7343 |
| Tonopah | 06:43:13 | -42.1 | Dark | Up | 10.5 | 80.0 | Really Low | 06:28:13 - 06:58:13 | 7343 |
| Yerington | 06:42:31 | -40.5 | Dark | Up | 9.0 | 78.9 | Really Low | 06:27:31 - 06:57:31 | 7342 |
| Patrick | 06:45:06 | -45.6 | Dark | Up | 13.1 | 81.6 | Really Low | 06:30:06 - 07:00:06 | 7338 |
| Reno | 06:42:06 | -39.8 | Dark | Up | 8.5 | 78.5 | Really Low | 06:27:06 - 06:57:06 | 7335 |
| Portola | 06:41:50 | -39.3 | Dark | Up | 8.0 | 78.1 | Really Low | 06:26:50 - 06:56:50 | 7333 |
| Quincy | 06:41:45 | -39.0 | Dark | Up | 7.7 | 77.8 | Really Low | 06:26:45 - 06:56:45 | 7333 |
| Greenville | 06:41:38 | -38.8 | Dark | Up | 7.7 | 77.8 | Really Low | 06:26:38 - 06:56:38 | 7327 |
| Gimple | 06:41:38 | -38.9 | Dark | Up | 7.8 | 77.9 | Really Low | 06:26:38 - 06:56:38 | 7327 |
| George/Scottsdale | 06:46:17 | -47.8 | Dark | Up | 14.7 | 82.5 | Really Low | 06:31:17 - 07:01:17 | 7319 |
| Susanville | 06:41:35 | -38.7 | Dark | Up | 8.0 | 78.0 | Really Low | 06:26:35 - 06:56:35 | 7318 |
| Fall River/Burney | 06:41:06 | -37.8 | Dark | Up | 7.5 | 77.6 | Really Low | 06:26:06 - 06:56:06 | 7305 |
| Cedarville | 06:41:00 | -37.8 | Dark | Up | 8.5 | 78.4 | Really Low | 06:26:00 - 06:56:00 | 7284 |
| Klamath Falls | 06:40:26 | -36.6 | Dark | Up | 7.3 | 77.4 | Really Low | 06:25:26 - 06:55:26 | 7272 |
| Lakeview | 06:40:40 | -37.1 | Dark | Up | 8.4 | 78.3 | Really Low | 06:25:40 - 06:55:40 | 7265 |
| Chiloquin | 06:40:16 | -36.3 | Dark | Up | 7.3 | 77.3 | Really Low | 06:25:16 - 06:55:16 | 7262 |
| North Lake | 06:40:05 | -35.9 | Dark | Up | 8.1 | 78.0 | Really Low | 06:25:05 - 06:55:05 | 7235 |
| Oregon Observatory | 06:39:39 | -35.2 | Dark | Up | 7.8 | 77.7 | Really Low | 06:24:39 - 06:54:39 | 7217 |
| Bend | 06:39:38 | -35.0 | Dark | Up | 7.9 | 77.8 | Really Low | 06:24:38 - 06:54:38 | 7210 |
| Sisters | 06:39:25 | -34.7 | Dark | Up | 7.7 | 77.6 | Really Low | 06:24:25 - 06:54:25 | 7203 |
| Maupin | 06:39:02 | -34.1 | Dark | Up | 8.2 | 78.0 | Really Low | 06:24:02 - 06:54:02 | 7169 |
| The Dalles | 06:38:50 | -33.6 | Dark | Up | 8.2 | 77.9 | Really Low | 06:23:50 - 06:53:50 | 7154 |
| Goldendale | 06:38:46 | -33.5 | Dark | Up | 8.5 | 78.2 | Really Low | 06:23:46 - 06:53:46 | 7144 |
| PNWRO | 06:38:59 | -33.9 | Dark | Up | 9.9 | 79.6 | Really Low | 06:23:59 - 06:53:59 | 7124 |
| Toppenish/White Swan | 06:38:32 | -33.1 | Dark | Up | 8.8 | 78.6 | Really Low | 06:23:32 - 06:53:32 | 7120 |
| Yakima | 06:38:27 | -32.9 | Dark | Up | 8.8 | 78.5 | Really Low | 06:23:27 - 06:53:27 | 7113 |
| Ellensburg | 06:38:15 | -32.5 | Dark | Up | 8.8 | 78.5 | Really Low | 06:23:15 - 06:53:15 | 7097 |
| Wenatchee | 06:38:04 | -32.2 | Dark | Up | 9.0 | 78.7 | Really Low | 06:23:04 - 06:53:04 | 7079 |
| Manson/Chelan | 06:37:50 | -31.8 | Dark | Up | 9.2 | 78.8 | Really Low | 06:22:50 - 06:52:50 | 7059 |
| CU-SBO | 06:43:34 | -42.4 | Dark | Up | 20.0 | 87.8 | Really Low | 06:28:34 - 06:58:34 | 7058 |
| Dunrhomin | 06:43:30 | -42.2 | Dark | Up | 20.0 | 88.0 | Low | 06:28:30 - 06:58:30 | 7050 |
| Brewster | 06:37:46 | -31.7 | Dark | Up | 9.4 | 79.1 | Really Low | 06:22:46 - 06:52:46 | 7048 |
| Victoria | 06:37:05 | -30.2 | Dark | Up | 7.1 | 76.4 | Really Low | 06:22:05 - 06:52:05 | 7044 |
| Okanogan | 06:37:43 | -31.5 | Dark | Up | 9.6 | 79.3 | Really Low | 06:22:43 - 06:52:43 | 7036 |
| Tonasket | 06:37:36 | -31.2 | Dark | Up | 9.8 | 79.4 | Really Low | 06:22:36 - 06:52:36 | 7021 |
| Anarchist Mountain Observatory | 06:37:24 | -30.9 | Dark | Up | 9.8 | 79.5 | Really Low | 06:22:24 - 06:52:24 | 7008 |
| Oliver | 06:37:20 | -30.7 | Dark | Up | 9.7 | 79.4 | Really Low | 06:22:20 - 06:52:20 | 7001 |
| Penticton | 06:37:11 | -30.4 | Dark | Up | 9.8 | 79.4 | Really Low | 06:22:11 - 06:52:11 | 6985 |
| Summerland | 06:37:05 | -30.3 | Dark | Up | 9.7 | 79.3 | Really Low | 06:22:05 - 06:52:05 | 6983 |
| Peachland | 06:37:01 | -30.1 | Dark | Up | 9.6 | 79.3 | Really Low | 06:22:01 - 06:52:01 | 6977 |
| Kelowna | 06:36:59 | -30.1 | Dark | Up | 9.9 | 79.5 | Really Low | 06:21:59 - 06:51:59 | 6970 |
| Kamloops | 06:36:29 | -29.1 | Dark | Up | 9.4 | 78.9 | Really Low | 06:21:29 - 06:51:29 | 6938 |
| Sleaford | 06:37:16 | -30.2 | Dark | Down | 18.6 | 90.5 | Really Low | 06:22:16 - 06:52:16 | 6694 |
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, (2025/09/03 06:48UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:29 0.8 14.59 143 Menkar 03:02:16.8 +04:05:21 2.5 13.16 117 PPM 119236 03:37:47.9 +15:25:49 6.4 1.23 130 PPM 119173 03:33:21.2 +13:46:56 8.2 0.82 128 PPM 119205 03:35:28.0 +14:10:28 9.8 0.18 129 143685 03:36:05.4 +14:16:10 16.9 129 Positions are for J2000
Event circumstances last updated at 2022/10/28 02:49:11 UT
Marc W. Buie, Southwest Research Institute