Event between (609221) 04VC131 and star GA1100:00668374 with event index number of 2789227
Geocentric closest approach at 2025/12/04 02:25:15 UTC
J2000 position of star is 04:32:44.7 +21:30:34
Equinox of date position of star is 04:34:10.3 +21:33:32
Stellar brightness G=0.0,
use SENSEUP=2 with the MallinCam and and exposure
time of 125 milli-seconds with the QHY174 camera.
Star is 11 degrees from the moon.
Moon is 99% illuminated.
Apparent brightness V=22.2
[RECON map]
Object is 41.0 AU from the Sun
and 40.0 AU from the Earth.
Apparent velocity is 25.3
km/sec on the sky relative to the star, or,
3.1 arcsec/hr.
The 1-sigma error in the time of the event is 78 seconds.
The 1-sigma cross-track error in the shadow position is
1468 km.
The sky-plane scale is
28987.1 km/arcsec.
The object has an absolute magnitude Hv=6.1
Diameter=351.6 km assuming a 5% albedo -- 14.4 sec chord
Diameter=143.5 km assuming a 30% albedo -- 5.9 sec chord
Dynamical classification is CLASSICAL
Star training set for 609221, (2025/12/04 02:25UT) Object RA Dec mag sep mel Aldebaran 04:37:24.7 +16:33:34 0.8 5.06 14 3Iot Aur 04:58:41.2 +33:12:17 2.7 12.83 18 PPM 093535 04:29:33.3 +21:40:32 5.9 1.11 10 PPM 093627 04:37:50.3 +21:44:24 8.5 0.84 12 PPM 093580 04:33:27.3 +21:41:22 9.0 0.23 11 PPM 093590 04:34:30.3 +21:28:26 10.7 0.10 11 609221 04:34:17.1 +21:33:46 0.0 12 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 24.0 km
RECON observability=1.0 and success probability=73.9%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Kamloops | 02:27:26 | -22.6 | Dark | Up | 23.6 | 84.4 | Low | 02:20:26 - 02:34:27 | 1290 |
| Victoria | 02:27:35 | -20.3 | Dark | Up | 21.4 | 81.3 | Low | 02:20:35 - 02:34:36 | 1245 |
| Peachland | 02:27:29 | -22.9 | Dark | Up | 23.9 | 84.5 | Low | 02:20:29 - 02:34:30 | 1218 |
| Kelowna | 02:27:29 | -23.1 | Dark | Up | 24.1 | 84.7 | Low | 02:20:28 - 02:34:29 | 1216 |
| Summerland | 02:27:30 | -22.9 | Dark | Up | 24.0 | 84.5 | Low | 02:20:30 - 02:34:31 | 1206 |
| Penticton | 02:27:30 | -23.0 | Dark | Up | 24.0 | 84.5 | Low | 02:20:30 - 02:34:31 | 1199 |
| Oliver | 02:27:31 | -22.9 | Dark | Up | 24.0 | 84.4 | Low | 02:20:31 - 02:34:32 | 1177 |
| Anarchist Mountain Observatory | 02:27:32 | -23.0 | Dark | Up | 24.1 | 84.4 | Low | 02:20:32 - 02:34:33 | 1162 |
| Okanogan | 02:27:34 | -22.8 | Dark | Up | 23.9 | 84.0 | Low | 02:20:34 - 02:34:35 | 1127 |
| Brewster | 02:27:35 | -22.6 | Dark | Up | 23.8 | 83.7 | Low | 02:20:35 - 02:34:36 | 1116 |
| Manson/Chelan | 02:27:36 | -22.4 | Dark | Up | 23.5 | 83.4 | Low | 02:20:36 - 02:34:37 | 1113 |
| Wenatchee | 02:27:38 | -22.2 | Dark | Up | 23.3 | 83.1 | Low | 02:20:38 - 02:34:39 | 1088 |
| Ellensburg | 02:27:39 | -22.0 | Dark | Up | 23.1 | 82.7 | Low | 02:20:39 - 02:34:40 | 1068 |
| Yakima | 02:27:41 | -21.9 | Dark | Up | 23.1 | 82.6 | Low | 02:20:41 - 02:34:42 | 1042 |
| Toppenish/White Swan | 02:27:42 | -22.0 | Dark | Up | 23.2 | 82.6 | Low | 02:20:41 - 02:34:42 | 1023 |
| The Dalles | 02:27:45 | -21.3 | Dark | Up | 22.5 | 81.7 | Low | 02:20:44 - 02:34:45 | 995 |
| Sleaford | 02:27:11 | -31.6 | Dark | Up | 32.6 | 96.5 | Up | 02:20:10 - 02:34:11 | 987 |
| Maupin | 02:27:46 | -21.3 | Dark | Up | 22.5 | 81.6 | Low | 02:20:46 - 02:34:47 | 964 |
| PNWRO | 02:27:42 | -22.9 | Dark | Up | 24.2 | 83.5 | Low | 02:20:42 - 02:34:43 | 954 |
| Sisters | 02:27:49 | -20.8 | Dark | Up | 22.1 | 81.0 | Low | 02:20:49 - 02:34:50 | 921 |
| Bend | 02:27:50 | -20.9 | Dark | Up | 22.2 | 81.0 | Low | 02:20:49 - 02:34:50 | 897 |
| Oregon Observatory | 02:27:51 | -20.8 | Dark | Up | 22.1 | 80.9 | Low | 02:20:50 - 02:34:51 | 889 |
| Chiloquin | 02:27:55 | -20.3 | Dark | Up | 21.6 | 80.1 | Low | 02:20:55 - 02:34:56 | 811 |
| Klamath Falls | 02:27:57 | -20.2 | Dark | Up | 21.6 | 80.0 | Low | 02:20:56 - 02:34:57 | 785 |
| Fall River/Burney | 02:28:00 | -20.3 | Dark | Up | 21.7 | 79.8 | Low | 02:21:00 - 02:35:01 | 689 |
| Cedarville | 02:27:58 | -21.3 | Dark | Up | 22.7 | 80.7 | Low | 02:20:58 - 02:34:59 | 684 |
| Greenville | 02:28:03 | -20.4 | Dark | Up | 21.9 | 79.7 | Low | 02:21:02 - 02:35:03 | 608 |
| Gimple | 02:28:03 | -20.5 | Dark | Up | 21.9 | 79.8 | Low | 02:21:02 - 02:35:03 | 606 |
| Quincy | 02:28:03 | -20.4 | Dark | Up | 21.8 | 79.7 | Low | 02:21:03 - 02:35:04 | 593 |
| Portola | 02:28:04 | -20.7 | Dark | Up | 22.2 | 79.9 | Low | 02:21:03 - 02:35:04 | 569 |
| Reno | 02:28:04 | -21.2 | Dark | Up | 22.6 | 80.2 | Low | 02:21:04 - 02:35:05 | 527 |
| Carson City | 02:28:05 | -21.1 | Dark | Up | 22.6 | 80.0 | Low | 02:21:05 - 02:35:06 | 500 |
| Gardnerville | 02:28:06 | -21.1 | Dark | Up | 22.6 | 80.0 | Low | 02:21:06 - 02:35:07 | 480 |
| Yerington | 02:28:06 | -21.5 | Dark | Up | 23.0 | 80.3 | Low | 02:21:05 - 02:35:06 | 464 |
| Hawthorne | 02:28:07 | -21.9 | Dark | Up | 23.4 | 80.4 | Low | 02:21:06 - 02:35:07 | 411 |
| Lee Vining | 02:28:09 | -21.4 | Dark | Up | 22.9 | 79.9 | Low | 02:21:08 - 02:35:09 | 385 |
| Bishop | 02:28:10 | -21.8 | Dark | Up | 23.4 | 80.1 | Low | 02:21:10 - 02:35:11 | 313 |
| Beatty | 02:28:10 | -23.0 | Dark | Up | 24.6 | 80.8 | Low | 02:21:10 - 02:35:11 | 221 |
| Dunrhomin | 02:27:48 | -32.3 | Dark | Up | 33.8 | 89.4 | Up | 02:20:48 - 02:34:49 | 96 |
| Nikitin | 02:27:49 | -32.3 | Dark | Up | 33.8 | 89.2 | Up | 02:20:49 - 02:34:50 | 82 |
| CU-SBO | 02:27:49 | -32.2 | Dark | Up | 33.8 | 89.1 | Up | 02:20:49 - 02:34:50 | 79 |
| Wildwood | 02:28:20 | -21.0 | Dark | Up | 22.6 | 78.6 | Low | 02:21:19 - 02:35:20 | 60 |
| Laughlin/Bullhead City | 02:28:14 | -24.4 | Dark | Up | 26.1 | 81.1 | Low | 02:21:13 - 02:35:14 | 4 |
| Patrick | 02:28:13 | -25.0 | Dark | Up | 26.7 | 81.6 | Low | 02:21:12 - 02:35:13 | 0 |
| Idyllwild | 02:28:20 | -22.4 | Dark | Up | 24.1 | 79.4 | Low | 02:21:19 - 02:35:20 | -37 |
| Lake Havasu City | 02:28:16 | -24.5 | Dark | Up | 26.2 | 80.9 | Low | 02:21:15 - 02:35:16 | -60 |
| Calipatria | 02:28:20 | -23.3 | Dark | Up | 25.0 | 79.7 | Low | 02:21:20 - 02:35:21 | -131 |
| Yuma | 02:28:21 | -23.9 | Dark | Up | 25.6 | 79.9 | Low | 02:21:20 - 02:35:21 | -200 |
| George/Scottsdale | 02:28:15 | -26.4 | Dark | Up | 28.1 | 81.7 | Low | 02:21:15 - 02:35:16 | -214 |
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 609221, (2025/12/04 02:25UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:29 0.8 5.06 14 3Iot Aur 04:56:59.6 +33:09:58 2.7 12.83 18 PPM 093535 04:28:00.9 +21:37:10 5.9 1.11 10 PPM 093627 04:36:17.7 +21:41:20 8.5 0.84 12 PPM 093580 04:31:54.8 +21:38:09 9.0 0.23 11 PPM 093590 04:32:57.9 +21:25:15 10.7 0.10 11 609221 04:32:44.7 +21:30:34 0.0 11 Positions are for J2000
Event circumstances last updated at 2024/01/08 05:17:35 UT
Marc W. Buie, Southwest Research Institute