Event between 03UN284 and star GA1140:01306348 with event index number of 1637622
Geocentric closest approach at 2026/12/03 05:28:01 UTC
J2000 position of star is 05:35:18.4 +25:39:31
Equinox of date position of star is 05:36:40.3 +25:40:17
Stellar brightness G=15.3,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 101 degrees from the moon.
Moon is 30% illuminated.
TNO apparent brightness V=23.7
[RECON map]
TNO is 42.5 AU from the Sun
and 41.6 AU from the Earth.
The TNO is moving 24.8
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 609 seconds.
The 1-sigma cross-track error in the shadow position is
3664 km.
The sky-plane scale is
30155.0 km/arcsec.
The TNO has an absolute magnitude Hv=7.4
Diameter=195.9 km assuming a 5% albedo -- 7.9 sec chord
Diameter=80.0 km assuming a 30% albedo -- 3.2 sec chord
Dynamical classification is CLASSICAL
Star training set for 03UN284, (2026/12/03 05:28UT) Object RA Dec mag sep mel Aldebaran 04:37:28.1 +16:33:41 0.8 16.58 115 Alnath 05:27:59.8 +28:37:40 1.6 3.57 103 125 Tau 05:41:24.4 +25:54:35 5.2 1.03 100 PPM 094544 05:37:43.2 +26:17:00 8.3 0.63 101 PPM 094532 05:37:14.9 +25:53:10 9.9 0.22 101 03UN284 05:36:58.4 +25:40:27 15.3 100 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
1.5 sigma about the mid-time.
The median site spacing is 29.0 km
RECON observability=1.0 and success probability=1.9%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Kamloops | 05:30:05 | -50.4 | Dark | Down | 44.8 | 104.5 | Up | 05:15:05 - 05:45:05 | 11417 |
| Kelowna | 05:30:06 | -51.3 | Dark | Down | 45.6 | 104.5 | Up | 05:15:06 - 05:45:06 | 11324 |
| Peachland | 05:30:06 | -51.2 | Dark | Down | 45.4 | 104.2 | Up | 05:15:06 - 05:45:06 | 11322 |
| Victoria | 05:30:16 | -49.8 | Dark | Down | 43.4 | 99.8 | Up | 05:15:16 - 05:45:16 | 11308 |
| Summerland | 05:30:06 | -51.4 | Dark | Down | 45.5 | 104.1 | Up | 05:15:06 - 05:45:06 | 11307 |
| Penticton | 05:30:07 | -51.5 | Dark | Down | 45.6 | 104.1 | Up | 05:15:07 - 05:45:07 | 11298 |
| Oliver | 05:30:08 | -51.6 | Dark | Down | 45.7 | 103.8 | Up | 05:15:08 - 05:45:08 | 11267 |
| Anarchist Mountain Observatory | 05:30:08 | -51.8 | Dark | Down | 45.9 | 103.8 | Up | 05:15:08 - 05:45:08 | 11247 |
| Sleaford | 05:29:32 | -55.9 | Dark | Down | 52.5 | 121.1 | Up | 05:14:32 - 05:44:32 | 11234 |
| Tonasket | 05:30:09 | -52.0 | Dark | Down | 45.9 | 103.4 | Up | 05:15:09 - 05:45:09 | 11221 |
| Okanogan | 05:30:10 | -52.1 | Dark | Down | 45.9 | 103.0 | Up | 05:15:10 - 05:45:10 | 11195 |
| Brewster | 05:30:11 | -52.1 | Dark | Down | 45.8 | 102.5 | Up | 05:15:11 - 05:45:11 | 11176 |
| Manson/Chelan | 05:30:13 | -52.0 | Dark | Down | 45.6 | 102.0 | Up | 05:15:13 - 05:45:13 | 11167 |
| Wenatchee | 05:30:14 | -52.1 | Dark | Down | 45.6 | 101.4 | Up | 05:15:14 - 05:45:14 | 11129 |
| Ellensburg | 05:30:15 | -52.2 | Dark | Down | 45.6 | 100.7 | Up | 05:15:15 - 05:45:15 | 11098 |
| Yakima | 05:30:17 | -52.4 | Dark | Down | 45.6 | 100.3 | Up | 05:15:17 - 05:45:17 | 11062 |
| Toppenish/White Swan | 05:30:17 | -52.6 | Dark | Down | 45.8 | 100.3 | Up | 05:15:17 - 05:45:17 | 11038 |
| Goldendale | 05:30:19 | -52.6 | Dark | Down | 45.6 | 99.4 | Up | 05:15:19 - 05:45:19 | 10999 |
| The Dalles | 05:30:20 | -52.5 | Dark | Down | 45.4 | 98.8 | Up | 05:15:20 - 05:45:20 | 10988 |
| PNWRO | 05:30:15 | -53.7 | Dark | Down | 46.9 | 101.2 | Up | 05:15:15 - 05:45:15 | 10965 |
| Maupin | 05:30:21 | -52.7 | Dark | Down | 45.5 | 98.5 | Up | 05:15:21 - 05:45:21 | 10947 |
| Sisters | 05:30:24 | -52.8 | Dark | Down | 45.3 | 97.2 | Up | 05:15:24 - 05:45:24 | 10881 |
| Bend | 05:30:24 | -53.1 | Dark | Down | 45.5 | 97.2 | Up | 05:15:24 - 05:45:24 | 10852 |
| Oregon Observatory | 05:30:25 | -53.1 | Dark | Down | 45.4 | 96.9 | Up | 05:15:25 - 05:45:25 | 10839 |
| North Lake | 05:30:26 | -53.7 | Dark | Down | 45.9 | 96.7 | Up | 05:15:26 - 05:45:26 | 10765 |
| Chiloquin | 05:30:29 | -53.3 | Dark | Down | 45.3 | 95.3 | Up | 05:15:29 - 05:45:29 | 10729 |
| Klamath Falls | 05:30:30 | -53.5 | Dark | Down | 45.4 | 95.0 | Up | 05:15:30 - 05:45:30 | 10695 |
| Lakeview | 05:30:27 | -54.5 | Dark | Down | 46.4 | 96.0 | Up | 05:15:27 - 05:45:27 | 10650 |
| Cedarville | 05:30:28 | -54.9 | Dark | Down | 46.6 | 95.5 | Up | 05:15:28 - 05:45:28 | 10584 |
| Fall River/Burney | 05:30:32 | -54.2 | Dark | Down | 45.8 | 94.1 | Up | 05:15:32 - 05:45:32 | 10573 |
| Susanville | 05:30:31 | -54.9 | Dark | Down | 46.4 | 94.0 | Up | 05:15:31 - 05:45:31 | 10492 |
| Greenville | 05:30:33 | -54.8 | Dark | Down | 46.2 | 93.5 | Up | 05:15:33 - 05:45:33 | 10474 |
| Gimple | 05:30:33 | -54.9 | Dark | Down | 46.2 | 93.5 | Up | 05:15:33 - 05:45:33 | 10471 |
| Quincy | 05:30:33 | -54.9 | Dark | Down | 46.2 | 93.3 | Up | 05:15:33 - 05:45:33 | 10455 |
| Portola | 05:30:32 | -55.3 | Dark | Down | 46.6 | 93.5 | Up | 05:15:32 - 05:45:32 | 10429 |
| Reno | 05:30:32 | -55.9 | Dark | Down | 47.1 | 93.6 | Up | 05:15:32 - 05:45:32 | 10384 |
| Carson City | 05:30:33 | -56.0 | Dark | Down | 47.1 | 93.3 | Up | 05:15:33 - 05:45:33 | 10349 |
| Gardnerville | 05:30:33 | -56.1 | Dark | Down | 47.2 | 93.0 | Up | 05:15:33 - 05:45:33 | 10324 |
| Yerington | 05:30:32 | -56.5 | Dark | Down | 47.6 | 93.5 | Up | 05:15:32 - 05:45:32 | 10311 |
| Hawthorne | 05:30:31 | -57.1 | Dark | Down | 48.1 | 93.3 | Up | 05:15:31 - 05:45:31 | 10251 |
| Lee Vining | 05:30:34 | -56.9 | Dark | Down | 47.7 | 92.4 | Up | 05:15:34 - 05:45:34 | 10210 |
| Tonopah | 05:30:29 | -58.3 | Dark | Down | 49.2 | 93.7 | Up | 05:15:29 - 05:45:29 | 10164 |
| Bishop | 05:30:33 | -57.6 | Dark | Down | 48.3 | 92.2 | Up | 05:15:33 - 05:45:33 | 10130 |
| Dunrhomin | 05:29:53 | -65.1 | Dark | Down | 57.9 | 106.4 | Up | 05:14:53 - 05:44:53 | 10074 |
| Beatty | 05:30:31 | -59.0 | Dark | Down | 49.6 | 92.7 | Up | 05:15:31 - 05:45:31 | 10036 |
| Indian Springs | 05:30:28 | -59.9 | Dark | Down | 50.5 | 93.0 | Up | 05:15:28 - 05:45:28 | 9973 |
| Henderson | 05:30:28 | -60.6 | Dark | Down | 51.1 | 92.8 | Up | 05:15:28 - 05:45:28 | 9899 |
| Wildwood | 05:30:41 | -58.4 | Dark | Down | 48.2 | 88.4 | Up | 05:15:41 - 05:45:41 | 9812 |
| Patrick | 05:30:26 | -61.7 | Dark | Down | 52.0 | 92.7 | Up | 05:15:26 - 05:45:26 | 9805 |
| Laughlin/Bullhead City | 05:30:28 | -61.2 | Dark | Down | 51.4 | 92.0 | Up | 05:15:28 - 05:45:28 | 9800 |
| Kingman/Dolan Springs | 05:30:26 | -61.6 | Dark | Down | 51.9 | 92.3 | Up | 05:15:26 - 05:45:26 | 9788 |
| Mohave Valley | 05:30:29 | -61.3 | Dark | Down | 51.5 | 91.6 | Up | 05:15:29 - 05:45:29 | 9772 |
| Lake Havasu City | 05:30:29 | -61.7 | Dark | Down | 51.7 | 91.3 | Up | 05:15:29 - 05:45:29 | 9725 |
| Idyllwild | 05:30:36 | -60.0 | Dark | Down | 49.7 | 89.0 | Up | 05:15:36 - 05:45:36 | 9719 |
| Parker | 05:30:29 | -61.8 | Dark | Down | 51.7 | 90.8 | Up | 05:15:29 - 05:45:29 | 9688 |
| Calipatria | 05:30:34 | -61.1 | Dark | Down | 50.7 | 88.9 | Up | 05:15:34 - 05:45:34 | 9621 |
| George/Scottsdale | 05:30:24 | -63.8 | Dark | Down | 53.7 | 91.7 | Up | 05:15:24 - 05:45:24 | 9576 |
| Yuma | 05:30:33 | -61.9 | Dark | Down | 51.4 | 88.8 | Up | 05:15:33 - 05:45:33 | 9550 |
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 03UN284, (2026/12/03 05:28UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:29 0.8 16.58 115 Alnath 05:26:17.6 +28:36:23 1.6 3.57 103 125 Tau 05:39:44.2 +25:53:49 5.2 1.03 100 PPM 094544 05:36:02.7 +26:16:05 8.3 0.63 101 PPM 094532 05:35:34.8 +25:52:15 9.9 0.22 101 03UN284 05:35:18.4 +25:39:31 15.3 101 Positions are for J2000
Event circumstances last updated at 2022/01/19 00:02:57 UT
Marc W. Buie, Southwest Research Institute