Event between (342842) 08YB3 and star GA1200:08504553 with event index number of 2204346
Geocentric closest approach at 2025/09/11 10:10:45 UTC
J2000 position of star is 19:44:01.2 +30:18:55
Equinox of date position of star is 19:44:58.6 +30:22:28
Stellar brightness G=16.8,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 88 degrees from the moon.
Moon is 82% illuminated.
Apparent brightness V=21.7
[RECON map]
Object is 15.8 AU from the Sun
and 15.3 AU from the Earth.
Apparent velocity is 31.6
km/sec on the sky relative to the star, or,
10.2 arcsec/hr.
The 1-sigma error in the time of the event is 49 seconds.
The 1-sigma cross-track error in the shadow position is
1010 km.
The sky-plane scale is
11131.6 km/arcsec.
The object has an absolute magnitude Hv=9.5
Diameter=82.8 km assuming a 5% albedo -- 2.4 sec chord
Diameter=33.8 km assuming a 30% albedo -- 1.0 sec chord
Dynamical classification is CENTAURR
Star training set for 342842, (2025/09/11 10:13UT) Object RA Dec mag sep mel Vega 18:37:48.5 +38:48:31 0.0 16.16 97 37Gam Cyg 20:23:09.1 +40:20:24 2.2 12.62 78 12Phi Cyg 19:40:23.5 +30:12:50 5.8 1.02 89 PPM 083423 19:44:16.1 +30:17:42 7.3 0.19 88 PPM 083450 19:45:04.2 +30:17:13 9.4 0.09 88 342842 19:45:02.2 +30:22:42 16.8 88 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 31.9 km
RECON observability=0.7 and success probability=38.0%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Sleaford | 10:07:33 | -21.0 | Dark | Up | 17.5 | 297.2 | Really Low | 10:03:00 - 10:12:06 | 1296 |
| Kamloops | 10:07:47 | -28.3 | Dark | Up | 25.2 | 287.8 | Low | 10:03:14 - 10:12:20 | 833 |
| Kelowna | 10:07:46 | -28.6 | Dark | Up | 24.4 | 288.7 | Low | 10:03:13 - 10:12:19 | 760 |
| Peachland | 10:07:46 | -28.8 | Dark | Up | 24.6 | 288.6 | Low | 10:03:13 - 10:12:19 | 744 |
| Summerland | 10:07:46 | -28.9 | Dark | Up | 24.5 | 288.7 | Low | 10:03:13 - 10:12:19 | 730 |
| Penticton | 10:07:46 | -28.9 | Dark | Up | 24.4 | 288.8 | Low | 10:03:13 - 10:12:19 | 724 |
| Oliver | 10:07:46 | -29.2 | Dark | Up | 24.3 | 289.0 | Low | 10:03:13 - 10:12:19 | 687 |
| Anarchist Mountain Observatory | 10:07:46 | -29.2 | Dark | Up | 24.1 | 289.2 | Low | 10:03:13 - 10:12:19 | 672 |
| Okanogan | 10:07:46 | -29.8 | Dark | Up | 24.0 | 289.3 | Low | 10:03:13 - 10:12:19 | 600 |
| Brewster | 10:07:47 | -30.1 | Dark | Up | 24.0 | 289.3 | Low | 10:03:14 - 10:12:20 | 569 |
| Victoria | 10:07:51 | -31.2 | Dark | Up | 26.5 | 286.8 | Low | 10:03:18 - 10:12:24 | 562 |
| Manson/Chelan | 10:07:47 | -30.4 | Dark | Up | 24.2 | 289.1 | Low | 10:03:14 - 10:12:20 | 540 |
| Wenatchee | 10:07:48 | -30.9 | Dark | Up | 24.2 | 289.2 | Low | 10:03:15 - 10:12:21 | 488 |
| Ellensburg | 10:07:48 | -31.3 | Dark | Up | 24.2 | 289.3 | Low | 10:03:15 - 10:12:21 | 441 |
| Yakima | 10:07:48 | -31.6 | Dark | Up | 24.0 | 289.4 | Low | 10:03:15 - 10:12:21 | 398 |
| Toppenish/White Swan | 10:07:48 | -31.7 | Dark | Up | 23.9 | 289.6 | Low | 10:03:15 - 10:12:21 | 378 |
| PNWRO | 10:07:47 | -31.3 | Dark | Up | 22.8 | 290.7 | Low | 10:03:14 - 10:12:20 | 365 |
| The Dalles | 10:07:49 | -32.7 | Dark | Up | 24.1 | 289.5 | Low | 10:03:16 - 10:12:22 | 284 |
| Maupin | 10:07:50 | -32.9 | Dark | Up | 23.9 | 289.7 | Low | 10:03:17 - 10:12:23 | 242 |
| Dunrhomin | 10:07:36 | -27.6 | Dark | Up | 11.3 | 300.4 | Really Low | 10:03:03 - 10:12:09 | 163 |
| Nikitin | 10:07:36 | -27.8 | Dark | Up | 11.2 | 300.4 | Really Low | 10:03:03 - 10:12:09 | 145 |
| Sisters | 10:07:51 | -33.8 | Dark | Up | 23.9 | 289.8 | Low | 10:03:18 - 10:12:24 | 142 |
| CU-SBO | 10:07:36 | -27.8 | Dark | Up | 11.2 | 300.3 | Really Low | 10:03:03 - 10:12:09 | 136 |
| Bend | 10:07:51 | -33.9 | Dark | Up | 23.7 | 290.0 | Low | 10:03:18 - 10:12:24 | 122 |
| Oregon Observatory | 10:07:51 | -34.1 | Dark | Up | 23.7 | 290.0 | Low | 10:03:18 - 10:12:24 | 102 |
| Chiloquin | 10:07:52 | -35.3 | Dark | Up | 23.5 | 290.3 | Low | 10:03:19 - 10:12:25 | -41 |
| Klamath Falls | 10:07:52 | -35.5 | Dark | Up | 23.4 | 290.5 | Low | 10:03:19 - 10:12:25 | -75 |
| Cedarville | 10:07:51 | -35.3 | Dark | Up | 22.0 | 291.7 | Low | 10:03:18 - 10:12:24 | -119 |
| Fall River/Burney | 10:07:53 | -36.3 | Dark | Up | 22.7 | 291.2 | Low | 10:03:20 - 10:12:26 | -189 |
| Gimple | 10:07:53 | -36.7 | Dark | Up | 22.0 | 291.8 | Low | 10:03:20 - 10:12:26 | -272 |
| Greenville | 10:07:53 | -36.7 | Dark | Up | 22.0 | 291.8 | Low | 10:03:20 - 10:12:26 | -273 |
| Quincy | 10:07:53 | -36.9 | Dark | Up | 21.9 | 291.9 | Low | 10:03:20 - 10:12:26 | -293 |
| Portola | 10:07:53 | -36.7 | Dark | Up | 21.6 | 292.2 | Low | 10:03:20 - 10:12:26 | -298 |
| Reno | 10:07:52 | -36.6 | Dark | Up | 21.0 | 292.6 | Low | 10:03:19 - 10:12:25 | -313 |
| Carson City | 10:07:52 | -36.8 | Dark | Up | 20.8 | 292.7 | Low | 10:03:19 - 10:12:25 | -348 |
| Yerington | 10:07:52 | -36.7 | Dark | Up | 20.3 | 293.1 | Low | 10:03:19 - 10:12:25 | -355 |
| Gardnerville | 10:07:52 | -37.0 | Dark | Up | 20.7 | 292.9 | Low | 10:03:19 - 10:12:25 | -372 |
| Hawthorne | 10:07:52 | -36.7 | Dark | Up | 19.7 | 293.6 | Really Low | 10:03:19 - 10:12:25 | -391 |
| Lee Vining | 10:07:53 | -37.4 | Dark | Up | 19.9 | 293.5 | Really Low | 10:03:20 - 10:12:26 | -457 |
| Bishop | 10:07:52 | -37.4 | Dark | Up | 19.1 | 294.1 | Really Low | 10:03:19 - 10:12:25 | -501 |
| Beatty | 10:07:51 | -36.8 | Dark | Up | 17.7 | 295.0 | Really Low | 10:03:18 - 10:12:24 | -509 |
| Patrick | 10:07:49 | -36.0 | Dark | Up | 15.0 | 296.8 | Really Low | 10:03:16 - 10:12:22 | -578 |
| Laughlin/Bullhead City | 10:07:50 | -36.6 | Dark | Up | 15.4 | 296.5 | Really Low | 10:03:17 - 10:12:23 | -620 |
| Lake Havasu City | 10:07:50 | -36.9 | Dark | Up | 14.9 | 296.8 | Really Low | 10:03:17 - 10:12:23 | -677 |
| George/Scottsdale | 10:07:48 | -35.7 | Dark | Up | 12.7 | 298.1 | Really Low | 10:03:15 - 10:12:21 | -678 |
| Idyllwild | 10:07:54 | -38.9 | Dark | Up | 16.3 | 295.9 | Really Low | 10:03:21 - 10:12:27 | -812 |
| Wildwood | 10:07:56 | -39.8 | Dark | Up | 17.9 | 295.0 | Really Low | 10:03:23 - 10:12:29 | -821 |
| Calipatria | 10:07:53 | -38.5 | Dark | Up | 15.2 | 296.6 | Really Low | 10:03:20 - 10:12:26 | -839 |
| Yuma | 10:07:53 | -38.2 | Dark | Up | 14.3 | 297.1 | Really Low | 10:03:20 - 10:12:26 | -855 |
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 342842, (2025/09/11 10:13UT) Object RA Dec mag sep mel Vega 18:36:56.7 +38:47:07 0.0 16.16 97 37Gam Cyg 20:22:13.7 +40:15:24 2.2 12.62 78 12Phi Cyg 19:39:22.6 +30:09:13 5.8 1.02 89 PPM 083423 19:43:15.1 +30:13:57 7.3 0.19 88 PPM 083450 19:44:03.2 +30:13:26 9.4 0.09 88 342842 19:44:01.2 +30:18:55 16.8 88 Positions are for J2000
Event circumstances last updated at 2024/03/03 05:54:51 UT
Marc W. Buie, Southwest Research Institute