Event between 10TT191 and star GA1120:01186763 with event index number of 1496951
Geocentric closest approach at 2025/12/17 02:48:38 UTC
J2000 position of star is 05:27:22.2 +22:12:50
Equinox of date position of star is 05:28:36.5 +22:13:47
Stellar brightness G=11.1,
use SENSEUP=8
Star is 150 degrees from the moon.
Moon is 8% illuminated.
TNO apparent brightness V=25.0
[RECON map]
TNO is 32.2 AU from the Sun
and 31.2 AU from the Earth.
The TNO is moving 25.2
km/sec on the sky relative to the star, or,
4.0 arcsec/hr.
The 1-sigma error in the time of the event is 1685 seconds.
The 1-sigma cross-track error in the shadow position is
1263 km.
The sky-plane scale is
22639.2 km/arcsec.
The TNO has an absolute magnitude Hv=10.0
Diameter=164.4 km assuming a 5% albedo -- 2.4 sec chord
Diameter=67.1 km assuming a 30% albedo -- 1.0 sec chord
Dynamical classification is 1:1
Star training set for 10TT191, (2025/12/17 02:49UT) Object RA Dec mag sep mel Aldebaran 04:37:24.8 +16:33:35 0.8 13.40 161 Alnath 05:27:56.1 +28:37:37 1.6 6.40 151 114 Tau 05:29:11.7 +21:57:25 4.7 0.28 150 PPM 094392 05:29:59.9 +22:45:42 8.1 0.58 150 PPM 094372 05:28:35.3 +22:24:45 9.9 0.20 150 10TT191 05:28:56.0 +22:14:02 11.1 150 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
0.5 sigma about the mid-time.
The median site spacing is 17.3 km
RECON observability=1.0 and success probability=33.1%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Clarence Fulton | 02:51:03 | -26.8 | Dark | Down | 28.0 | 88.3 | Low | 02:36:03 - 03:06:03 | 1253 |
| Victoria | 02:51:11 | -24.0 | Dark | Down | 25.3 | 84.4 | Low | 02:36:11 - 03:06:11 | 1246 |
| Peachland | 02:51:05 | -26.5 | Dark | Down | 27.7 | 87.7 | Low | 02:36:05 - 03:06:05 | 1231 |
| Kelowna | 02:51:04 | -26.7 | Dark | Down | 27.9 | 88.0 | Low | 02:36:04 - 03:06:04 | 1230 |
| Summerland | 02:51:05 | -26.5 | Dark | Down | 27.8 | 87.7 | Low | 02:36:05 - 03:06:05 | 1218 |
| Penticton | 02:51:05 | -26.6 | Dark | Down | 27.8 | 87.7 | Low | 02:36:05 - 03:06:05 | 1210 |
| Oliver | 02:51:06 | -26.6 | Dark | Down | 27.8 | 87.5 | Low | 02:36:06 - 03:06:06 | 1185 |
| Anarchist Mountain Observatory | 02:51:07 | -26.7 | Dark | Down | 27.9 | 87.6 | Low | 02:36:07 - 03:06:07 | 1167 |
| Tonasket | 02:51:08 | -26.6 | Dark | Down | 27.9 | 87.4 | Low | 02:36:08 - 03:06:08 | 1147 |
| Okanogan | 02:51:09 | -26.5 | Dark | Down | 27.8 | 87.1 | Low | 02:36:09 - 03:06:09 | 1127 |
| Brewster | 02:51:10 | -26.3 | Dark | Down | 27.6 | 86.8 | Low | 02:36:10 - 03:06:10 | 1113 |
| Manson/Chelan | 02:51:11 | -26.1 | Dark | Down | 27.4 | 86.4 | Low | 02:36:11 - 03:06:11 | 1108 |
| Entiat | 02:51:12 | -26.0 | Dark | Down | 27.3 | 86.3 | Low | 02:36:12 - 03:06:12 | 1094 |
| Wenatchee | 02:51:13 | -25.9 | Dark | Down | 27.2 | 86.1 | Low | 02:36:13 - 03:06:13 | 1078 |
| Ellensburg | 02:51:14 | -25.7 | Dark | Down | 27.1 | 85.7 | Low | 02:36:14 - 03:06:14 | 1054 |
| Yakima | 02:51:16 | -25.6 | Dark | Down | 27.0 | 85.5 | Low | 02:36:16 - 03:06:16 | 1025 |
| Toppenish/White Swan | 02:51:16 | -25.7 | Dark | Down | 27.1 | 85.5 | Low | 02:36:16 - 03:06:16 | 1004 |
| Goldendale | 02:51:18 | -25.4 | Dark | Down | 26.8 | 84.9 | Low | 02:36:18 - 03:06:18 | 975 |
| The Dalles | 02:51:19 | -25.1 | Dark | Down | 26.5 | 84.6 | Low | 02:36:19 - 03:06:19 | 969 |
| Pasco | 02:51:16 | -26.6 | Dark | Down | 28.0 | 86.3 | Low | 02:36:16 - 03:06:16 | 957 |
| Maupin | 02:51:21 | -25.1 | Dark | Down | 26.6 | 84.4 | Low | 02:36:21 - 03:06:21 | 934 |
| PNWRO | 02:51:16 | -26.7 | Dark | Down | 28.1 | 86.4 | Low | 02:36:16 - 03:06:16 | 932 |
| Sisters | 02:51:24 | -24.6 | Dark | Down | 26.1 | 83.7 | Low | 02:36:24 - 03:06:24 | 882 |
| Redmond | 02:51:24 | -24.9 | Dark | Down | 26.4 | 83.9 | Low | 02:36:24 - 03:06:24 | 868 |
| Bend | 02:51:24 | -24.8 | Dark | Down | 26.3 | 83.7 | Low | 02:36:24 - 03:06:24 | 856 |
| Oregon Observatory | 02:51:25 | -24.6 | Dark | Down | 26.2 | 83.6 | Low | 02:36:25 - 03:06:25 | 847 |
| La Pine/Gilchrist | 02:51:26 | -24.6 | Dark | Down | 26.1 | 83.4 | Low | 02:36:26 - 03:06:26 | 833 |
| North Lake | 02:51:27 | -24.9 | Dark | Down | 26.5 | 83.6 | Low | 02:36:27 - 03:06:27 | 781 |
| Klamath Falls | 02:51:30 | -24.1 | Dark | Down | 25.7 | 82.6 | Low | 02:36:30 - 03:06:30 | 728 |
| Paisley | 02:51:28 | -25.1 | Dark | Down | 26.7 | 83.6 | Low | 02:36:28 - 03:06:28 | 726 |
| Lakeview | 02:51:29 | -25.2 | Dark | Down | 26.8 | 83.5 | Low | 02:36:29 - 03:06:29 | 680 |
| Fall River/Burney | 02:51:34 | -24.2 | Dark | Down | 25.9 | 82.3 | Low | 02:36:34 - 03:06:34 | 622 |
| Cedarville | 02:51:31 | -25.2 | Dark | Down | 26.8 | 83.2 | Low | 02:36:31 - 03:06:31 | 622 |
| Susanville | 02:51:35 | -24.7 | Dark | Down | 26.4 | 82.4 | Low | 02:36:35 - 03:06:35 | 548 |
| Greenville | 02:51:36 | -24.4 | Dark | Down | 26.1 | 82.1 | Low | 02:36:36 - 03:06:36 | 535 |
| Gimple | 02:51:36 | -24.4 | Dark | Down | 26.2 | 82.1 | Low | 02:36:36 - 03:06:36 | 532 |
| Quincy | 02:51:37 | -24.3 | Dark | Down | 26.1 | 82.0 | Low | 02:36:37 - 03:06:37 | 518 |
| Portola | 02:51:37 | -24.7 | Dark | Down | 26.4 | 82.2 | Low | 02:36:37 - 03:06:37 | 492 |
| Reno | 02:51:37 | -25.1 | Dark | Down | 26.9 | 82.5 | Low | 02:36:37 - 03:06:37 | 449 |
| Carson City | 02:51:38 | -25.1 | Dark | Down | 26.9 | 82.3 | Low | 02:36:38 - 03:06:38 | 419 |
| Gardnerville | 02:51:39 | -25.1 | Dark | Down | 26.9 | 82.2 | Low | 02:36:39 - 03:06:39 | 397 |
| Yerington | 02:51:38 | -25.5 | Dark | Down | 27.3 | 82.6 | Low | 02:36:38 - 03:06:38 | 382 |
| Hawthorne | 02:51:38 | -25.9 | Dark | Down | 27.7 | 82.6 | Low | 02:36:38 - 03:06:38 | 325 |
| Lee Vining | 02:51:41 | -25.4 | Dark | Down | 27.2 | 82.1 | Low | 02:36:41 - 03:06:41 | 294 |
| Tonopah | 02:51:38 | -26.9 | Dark | Down | 28.7 | 83.2 | Low | 02:36:38 - 03:06:38 | 239 |
| Bishop | 02:51:42 | -25.8 | Dark | Down | 27.7 | 82.2 | Low | 02:36:42 - 03:06:42 | 218 |
| Beatty | 02:51:41 | -27.0 | Dark | Down | 28.9 | 82.8 | Low | 02:36:41 - 03:06:41 | 124 |
| CPSLO | 02:51:49 | -23.7 | Dark | Down | 25.6 | 80.0 | Low | 02:36:49 - 03:06:49 | 118 |
| Indian Springs | 02:51:41 | -27.8 | Dark | Down | 29.8 | 83.2 | Low | 02:36:41 - 03:06:41 | 59 |
| Niwot | 02:51:16 | -36.3 | Dark | Down | 38.1 | 91.8 | Up | 02:36:16 - 03:06:16 | 35 |
| SwRI | 02:51:17 | -36.2 | Dark | Down | 38.0 | 91.7 | Up | 02:36:17 - 03:06:17 | 28 |
| Henderson | 02:51:41 | -28.3 | Dark | Down | 30.3 | 83.3 | Up | 02:36:41 - 03:06:41 | -12 |
| Wildwood | 02:51:50 | -25.1 | Dark | Down | 27.1 | 80.4 | Low | 02:36:50 - 03:06:50 | -60 |
| Searchlight/Boulder City | 02:51:43 | -28.3 | Dark | Down | 30.2 | 83.0 | Up | 02:36:43 - 03:06:43 | -64 |
| Laughlin/Bullhead City | 02:51:43 | -28.5 | Dark | Down | 30.5 | 83.0 | Up | 02:36:43 - 03:06:43 | -103 |
| Patrick | 02:51:41 | -29.1 | Dark | Down | 31.1 | 83.5 | Up | 02:36:41 - 03:06:41 | -105 |
| Kingman/Dolan Springs | 02:51:42 | -28.9 | Dark | Down | 30.9 | 83.3 | Up | 02:36:42 - 03:06:42 | -118 |
| Mohave Valley | 02:51:44 | -28.5 | Dark | Down | 30.5 | 82.9 | Up | 02:36:44 - 03:06:44 | -128 |
| DCO | 02:51:41 | -29.6 | Dark | Down | 31.6 | 83.7 | Up | 02:36:41 - 03:06:41 | -156 |
| Idyllwild | 02:51:49 | -26.5 | Dark | Down | 28.6 | 81.1 | Low | 02:36:49 - 03:06:49 | -157 |
| Lake Havasu City | 02:51:44 | -28.6 | Dark | Down | 30.6 | 82.7 | Up | 02:36:44 - 03:06:44 | -172 |
| Parker | 02:51:45 | -28.6 | Dark | Down | 30.6 | 82.6 | Up | 02:36:45 - 03:06:45 | -205 |
| Blythe | 02:51:47 | -28.2 | Dark | Down | 30.3 | 82.1 | Up | 02:36:47 - 03:06:47 | -242 |
| Calipatria | 02:51:49 | -27.4 | Dark | Down | 29.5 | 81.4 | Low | 02:36:49 - 03:06:49 | -254 |
| Yuma | 02:51:49 | -28.0 | Dark | Down | 30.1 | 81.6 | Up | 02:36:49 - 03:06:49 | -325 |
| George/Scottsdale | 02:51:43 | -30.5 | Dark | Down | 32.6 | 83.5 | Up | 02:36:43 - 03:06:43 | -327 |
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 10TT191, (2025/12/17 02:49UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:29 0.8 13.40 161 Alnath 05:26:17.5 +28:36:23 1.6 6.40 151 114 Tau 05:27:38.1 +21:56:13 4.7 0.28 150 PPM 094392 05:28:25.7 +22:44:33 8.1 0.58 150 PPM 094372 05:27:01.3 +22:23:32 9.9 0.20 150 10TT191 05:27:22.2 +22:12:50 11.1 150 Positions are for J2000
Event circumstances last updated at 2020/07/21 21:08:22 UT
Marc W. Buie, Southwest Research Institute