Event between (577578) 13GW136 and star GA0700:06508738 with event index number of 2549307
Geocentric closest approach at 2026/04/09 08:25:48 UTC
J2000 position of star is 16:31:21.7 -18:36:12
Equinox of date position of star is 16:32:38.7 -18:38:58
Stellar brightness G=16.4,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 32 degrees from the moon.
Moon is 58% illuminated.
TNO apparent brightness V=22.7
[RECON map]
TNO is 31.4 AU from the Sun
and 30.7 AU from the Earth.
The TNO is moving 12.8
km/sec on the sky relative to the star, or,
2.1 arcsec/hr.
The 1-sigma error in the time of the event is 817 seconds.
The 1-sigma cross-track error in the shadow position is
2002 km.
The sky-plane scale is
22280.2 km/arcsec.
The TNO has an absolute magnitude Hv=7.6
Diameter=182.8 km assuming a 5% albedo -- 14.3 sec chord
Diameter=74.6 km assuming a 30% albedo -- 5.8 sec chord
Dynamical classification is 2:1E
Star training set for 577578, (2026/04/09 08:26UT) Object RA Dec mag sep mel Antares 16:31:01.4 -26:29:17 0.9 7.84 30 8Bet1Sco 16:06:58.1 -19:52:31 2.6 6.24 37 7Chi Oph 16:28:33.0 -18:30:49 4.1 1.04 33 PPM 231759 16:31:15.2 -18:44:17 8.1 0.40 32 PPM 231792 16:32:35.1 -18:40:34 9.8 0.07 32 577578 16:32:53.5 -18:39:29 16.4 32 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
1.1 sigma about the mid-time.
The median site spacing is 10.5 km
RECON observability=0.4 and success probability=0.4%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Sleaford | 08:30:19 | -27.6 | Dark | Down | 15.1 | 152.0 | Really Low | 08:15:19 - 08:45:19 | 8578 |
| Kamloops | 08:31:18 | -31.4 | Dark | Down | 11.2 | 139.0 | Really Low | 08:16:18 - 08:46:18 | 8086 |
| Kelowna | 08:31:16 | -32.1 | Dark | Down | 12.2 | 139.7 | Really Low | 08:16:16 - 08:46:16 | 8062 |
| Peachland | 08:31:17 | -32.2 | Dark | Down | 12.1 | 139.4 | Really Low | 08:16:17 - 08:46:17 | 8046 |
| Summerland | 08:31:19 | -32.4 | Dark | Down | 12.3 | 139.5 | Really Low | 08:16:19 - 08:46:19 | 8040 |
| Penticton | 08:31:19 | -32.4 | Dark | Down | 12.4 | 139.5 | Really Low | 08:16:19 - 08:46:19 | 8039 |
| Oliver | 08:31:16 | -32.8 | Dark | Down | 12.7 | 139.5 | Really Low | 08:16:16 - 08:46:16 | 8017 |
| Anarchist Mountain Observatory | 08:31:19 | -32.9 | Dark | Down | 12.9 | 139.6 | Really Low | 08:16:19 - 08:46:19 | 8013 |
| Tonasket | 08:31:19 | -33.2 | Dark | Down | 13.1 | 139.5 | Really Low | 08:16:19 - 08:46:19 | 7990 |
| Okanogan | 08:31:23 | -33.6 | Dark | Down | 13.3 | 139.4 | Really Low | 08:16:23 - 08:46:23 | 7964 |
| Brewster | 08:31:20 | -33.9 | Dark | Down | 13.4 | 139.1 | Really Low | 08:16:20 - 08:46:20 | 7940 |
| Manson/Chelan | 08:31:24 | -34.1 | Dark | Down | 13.4 | 138.8 | Really Low | 08:16:24 - 08:46:24 | 7915 |
| Dunrhomin | 08:30:34 | -38.0 | Dark | Up | 25.7 | 150.7 | Low | 08:15:34 - 08:45:34 | 7902 |
| Wenatchee | 08:31:27 | -34.6 | Dark | Down | 13.7 | 138.6 | Really Low | 08:16:27 - 08:46:27 | 7879 |
| Victoria | 08:31:34 | -33.7 | Dark | Down | 11.5 | 136.1 | Really Low | 08:16:34 - 08:46:34 | 7856 |
| Ellensburg | 08:31:30 | -35.0 | Dark | Down | 13.9 | 138.3 | Really Low | 08:16:30 - 08:46:30 | 7845 |
| PNWRO | 08:31:25 | -35.8 | Dark | Down | 15.4 | 139.6 | Really Low | 08:16:25 - 08:46:25 | 7831 |
| Yakima | 08:31:30 | -35.4 | Dark | Down | 14.2 | 138.3 | Really Low | 08:16:30 - 08:46:30 | 7817 |
| Toppenish/White Swan | 08:31:28 | -35.6 | Dark | Down | 14.4 | 138.4 | Really Low | 08:16:28 - 08:46:28 | 7808 |
| Goldendale | 08:31:31 | -36.2 | Dark | Down | 14.6 | 137.9 | Really Low | 08:16:31 - 08:46:31 | 7757 |
| The Dalles | 08:31:34 | -36.5 | Dark | Down | 14.6 | 137.6 | Really Low | 08:16:34 - 08:46:34 | 7729 |
| Maupin | 08:31:36 | -36.9 | Dark | Down | 15.0 | 137.6 | Really Low | 08:16:36 - 08:46:36 | 7704 |
| Sisters | 08:31:39 | -37.8 | Dark | Down | 15.4 | 137.0 | Really Low | 08:16:39 - 08:46:39 | 7626 |
| Bend | 08:31:40 | -38.0 | Dark | Down | 15.7 | 137.2 | Really Low | 08:16:40 - 08:46:40 | 7618 |
| Oregon Observatory | 08:31:41 | -38.2 | Dark | Down | 15.8 | 137.1 | Really Low | 08:16:41 - 08:46:41 | 7601 |
| North Lake | 08:31:39 | -38.8 | Dark | Down | 16.5 | 137.4 | Really Low | 08:16:39 - 08:46:39 | 7574 |
| Lakeview | 08:31:41 | -39.8 | Dark | Down | 17.6 | 137.6 | Really Low | 08:16:41 - 08:46:41 | 7517 |
| Chiloquin | 08:31:47 | -39.5 | Dark | Down | 16.6 | 136.5 | Really Low | 08:16:47 - 08:46:47 | 7493 |
| Cedarville | 08:31:42 | -40.4 | Dark | Down | 18.2 | 137.7 | Really Low | 08:16:42 - 08:46:42 | 7475 |
| Klamath Falls | 08:31:47 | -39.9 | Dark | Down | 16.8 | 136.5 | Really Low | 08:16:47 - 08:46:47 | 7470 |
| Fall River/Burney | 08:31:48 | -41.0 | Dark | Down | 17.9 | 136.5 | Really Low | 08:16:48 - 08:46:48 | 7397 |
| Susanville | 08:31:47 | -41.5 | Dark | Down | 18.7 | 137.0 | Really Low | 08:16:47 - 08:46:47 | 7376 |
| Gimple | 08:31:48 | -41.8 | Dark | Down | 18.8 | 136.8 | Really Low | 08:16:48 - 08:46:48 | 7347 |
| Greenville | 08:31:48 | -41.8 | Dark | Down | 18.8 | 136.7 | Really Low | 08:16:48 - 08:46:48 | 7345 |
| Reno | 08:31:44 | -42.3 | Dark | Down | 19.8 | 137.5 | Really Low | 08:16:44 - 08:46:44 | 7340 |
| Portola | 08:31:47 | -42.1 | Dark | Down | 19.3 | 137.0 | Really Low | 08:16:47 - 08:46:47 | 7337 |
| Quincy | 08:31:48 | -42.0 | Dark | Down | 18.9 | 136.7 | Really Low | 08:16:48 - 08:46:48 | 7329 |
| Tonopah | 08:31:34 | -43.3 | Dark | Down | 22.3 | 139.3 | Low | 08:16:34 - 08:46:34 | 7322 |
| Yerington | 08:31:42 | -42.7 | Dark | Down | 20.6 | 137.9 | Low | 08:16:42 - 08:46:42 | 7322 |
| Carson City | 08:31:45 | -42.6 | Dark | Down | 20.1 | 137.4 | Low | 08:16:45 - 08:46:45 | 7314 |
| Hawthorne | 08:31:41 | -43.1 | Dark | Down | 21.2 | 138.2 | Low | 08:16:41 - 08:46:41 | 7306 |
| Gardnerville | 08:31:45 | -42.9 | Dark | Down | 20.3 | 137.4 | Low | 08:16:45 - 08:46:45 | 7297 |
| Indian Springs | 08:31:29 | -44.4 | Dark | Down | 24.2 | 140.2 | Low | 08:16:29 - 08:46:29 | 7265 |
| Beatty | 08:31:35 | -44.3 | Dark | Down | 23.4 | 139.4 | Low | 08:16:35 - 08:46:35 | 7250 |
| Henderson | 08:31:28 | -44.8 | Dark | Down | 24.9 | 140.6 | Low | 08:16:28 - 08:46:28 | 7249 |
| Lee Vining | 08:31:44 | -43.7 | Dark | Down | 21.3 | 137.7 | Low | 08:16:44 - 08:46:44 | 7245 |
| Patrick | 08:31:23 | -45.1 | Dark | Down | 26.0 | 141.4 | Low | 08:16:23 - 08:46:23 | 7243 |
| Bishop | 08:31:41 | -44.2 | Dark | Down | 22.2 | 138.1 | Low | 08:16:41 - 08:46:41 | 7226 |
| Kingman/Dolan Springs | 08:31:25 | -45.4 | Dark | Down | 26.1 | 141.2 | Low | 08:16:25 - 08:46:25 | 7219 |
| Laughlin/Bullhead City | 08:31:25 | -45.5 | Dark | Down | 25.8 | 140.7 | Low | 08:16:25 - 08:46:25 | 7197 |
| George/Scottsdale | 08:31:16 | -46.1 | Dark | Up | 28.3 | 142.7 | Low | 08:16:16 - 08:46:16 | 7186 |
| Mohave Valley | 08:31:28 | -45.8 | Dark | Down | 26.0 | 140.7 | Low | 08:16:28 - 08:46:28 | 7176 |
| Lake Havasu City | 08:31:25 | -46.1 | Dark | Down | 26.5 | 140.8 | Low | 08:16:25 - 08:46:25 | 7154 |
| Parker | 08:31:26 | -46.4 | Dark | Down | 26.8 | 140.7 | Low | 08:16:26 - 08:46:26 | 7127 |
| Idyllwild | 08:31:40 | -47.4 | Dark | Down | 25.8 | 138.5 | Low | 08:16:40 - 08:46:40 | 7003 |
| Calipatria | 08:31:34 | -47.7 | Dark | Down | 26.9 | 139.3 | Low | 08:16:34 - 08:46:34 | 6999 |
| Yuma | 08:31:30 | -47.9 | Dark | Down | 27.7 | 139.9 | Low | 08:16:30 - 08:46:30 | 6999 |
| Wildwood | 08:31:48 | -47.4 | Dark | Down | 24.5 | 137.0 | Low | 08:16:48 - 08:46:48 | 6959 |
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 577578, (2026/04/09 08:26UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 7.84 30 8Bet1Sco 16:05:26.2 -19:48:20 2.6 6.24 37 7Chi Oph 16:27:01.4 -18:27:23 4.1 1.04 33 PPM 231759 16:29:43.4 -18:40:56 8.1 0.40 32 PPM 231792 16:31:03.3 -18:37:16 9.8 0.07 32 577578 16:31:21.7 -18:36:12 16.4 32 Positions are for J2000
Event circumstances last updated at 2022/01/12 00:29:16 UT
Marc W. Buie, Southwest Research Institute