Event between (50000) Quaoar and star GA0740:22190371 with event index number of 1403244
Geocentric closest approach at 2025/06/25 06:56:15 UTC
J2000 position of star is 18:41:28.6 -14:53:33
Equinox of date position of star is 18:42:41.1 -14:52:16
Stellar brightness G=14.9,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 165 degrees from the moon.
Moon is 0% illuminated.
TNO apparent brightness V=18.8
[RECON map]
TNO is 42.6 AU from the Sun
and 41.6 AU from the Earth.
The TNO is moving 24.5
km/sec on the sky relative to the star, or,
2.9 arcsec/hr.
The 1-sigma error in the time of the event is 140 seconds.
The 1-sigma cross-track error in the shadow position is
1581 km.
The sky-plane scale is
30203.0 km/arcsec.
The TNO has an absolute magnitude Hv=2.5
Diameter=1896.8 km assuming a 5% albedo -- 77.3 sec chord
Diameter=774.4 km assuming a 30% albedo -- 31.6 sec chord
Dynamical classification is CLASSICAL
Star training set for 50000, (2025/06/25 06:56UT) Object RA Dec mag sep mel Antares 16:30:58.4 -26:29:11 0.9 32.86 158 Nunki 18:56:50.6 -26:15:46 2.0 11.85 169 PPM 234707 18:35:06.4 -14:49:57 6.1 1.89 165 PPM 234902 18:43:09.5 -14:32:17 6.6 0.33 164 PPM 234882 18:42:26.3 -14:51:49 8.9 0.12 165 50000 18:42:55.9 -14:52:00 14.9 164 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 15.6 km
RECON observability=1.0 and success probability=6.9%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Clarence Fulton | 06:57:05 | -15.1 | AT | Down | 22.1 | 157.3 | Low | 06:44:56 - 07:09:14 | -2653 |
| Kelowna | 06:57:06 | -15.4 | AT | Down | 22.4 | 157.1 | Low | 06:44:57 - 07:09:15 | -2671 |
| Peachland | 06:57:07 | -15.5 | AT | Down | 22.5 | 156.7 | Low | 06:44:58 - 07:09:16 | -2677 |
| Summerland | 06:57:06 | -15.6 | AT | Down | 22.6 | 156.8 | Low | 06:44:57 - 07:09:15 | -2684 |
| Penticton | 06:57:06 | -15.7 | AT | Down | 22.7 | 156.9 | Low | 06:44:57 - 07:09:15 | -2687 |
| Oliver | 06:57:07 | -16.1 | AT | Down | 23.0 | 156.9 | Low | 06:44:58 - 07:09:16 | -2704 |
| Anarchist Mountain Observatory | 06:57:07 | -16.3 | AT | Down | 23.2 | 157.0 | Low | 06:44:58 - 07:09:16 | -2711 |
| Tonasket | 06:57:07 | -16.5 | AT | Down | 23.5 | 156.9 | Low | 06:44:58 - 07:09:16 | -2727 |
| Okanogan | 06:57:08 | -16.8 | AT | Down | 23.8 | 156.7 | Low | 06:44:59 - 07:09:17 | -2744 |
| Victoria | 06:57:18 | -16.0 | AT | Down | 22.6 | 152.9 | Low | 06:45:09 - 07:09:27 | -2752 |
| Brewster | 06:57:09 | -17.1 | AT | Down | 24.0 | 156.4 | Low | 06:45:00 - 07:09:18 | -2759 |
| Manson/Chelan | 06:57:10 | -17.2 | AT | Down | 24.1 | 156.0 | Low | 06:45:01 - 07:09:19 | -2770 |
| Wenatchee | 06:57:11 | -17.6 | AT | Down | 24.5 | 155.8 | Low | 06:45:02 - 07:09:20 | -2795 |
| Ellensburg | 06:57:13 | -18.0 | AT | Down | 24.8 | 155.5 | Low | 06:45:04 - 07:09:22 | -2817 |
| Yakima | 06:57:13 | -18.4 | Dark | Down | 25.1 | 155.4 | Low | 06:45:04 - 07:09:22 | -2839 |
| Toppenish/White Swan | 06:57:13 | -18.6 | Dark | Down | 25.4 | 155.5 | Low | 06:45:04 - 07:09:22 | -2850 |
| Pasco | 06:57:10 | -19.0 | Dark | Down | 25.8 | 156.8 | Low | 06:45:01 - 07:09:19 | -2852 |
| PNWRO | 06:57:09 | -19.2 | Dark | Down | 26.1 | 157.0 | Low | 06:45:00 - 07:09:18 | -2864 |
| Goldendale | 06:57:15 | -19.1 | Dark | Down | 25.8 | 155.0 | Low | 06:45:06 - 07:09:24 | -2881 |
| The Dalles | 06:57:16 | -19.2 | Dark | Down | 25.9 | 154.6 | Low | 06:45:07 - 07:09:25 | -2895 |
| Maupin | 06:57:17 | -19.6 | Dark | Down | 26.3 | 154.6 | Low | 06:45:08 - 07:09:26 | -2917 |
| Redmond | 06:57:18 | -20.5 | Dark | Down | 27.1 | 154.3 | Low | 06:45:09 - 07:09:27 | -2968 |
| Sisters | 06:57:20 | -20.4 | Dark | Down | 26.9 | 153.9 | Low | 06:45:11 - 07:09:29 | -2968 |
| Bend | 06:57:19 | -20.6 | Dark | Down | 27.2 | 154.1 | Low | 06:45:10 - 07:09:28 | -2981 |
| Oregon Observatory | 06:57:20 | -20.8 | Dark | Down | 27.3 | 153.9 | Low | 06:45:11 - 07:09:29 | -2991 |
| La Pine/Gilchrist | 06:57:20 | -21.0 | Dark | Down | 27.5 | 153.8 | Low | 06:45:11 - 07:09:29 | -3003 |
| North Lake | 06:57:19 | -21.5 | Dark | Down | 28.1 | 154.4 | Low | 06:45:10 - 07:09:28 | -3026 |
| Paisley | 06:57:19 | -22.1 | Dark | Down | 28.7 | 154.6 | Low | 06:45:10 - 07:09:28 | -3057 |
| Chiloquin | 06:57:23 | -22.0 | Dark | Down | 28.4 | 153.2 | Low | 06:45:14 - 07:09:32 | -3070 |
| Lakeview | 06:57:19 | -22.6 | Dark | Down | 29.2 | 154.7 | Low | 06:45:10 - 07:09:28 | -3086 |
| Klamath Falls | 06:57:23 | -22.3 | Dark | Down | 28.7 | 153.2 | Low | 06:45:14 - 07:09:32 | -3090 |
| Cedarville | 06:57:19 | -23.3 | Dark | Down | 29.9 | 154.7 | Low | 06:45:10 - 07:09:28 | -3126 |
| Fall River/Burney | 06:57:23 | -23.5 | Dark | Down | 29.9 | 153.3 | Low | 06:45:14 - 07:09:32 | -3161 |
| Dunrhomin | 06:56:31 | -26.3 | Dark | Down | 34.4 | 170.9 | Up | 06:44:22 - 07:08:40 | -3186 |
| Susanville | 06:57:22 | -24.3 | Dark | Down | 30.7 | 153.9 | Up | 06:45:13 - 07:09:31 | -3197 |
| Gimple | 06:57:23 | -24.5 | Dark | Down | 30.9 | 153.6 | Up | 06:45:14 - 07:09:32 | -3216 |
| Greenville | 06:57:23 | -24.5 | Dark | Down | 30.9 | 153.6 | Up | 06:45:14 - 07:09:32 | -3216 |
| Quincy | 06:57:24 | -24.7 | Dark | Down | 31.0 | 153.5 | Up | 06:45:15 - 07:09:33 | -3229 |
| Portola | 06:57:22 | -24.9 | Dark | Down | 31.3 | 154.0 | Up | 06:45:13 - 07:09:31 | -3234 |
| Reno | 06:57:20 | -25.3 | Dark | Down | 31.8 | 154.6 | Up | 06:45:11 - 07:09:29 | -3249 |
| Carson City | 06:57:21 | -25.6 | Dark | Down | 32.1 | 154.5 | Up | 06:45:12 - 07:09:30 | -3272 |
| Yerington | 06:57:19 | -26.0 | Dark | Down | 32.5 | 155.1 | Up | 06:45:10 - 07:09:28 | -3282 |
| Gardnerville | 06:57:21 | -25.9 | Dark | Down | 32.3 | 154.5 | Up | 06:45:12 - 07:09:30 | -3288 |
| Hawthorne | 06:57:18 | -26.5 | Dark | Down | 33.1 | 155.6 | Up | 06:45:09 - 07:09:27 | -3311 |
| Tonopah | 06:57:13 | -27.3 | Dark | Down | 33.9 | 157.0 | Up | 06:45:04 - 07:09:22 | -3337 |
| Lee Vining | 06:57:20 | -27.0 | Dark | Down | 33.4 | 154.9 | Up | 06:45:11 - 07:09:29 | -3350 |
| Bishop | 06:57:18 | -27.7 | Dark | Down | 34.2 | 155.5 | Up | 06:45:09 - 07:09:27 | -3388 |
| Beatty | 06:57:13 | -28.5 | Dark | Down | 35.2 | 157.2 | Up | 06:45:04 - 07:09:22 | -3414 |
| Indian Springs | 06:57:10 | -29.0 | Dark | Down | 35.8 | 158.3 | Up | 06:45:01 - 07:09:19 | -3434 |
| Henderson | 06:57:08 | -29.6 | Dark | Down | 36.5 | 158.9 | Up | 06:44:59 - 07:09:17 | -3469 |
| Patrick | 06:57:04 | -30.4 | Dark | Down | 37.4 | 160.1 | Up | 06:44:55 - 07:09:13 | -3511 |
| Kingman/Dolan Springs | 06:57:06 | -30.6 | Dark | Down | 37.5 | 159.8 | Up | 06:44:57 - 07:09:15 | -3527 |
| Laughlin/Bullhead City | 06:57:07 | -30.5 | Dark | Down | 37.4 | 159.2 | Up | 06:44:58 - 07:09:16 | -3530 |
| CPSLO | 06:57:28 | -29.2 | Dark | Down | 35.3 | 152.5 | Up | 06:45:19 - 07:09:37 | -3540 |
| Mohave Valley | 06:57:08 | -30.8 | Dark | Down | 37.7 | 159.1 | Up | 06:44:59 - 07:09:17 | -3549 |
| Lake Havasu City | 06:57:07 | -31.2 | Dark | Down | 38.1 | 159.3 | Up | 06:44:58 - 07:09:16 | -3577 |
| Parker | 06:57:08 | -31.6 | Dark | Down | 38.5 | 159.2 | Up | 06:44:59 - 07:09:17 | -3603 |
| Wildwood | 06:57:23 | -30.8 | Dark | Down | 37.1 | 154.3 | Up | 06:45:14 - 07:09:32 | -3618 |
| George/Scottsdale | 06:56:59 | -32.4 | Dark | Down | 39.5 | 162.0 | Up | 06:44:50 - 07:09:08 | -3630 |
| Idyllwild | 06:57:17 | -31.5 | Dark | Down | 38.1 | 156.3 | Up | 06:45:08 - 07:09:26 | -3637 |
| Blythe | 06:57:09 | -32.1 | Dark | Down | 38.9 | 158.7 | Up | 06:45:00 - 07:09:18 | -3642 |
| Calipatria | 06:57:13 | -32.4 | Dark | Down | 39.0 | 157.5 | Up | 06:45:04 - 07:09:22 | -3680 |
| Yuma | 06:57:10 | -33.0 | Dark | Down | 39.7 | 158.4 | Up | 06:45:01 - 07:09:19 | -3710 |
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, (2025/06/25 06:56UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 32.86 158 Nunki 18:55:15.9 -26:17:49 2.0 11.85 169 PPM 234707 18:33:39.1 -14:51:14 6.1 1.89 165 PPM 234902 18:41:42.5 -14:33:51 6.6 0.33 164 PPM 234882 18:40:59.1 -14:53:21 8.9 0.12 165 50000 18:41:28.6 -14:53:33 14.9 165 Positions are for J2000
Event circumstances last updated at 2021/03/08 02:04:11 UT
Marc W. Buie, Southwest Research Institute