Event between 12UR177 and star GA1220:00575475 with event index number of 1487528
Geocentric closest approach at 2025/11/06 03:37:48 UTC
J2000 position of star is 03:12:46.6 +32:38:09
Equinox of date position of star is 03:13:58.1 +32:42:25
Stellar brightness G=15.9,
use SENSEUP=128
Star is 10 degrees from the moon.
Moon is 99% illuminated.
TNO apparent brightness V=24.0
[RECON map]
TNO is 40.1 AU from the Sun
and 39.2 AU from the Earth.
The TNO is moving 24.1
km/sec on the sky relative to the star, or,
3.0 arcsec/hr.
The 1-sigma error in the time of the event is 185 seconds.
The 1-sigma cross-track error in the shadow position is
1736 km.
The sky-plane scale is
28399.6 km/arcsec.
The TNO has an absolute magnitude Hv=8.0
Diameter=154.2 km assuming a 5% albedo -- 6.4 sec chord
Diameter=62.9 km assuming a 30% albedo -- 2.6 sec chord
Dynamical classification is SCATNEAR
Star training set for 12UR177, (2025/11/06 03:38UT) Object RA Dec mag sep mel Aldebaran 04:37:24.4 +16:33:34 0.8 24.76 20 Algol 03:09:51.7 +41:03:12 2.1 8.37 18 PPM 068330 03:20:21.3 +34:18:56 5.9 2.02 11 PPM 068267 03:17:23.5 +32:57:03 6.6 0.67 10 PPM 068217 03:14:39.3 +32:59:29 9.4 0.27 10 PPM 068221 03:14:43.5 +32:32:02 11.3 0.21 10 12UR177 03:14:22.7 +32:43:53 15.9 10 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
4.9 sigma about the mid-time.
The median site spacing is 14.6 km
RECON observability=1.0 and success probability=22.1%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Kelowna | 03:39:47 | -31.2 | Dark | Up | 38.6 | 82.9 | Up | 03:24:47 - 03:54:47 | 1043 |
| Summerland | 03:39:49 | -31.1 | Dark | Up | 38.4 | 82.5 | Up | 03:24:49 - 03:54:49 | 1038 |
| Penticton | 03:39:49 | -31.1 | Dark | Up | 38.5 | 82.5 | Up | 03:24:49 - 03:54:49 | 1030 |
| Okanagan Falls | 03:39:50 | -31.2 | Dark | Up | 38.4 | 82.4 | Up | 03:24:50 - 03:54:50 | 1020 |
| Oliver | 03:39:50 | -31.2 | Dark | Up | 38.4 | 82.3 | Up | 03:24:50 - 03:54:50 | 1010 |
| Anarchist Mountain Observatory | 03:39:51 | -31.4 | Dark | Up | 38.5 | 82.3 | Up | 03:24:51 - 03:54:51 | 992 |
| Oroville | 03:39:51 | -31.4 | Dark | Up | 38.5 | 82.2 | Up | 03:24:51 - 03:54:51 | 991 |
| Tonasket | 03:39:52 | -31.4 | Dark | Up | 38.5 | 82.0 | Up | 03:24:52 - 03:54:52 | 977 |
| Okanogan | 03:39:54 | -31.4 | Dark | Up | 38.3 | 81.6 | Up | 03:24:54 - 03:54:54 | 964 |
| Manson/Chelan | 03:39:56 | -31.1 | Dark | Up | 37.9 | 80.9 | Up | 03:24:56 - 03:54:56 | 961 |
| Brewster | 03:39:55 | -31.3 | Dark | Up | 38.1 | 81.3 | Up | 03:24:55 - 03:54:55 | 957 |
| Entiat | 03:39:57 | -31.1 | Dark | Up | 37.8 | 80.7 | Up | 03:24:57 - 03:54:57 | 951 |
| Wenatchee | 03:39:58 | -31.1 | Dark | Up | 37.7 | 80.4 | Up | 03:24:58 - 03:54:58 | 941 |
| Ellensburg | 03:40:00 | -31.0 | Dark | Up | 37.5 | 80.0 | Up | 03:25:00 - 03:55:00 | 926 |
| Yakima | 03:40:01 | -31.1 | Dark | Up | 37.4 | 79.6 | Up | 03:25:01 - 03:55:01 | 903 |
| Toppenish/White Swan | 03:40:02 | -31.2 | Dark | Up | 37.5 | 79.6 | Up | 03:25:02 - 03:55:02 | 882 |
| The Dalles | 03:40:05 | -30.8 | Dark | Up | 36.8 | 78.5 | Up | 03:25:05 - 03:55:05 | 871 |
| Goldendale | 03:40:05 | -31.0 | Dark | Up | 37.1 | 78.9 | Up | 03:25:05 - 03:55:05 | 868 |
| Maupin | 03:40:07 | -31.0 | Dark | Up | 36.8 | 78.3 | Up | 03:25:07 - 03:55:07 | 841 |
| Pasco | 03:40:01 | -32.1 | Dark | Up | 38.3 | 80.3 | Up | 03:25:01 - 03:55:01 | 818 |
| Sisters | 03:40:11 | -30.7 | Dark | Up | 36.3 | 77.4 | Up | 03:25:11 - 03:55:11 | 810 |
| Madras/Culver | 03:40:09 | -31.0 | Dark | Up | 36.6 | 77.9 | Up | 03:25:09 - 03:55:09 | 810 |
| George/Umatilla | 03:40:03 | -32.0 | Dark | Up | 38.1 | 79.9 | Up | 03:25:03 - 03:55:03 | 808 |
| PNWRO | 03:40:02 | -32.3 | Dark | Up | 38.4 | 80.3 | Up | 03:25:02 - 03:55:02 | 793 |
| Redmond | 03:40:10 | -31.0 | Dark | Up | 36.5 | 77.6 | Up | 03:25:10 - 03:55:10 | 790 |
| Bend | 03:40:11 | -31.0 | Dark | Up | 36.4 | 77.4 | Up | 03:25:11 - 03:55:11 | 783 |
| Oregon Observatory | 03:40:12 | -30.9 | Dark | Up | 36.3 | 77.2 | Up | 03:25:12 - 03:55:12 | 779 |
| La Pine/Gilchrist | 03:40:13 | -30.9 | Dark | Up | 36.2 | 77.0 | Up | 03:25:13 - 03:55:13 | 769 |
| Chiloquin | 03:40:17 | -30.8 | Dark | Up | 35.7 | 76.0 | Up | 03:25:17 - 03:55:17 | 716 |
| North Lake | 03:40:14 | -31.4 | Dark | Up | 36.5 | 77.0 | Up | 03:25:14 - 03:55:14 | 713 |
| Klamath Falls | 03:40:19 | -30.9 | Dark | Up | 35.7 | 75.8 | Up | 03:25:19 - 03:55:19 | 690 |
| Paisley | 03:40:16 | -31.7 | Dark | Up | 36.7 | 76.8 | Up | 03:25:16 - 03:55:16 | 661 |
| Tulelake | 03:40:19 | -31.1 | Dark | Up | 35.8 | 75.8 | Up | 03:25:19 - 03:55:19 | 659 |
| Lakeview | 03:40:18 | -31.9 | Dark | Up | 36.7 | 76.6 | Up | 03:25:18 - 03:55:18 | 620 |
| Fall River/Burney | 03:40:23 | -31.3 | Dark | Up | 35.7 | 75.2 | Up | 03:25:23 - 03:55:23 | 596 |
| Cedarville | 03:40:20 | -32.1 | Dark | Up | 36.7 | 76.2 | Up | 03:25:20 - 03:55:20 | 569 |
| Susanville | 03:40:24 | -31.9 | Dark | Up | 36.0 | 75.1 | Up | 03:25:24 - 03:55:24 | 518 |
| Greenville | 03:40:26 | -31.7 | Dark | Up | 35.8 | 74.8 | Up | 03:25:26 - 03:55:26 | 515 |
| Gimple | 03:40:25 | -31.8 | Dark | Up | 35.8 | 74.8 | Up | 03:25:25 - 03:55:25 | 510 |
| Quincy | 03:40:26 | -31.7 | Dark | Up | 35.7 | 74.7 | Up | 03:25:26 - 03:55:26 | 501 |
| Portola | 03:40:26 | -32.1 | Dark | Up | 36.0 | 74.8 | Up | 03:25:26 - 03:55:26 | 469 |
| Reno | 03:40:27 | -32.7 | Dark | Up | 36.4 | 75.0 | Up | 03:25:27 - 03:55:27 | 419 |
| Carson City | 03:40:28 | -32.7 | Dark | Up | 36.4 | 74.7 | Up | 03:25:28 - 03:55:28 | 393 |
| Gardnerville | 03:40:29 | -32.8 | Dark | Up | 36.3 | 74.6 | Up | 03:25:29 - 03:55:29 | 374 |
| Yerington | 03:40:28 | -33.2 | Dark | Up | 36.8 | 74.9 | Up | 03:25:28 - 03:55:28 | 348 |
| Hawthorne | 03:40:29 | -33.7 | Dark | Up | 37.1 | 74.8 | Up | 03:25:29 - 03:55:29 | 289 |
| Lee Vining | 03:40:31 | -33.4 | Dark | Up | 36.6 | 74.2 | Up | 03:25:31 - 03:55:31 | 275 |
| Bishop | 03:40:33 | -34.0 | Dark | Up | 37.0 | 74.1 | Up | 03:25:33 - 03:55:33 | 195 |
| Tonopah | 03:40:29 | -34.8 | Dark | Up | 38.0 | 75.1 | Up | 03:25:29 - 03:55:29 | 185 |
| CPSLO | 03:40:42 | -32.4 | Dark | Up | 34.6 | 71.7 | Up | 03:25:42 - 03:55:42 | 166 |
| Lone Pine | 03:40:35 | -34.3 | Dark | Up | 37.0 | 73.7 | Up | 03:25:35 - 03:55:35 | 124 |
| Beatty | 03:40:33 | -35.3 | Dark | Up | 38.1 | 74.4 | Up | 03:25:33 - 03:55:33 | 78 |
| Indian Springs | 03:40:32 | -36.2 | Dark | Up | 38.8 | 74.6 | Up | 03:25:32 - 03:55:32 | -2 |
| Wildwood | 03:40:44 | -34.1 | Dark | Up | 35.9 | 71.7 | Up | 03:25:44 - 03:55:44 | -31 |
| Henderson | 03:40:33 | -36.9 | Dark | Up | 39.2 | 74.5 | Up | 03:25:33 - 03:55:33 | -78 |
| Searchlight/Boulder City | 03:40:35 | -37.0 | Dark | Up | 39.1 | 74.1 | Up | 03:25:35 - 03:55:35 | -124 |
| Idyllwild | 03:40:43 | -35.7 | Dark | Up | 37.2 | 72.1 | Up | 03:25:43 - 03:55:43 | -159 |
| Laughlin/Bullhead City | 03:40:36 | -37.3 | Dark | Up | 39.3 | 74.0 | Up | 03:25:36 - 03:55:36 | -165 |
| Patrick | 03:40:34 | -37.8 | Dark | Up | 39.9 | 74.5 | Up | 03:25:34 - 03:55:34 | -183 |
| Mohave Valley | 03:40:37 | -37.3 | Dark | Up | 39.3 | 73.8 | Up | 03:25:37 - 03:55:37 | -186 |
| Kingman/Dolan Springs | 03:40:35 | -37.7 | Dark | Up | 39.7 | 74.2 | Up | 03:25:35 - 03:55:35 | -190 |
| Lake Havasu City | 03:40:38 | -37.6 | Dark | Up | 39.3 | 73.6 | Up | 03:25:38 - 03:55:38 | -229 |
| DCO | 03:40:34 | -38.5 | Dark | Up | 40.4 | 74.5 | Up | 03:25:34 - 03:55:34 | -244 |
| Parker | 03:40:39 | -37.7 | Dark | Up | 39.3 | 73.3 | Up | 03:25:39 - 03:55:39 | -258 |
| Niwot | 03:40:06 | -43.5 | Dark | Up | 47.5 | 82.9 | Up | 03:25:06 - 03:55:06 | -262 |
| SwRI | 03:40:06 | -43.4 | Dark | Up | 47.4 | 82.7 | Up | 03:25:06 - 03:55:06 | -265 |
| Calipatria | 03:40:43 | -36.7 | Dark | Up | 38.0 | 72.1 | Up | 03:25:43 - 03:55:43 | -270 |
| Blythe | 03:40:41 | -37.5 | Dark | Up | 38.9 | 72.8 | Up | 03:25:41 - 03:55:41 | -282 |
| Yuma | 03:40:43 | -37.5 | Dark | Up | 38.6 | 72.1 | Up | 03:25:43 - 03:55:43 | -352 |
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 12UR177, (2025/11/06 03:38UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:30 0.8 24.76 20 Algol 03:08:10.1 +40:57:20 2.1 8.37 18 PPM 068330 03:18:43.9 +34:13:22 5.9 2.02 11 PPM 068267 03:15:47.1 +32:51:25 6.6 0.67 10 PPM 068217 03:13:03.1 +32:53:46 9.4 0.27 10 PPM 068221 03:13:07.6 +32:26:19 11.3 0.21 10 12UR177 03:12:46.6 +32:38:09 15.9 10 Positions are for J2000
Event circumstances last updated at 2019/03/25 00:35:11 UT
Marc W. Buie, Southwest Research Institute