Event between 12UD178 and star GA1160:01748206 with event index number of 2142033
Geocentric closest approach at 2027/08/24 10:57:55 UTC
J2000 position of star is 05:57:55.2 +26:35:07
Equinox of date position of star is 05:59:17.8 +26:35:09
Stellar brightness G=15.9,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 37 degrees from the moon.
Moon is 57% illuminated.
TNO apparent brightness V=23.3
[RECON map]
TNO is 38.2 AU from the Sun
and 38.7 AU from the Earth.
The TNO is moving 19.2
km/sec on the sky relative to the star, or,
2.5 arcsec/hr.
The 1-sigma error in the time of the event is 410 seconds.
The 1-sigma cross-track error in the shadow position is
1898 km.
The sky-plane scale is
28047.9 km/arcsec.
The TNO has an absolute magnitude Hv=7.3
Diameter=204.2 km assuming a 5% albedo -- 10.6 sec chord
Diameter=83.4 km assuming a 30% albedo -- 4.3 sec chord
Dynamical classification is 5:2EEE
Star training set for 12UD178, (2027/08/24 10:42UT) Object RA Dec mag sep mel Betelgeuse 05:56:40.2 +07:24:35 0.4 19.19 41 Alnath 05:28:02.5 +28:37:42 1.6 7.29 30 139 Tau 05:59:42.6 +25:57:17 4.7 0.63 37 PPM 095183 06:00:35.7 +25:46:37 7.7 0.84 37 PPM 095137 05:59:03.0 +26:51:17 9.0 0.30 36 PPM 095168 06:00:12.6 +26:48:38 10.7 0.26 37 12UD178 05:59:38.7 +26:35:10 15.9 37 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
2.2 sigma about the mid-time.
The median site spacing is 23.0 km
RECON observability=1.0 and success probability=2.9%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Kamloops | 10:54:59 | -17.9 | AT | Up | 30.4 | 84.1 | Up | 10:39:59 - 11:09:59 | 6351 |
| Victoria | 10:54:47 | -20.9 | Dark | Up | 28.1 | 80.7 | Low | 10:39:47 - 11:09:47 | 6316 |
| Peachland | 10:54:55 | -18.3 | Dark | Up | 30.7 | 84.0 | Up | 10:39:55 - 11:09:55 | 6272 |
| Kelowna | 10:54:57 | -18.1 | Dark | Up | 30.9 | 84.3 | Up | 10:39:57 - 11:09:57 | 6270 |
| Summerland | 10:54:54 | -18.4 | Dark | Up | 30.7 | 84.0 | Up | 10:39:54 - 11:09:54 | 6260 |
| Penticton | 10:54:55 | -18.4 | Dark | Up | 30.8 | 84.0 | Up | 10:39:55 - 11:09:55 | 6252 |
| Oliver | 10:54:52 | -18.6 | Dark | Up | 30.8 | 83.8 | Up | 10:39:52 - 11:09:52 | 6229 |
| Anarchist Mountain Observatory | 10:54:53 | -18.7 | Dark | Up | 30.9 | 83.8 | Up | 10:39:53 - 11:09:53 | 6211 |
| Tonasket | 10:54:51 | -18.9 | Dark | Up | 30.8 | 83.6 | Up | 10:39:51 - 11:09:51 | 6193 |
| Okanogan | 10:54:49 | -19.2 | Dark | Up | 30.6 | 83.3 | Up | 10:39:49 - 11:09:49 | 6175 |
| Brewster | 10:54:48 | -19.5 | Dark | Up | 30.5 | 83.0 | Up | 10:39:48 - 11:09:48 | 6164 |
| Manson/Chelan | 10:54:47 | -19.8 | Dark | Up | 30.2 | 82.6 | Up | 10:39:47 - 11:09:47 | 6163 |
| Wenatchee | 10:54:44 | -20.2 | Dark | Up | 30.0 | 82.2 | Up | 10:39:44 - 11:09:44 | 6137 |
| Ellensburg | 10:54:42 | -20.6 | Dark | Up | 29.8 | 81.8 | Low | 10:39:42 - 11:09:42 | 6117 |
| Yakima | 10:54:41 | -20.9 | Dark | Up | 29.7 | 81.6 | Low | 10:39:41 - 11:09:41 | 6090 |
| Toppenish/White Swan | 10:54:40 | -21.0 | Dark | Up | 29.8 | 81.6 | Low | 10:39:40 - 11:09:40 | 6069 |
| Goldendale | 10:54:37 | -21.6 | Dark | Up | 29.4 | 81.0 | Low | 10:39:37 - 11:09:37 | 6046 |
| The Dalles | 10:54:35 | -22.0 | Dark | Up | 29.1 | 80.6 | Low | 10:39:35 - 11:09:35 | 6044 |
| Maupin | 10:54:34 | -22.2 | Dark | Up | 29.1 | 80.4 | Low | 10:39:34 - 11:09:34 | 6011 |
| PNWRO | 10:54:40 | -20.5 | Dark | Up | 30.8 | 82.4 | Up | 10:39:40 - 11:09:40 | 5990 |
| Sleaford | 10:55:23 | -10.0 | NT | Up | 39.5 | 96.5 | Up | 10:40:23 - 11:10:23 | 5989 |
| Sisters | 10:54:29 | -23.1 | Dark | Up | 28.6 | 79.6 | Low | 10:39:29 - 11:09:29 | 5968 |
| Bend | 10:54:28 | -23.1 | Dark | Up | 28.8 | 79.7 | Low | 10:39:28 - 11:09:28 | 5942 |
| Oregon Observatory | 10:54:28 | -23.3 | Dark | Up | 28.6 | 79.5 | Low | 10:39:28 - 11:09:28 | 5934 |
| North Lake | 10:54:25 | -23.5 | Dark | Up | 28.9 | 79.5 | Low | 10:39:25 - 11:09:25 | 5869 |
| Chiloquin | 10:54:22 | -24.5 | Dark | Up | 28.1 | 78.5 | Low | 10:39:22 - 11:09:22 | 5856 |
| Klamath Falls | 10:54:20 | -24.7 | Dark | Up | 28.0 | 78.4 | Low | 10:39:20 - 11:09:20 | 5828 |
| Lakeview | 10:54:21 | -23.9 | Dark | Up | 29.1 | 79.2 | Low | 10:39:21 - 11:09:21 | 5771 |
| Fall River/Burney | 10:54:15 | -25.3 | Dark | Up | 28.1 | 78.0 | Low | 10:39:15 - 11:09:15 | 5727 |
| Cedarville | 10:54:18 | -24.3 | Dark | Up | 29.1 | 79.0 | Low | 10:39:18 - 11:09:18 | 5716 |
| Susanville | 10:54:13 | -25.3 | Dark | Up | 28.5 | 78.1 | Low | 10:39:13 - 11:09:13 | 5651 |
| Greenville | 10:54:11 | -25.7 | Dark | Up | 28.2 | 77.8 | Low | 10:39:11 - 11:09:11 | 5642 |
| Gimple | 10:54:12 | -25.6 | Dark | Up | 28.3 | 77.8 | Low | 10:39:12 - 11:09:12 | 5638 |
| Quincy | 10:54:11 | -25.8 | Dark | Up | 28.2 | 77.6 | Low | 10:39:11 - 11:09:11 | 5626 |
| Portola | 10:54:11 | -25.7 | Dark | Up | 28.5 | 77.8 | Low | 10:39:11 - 11:09:11 | 5598 |
| Reno | 10:54:11 | -25.5 | Dark | Up | 28.9 | 78.1 | Low | 10:39:11 - 11:09:11 | 5552 |
| Carson City | 10:54:10 | -25.7 | Dark | Up | 28.9 | 77.9 | Low | 10:39:10 - 11:09:10 | 5524 |
| Gardnerville | 10:54:08 | -25.8 | Dark | Up | 28.8 | 77.8 | Low | 10:39:08 - 11:09:08 | 5503 |
| Yerington | 10:54:09 | -25.5 | Dark | Up | 29.3 | 78.1 | Low | 10:39:09 - 11:09:09 | 5483 |
| Hawthorne | 10:54:08 | -25.4 | Dark | Up | 29.6 | 78.1 | Low | 10:39:08 - 11:09:08 | 5426 |
| Lee Vining | 10:54:05 | -26.1 | Dark | Up | 29.1 | 77.6 | Low | 10:39:05 - 11:09:05 | 5402 |
| Tonopah | 10:54:09 | -24.9 | Dark | Up | 30.6 | 78.6 | Up | 10:39:09 - 11:09:09 | 5332 |
| Bishop | 10:54:04 | -26.1 | Dark | Up | 29.5 | 77.6 | Low | 10:39:04 - 11:09:04 | 5325 |
| Beatty | 10:54:04 | -25.3 | Dark | Up | 30.7 | 78.2 | Up | 10:39:04 - 11:09:04 | 5220 |
| Indian Springs | 10:54:04 | -24.9 | Dark | Up | 31.5 | 78.5 | Up | 10:39:04 - 11:09:04 | 5149 |
| Henderson | 10:54:04 | -24.7 | Dark | Up | 31.9 | 78.5 | Up | 10:39:04 - 11:09:04 | 5077 |
| Wildwood | 10:53:51 | -28.3 | Dark | Up | 28.6 | 75.7 | Low | 10:38:51 - 11:08:51 | 5068 |
| Dunrhomin | 10:54:37 | -15.9 | AT | Up | 40.2 | 87.0 | Up | 10:39:37 - 11:09:37 | 5039 |
| Laughlin/Bullhead City | 10:54:01 | -25.0 | Dark | Up | 32.1 | 78.2 | Up | 10:39:01 - 11:09:01 | 4987 |
| Patrick | 10:54:03 | -24.4 | Dark | Up | 32.7 | 78.7 | Up | 10:39:03 - 11:09:03 | 4978 |
| Kingman/Dolan Springs | 10:54:01 | -24.6 | Dark | Up | 32.5 | 78.5 | Up | 10:39:01 - 11:09:01 | 4967 |
| Mohave Valley | 10:54:00 | -25.2 | Dark | Up | 32.0 | 78.0 | Up | 10:39:00 - 11:09:00 | 4964 |
| Idyllwild | 10:53:52 | -27.3 | Dark | Up | 30.0 | 76.4 | Up | 10:38:52 - 11:08:52 | 4958 |
| Lake Havasu City | 10:53:59 | -25.2 | Dark | Up | 32.1 | 77.9 | Up | 10:38:59 - 11:08:59 | 4920 |
| Parker | 10:53:59 | -25.4 | Dark | Up | 32.1 | 77.7 | Up | 10:38:59 - 11:08:59 | 4889 |
| Calipatria | 10:53:52 | -26.9 | Dark | Up | 30.8 | 76.5 | Up | 10:38:52 - 11:08:52 | 4855 |
| Yuma | 10:53:52 | -26.5 | Dark | Up | 31.5 | 76.7 | Up | 10:38:52 - 11:08:52 | 4780 |
| George/Scottsdale | 10:54:00 | -24.0 | Dark | Up | 34.0 | 78.5 | Up | 10:39:00 - 11:09:00 | 4750 |
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 12UD178, (2027/08/24 10:42UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 19.19 41 Alnath 05:26:17.6 +28:36:23 1.6 7.29 30 139 Tau 05:57:59.6 +25:57:14 4.7 0.63 37 PPM 095183 05:58:52.8 +25:46:37 7.7 0.84 37 PPM 095137 05:57:19.2 +26:51:12 9.0 0.30 36 PPM 095168 05:58:28.9 +26:48:36 10.7 0.26 37 12UD178 05:57:55.2 +26:35:07 15.9 37 Positions are for J2000
Event circumstances last updated at 2022/01/28 00:28:00 UT
Marc W. Buie, Southwest Research Institute