Event between (308460) 05SC278 and star GA1040:00229386 with event index number of 1481980
Geocentric closest approach at 2025/10/16 04:16:58 UTC
J2000 position of star is 02:24:53.0 +14:40:31
Equinox of date position of star is 02:26:01.5 +14:46:09
Stellar brightness G=12.2,
use SENSEUP=16
Star is 104 degrees from the moon.
Moon is 25% illuminated.
TNO apparent brightness V=22.5
[RECON map]
TNO is 33.0 AU from the Sun
and 32.0 AU from the Earth.
The TNO is moving 23.5
km/sec on the sky relative to the star, or,
3.6 arcsec/hr.
The 1-sigma error in the time of the event is 145 seconds.
The 1-sigma cross-track error in the shadow position is
1880 km.
The sky-plane scale is
23243.8 km/arcsec.
The TNO has an absolute magnitude Hv=7.3
Diameter=208.9 km assuming a 5% albedo -- 8.9 sec chord
Diameter=85.3 km assuming a 30% albedo -- 3.6 sec chord
Dynamical classification is 5:4E
Star training set for 308460, (2025/10/16 04:17UT) Object RA Dec mag sep mel Aldebaran 04:37:24.2 +16:33:33 0.8 31.57 73 6Bet Ari 01:56:04.2 +20:55:59 2.6 9.45 108 29 Ari 02:34:19.2 +15:08:50 6.0 1.97 102 PPM 118192 02:25:52.2 +15:38:25 7.9 0.86 104 PPM 118201 02:26:15.0 +14:47:04 9.7 0.01 104 308460 02:26:17.6 +14:47:27 12.2 104 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 14.4 km
RECON observability=1.0 and success probability=12.3%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Victoria | 04:18:43 | -29.4 | Dark | Down | 24.1 | 95.0 | Low | 04:06:08 - 04:31:19 | 3160 |
| Clarence Fulton | 04:18:32 | -31.1 | Dark | Down | 26.5 | 99.1 | Low | 04:05:57 - 04:31:08 | 3146 |
| Peachland | 04:18:35 | -31.1 | Dark | Down | 26.3 | 98.5 | Low | 04:05:59 - 04:31:10 | 3132 |
| Kelowna | 04:18:34 | -31.2 | Dark | Down | 26.5 | 98.8 | Low | 04:05:59 - 04:31:10 | 3130 |
| Summerland | 04:18:36 | -31.2 | Dark | Down | 26.4 | 98.5 | Low | 04:06:00 - 04:31:11 | 3122 |
| Penticton | 04:18:36 | -31.3 | Dark | Down | 26.5 | 98.5 | Low | 04:06:00 - 04:31:11 | 3116 |
| Oliver | 04:18:37 | -31.4 | Dark | Down | 26.6 | 98.4 | Low | 04:06:01 - 04:31:12 | 3098 |
| Anarchist Mountain Observatory | 04:18:38 | -31.6 | Dark | Down | 26.7 | 98.4 | Low | 04:06:02 - 04:31:13 | 3085 |
| Tonasket | 04:18:39 | -31.7 | Dark | Down | 26.7 | 98.2 | Low | 04:06:03 - 04:31:14 | 3070 |
| Okanogan | 04:18:40 | -31.8 | Dark | Down | 26.7 | 97.9 | Low | 04:06:05 - 04:31:16 | 3056 |
| Brewster | 04:18:42 | -31.8 | Dark | Down | 26.6 | 97.7 | Low | 04:06:06 - 04:31:17 | 3047 |
| Manson/Chelan | 04:18:43 | -31.6 | Dark | Down | 26.4 | 97.3 | Low | 04:06:08 - 04:31:19 | 3046 |
| Entiat | 04:18:44 | -31.7 | Dark | Down | 26.3 | 97.1 | Low | 04:06:08 - 04:31:19 | 3036 |
| Wenatchee | 04:18:45 | -31.7 | Dark | Down | 26.3 | 96.9 | Low | 04:06:10 - 04:31:21 | 3025 |
| Ellensburg | 04:18:47 | -31.8 | Dark | Down | 26.2 | 96.5 | Low | 04:06:11 - 04:31:22 | 3008 |
| Yakima | 04:18:49 | -31.9 | Dark | Down | 26.3 | 96.3 | Low | 04:06:13 - 04:31:24 | 2986 |
| Toppenish/White Swan | 04:18:49 | -32.1 | Dark | Down | 26.4 | 96.4 | Low | 04:06:14 - 04:31:25 | 2970 |
| Goldendale | 04:18:52 | -32.1 | Dark | Down | 26.2 | 95.8 | Low | 04:06:16 - 04:31:27 | 2951 |
| The Dalles | 04:18:53 | -31.9 | Dark | Down | 25.9 | 95.4 | Low | 04:06:18 - 04:31:29 | 2948 |
| Pasco | 04:18:49 | -33.0 | Dark | Down | 27.3 | 97.3 | Low | 04:06:13 - 04:31:24 | 2929 |
| Maupin | 04:18:55 | -32.1 | Dark | Down | 26.1 | 95.3 | Low | 04:06:19 - 04:31:30 | 2921 |
| PNWRO | 04:18:50 | -33.2 | Dark | Down | 27.5 | 97.3 | Low | 04:06:14 - 04:31:25 | 2909 |
| Sisters | 04:18:59 | -32.1 | Dark | Down | 25.8 | 94.5 | Low | 04:06:23 - 04:31:34 | 2885 |
| Redmond | 04:18:59 | -32.4 | Dark | Down | 26.1 | 94.8 | Low | 04:06:23 - 04:31:34 | 2872 |
| Bend | 04:18:59 | -32.4 | Dark | Down | 26.0 | 94.6 | Low | 04:06:24 - 04:31:35 | 2864 |
| Oregon Observatory | 04:19:00 | -32.4 | Dark | Down | 25.9 | 94.4 | Low | 04:06:25 - 04:31:36 | 2857 |
| La Pine/Gilchrist | 04:19:01 | -32.4 | Dark | Down | 25.9 | 94.3 | Low | 04:06:26 - 04:31:37 | 2847 |
| North Lake | 04:19:02 | -33.0 | Dark | Down | 26.4 | 94.5 | Low | 04:06:27 - 04:31:38 | 2805 |
| Klamath Falls | 04:19:07 | -32.7 | Dark | Down | 25.8 | 93.4 | Low | 04:06:32 - 04:31:43 | 2767 |
| Paisley | 04:19:04 | -33.4 | Dark | Down | 26.7 | 94.5 | Low | 04:06:29 - 04:31:40 | 2761 |
| Lakeview | 04:19:06 | -33.7 | Dark | Down | 26.9 | 94.3 | Low | 04:06:30 - 04:31:41 | 2725 |
| Fall River/Burney | 04:19:11 | -33.4 | Dark | Down | 26.2 | 93.1 | Low | 04:06:36 - 04:31:47 | 2683 |
| Cedarville | 04:19:09 | -34.1 | Dark | Down | 27.1 | 94.1 | Low | 04:06:33 - 04:31:44 | 2679 |
| Susanville | 04:19:13 | -34.2 | Dark | Down | 26.8 | 93.3 | Low | 04:06:38 - 04:31:49 | 2622 |
| Greenville | 04:19:15 | -34.0 | Dark | Down | 26.6 | 92.9 | Low | 04:06:39 - 04:31:50 | 2613 |
| Gimple | 04:19:15 | -34.1 | Dark | Down | 26.6 | 93.0 | Low | 04:06:39 - 04:31:50 | 2610 |
| Quincy | 04:19:15 | -34.1 | Dark | Down | 26.6 | 92.8 | Low | 04:06:40 - 04:31:51 | 2600 |
| Portola | 04:19:16 | -34.5 | Dark | Down | 27.0 | 93.1 | Low | 04:06:40 - 04:31:51 | 2578 |
| Reno | 04:19:16 | -35.1 | Dark | Down | 27.5 | 93.4 | Low | 04:06:40 - 04:31:51 | 2541 |
| Carson City | 04:19:17 | -35.2 | Dark | Down | 27.5 | 93.2 | Low | 04:06:42 - 04:31:53 | 2517 |
| Gardnerville | 04:19:18 | -35.3 | Dark | Down | 27.6 | 93.1 | Low | 04:06:43 - 04:31:54 | 2499 |
| Yerington | 04:19:17 | -35.7 | Dark | Down | 28.0 | 93.5 | Low | 04:06:41 - 04:31:52 | 2485 |
| Hawthorne | 04:19:18 | -36.3 | Dark | Down | 28.5 | 93.6 | Low | 04:06:43 - 04:31:54 | 2438 |
| Lee Vining | 04:19:21 | -36.1 | Dark | Down | 28.1 | 93.0 | Low | 04:06:45 - 04:31:56 | 2415 |
| Tonopah | 04:19:18 | -37.5 | Dark | Down | 29.6 | 94.3 | Low | 04:06:43 - 04:31:54 | 2363 |
| Bishop | 04:19:22 | -36.9 | Dark | Down | 28.7 | 93.2 | Low | 04:06:47 - 04:31:58 | 2351 |
| CPSLO | 04:19:32 | -35.8 | Dark | Down | 27.0 | 90.7 | Low | 04:06:57 - 04:32:08 | 2276 |
| Beatty | 04:19:22 | -38.2 | Dark | Down | 30.1 | 93.9 | Up | 04:06:46 - 04:31:57 | 2267 |
| Indian Springs | 04:19:21 | -39.2 | Dark | Down | 31.0 | 94.4 | Up | 04:06:46 - 04:31:57 | 2210 |
| Henderson | 04:19:22 | -39.9 | Dark | Down | 31.6 | 94.5 | Up | 04:06:47 - 04:31:58 | 2148 |
| Wildwood | 04:19:34 | -37.7 | Dark | Down | 28.7 | 91.3 | Low | 04:06:59 - 04:32:10 | 2123 |
| Niwot | 04:18:52 | -44.8 | Dark | Down | 38.4 | 104.2 | Up | 04:06:16 - 04:31:27 | 2123 |
| SwRI | 04:18:52 | -44.8 | Dark | Down | 38.4 | 104.0 | Up | 04:06:17 - 04:31:28 | 2118 |
| Searchlight/Boulder City | 04:19:24 | -40.1 | Dark | Down | 31.7 | 94.2 | Up | 04:06:49 - 04:32:00 | 2105 |
| Laughlin/Bullhead City | 04:19:25 | -40.5 | Dark | Down | 32.0 | 94.3 | Up | 04:06:49 - 04:32:00 | 2071 |
| Patrick | 04:19:23 | -41.0 | Dark | Down | 32.5 | 94.9 | Up | 04:06:47 - 04:31:58 | 2066 |
| Kingman/Dolan Springs | 04:19:24 | -40.9 | Dark | Down | 32.4 | 94.6 | Up | 04:06:49 - 04:32:00 | 2056 |
| Mohave Valley | 04:19:26 | -40.6 | Dark | Down | 32.0 | 94.1 | Up | 04:06:50 - 04:32:01 | 2051 |
| Idyllwild | 04:19:33 | -39.3 | Dark | Down | 30.3 | 92.1 | Up | 04:06:57 - 04:32:08 | 2036 |
| DCO | 04:19:23 | -41.6 | Dark | Down | 33.1 | 95.1 | Up | 04:06:47 - 04:31:58 | 2020 |
| Lake Havasu City | 04:19:27 | -40.9 | Dark | Down | 32.2 | 94.0 | Up | 04:06:51 - 04:32:02 | 2013 |
| Parker | 04:19:28 | -41.1 | Dark | Down | 32.3 | 93.8 | Up | 04:06:52 - 04:32:03 | 1985 |
| Blythe | 04:19:30 | -41.0 | Dark | Down | 32.1 | 93.3 | Up | 04:06:55 - 04:32:06 | 1956 |
| Calipatria | 04:19:34 | -40.5 | Dark | Down | 31.3 | 92.5 | Up | 04:06:58 - 04:32:09 | 1950 |
| Yuma | 04:19:33 | -41.3 | Dark | Down | 32.1 | 92.7 | Up | 04:06:58 - 04:32:09 | 1887 |
| George/Scottsdale | 04:19:25 | -43.1 | Dark | Down | 34.3 | 95.0 | Up | 04:06:50 - 04:32:01 | 1871 |
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 308460, (2025/10/16 04:17UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:29 0.8 31.57 73 6Bet Ari 01:54:38.5 +20:48:26 2.6 9.45 108 29 Ari 02:32:54.1 +15:02:05 6.0 1.97 102 PPM 118192 02:24:27.2 +15:31:29 7.9 0.86 104 PPM 118201 02:24:50.3 +14:40:08 9.7 0.01 104 308460 02:24:53.0 +14:40:31 12.2 104 Positions are for J2000
Event circumstances last updated at 2020/11/20 02:02:57 UT
Marc W. Buie, Southwest Research Institute