Event between (500833) 13GD137 and star GA0740:05394435 with event index number of 2455444
Geocentric closest approach at 2023/05/18 09:58:30 UTC
J2000 position of star is 15:13:32.0 -14:43:58
Equinox of date position of star is 15:14:46.3 -14:48:53
Stellar brightness G=16.7,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 171 degrees from the moon.
Moon is 2% illuminated.
TNO apparent brightness V=23.8
[RECON map]
TNO is 35.8 AU from the Sun
and 34.8 AU from the Earth.
The TNO is moving 24.1
km/sec on the sky relative to the star, or,
3.4 arcsec/hr.
The 1-sigma error in the time of the event is 757 seconds.
The 1-sigma cross-track error in the shadow position is
5433 km.
The sky-plane scale is
25271.6 km/arcsec.
The TNO has an absolute magnitude Hv=8.3
Diameter=131.8 km assuming a 5% albedo -- 5.5 sec chord
Diameter=53.8 km assuming a 30% albedo -- 2.2 sec chord
Dynamical classification is 3:2E
Star training set for 500833, (2023/05/18 09:58UT) Object RA Dec mag sep mel Antares 16:30:50.7 -26:28:55 0.9 21.22 152 27Bet Lib 15:18:16.1 -09:28:04 2.6 5.42 168 21Nu Lib 15:07:56.1 -16:20:46 5.2 2.26 173 PPM 229893 15:13:31.7 -14:28:56 8.4 0.46 171 PPM 229924 15:14:57.0 -14:52:06 9.5 0.06 171 500833 15:14:50.0 -14:49:08 16.7 171 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
1.2 sigma about the mid-time.
The median site spacing is 16.6 km
RECON observability=0.7 and success probability=2.4%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Sleaford | 09:57:33 | -8.6 | NT | Down | 10.0 | 229.7 | Really Low | 09:42:33 - 10:12:33 | 8207 |
| Kamloops | 09:57:58 | -15.0 | AT | Down | 17.2 | 217.1 | Really Low | 09:42:58 - 10:12:58 | 8128 |
| Kelowna | 09:57:54 | -15.4 | AT | Down | 17.5 | 218.1 | Really Low | 09:42:54 - 10:12:54 | 8104 |
| Peachland | 09:57:55 | -15.6 | AT | Down | 17.7 | 217.8 | Really Low | 09:42:55 - 10:12:55 | 8099 |
| Summerland | 09:57:54 | -15.7 | AT | Down | 17.8 | 217.9 | Really Low | 09:42:54 - 10:12:54 | 8094 |
| Penticton | 09:57:53 | -15.7 | AT | Down | 17.8 | 218.1 | Really Low | 09:42:53 - 10:12:53 | 8092 |
| Oliver | 09:57:52 | -16.0 | AT | Down | 18.1 | 218.1 | Really Low | 09:42:52 - 10:12:52 | 8079 |
| Anarchist Mountain Observatory | 09:57:51 | -16.1 | AT | Down | 18.1 | 218.3 | Really Low | 09:42:51 - 10:12:51 | 8074 |
| Tonasket | 09:57:51 | -16.4 | AT | Down | 18.4 | 218.3 | Really Low | 09:42:51 - 10:12:51 | 8062 |
| Okanogan | 09:57:51 | -16.7 | AT | Down | 18.7 | 218.3 | Really Low | 09:42:51 - 10:12:51 | 8048 |
| Brewster | 09:57:50 | -17.0 | AT | Down | 19.0 | 218.1 | Really Low | 09:42:50 - 10:12:50 | 8036 |
| Victoria | 09:58:02 | -17.8 | AT | Down | 20.1 | 214.7 | Low | 09:43:02 - 10:13:02 | 8030 |
| Manson/Chelan | 09:57:51 | -17.3 | AT | Down | 19.3 | 217.8 | Really Low | 09:42:51 - 10:12:51 | 8026 |
| Wenatchee | 09:57:50 | -17.8 | AT | Down | 19.8 | 217.8 | Really Low | 09:42:50 - 10:12:50 | 8006 |
| Ellensburg | 09:57:49 | -18.3 | Dark | Down | 20.2 | 217.7 | Low | 09:42:49 - 10:12:49 | 7988 |
| Yakima | 09:57:48 | -18.6 | Dark | Down | 20.5 | 217.7 | Low | 09:42:48 - 10:12:48 | 7971 |
| Toppenish/White Swan | 09:57:47 | -18.7 | Dark | Down | 20.6 | 217.9 | Low | 09:42:47 - 10:12:47 | 7963 |
| PNWRO | 09:57:43 | -18.5 | Dark | Down | 20.3 | 219.4 | Low | 09:42:43 - 10:12:43 | 7956 |
| Goldendale | 09:57:47 | -19.4 | Dark | Down | 21.2 | 217.7 | Low | 09:42:47 - 10:12:47 | 7937 |
| The Dalles | 09:57:47 | -19.7 | Dark | Down | 21.6 | 217.4 | Low | 09:42:47 - 10:12:47 | 7925 |
| Maupin | 09:57:46 | -20.0 | Dark | Down | 21.9 | 217.6 | Low | 09:42:46 - 10:12:46 | 7907 |
| Sisters | 09:57:45 | -21.0 | Dark | Down | 22.8 | 217.3 | Low | 09:42:45 - 10:12:45 | 7865 |
| Bend | 09:57:44 | -21.1 | Dark | Down | 22.9 | 217.6 | Low | 09:42:44 - 10:12:44 | 7856 |
| Oregon Observatory | 09:57:44 | -21.3 | Dark | Down | 23.1 | 217.5 | Low | 09:42:44 - 10:12:44 | 7847 |
| North Lake | 09:57:41 | -21.6 | Dark | Down | 23.3 | 218.2 | Low | 09:42:41 - 10:12:41 | 7820 |
| Chiloquin | 09:57:42 | -22.6 | Dark | Down | 24.3 | 217.5 | Low | 09:42:42 - 10:12:42 | 7781 |
| Lakeview | 09:57:37 | -22.4 | Dark | Down | 23.9 | 219.0 | Low | 09:42:37 - 10:12:37 | 7773 |
| Klamath Falls | 09:57:41 | -22.9 | Dark | Down | 24.5 | 217.7 | Low | 09:42:41 - 10:12:41 | 7765 |
| Cedarville | 09:57:34 | -22.9 | Dark | Down | 24.3 | 219.3 | Low | 09:42:34 - 10:12:34 | 7741 |
| Dunrhomin | 09:56:54 | -17.0 | AT | Down | 17.2 | 232.4 | Really Low | 09:41:54 - 10:11:54 | 7715 |
| Fall River/Burney | 09:57:37 | -23.7 | Dark | Down | 25.3 | 218.3 | Low | 09:42:37 - 10:12:37 | 7708 |
| CU-SBO | 09:56:53 | -17.3 | AT | Down | 17.4 | 232.4 | Really Low | 09:41:53 - 10:11:53 | 7702 |
| Susanville | 09:57:33 | -24.0 | Dark | Down | 25.4 | 219.2 | Low | 09:42:33 - 10:12:33 | 7680 |
| Gimple | 09:57:32 | -24.3 | Dark | Down | 25.8 | 219.1 | Low | 09:42:32 - 10:12:32 | 7664 |
| Greenville | 09:57:34 | -24.4 | Dark | Down | 25.8 | 219.0 | Low | 09:42:34 - 10:12:34 | 7664 |
| Quincy | 09:57:33 | -24.5 | Dark | Down | 25.9 | 219.1 | Low | 09:42:33 - 10:12:33 | 7653 |
| Portola | 09:57:31 | -24.5 | Dark | Down | 25.8 | 219.6 | Low | 09:42:31 - 10:12:31 | 7650 |
| Reno | 09:57:29 | -24.4 | Dark | Down | 25.7 | 220.2 | Low | 09:42:29 - 10:12:29 | 7640 |
| Carson City | 09:57:28 | -24.7 | Dark | Down | 26.0 | 220.4 | Low | 09:42:28 - 10:12:28 | 7620 |
| Yerington | 09:57:26 | -24.6 | Dark | Down | 25.8 | 221.0 | Low | 09:42:26 - 10:12:26 | 7614 |
| Gardnerville | 09:57:27 | -24.9 | Dark | Down | 26.1 | 220.5 | Low | 09:42:27 - 10:12:27 | 7607 |
| Hawthorne | 09:57:23 | -24.8 | Dark | Down | 25.9 | 221.6 | Low | 09:42:23 - 10:12:23 | 7591 |
| Tonopah | 09:57:18 | -24.6 | Dark | Down | 25.5 | 223.0 | Low | 09:42:18 - 10:12:18 | 7574 |
| Lee Vining | 09:57:23 | -25.5 | Dark | Down | 26.6 | 221.4 | Low | 09:42:23 - 10:12:23 | 7557 |
| Bishop | 09:57:20 | -25.7 | Dark | Down | 26.6 | 222.2 | Low | 09:42:20 - 10:12:20 | 7527 |
| Beatty | 09:57:13 | -25.3 | Dark | Down | 26.1 | 223.8 | Low | 09:42:13 - 10:12:13 | 7509 |
| Indian Springs | 09:57:09 | -25.1 | Dark | Down | 25.7 | 224.8 | Low | 09:42:09 - 10:12:09 | 7495 |
| Henderson | 09:57:07 | -25.2 | Dark | Down | 25.7 | 225.6 | Low | 09:42:07 - 10:12:07 | 7467 |
| Patrick | 09:57:01 | -25.2 | Dark | Down | 25.5 | 226.8 | Low | 09:42:01 - 10:12:01 | 7434 |
| Kingman/Dolan Springs | 09:57:02 | -25.4 | Dark | Down | 25.8 | 226.7 | Low | 09:42:02 - 10:12:02 | 7419 |
| Laughlin/Bullhead City | 09:57:03 | -25.7 | Dark | Down | 26.1 | 226.3 | Low | 09:42:03 - 10:12:03 | 7415 |
| Mohave Valley | 09:57:03 | -25.9 | Dark | Down | 26.3 | 226.4 | Low | 09:42:03 - 10:12:03 | 7399 |
| Lake Havasu City | 09:57:01 | -26.1 | Dark | Down | 26.4 | 226.7 | Low | 09:42:01 - 10:12:01 | 7375 |
| Parker | 09:57:00 | -26.4 | Dark | Down | 26.6 | 226.9 | Low | 09:42:00 - 10:12:00 | 7354 |
| George/Scottsdale | 09:56:53 | -25.5 | Dark | Down | 25.4 | 229.0 | Low | 09:41:53 - 10:11:53 | 7335 |
| Wildwood | 09:57:12 | -28.5 | Dark | Down | 29.2 | 223.2 | Low | 09:42:12 - 10:12:12 | 7329 |
| Idyllwild | 09:57:06 | -27.9 | Dark | Down | 28.3 | 225.0 | Low | 09:42:06 - 10:12:06 | 7318 |
| Calipatria | 09:57:01 | -27.8 | Dark | Down | 28.1 | 226.2 | Low | 09:42:01 - 10:12:01 | 7284 |
| Yuma | 09:56:57 | -27.7 | Dark | Down | 27.8 | 227.1 | Low | 09:41:57 - 10:11:57 | 7260 |
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 500833, (2023/05/18 09:58UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 21.22 152 27Bet Lib 15:17:00.3 -09:22:59 2.6 5.42 168 21Nu Lib 15:06:37.6 -16:15:25 5.2 2.26 173 PPM 229893 15:12:13.8 -14:23:44 8.4 0.46 171 PPM 229924 15:13:38.9 -14:46:56 9.5 0.06 171 500833 15:13:32.0 -14:43:58 16.7 171 Positions are for J2000
Event circumstances last updated at 2022/04/02 01:18:07 UT
Marc W. Buie, Southwest Research Institute