Event between (19521) Chaos and star GA1200:02141172 with event index number of 1253661
Geocentric closest approach at 2022/12/24 13:29:07 UTC
J2000 position of star is 05:58:04.3 +31:22:48
Equinox of date position of star is 05:59:32.8 +31:22:50
Stellar brightness G=14.7,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 161 degrees from the moon.
Moon is 2% illuminated.
TNO apparent brightness V=20.7
[RECON map]
TNO is 41.2 AU from the Sun
and 40.2 AU from the Earth.
The TNO is moving 25.4
km/sec on the sky relative to the star, or,
3.1 arcsec/hr.
The 1-sigma error in the time of the event is 341 seconds.
The 1-sigma cross-track error in the shadow position is
2112 km.
The sky-plane scale is
29154.5 km/arcsec.
The TNO has an absolute magnitude Hv=4.6
Diameter=711.2 km assuming a 5% albedo -- 28.1 sec chord
Diameter=290.4 km assuming a 30% albedo -- 11.5 sec chord
Dynamical classification is CLASSICAL
Star training set for 19521, (2022/12/24 13:35UT) Object RA Dec mag sep mel Pollux 07:46:43.2 +27:58:08 1.1 23.47 175 Alnath 05:27:44.8 +28:37:29 1.6 7.42 154 PPM 071002 05:56:28.5 +31:42:10 5.9 0.73 160 PPM 071093 06:01:49.4 +31:56:24 7.9 0.74 161 PPM 071032 05:58:26.7 +31:01:20 9.6 0.43 160 PPM 071041 05:58:50.7 +31:14:34 10.8 0.21 160 19521 05:59:33.7 +31:22:50 14.7 161 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
2.6 sigma about the mid-time.
The median site spacing is 18.1 km
RECON observability=0.7 and success probability=1.0%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Sleaford | 13:26:37 | -14.8 | AT | Down | 19.0 | 297.0 | Really Low | 13:11:37 - 13:41:37 | 7598 |
| Kamloops | 13:26:31 | -23.2 | Dark | Down | 26.9 | 287.6 | Low | 13:11:31 - 13:41:31 | 6997 |
| Kelowna | 13:26:27 | -22.5 | Dark | Down | 26.1 | 288.6 | Low | 13:11:27 - 13:41:27 | 6978 |
| Peachland | 13:26:27 | -22.7 | Dark | Down | 26.2 | 288.5 | Low | 13:11:27 - 13:41:27 | 6960 |
| Summerland | 13:26:27 | -22.6 | Dark | Down | 26.1 | 288.6 | Low | 13:11:27 - 13:41:27 | 6954 |
| Penticton | 13:26:27 | -22.5 | Dark | Down | 26.0 | 288.7 | Low | 13:11:27 - 13:41:27 | 6954 |
| Dunrhomin | 13:25:59 | -10.3 | NT | Down | 13.0 | 300.3 | Really Low | 13:10:59 - 13:40:59 | 6945 |
| Oliver | 13:26:25 | -22.5 | Dark | Down | 25.9 | 288.9 | Low | 13:11:25 - 13:41:25 | 6931 |
| Anarchist Mountain Observatory | 13:26:25 | -22.3 | Dark | Down | 25.7 | 289.1 | Low | 13:11:25 - 13:41:25 | 6928 |
| CU-SBO | 13:26:00 | -10.2 | NT | Down | 12.9 | 300.3 | Really Low | 13:11:00 - 13:41:00 | 6925 |
| Tonasket | 13:26:24 | -22.3 | Dark | Down | 25.7 | 289.1 | Low | 13:11:24 - 13:41:24 | 6905 |
| Okanogan | 13:26:23 | -22.4 | Dark | Down | 25.7 | 289.2 | Low | 13:11:23 - 13:41:23 | 6877 |
| Brewster | 13:26:22 | -22.4 | Dark | Down | 25.7 | 289.2 | Low | 13:11:22 - 13:41:22 | 6852 |
| Manson/Chelan | 13:26:21 | -22.7 | Dark | Down | 25.9 | 289.1 | Low | 13:11:21 - 13:41:21 | 6824 |
| Wenatchee | 13:26:20 | -22.7 | Dark | Down | 25.8 | 289.2 | Low | 13:11:20 - 13:41:20 | 6785 |
| Ellensburg | 13:26:18 | -22.8 | Dark | Down | 25.8 | 289.2 | Low | 13:11:18 - 13:41:18 | 6749 |
| PNWRO | 13:26:14 | -21.5 | Dark | Down | 24.4 | 290.7 | Low | 13:11:14 - 13:41:14 | 6748 |
| Victoria | 13:26:24 | -24.9 | Dark | Down | 28.1 | 286.7 | Low | 13:11:24 - 13:41:24 | 6741 |
| Yakima | 13:26:17 | -22.7 | Dark | Down | 25.7 | 289.4 | Low | 13:11:17 - 13:41:17 | 6720 |
| Toppenish/White Swan | 13:26:17 | -22.5 | Dark | Down | 25.5 | 289.6 | Low | 13:11:17 - 13:41:17 | 6712 |
| Goldendale | 13:26:14 | -22.7 | Dark | Down | 25.6 | 289.6 | Low | 13:11:14 - 13:41:14 | 6657 |
| The Dalles | 13:26:14 | -23.0 | Dark | Down | 25.8 | 289.4 | Low | 13:11:14 - 13:41:14 | 6626 |
| Maupin | 13:26:12 | -22.8 | Dark | Down | 25.6 | 289.7 | Low | 13:11:12 - 13:41:12 | 6602 |
| Sisters | 13:26:10 | -23.0 | Dark | Down | 25.6 | 289.8 | Low | 13:11:10 - 13:41:10 | 6519 |
| Bend | 13:26:09 | -22.8 | Dark | Down | 25.4 | 290.0 | Low | 13:11:09 - 13:41:09 | 6513 |
| Oregon Observatory | 13:26:09 | -22.8 | Dark | Down | 25.4 | 290.0 | Low | 13:11:09 - 13:41:09 | 6495 |
| North Lake | 13:26:06 | -22.3 | Dark | Down | 24.8 | 290.6 | Low | 13:11:06 - 13:41:06 | 6472 |
| Lakeview | 13:26:03 | -21.7 | Dark | Down | 24.1 | 291.4 | Low | 13:11:03 - 13:41:03 | 6418 |
| Chiloquin | 13:26:05 | -22.9 | Dark | Down | 25.3 | 290.4 | Low | 13:11:05 - 13:41:05 | 6382 |
| Cedarville | 13:26:01 | -21.4 | Dark | Down | 23.7 | 291.7 | Low | 13:11:01 - 13:41:01 | 6378 |
| Klamath Falls | 13:26:04 | -22.8 | Dark | Down | 25.1 | 290.6 | Low | 13:11:04 - 13:41:04 | 6360 |
| Fall River/Burney | 13:26:00 | -22.2 | Dark | Down | 24.4 | 291.3 | Low | 13:11:00 - 13:41:00 | 6288 |
| Susanville | 13:25:58 | -21.6 | Dark | Down | 23.7 | 291.9 | Low | 13:10:58 - 13:40:58 | 6274 |
| Tonopah | 13:25:51 | -18.4 | Dark | Down | 20.3 | 294.5 | Low | 13:10:51 - 13:40:51 | 6252 |
| Reno | 13:25:55 | -20.7 | Dark | Down | 22.7 | 292.7 | Low | 13:10:55 - 13:40:55 | 6246 |
| Gimple | 13:25:58 | -21.7 | Dark | Down | 23.7 | 291.9 | Low | 13:10:58 - 13:40:58 | 6243 |
| Greenville | 13:25:58 | -21.7 | Dark | Down | 23.8 | 291.9 | Low | 13:10:58 - 13:40:58 | 6240 |
| Portola | 13:25:56 | -21.3 | Dark | Down | 23.3 | 292.3 | Low | 13:10:56 - 13:40:56 | 6237 |
| Yerington | 13:25:54 | -20.1 | Dark | Down | 22.1 | 293.3 | Low | 13:10:54 - 13:40:54 | 6233 |
| Quincy | 13:25:57 | -21.7 | Dark | Down | 23.7 | 292.0 | Low | 13:10:57 - 13:40:57 | 6225 |
| Hawthorne | 13:25:52 | -19.6 | Dark | Down | 21.5 | 293.7 | Low | 13:10:52 - 13:40:52 | 6222 |
| Carson City | 13:25:54 | -20.6 | Dark | Down | 22.6 | 292.9 | Low | 13:10:54 - 13:40:54 | 6219 |
| Indian Springs | 13:25:47 | -16.8 | AT | Down | 18.6 | 295.8 | Really Low | 13:10:47 - 13:40:47 | 6210 |
| Patrick | 13:25:44 | -15.1 | AT | Down | 16.8 | 296.9 | Really Low | 13:10:44 - 13:40:44 | 6207 |
| Gardnerville | 13:25:54 | -20.6 | Dark | Down | 22.5 | 293.0 | Low | 13:10:54 - 13:40:54 | 6203 |
| Henderson | 13:25:45 | -16.1 | AT | Down | 17.8 | 296.3 | Really Low | 13:10:45 - 13:40:45 | 6202 |
| Beatty | 13:25:48 | -17.8 | AT | Down | 19.5 | 295.1 | Really Low | 13:10:48 - 13:40:48 | 6184 |
| Kingman/Dolan Springs | 13:25:43 | -15.2 | AT | Down | 16.8 | 296.9 | Really Low | 13:10:43 - 13:40:43 | 6181 |
| George/Scottsdale | 13:25:40 | -13.0 | AT | Down | 14.5 | 298.3 | Really Low | 13:10:40 - 13:40:40 | 6174 |
| Lee Vining | 13:25:51 | -19.8 | Dark | Down | 21.6 | 293.6 | Low | 13:10:51 - 13:40:51 | 6157 |
| Laughlin/Bullhead City | 13:25:43 | -15.6 | AT | Down | 17.2 | 296.7 | Really Low | 13:10:43 - 13:40:43 | 6154 |
| Bishop | 13:25:49 | -19.1 | Dark | Down | 20.9 | 294.2 | Low | 13:10:49 - 13:40:49 | 6144 |
| Mohave Valley | 13:25:42 | -15.5 | AT | Down | 17.0 | 296.8 | Really Low | 13:10:42 - 13:40:42 | 6134 |
| Lake Havasu City | 13:25:41 | -15.2 | AT | Down | 16.7 | 297.0 | Really Low | 13:10:41 - 13:40:41 | 6115 |
| Parker | 13:25:40 | -15.0 | AT | Down | 16.5 | 297.1 | Really Low | 13:10:40 - 13:40:40 | 6089 |
| Yuma | 13:25:37 | -14.9 | AT | Down | 16.1 | 297.3 | Really Low | 13:10:37 - 13:40:37 | 5959 |
| Calipatria | 13:25:38 | -15.7 | AT | Down | 17.0 | 296.8 | Really Low | 13:10:38 - 13:40:38 | 5950 |
| Idyllwild | 13:25:39 | -16.8 | AT | Down | 18.1 | 296.1 | Really Low | 13:10:39 - 13:40:39 | 5941 |
| Wildwood | 13:25:41 | -18.4 | Dark | Down | 19.7 | 295.2 | Really Low | 13:10:41 - 13:40:41 | 5878 |
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 19521, (2022/12/24 13:35UT) Object RA Dec mag sep mel Pollux 07:45:17.9 +28:01:33 1.1 23.47 175 Alnath 05:26:17.5 +28:36:23 1.6 7.42 154 PPM 071002 05:54:58.9 +31:42:02 5.9 0.73 160 PPM 071093 06:00:19.6 +31:56:26 7.9 0.74 161 PPM 071032 05:56:57.6 +31:01:16 9.6 0.43 160 PPM 071041 05:57:21.4 +31:14:31 10.8 0.21 160 19521 05:58:04.3 +31:22:48 14.7 161 Positions are for J2000
Event circumstances last updated at 2022/10/02 04:12:03 UT
Marc W. Buie, Southwest Research Institute