Event between (50000) Quaoar and star GA0740:23975023 with event index number of 2327378
Geocentric closest approach at 2026/05/17 07:03:48 UTC
J2000 position of star is 18:49:41.2 -14:47:53
Equinox of date position of star is 18:51:03.8 -14:46:07
Stellar brightness G=16.2,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 139 degrees from the moon.
Moon is 1% illuminated.
Apparent brightness V=18.8
[RECON map]
Object is 42.6 AU from the Sun
and 41.9 AU from the Earth.
Apparent velocity is 15.9
km/sec on the sky relative to the star, or,
1.9 arcsec/hr.
The 1-sigma error in the time of the event is 168 seconds.
The 1-sigma cross-track error in the shadow position is
1655 km.
The sky-plane scale is
30399.2 km/arcsec.
The object has an absolute magnitude Hv=2.4
Diameter=1905.5 km assuming a 5% albedo -- 124.6 sec chord
Diameter=777.9 km assuming a 30% albedo -- 50.9 sec chord
Dynamical classification is CLASSICAL
Star training set for 50000, (2026/05/17 07:03UT) Object RA Dec mag sep mel Antares 16:31:01.7 -26:29:17 0.9 34.69 173 Nunki 18:56:53.9 -26:15:41 2.0 11.57 141 PPM 235105 18:52:00.6 -13:32:23 6.5 1.24 138 PPM 235085 18:51:14.6 -15:01:04 8.4 0.25 139 50000 18:51:11.4 -14:45:57 16.2 138 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 14.0 km
RECON observability=0.1 and success probability=15.3%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Sleaford | 07:07:23 | -18.5 | Dark | Down | 12.0 | 134.2 | Really Low | 06:52:55 - 07:21:51 | 41 |
| Kamloops | 07:08:04 | -19.1 | Dark | Down | 5.8 | 122.0 | Really Low | 06:53:36 - 07:22:32 | -307 |
| Kelowna | 07:08:05 | -20.0 | Dark | Down | 6.8 | 122.6 | Really Low | 06:53:37 - 07:22:33 | -343 |
| Peachland | 07:08:06 | -20.1 | Dark | Down | 6.7 | 122.4 | Really Low | 06:53:38 - 07:22:34 | -356 |
| Summerland | 07:08:07 | -20.3 | Dark | Down | 6.8 | 122.5 | Really Low | 06:53:39 - 07:22:35 | -364 |
| Penticton | 07:08:07 | -20.3 | Dark | Down | 6.9 | 122.5 | Really Low | 06:53:39 - 07:22:35 | -366 |
| Oliver | 07:08:08 | -20.7 | Dark | Down | 7.1 | 122.5 | Really Low | 06:53:40 - 07:22:36 | -390 |
| Anarchist Mountain Observatory | 07:08:09 | -20.9 | Dark | Down | 7.3 | 122.7 | Really Low | 06:53:41 - 07:22:37 | -397 |
| Okanogan | 07:08:12 | -21.5 | Dark | Down | 7.5 | 122.4 | Really Low | 06:53:44 - 07:22:40 | -445 |
| Brewster | 07:08:13 | -21.7 | Dark | Down | 7.5 | 122.2 | Really Low | 06:53:45 - 07:22:41 | -467 |
| Manson/Chelan | 07:08:15 | -21.9 | Dark | Down | 7.5 | 121.9 | Really Low | 06:53:47 - 07:22:43 | -489 |
| Victoria | 07:08:19 | -20.7 | Dark | Down | 5.3 | 119.4 | Really Low | 06:53:51 - 07:22:47 | -510 |
| Wenatchee | 07:08:17 | -22.3 | Dark | Down | 7.6 | 121.7 | Really Low | 06:53:49 - 07:22:45 | -525 |
| Ellensburg | 07:08:20 | -22.7 | Dark | Down | 7.7 | 121.5 | Really Low | 06:53:52 - 07:22:48 | -558 |
| Yakima | 07:08:21 | -23.1 | Dark | Down | 7.9 | 121.5 | Really Low | 06:53:53 - 07:22:49 | -587 |
| PNWRO | 07:08:20 | -23.9 | Dark | Down | 9.2 | 122.7 | Really Low | 06:53:52 - 07:22:48 | -594 |
| Toppenish/White Swan | 07:08:21 | -23.3 | Dark | Down | 8.1 | 121.6 | Really Low | 06:53:53 - 07:22:49 | -599 |
| The Dalles | 07:08:27 | -24.0 | Dark | Down | 8.1 | 120.9 | Really Low | 06:53:59 - 07:22:55 | -671 |
| Maupin | 07:08:28 | -24.4 | Dark | Down | 8.4 | 120.9 | Really Low | 06:54:00 - 07:22:56 | -699 |
| Dunrhomin | 07:07:59 | -30.3 | Dark | Down | 20.6 | 132.5 | Low | 06:53:31 - 07:22:27 | -719 |
| Nikitin | 07:07:59 | -30.5 | Dark | Down | 20.7 | 132.4 | Low | 06:53:31 - 07:22:27 | -733 |
| CU-SBO | 07:08:00 | -30.6 | Dark | Down | 20.7 | 132.3 | Low | 06:53:32 - 07:22:28 | -739 |
| Sisters | 07:08:32 | -25.2 | Dark | Down | 8.5 | 120.5 | Really Low | 06:54:04 - 07:23:00 | -773 |
| Bend | 07:08:33 | -25.4 | Dark | Down | 8.8 | 120.6 | Really Low | 06:54:05 - 07:23:01 | -785 |
| Oregon Observatory | 07:08:34 | -25.6 | Dark | Down | 8.8 | 120.5 | Really Low | 06:54:06 - 07:23:02 | -801 |
| Chiloquin | 07:08:39 | -26.8 | Dark | Down | 9.2 | 120.0 | Really Low | 06:54:11 - 07:23:07 | -909 |
| Klamath Falls | 07:08:41 | -27.1 | Dark | Down | 9.4 | 120.0 | Really Low | 06:54:13 - 07:23:09 | -934 |
| Cedarville | 07:08:39 | -28.1 | Dark | Down | 10.8 | 121.1 | Really Low | 06:54:11 - 07:23:07 | -951 |
| Fall River/Burney | 07:08:44 | -28.4 | Dark | Down | 10.3 | 120.2 | Really Low | 06:54:16 - 07:23:12 | -1016 |
| Gimple | 07:08:46 | -29.3 | Dark | Down | 11.1 | 120.4 | Really Low | 06:54:18 - 07:23:14 | -1076 |
| Greenville | 07:08:46 | -29.3 | Dark | Down | 11.1 | 120.3 | Really Low | 06:54:18 - 07:23:14 | -1077 |
| Portola | 07:08:47 | -29.7 | Dark | Down | 11.5 | 120.6 | Really Low | 06:54:19 - 07:23:15 | -1092 |
| Quincy | 07:08:47 | -29.5 | Dark | Down | 11.2 | 120.3 | Really Low | 06:54:19 - 07:23:15 | -1093 |
| Reno | 07:08:45 | -30.1 | Dark | Down | 12.1 | 121.0 | Really Low | 06:54:17 - 07:23:13 | -1098 |
| Carson City | 07:08:47 | -30.5 | Dark | Down | 12.3 | 121.0 | Really Low | 06:54:19 - 07:23:15 | -1126 |
| Yerington | 07:08:46 | -30.7 | Dark | Down | 12.8 | 121.4 | Really Low | 06:54:18 - 07:23:14 | -1127 |
| Gardnerville | 07:08:47 | -30.7 | Dark | Down | 12.5 | 121.0 | Really Low | 06:54:19 - 07:23:15 | -1145 |
| Hawthorne | 07:08:46 | -31.3 | Dark | Down | 13.4 | 121.7 | Really Low | 06:54:18 - 07:23:14 | -1152 |
| Lee Vining | 07:08:49 | -31.8 | Dark | Down | 13.4 | 121.3 | Really Low | 06:54:21 - 07:23:17 | -1209 |
| Beatty | 07:08:46 | -33.2 | Dark | Down | 15.5 | 122.7 | Really Low | 06:54:18 - 07:23:14 | -1240 |
| Bishop | 07:08:49 | -32.5 | Dark | Down | 14.2 | 121.6 | Really Low | 06:54:21 - 07:23:17 | -1241 |
| Patrick | 07:08:41 | -35.0 | Dark | Down | 18.3 | 124.4 | Really Low | 06:54:13 - 07:23:09 | -1294 |
| Laughlin/Bullhead City | 07:08:44 | -35.1 | Dark | Down | 18.0 | 123.8 | Really Low | 06:54:16 - 07:23:12 | -1331 |
| Lake Havasu City | 07:08:46 | -35.8 | Dark | Down | 18.5 | 123.8 | Really Low | 06:54:18 - 07:23:14 | -1381 |
| George/Scottsdale | 07:08:39 | -36.8 | Dark | Down | 20.6 | 125.4 | Low | 06:54:11 - 07:23:07 | -1387 |
| Idyllwild | 07:08:55 | -36.3 | Dark | Down | 17.3 | 122.0 | Really Low | 06:54:27 - 07:23:23 | -1503 |
| Wildwood | 07:08:59 | -35.6 | Dark | Down | 15.8 | 120.8 | Really Low | 06:54:31 - 07:23:27 | -1519 |
| Calipatria | 07:08:53 | -37.1 | Dark | Down | 18.4 | 122.6 | Really Low | 06:54:25 - 07:23:21 | -1527 |
| Yuma | 07:08:51 | -37.6 | Dark | Down | 19.3 | 123.1 | Really Low | 06:54:23 - 07:23:19 | -1542 |
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 50000, (2026/05/17 07:03UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 34.69 173 Nunki 18:55:15.9 -26:17:49 2.0 11.57 141 PPM 235105 18:50:31.2 -13:34:20 6.5 1.24 138 PPM 235085 18:49:44.3 -15:03:00 8.4 0.25 139 50000 18:49:41.2 -14:47:53 16.2 139 Positions are for J2000
Event circumstances last updated at 2024/03/04 05:58:25 UT
Marc W. Buie, Southwest Research Institute