Event between 12UN177 and star GA1280:00808778 with event index number of 2307204
Geocentric closest approach at 2024/10/31 04:11:15 UTC
J2000 position of star is 03:09:31.7 +38:21:15
Equinox of date position of star is 03:10:55.9 +38:26:10
Stellar brightness G=15.4,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 144 degrees from the moon.
Moon is 2% illuminated.
TNO apparent brightness V=23.1
[RECON map]
TNO is 36.3 AU from the Sun
and 35.5 AU from the Earth.
The TNO is moving 23.7
km/sec on the sky relative to the star, or,
3.3 arcsec/hr.
The 1-sigma error in the time of the event is 178 seconds.
The 1-sigma cross-track error in the shadow position is
2209 km.
The sky-plane scale is
25716.6 km/arcsec.
The TNO has an absolute magnitude Hv=7.5
Diameter=186.2 km assuming a 5% albedo -- 8.2 sec chord
Diameter=76.0 km assuming a 30% albedo -- 3.3 sec chord
Dynamical classification is SCATEXTD
Star training set for 12UN177, (2024/10/31 04:07UT) Object RA Dec mag sep mel Aldebaran 04:37:20.9 +16:33:26 0.8 28.91 133 Algol 03:09:47.7 +41:02:58 2.1 2.61 142 25Rho Per 03:06:46.6 +38:56:05 3.3 0.98 144 PPM 068165 03:11:42.1 +38:26:18 7.5 0.11 143 PPM 068148 03:10:50.7 +38:32:16 9.1 0.11 144 12UN177 03:11:07.5 +38:26:51 15.4 143 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 21.4 km
RECON observability=1.0 and success probability=11.9%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Victoria | 04:13:45 | -33.0 | Dark | Down | 41.6 | 75.6 | Up | 03:58:45 - 04:28:45 | 4338 |
| Clarence Fulton | 04:13:35 | -34.9 | Dark | Down | 44.6 | 79.8 | Up | 03:58:35 - 04:28:35 | 4270 |
| Peachland | 04:13:36 | -34.8 | Dark | Down | 44.2 | 79.0 | Up | 03:58:36 - 04:28:36 | 4256 |
| Kelowna | 04:13:36 | -35.0 | Dark | Down | 44.4 | 79.3 | Up | 03:58:36 - 04:28:36 | 4251 |
| Summerland | 04:13:36 | -34.9 | Dark | Down | 44.3 | 78.9 | Up | 03:58:36 - 04:28:36 | 4242 |
| Penticton | 04:13:36 | -35.0 | Dark | Down | 44.3 | 78.9 | Up | 03:58:36 - 04:28:36 | 4232 |
| Oliver | 04:13:38 | -35.2 | Dark | Down | 44.2 | 78.6 | Up | 03:58:38 - 04:28:38 | 4208 |
| Anarchist Mountain Observatory | 04:13:38 | -35.3 | Dark | Down | 44.3 | 78.6 | Up | 03:58:38 - 04:28:38 | 4188 |
| Tonasket | 04:13:39 | -35.4 | Dark | Down | 44.2 | 78.2 | Up | 03:58:39 - 04:28:39 | 4169 |
| Okanogan | 04:13:42 | -35.4 | Dark | Down | 44.1 | 77.8 | Up | 03:58:42 - 04:28:42 | 4152 |
| Manson/Chelan | 04:13:43 | -35.3 | Dark | Down | 43.6 | 77.0 | Up | 03:58:43 - 04:28:43 | 4145 |
| Brewster | 04:13:42 | -35.4 | Dark | Down | 43.9 | 77.4 | Up | 03:58:42 - 04:28:42 | 4143 |
| Wenatchee | 04:13:45 | -35.3 | Dark | Down | 43.4 | 76.5 | Up | 03:58:45 - 04:28:45 | 4120 |
| Ellensburg | 04:13:47 | -35.3 | Dark | Down | 43.1 | 76.0 | Up | 03:58:47 - 04:28:47 | 4101 |
| Yakima | 04:13:48 | -35.4 | Dark | Down | 43.0 | 75.6 | Up | 03:58:48 - 04:28:48 | 4073 |
| Toppenish/White Swan | 04:13:49 | -35.6 | Dark | Down | 43.1 | 75.5 | Up | 03:58:49 - 04:28:49 | 4050 |
| The Dalles | 04:13:53 | -35.3 | Dark | Down | 42.4 | 74.4 | Up | 03:58:53 - 04:28:53 | 4032 |
| Goldendale | 04:13:52 | -35.5 | Dark | Down | 42.7 | 74.8 | Up | 03:58:52 - 04:28:52 | 4031 |
| Maupin | 04:13:54 | -35.5 | Dark | Down | 42.3 | 74.1 | Up | 03:58:54 - 04:28:54 | 3997 |
| Pasco | 04:13:49 | -36.5 | Dark | Down | 43.9 | 76.1 | Up | 03:58:49 - 04:28:49 | 3981 |
| Sisters | 04:13:57 | -35.4 | Dark | Down | 41.8 | 73.1 | Up | 03:58:57 - 04:28:57 | 3959 |
| PNWRO | 04:13:48 | -36.7 | Dark | Down | 44.0 | 76.0 | Up | 03:58:48 - 04:28:48 | 3952 |
| Redmond | 04:13:57 | -35.7 | Dark | Down | 42.0 | 73.3 | Up | 03:58:57 - 04:28:57 | 3937 |
| Bend | 04:13:58 | -35.7 | Dark | Down | 41.9 | 73.0 | Up | 03:58:58 - 04:28:58 | 3929 |
| Oregon Observatory | 04:13:59 | -35.6 | Dark | Down | 41.7 | 72.8 | Up | 03:58:59 - 04:28:59 | 3923 |
| La Pine/Gilchrist | 04:14:00 | -35.7 | Dark | Down | 41.6 | 72.6 | Up | 03:59:00 - 04:29:00 | 3911 |
| North Lake | 04:14:01 | -36.2 | Dark | Down | 41.9 | 72.5 | Up | 03:59:01 - 04:29:01 | 3849 |
| Chiloquin | 04:14:04 | -35.7 | Dark | Down | 41.1 | 71.5 | Up | 03:59:04 - 04:29:04 | 3848 |
| Klamath Falls | 04:14:05 | -35.9 | Dark | Down | 41.0 | 71.3 | Up | 03:59:05 - 04:29:05 | 3818 |
| Paisley | 04:14:02 | -36.6 | Dark | Down | 42.0 | 72.2 | Up | 03:59:02 - 04:29:02 | 3790 |
| Lakeview | 04:14:03 | -36.9 | Dark | Down | 42.0 | 71.9 | Up | 03:59:03 - 04:29:03 | 3743 |
| Fall River/Burney | 04:14:08 | -36.4 | Dark | Down | 40.9 | 70.5 | Up | 03:59:08 - 04:29:08 | 3711 |
| Cedarville | 04:14:05 | -37.2 | Dark | Down | 41.9 | 71.4 | Up | 03:59:05 - 04:29:05 | 3685 |
| Susanville | 04:14:09 | -37.1 | Dark | Down | 41.2 | 70.3 | Up | 03:59:09 - 04:29:09 | 3625 |
| Greenville | 04:14:11 | -37.0 | Dark | Down | 40.9 | 69.9 | Up | 03:59:11 - 04:29:11 | 3620 |
| Gimple | 04:14:11 | -37.0 | Dark | Down | 41.0 | 70.0 | Up | 03:59:11 - 04:29:11 | 3615 |
| Quincy | 04:14:11 | -37.0 | Dark | Down | 40.9 | 69.8 | Up | 03:59:11 - 04:29:11 | 3604 |
| Portola | 04:14:11 | -37.4 | Dark | Down | 41.2 | 69.9 | Up | 03:59:11 - 04:29:11 | 3570 |
| Reno | 04:14:11 | -38.0 | Dark | Down | 41.5 | 69.9 | Up | 03:59:11 - 04:29:11 | 3515 |
| Carson City | 04:14:12 | -38.1 | Dark | Down | 41.4 | 69.6 | Up | 03:59:12 - 04:29:12 | 3486 |
| Gardnerville | 04:14:13 | -38.2 | Dark | Down | 41.4 | 69.4 | Up | 03:59:13 - 04:29:13 | 3465 |
| Yerington | 04:14:12 | -38.6 | Dark | Down | 41.8 | 69.7 | Up | 03:59:12 - 04:29:12 | 3437 |
| Hawthorne | 04:14:13 | -39.1 | Dark | Down | 42.1 | 69.5 | Up | 03:59:13 - 04:29:13 | 3373 |
| Lee Vining | 04:14:15 | -38.9 | Dark | Down | 41.5 | 68.9 | Up | 03:59:15 - 04:29:15 | 3355 |
| Bishop | 04:14:16 | -39.6 | Dark | Down | 41.8 | 68.6 | Up | 03:59:16 - 04:29:16 | 3268 |
| Tonopah | 04:14:12 | -40.3 | Dark | Down | 42.9 | 69.6 | Up | 03:59:12 - 04:29:12 | 3260 |
| CPSLO | 04:14:25 | -38.2 | Dark | Down | 39.4 | 66.3 | Up | 03:59:25 - 04:29:25 | 3228 |
| Beatty | 04:14:15 | -40.9 | Dark | Down | 42.9 | 68.8 | Up | 03:59:15 - 04:29:15 | 3143 |
| Indian Springs | 04:14:14 | -41.9 | Dark | Down | 43.6 | 68.9 | Up | 03:59:14 - 04:29:14 | 3058 |
| Wildwood | 04:14:26 | -40.1 | Dark | Down | 40.4 | 65.9 | Up | 03:59:26 - 04:29:26 | 3015 |
| Henderson | 04:14:14 | -42.5 | Dark | Down | 43.9 | 68.6 | Up | 03:59:14 - 04:29:14 | 2976 |
| Laughlin/Bullhead City | 04:14:16 | -43.1 | Dark | Down | 43.9 | 67.9 | Up | 03:59:16 - 04:29:16 | 2881 |
| Idyllwild | 04:14:24 | -41.7 | Dark | Down | 41.7 | 66.2 | Up | 03:59:24 - 04:29:24 | 2880 |
| Patrick | 04:14:14 | -43.6 | Dark | Down | 44.5 | 68.4 | Up | 03:59:14 - 04:29:14 | 2864 |
| Mohave Valley | 04:14:17 | -43.2 | Dark | Down | 43.8 | 67.7 | Up | 03:59:17 - 04:29:17 | 2858 |
| Kingman/Dolan Springs | 04:14:15 | -43.5 | Dark | Down | 44.3 | 68.1 | Up | 03:59:15 - 04:29:15 | 2855 |
| Dunrhomin | 04:13:44 | -48.2 | Dark | Down | 52.4 | 76.5 | Up | 03:58:44 - 04:28:44 | 2837 |
| Lake Havasu City | 04:14:18 | -43.5 | Dark | Down | 43.8 | 67.4 | Up | 03:59:18 - 04:29:18 | 2811 |
| Parker | 04:14:19 | -43.6 | Dark | Down | 43.7 | 67.1 | Up | 03:59:19 - 04:29:19 | 2780 |
| Calipatria | 04:14:24 | -42.8 | Dark | Down | 42.4 | 65.9 | Up | 03:59:24 - 04:29:24 | 2763 |
| Blythe | 04:14:20 | -43.5 | Dark | Down | 43.3 | 66.6 | Up | 03:59:20 - 04:29:20 | 2752 |
| Yuma | 04:14:23 | -43.6 | Dark | Down | 42.9 | 65.8 | Up | 03:59:23 - 04:29:23 | 2676 |
| George/Scottsdale | 04:14:15 | -45.6 | Dark | Down | 45.4 | 67.3 | Up | 03:59:15 - 04:29:15 | 2611 |
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 12UN177, (2024/10/31 04:07UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:29 0.8 28.91 133 Algol 03:08:10.1 +40:57:20 2.1 2.61 142 25Rho Per 03:05:10.8 +38:50:23 3.3 0.98 144 PPM 068165 03:10:06.3 +38:20:44 7.5 0.11 143 PPM 068148 03:09:14.9 +38:26:40 9.1 0.11 144 12UN177 03:09:31.7 +38:21:15 15.4 144 Positions are for J2000
Event circumstances last updated at 2021/10/30 23:08:47 UT
Marc W. Buie, Southwest Research Institute