Event between (525816) 05SF278 and star GA1040:00554431 with event index number of 2167431
Geocentric closest approach at 2026/10/15 05:41:26 UTC
J2000 position of star is 04:40:42.7 +14:47:46
Equinox of date position of star is 04:42:01.4 +14:50:22
Stellar brightness G=16.4,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 167 degrees from the moon.
Moon is 20% illuminated.
Apparent brightness V=22.3
[RECON map]
Object is 35.6 AU from the Sun
and 34.9 AU from the Earth.
Apparent velocity is 14.7
km/sec on the sky relative to the star, or,
2.1 arcsec/hr.
The 1-sigma error in the time of the event is 147 seconds.
The 1-sigma cross-track error in the shadow position is
1707 km.
The sky-plane scale is
25321.4 km/arcsec.
The object has an absolute magnitude Hv=6.7
Diameter=279.3 km assuming a 5% albedo -- 18.6 sec chord
Diameter=114.0 km assuming a 30% albedo -- 7.6 sec chord
Dynamical classification is 7:4EEE
Star training set for 525816, (2026/10/15 05:49UT) Object RA Dec mag sep mel Aldebaran 04:37:27.6 +16:33:40 0.8 2.06 169 Bellatrix 05:26:34.2 +06:22:18 1.6 13.79 157 91Sig1Tau 04:40:41.1 +15:51:02 5.3 1.07 168 PPM 120173 04:44:30.6 +14:51:47 7.6 0.55 167 PPM 120143 04:42:58.5 +14:52:23 8.8 0.18 167 525816 04:42:14.0 +14:50:46 16.4 167 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 56.3 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 | 05:44:36 | -40.8 | Dark | Down | 17.3 | 87.6 | Really Low | 05:31:51 - 05:57:22 | 12465 |
| Victoria | 05:44:52 | -41.0 | Dark | Down | 15.2 | 84.7 | Really Low | 05:32:06 - 05:57:37 | 12419 |
| Peachland | 05:44:43 | -41.8 | Dark | Down | 17.7 | 87.8 | Really Low | 05:31:58 - 05:57:29 | 12407 |
| Kelowna | 05:44:40 | -41.8 | Dark | Down | 17.9 | 88.0 | Really Low | 05:31:55 - 05:57:26 | 12407 |
| Summerland | 05:44:43 | -41.9 | Dark | Down | 17.7 | 87.8 | Really Low | 05:31:57 - 05:57:28 | 12398 |
| Penticton | 05:44:44 | -42.0 | Dark | Down | 17.8 | 87.9 | Really Low | 05:31:58 - 05:57:29 | 12392 |
| Oliver | 05:44:47 | -42.3 | Dark | Down | 17.8 | 87.8 | Really Low | 05:32:02 - 05:57:33 | 12374 |
| Anarchist Mountain Observatory | 05:44:47 | -42.5 | Dark | Down | 17.9 | 87.9 | Really Low | 05:32:02 - 05:57:33 | 12362 |
| Okanogan | 05:44:51 | -42.9 | Dark | Down | 17.8 | 87.5 | Really Low | 05:32:05 - 05:57:36 | 12332 |
| Brewster | 05:44:53 | -43.0 | Dark | Down | 17.6 | 87.3 | Really Low | 05:32:08 - 05:57:39 | 12322 |
| Manson/Chelan | 05:44:56 | -43.0 | Dark | Down | 17.4 | 87.0 | Really Low | 05:32:10 - 05:57:41 | 12319 |
| Wenatchee | 05:44:56 | -43.3 | Dark | Down | 17.2 | 86.7 | Really Low | 05:32:11 - 05:57:42 | 12297 |
| Ellensburg | 05:45:03 | -43.5 | Dark | Down | 17.1 | 86.4 | Really Low | 05:32:18 - 05:57:49 | 12280 |
| Yakima | 05:45:04 | -43.8 | Dark | Down | 17.0 | 86.3 | Really Low | 05:32:18 - 05:57:49 | 12258 |
| Toppenish/White Swan | 05:45:06 | -44.0 | Dark | Down | 17.1 | 86.3 | Really Low | 05:32:20 - 05:57:51 | 12242 |
| Sleaford | 05:44:14 | -44.4 | Dark | Down | 26.1 | 99.6 | Low | 05:31:29 - 05:57:00 | 12229 |
| The Dalles | 05:45:11 | -44.2 | Dark | Down | 16.6 | 85.6 | Really Low | 05:32:25 - 05:57:56 | 12216 |
| Maupin | 05:45:15 | -44.5 | Dark | Down | 16.6 | 85.5 | Really Low | 05:32:30 - 05:58:01 | 12190 |
| PNWRO | 05:45:07 | -45.0 | Dark | Down | 18.2 | 87.3 | Really Low | 05:32:22 - 05:57:53 | 12188 |
| Sisters | 05:45:20 | -44.9 | Dark | Down | 16.2 | 84.9 | Really Low | 05:32:35 - 05:58:06 | 12150 |
| Bend | 05:45:22 | -45.2 | Dark | Down | 16.4 | 85.1 | Really Low | 05:32:36 - 05:58:07 | 12131 |
| Oregon Observatory | 05:45:22 | -45.2 | Dark | Down | 16.3 | 84.9 | Really Low | 05:32:37 - 05:58:08 | 12124 |
| Chiloquin | 05:45:31 | -45.9 | Dark | Down | 15.9 | 84.3 | Really Low | 05:32:45 - 05:58:16 | 12054 |
| Klamath Falls | 05:45:31 | -46.2 | Dark | Down | 15.9 | 84.2 | Really Low | 05:32:46 - 05:58:17 | 12031 |
| Cedarville | 05:45:35 | -47.6 | Dark | Down | 17.0 | 85.1 | Really Low | 05:32:49 - 05:58:20 | 11950 |
| Fall River/Burney | 05:45:41 | -47.2 | Dark | Down | 16.1 | 84.2 | Really Low | 05:32:56 - 05:58:27 | 11948 |
| Greenville | 05:45:47 | -48.1 | Dark | Down | 16.3 | 84.2 | Really Low | 05:33:01 - 05:58:32 | 11879 |
| Gimple | 05:45:47 | -48.1 | Dark | Down | 16.4 | 84.3 | Really Low | 05:33:01 - 05:58:32 | 11877 |
| Quincy | 05:45:48 | -48.2 | Dark | Down | 16.3 | 84.2 | Really Low | 05:33:02 - 05:58:33 | 11866 |
| Portola | 05:45:49 | -48.6 | Dark | Down | 16.7 | 84.4 | Really Low | 05:33:03 - 05:58:34 | 11847 |
| Reno | 05:45:49 | -49.1 | Dark | Down | 17.2 | 84.7 | Really Low | 05:33:03 - 05:58:34 | 11813 |
| Carson City | 05:45:51 | -49.4 | Dark | Down | 17.2 | 84.7 | Really Low | 05:33:05 - 05:58:36 | 11789 |
| Gardnerville | 05:45:54 | -49.6 | Dark | Down | 17.2 | 84.6 | Really Low | 05:33:09 - 05:58:40 | 11771 |
| Yerington | 05:45:51 | -49.9 | Dark | Down | 17.6 | 85.0 | Really Low | 05:33:06 - 05:58:37 | 11760 |
| Hawthorne | 05:45:54 | -50.5 | Dark | Down | 18.0 | 85.2 | Really Low | 05:33:09 - 05:58:40 | 11715 |
| Lee Vining | 05:45:59 | -50.6 | Dark | Down | 17.6 | 84.7 | Really Low | 05:33:13 - 05:58:44 | 11689 |
| Bishop | 05:46:00 | -51.4 | Dark | Down | 18.1 | 84.9 | Really Low | 05:33:15 - 05:58:46 | 11629 |
| Beatty | 05:46:03 | -52.7 | Dark | Down | 19.4 | 85.7 | Really Low | 05:33:17 - 05:58:48 | 11553 |
| Dunrhomin | 05:45:27 | -55.5 | Dark | Down | 28.3 | 94.4 | Low | 05:32:41 - 05:58:12 | 11475 |
| Nikitin | 05:45:28 | -55.6 | Dark | Down | 28.3 | 94.3 | Low | 05:32:42 - 05:58:13 | 11462 |
| CU-SBO | 05:45:28 | -55.7 | Dark | Down | 28.3 | 94.2 | Low | 05:32:42 - 05:58:13 | 11460 |
| Wildwood | 05:46:22 | -53.4 | Dark | Down | 17.7 | 83.8 | Really Low | 05:33:36 - 05:59:07 | 11398 |
| Laughlin/Bullhead City | 05:46:11 | -55.2 | Dark | Down | 21.1 | 86.4 | Low | 05:33:26 - 05:58:57 | 11367 |
| Patrick | 05:46:06 | -55.4 | Dark | Down | 21.6 | 86.8 | Low | 05:33:21 - 05:58:52 | 11366 |
| Idyllwild | 05:46:20 | -54.9 | Dark | Down | 19.2 | 84.7 | Really Low | 05:33:34 - 05:59:05 | 11320 |
| Lake Havasu City | 05:46:14 | -55.8 | Dark | Down | 21.2 | 86.2 | Low | 05:33:29 - 05:59:00 | 11310 |
| Calipatria | 05:46:24 | -56.0 | Dark | Down | 20.2 | 85.1 | Low | 05:33:38 - 05:59:09 | 11240 |
| Yuma | 05:46:23 | -56.9 | Dark | Down | 20.9 | 85.4 | Low | 05:33:38 - 05:59:09 | 11181 |
| George/Scottsdale | 05:46:16 | -57.8 | Dark | Down | 23.2 | 87.3 | Low | 05:33:30 - 05:59:01 | 11181 |
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 525816, (2026/10/15 05:49UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:29 0.8 2.06 169 Bellatrix 05:25:07.8 +06:20:58 1.6 13.79 157 91Sig1Tau 04:39:09.2 +15:47:58 5.3 1.07 168 PPM 120173 04:42:59.3 +14:48:52 7.6 0.55 167 PPM 120143 04:41:27.2 +14:49:24 8.8 0.18 167 525816 04:40:42.7 +14:47:46 16.4 167 Positions are for J2000
Event circumstances last updated at 2023/01/29 03:36:42 UT
Marc W. Buie, Southwest Research Institute