Event between (523800) 17KZ31 and star GA1100:03170314 with event index number of 2432022
Geocentric closest approach at 2023/12/20 09:43:00 UTC
J2000 position of star is 09:15:25.4 +20:20:53
Equinox of date position of star is 09:16:41.2 +20:15:16
Stellar brightness G=15.5,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 129 degrees from the moon.
Moon is 57% illuminated.
TNO apparent brightness V=22.4
[RECON map]
TNO is 15.8 AU from the Sun
and 15.1 AU from the Earth.
The TNO is moving 29.2
km/sec on the sky relative to the star, or,
9.6 arcsec/hr.
The 1-sigma error in the time of the event is 40 seconds.
The 1-sigma cross-track error in the shadow position is
1007 km.
The sky-plane scale is
10954.5 km/arcsec.
The TNO has an absolute magnitude Hv=10.3
Diameter=51.3 km assuming a 5% albedo -- 1.8 sec chord
Diameter=20.9 km assuming a 30% albedo -- 0.7 sec chord
Dynamical classification is CENTAURR
Star training set for 523800, (2023/12/20 09:44UT) Object RA Dec mag sep mel Regulus 10:09:38.8 +11:50:57 1.3 15.21 143 PPM 099404 09:14:59.1 +21:10:59 6.1 1.03 128 PPM 099441 09:17:25.8 +19:58:20 8.7 0.31 129 523800 09:16:46.9 +20:14:51 15.5 129 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 27.4 km
RECON observability=1.0 and success probability=27.5%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Sleaford | 09:44:12 | -47.8 | Dark | Down | 57.3 | 162.4 | Up | 09:40:25 - 09:48:00 | 2943 |
| Kamloops | 09:44:42 | -55.9 | Dark | Down | 54.1 | 138.8 | Up | 09:40:55 - 09:48:30 | 2488 |
| Kelowna | 09:44:40 | -56.0 | Dark | Down | 55.1 | 139.3 | Up | 09:40:52 - 09:48:27 | 2424 |
| Peachland | 09:44:41 | -56.2 | Dark | Down | 55.1 | 138.8 | Up | 09:40:53 - 09:48:28 | 2407 |
| Summerland | 09:44:40 | -56.3 | Dark | Down | 55.2 | 138.8 | Up | 09:40:53 - 09:48:28 | 2394 |
| Penticton | 09:44:40 | -56.3 | Dark | Down | 55.3 | 138.9 | Up | 09:40:52 - 09:48:27 | 2389 |
| Oliver | 09:44:39 | -56.5 | Dark | Down | 55.6 | 138.5 | Up | 09:40:52 - 09:48:27 | 2354 |
| Anarchist Mountain Observatory | 09:44:39 | -56.5 | Dark | Down | 55.8 | 138.6 | Up | 09:40:52 - 09:48:27 | 2341 |
| Tonasket | 09:44:39 | -56.8 | Dark | Down | 56.0 | 138.2 | Up | 09:40:52 - 09:48:27 | 2308 |
| Okanogan | 09:44:40 | -57.1 | Dark | Down | 56.2 | 137.7 | Up | 09:40:52 - 09:48:27 | 2272 |
| Brewster | 09:44:40 | -57.3 | Dark | Down | 56.3 | 137.1 | Up | 09:40:52 - 09:48:27 | 2240 |
| Victoria | 09:44:45 | -58.8 | Dark | Down | 54.3 | 132.4 | Up | 09:40:58 - 09:48:33 | 2217 |
| Manson/Chelan | 09:44:41 | -57.7 | Dark | Down | 56.3 | 136.3 | Up | 09:40:53 - 09:48:28 | 2212 |
| Wenatchee | 09:44:41 | -58.0 | Dark | Down | 56.5 | 135.6 | Up | 09:40:53 - 09:48:28 | 2160 |
| Ellensburg | 09:44:41 | -58.4 | Dark | Down | 56.7 | 134.8 | Up | 09:40:53 - 09:48:28 | 2114 |
| Yakima | 09:44:41 | -58.7 | Dark | Down | 57.0 | 134.4 | Up | 09:40:54 - 09:48:29 | 2072 |
| Toppenish/White Swan | 09:44:41 | -58.7 | Dark | Down | 57.2 | 134.4 | Up | 09:40:53 - 09:48:28 | 2053 |
| PNWRO | 09:44:37 | -58.1 | Dark | Down | 58.2 | 136.2 | Up | 09:40:49 - 09:48:24 | 2047 |
| Goldendale | 09:44:41 | -59.3 | Dark | Down | 57.4 | 133.1 | Up | 09:40:54 - 09:48:29 | 1988 |
| The Dalles | 09:44:42 | -59.6 | Dark | Down | 57.4 | 132.3 | Up | 09:40:54 - 09:48:29 | 1957 |
| Maupin | 09:44:42 | -59.8 | Dark | Down | 57.7 | 132.0 | Up | 09:40:54 - 09:48:29 | 1916 |
| Dunrhomin | 09:43:58 | -51.4 | Dark | Down | 68.6 | 155.5 | Up | 09:40:10 - 09:47:45 | 1834 |
| Sisters | 09:44:43 | -60.6 | Dark | Down | 58.0 | 130.2 | Up | 09:40:55 - 09:48:30 | 1815 |
| CU-SBO | 09:43:58 | -51.5 | Dark | Down | 68.8 | 155.0 | Up | 09:40:10 - 09:47:45 | 1806 |
| Bend | 09:44:42 | -60.6 | Dark | Down | 58.3 | 130.3 | Up | 09:40:54 - 09:48:29 | 1796 |
| Oregon Observatory | 09:44:42 | -60.8 | Dark | Down | 58.4 | 129.9 | Up | 09:40:55 - 09:48:30 | 1775 |
| North Lake | 09:44:41 | -60.9 | Dark | Down | 59.1 | 129.9 | Up | 09:40:53 - 09:48:28 | 1720 |
| Chiloquin | 09:44:43 | -61.8 | Dark | Down | 59.0 | 127.6 | Up | 09:40:55 - 09:48:30 | 1630 |
| Lakeview | 09:44:39 | -61.1 | Dark | Down | 60.1 | 129.3 | Up | 09:40:51 - 09:48:26 | 1622 |
| Klamath Falls | 09:44:42 | -62.0 | Dark | Down | 59.2 | 127.3 | Up | 09:40:54 - 09:48:29 | 1595 |
| Cedarville | 09:44:38 | -61.4 | Dark | Down | 60.6 | 128.7 | Up | 09:40:50 - 09:48:25 | 1557 |
| Fall River/Burney | 09:44:40 | -62.4 | Dark | Down | 60.1 | 126.2 | Up | 09:40:53 - 09:48:28 | 1480 |
| Susanville | 09:44:38 | -62.2 | Dark | Down | 61.0 | 126.4 | Up | 09:40:51 - 09:48:26 | 1430 |
| Gimple | 09:44:38 | -62.5 | Dark | Down | 61.0 | 125.7 | Up | 09:40:51 - 09:48:26 | 1396 |
| Greenville | 09:44:39 | -62.6 | Dark | Down | 61.0 | 125.6 | Up | 09:40:52 - 09:48:27 | 1394 |
| Quincy | 09:44:38 | -62.7 | Dark | Down | 61.1 | 125.3 | Up | 09:40:51 - 09:48:26 | 1373 |
| Portola | 09:44:38 | -62.4 | Dark | Down | 61.4 | 125.8 | Up | 09:40:50 - 09:48:25 | 1371 |
| Reno | 09:44:35 | -62.1 | Dark | Down | 62.0 | 126.3 | Up | 09:40:48 - 09:48:23 | 1357 |
| Carson City | 09:44:36 | -62.2 | Dark | Down | 62.2 | 125.8 | Up | 09:40:48 - 09:48:23 | 1320 |
| Yerington | 09:44:34 | -61.9 | Dark | Down | 62.7 | 126.4 | Up | 09:40:46 - 09:48:21 | 1315 |
| Gardnerville | 09:44:35 | -62.3 | Dark | Down | 62.4 | 125.5 | Up | 09:40:47 - 09:48:22 | 1296 |
| Hawthorne | 09:44:32 | -61.7 | Dark | Down | 63.3 | 126.5 | Up | 09:40:44 - 09:48:19 | 1278 |
| Tonopah | 09:44:28 | -60.9 | Dark | Down | 64.5 | 128.0 | Up | 09:40:40 - 09:48:15 | 1265 |
| Lee Vining | 09:44:33 | -62.3 | Dark | Down | 63.4 | 124.8 | Up | 09:40:45 - 09:48:20 | 1207 |
| Bishop | 09:44:31 | -62.0 | Dark | Down | 64.2 | 125.0 | Up | 09:40:43 - 09:48:18 | 1162 |
| Beatty | 09:44:26 | -60.9 | Dark | Down | 65.5 | 126.7 | Up | 09:40:38 - 09:48:13 | 1155 |
| Indian Springs | 09:44:22 | -60.2 | Dark | Down | 66.4 | 128.0 | Up | 09:40:35 - 09:48:10 | 1149 |
| Henderson | 09:44:20 | -59.9 | Dark | Down | 67.1 | 128.2 | Up | 09:40:33 - 09:48:08 | 1112 |
| Patrick | 09:44:16 | -59.2 | Dark | Down | 68.2 | 129.0 | Up | 09:40:29 - 09:48:04 | 1078 |
| Kingman/Dolan Springs | 09:44:17 | -59.4 | Dark | Down | 68.2 | 128.2 | Up | 09:40:29 - 09:48:04 | 1049 |
| Laughlin/Bullhead City | 09:44:18 | -59.8 | Dark | Down | 67.9 | 127.2 | Up | 09:40:31 - 09:48:06 | 1032 |
| Mohave Valley | 09:44:18 | -59.8 | Dark | Down | 68.1 | 126.7 | Up | 09:40:30 - 09:48:05 | 1004 |
| Lake Havasu City | 09:44:17 | -59.7 | Dark | Down | 68.5 | 126.3 | Up | 09:40:29 - 09:48:04 | 969 |
| George/Scottsdale | 09:44:09 | -57.9 | Dark | Down | 70.5 | 129.4 | Up | 09:40:22 - 09:47:57 | 960 |
| Parker | 09:44:16 | -59.8 | Dark | Down | 68.7 | 125.6 | Up | 09:40:29 - 09:48:04 | 933 |
| Idyllwild | 09:44:23 | -61.8 | Dark | Down | 67.3 | 120.8 | Up | 09:40:35 - 09:48:10 | 823 |
| Wildwood | 09:44:29 | -63.2 | Dark | Down | 65.7 | 118.7 | Up | 09:40:41 - 09:48:16 | 811 |
| Calipatria | 09:44:19 | -61.0 | Dark | Down | 68.4 | 121.4 | Up | 09:40:31 - 09:48:06 | 791 |
| Yuma | 09:44:16 | -60.3 | Dark | Down | 69.3 | 121.9 | Up | 09:40:28 - 09:48:03 | 771 |
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 523800, (2023/12/20 09:44UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 15.21 143 PPM 099404 09:13:37.2 +21:16:59 6.1 1.03 128 PPM 099441 09:16:04.4 +20:04:23 8.7 0.31 129 523800 09:15:25.4 +20:20:53 15.5 129 Positions are for J2000
Event circumstances last updated at 2022/04/16 00:20:23 UT
Marc W. Buie, Southwest Research Institute