Event between (16684) 94JQ1 and star GA0640:08140618 with event index number of 1643692
Geocentric closest approach at 2026/05/20 06:35:06 UTC
J2000 position of star is 16:39:50.0 -24:56:39
Equinox of date position of star is 16:41:19.4 -24:59:25
Stellar brightness G=16.7,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 144 degrees from the moon.
Moon is 17% illuminated.
Apparent brightness V=22.9
[RECON map]
Object is 42.1 AU from the Sun
and 41.1 AU from the Earth.
Apparent velocity is 23.9
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 466 seconds.
The 1-sigma cross-track error in the shadow position is
2839 km.
The sky-plane scale is
29796.9 km/arcsec.
The object has an absolute magnitude Hv=6.7
Diameter=270.4 km assuming a 5% albedo -- 11.5 sec chord
Diameter=110.4 km assuming a 30% albedo -- 4.7 sec chord
Dynamical classification is CLASSICAL
Star training set for 16684, (2026/05/20 06:35UT) Object RA Dec mag sep mel Antares 16:31:01.8 -26:29:17 0.9 2.78 142 23Tau Sco 16:37:31.8 -28:16:06 2.8 3.39 144 22 Sco 16:31:48.9 -25:10:16 4.5 2.19 142 PPM 265814 16:43:45.7 -24:52:03 8.4 0.54 145 PPM 265776 16:41:17.6 -25:03:30 9.4 0.07 144 16684 16:41:26.5 -24:59:38 16.7 144 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
1.9 sigma about the mid-time.
The median site spacing is 14.6 km
RECON observability=0.3 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 | 06:36:26 | -17.7 | AT | Up | 11.2 | 162.6 | Really Low | 06:21:26 - 06:51:26 | 6130 |
| Kamloops | 06:36:54 | -17.1 | AT | Up | 8.9 | 149.9 | Really Low | 06:21:54 - 06:51:54 | 5804 |
| Kelowna | 06:36:54 | -18.1 | Dark | Up | 9.9 | 150.6 | Really Low | 06:21:54 - 06:51:54 | 5792 |
| Peachland | 06:36:54 | -18.1 | Dark | Up | 9.9 | 150.3 | Really Low | 06:21:54 - 06:51:54 | 5782 |
| Summerland | 06:36:54 | -18.3 | Dark | Up | 10.1 | 150.4 | Really Low | 06:21:54 - 06:51:54 | 5778 |
| Penticton | 06:36:54 | -18.4 | Dark | Up | 10.2 | 150.5 | Really Low | 06:21:54 - 06:51:54 | 5778 |
| Oliver | 06:36:54 | -18.7 | Dark | Up | 10.5 | 150.4 | Really Low | 06:21:54 - 06:51:54 | 5764 |
| Anarchist Mountain Observatory | 06:36:54 | -18.9 | Dark | Up | 10.7 | 150.6 | Really Low | 06:21:54 - 06:51:54 | 5762 |
| Okanogan | 06:36:54 | -19.5 | Dark | Up | 11.2 | 150.3 | Really Low | 06:21:54 - 06:51:54 | 5732 |
| Brewster | 06:36:54 | -19.7 | Dark | Up | 11.3 | 150.1 | Really Low | 06:21:54 - 06:51:54 | 5717 |
| Manson/Chelan | 06:37:09 | -19.8 | Dark | Up | 11.4 | 149.8 | Really Low | 06:22:09 - 06:52:09 | 5689 |
| Dunrhomin | 06:36:35 | -29.6 | Dark | Down | 22.7 | 162.3 | Low | 06:21:35 - 06:51:35 | 5669 |
| Wenatchee | 06:37:09 | -20.2 | Dark | Up | 11.8 | 149.7 | Really Low | 06:22:09 - 06:52:09 | 5664 |
| Nikitin | 06:36:35 | -29.7 | Dark | Down | 22.8 | 162.2 | Low | 06:21:35 - 06:51:35 | 5660 |
| CU-SBO | 06:36:35 | -29.8 | Dark | Down | 22.9 | 162.2 | Low | 06:21:35 - 06:51:35 | 5655 |
| PNWRO | 06:36:54 | -21.8 | Dark | Up | 13.4 | 150.7 | Really Low | 06:21:54 - 06:51:54 | 5648 |
| Ellensburg | 06:37:11 | -20.5 | Dark | Up | 12.0 | 149.4 | Really Low | 06:22:11 - 06:52:11 | 5640 |
| Victoria | 06:37:16 | -18.4 | Dark | Up | 9.7 | 147.2 | Really Low | 06:22:16 - 06:52:16 | 5637 |
| Yakima | 06:37:12 | -20.9 | Dark | Up | 12.4 | 149.4 | Really Low | 06:22:12 - 06:52:12 | 5622 |
| Toppenish/White Swan | 06:37:12 | -21.2 | Dark | Up | 12.6 | 149.5 | Really Low | 06:22:12 - 06:52:12 | 5616 |
| The Dalles | 06:37:16 | -21.7 | Dark | Up | 13.0 | 148.7 | Really Low | 06:22:16 - 06:52:16 | 5560 |
| Maupin | 06:37:16 | -22.1 | Dark | Up | 13.4 | 148.8 | Really Low | 06:22:16 - 06:52:16 | 5543 |
| Sisters | 06:37:18 | -22.8 | Dark | Up | 14.0 | 148.3 | Really Low | 06:22:18 - 06:52:18 | 5488 |
| Bend | 06:37:18 | -23.1 | Dark | Up | 14.3 | 148.4 | Really Low | 06:22:18 - 06:52:18 | 5483 |
| Oregon Observatory | 06:37:18 | -23.2 | Dark | Up | 14.4 | 148.3 | Really Low | 06:22:18 - 06:52:18 | 5471 |
| Chiloquin | 06:37:22 | -24.3 | Dark | Up | 15.4 | 147.8 | Really Low | 06:22:22 - 06:52:22 | 5392 |
| Cedarville | 06:37:19 | -25.8 | Dark | Up | 16.9 | 149.1 | Really Low | 06:22:19 - 06:52:19 | 5382 |
| Klamath Falls | 06:37:22 | -24.7 | Dark | Up | 15.7 | 147.8 | Really Low | 06:22:22 - 06:52:22 | 5376 |
| Fall River/Burney | 06:37:23 | -25.9 | Dark | Up | 16.8 | 147.9 | Really Low | 06:22:23 - 06:52:23 | 5323 |
| Gimple | 06:37:22 | -26.9 | Dark | Up | 17.8 | 148.2 | Really Low | 06:22:22 - 06:52:22 | 5287 |
| Greenville | 06:37:23 | -26.8 | Dark | Up | 17.8 | 148.2 | Really Low | 06:22:23 - 06:52:23 | 5285 |
| Reno | 06:37:21 | -27.7 | Dark | Up | 18.7 | 149.0 | Really Low | 06:22:21 - 06:52:21 | 5283 |
| Portola | 06:37:22 | -27.3 | Dark | Up | 18.2 | 148.5 | Really Low | 06:22:22 - 06:52:22 | 5280 |
| Quincy | 06:37:23 | -27.0 | Dark | Up | 18.0 | 148.1 | Really Low | 06:22:23 - 06:52:23 | 5274 |
| Yerington | 06:37:19 | -28.4 | Dark | Up | 19.5 | 149.5 | Really Low | 06:22:19 - 06:52:19 | 5270 |
| Carson City | 06:37:21 | -28.0 | Dark | Up | 19.1 | 149.0 | Really Low | 06:22:21 - 06:52:21 | 5264 |
| Hawthorne | 06:37:19 | -29.0 | Dark | Up | 20.1 | 149.9 | Low | 06:22:19 - 06:52:19 | 5258 |
| Gardnerville | 06:37:21 | -28.3 | Dark | Up | 19.3 | 149.0 | Really Low | 06:22:21 - 06:52:21 | 5251 |
| Beatty | 06:37:15 | -31.0 | Dark | Up | 22.2 | 151.2 | Low | 06:22:15 - 06:52:15 | 5213 |
| Lee Vining | 06:37:21 | -29.4 | Dark | Up | 20.4 | 149.4 | Low | 06:22:21 - 06:52:21 | 5212 |
| Patrick | 06:36:54 | -33.1 | Dark | Down | 24.6 | 153.4 | Low | 06:21:54 - 06:51:54 | 5211 |
| Bishop | 06:37:19 | -30.1 | Dark | Up | 21.2 | 149.9 | Low | 06:22:19 - 06:52:19 | 5196 |
| Laughlin/Bullhead City | 06:37:10 | -33.2 | Dark | Down | 24.6 | 152.8 | Low | 06:22:10 - 06:52:10 | 5166 |
| George/Scottsdale | 06:36:54 | -35.1 | Dark | Down | 26.8 | 154.9 | Low | 06:21:54 - 06:51:54 | 5152 |
| Lake Havasu City | 06:36:54 | -33.9 | Dark | Down | 25.2 | 152.8 | Low | 06:21:54 - 06:51:54 | 5146 |
| Idyllwild | 06:37:18 | -34.0 | Dark | Down | 25.0 | 150.6 | Low | 06:22:18 - 06:52:18 | 5020 |
| Calipatria | 06:37:14 | -34.9 | Dark | Down | 26.0 | 151.5 | Low | 06:22:14 - 06:52:14 | 5012 |
| Yuma | 06:37:12 | -35.5 | Dark | Down | 26.7 | 152.2 | Low | 06:22:12 - 06:52:12 | 5009 |
| Wildwood | 06:37:23 | -33.1 | Dark | Up | 23.9 | 149.0 | Low | 06:22:23 - 06:52:23 | 4989 |
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 16684, (2026/05/20 06:35UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 2.78 142 23Tau Sco 16:35:52.9 -28:12:58 2.8 3.39 144 22 Sco 16:30:12.5 -25:06:55 4.5 2.19 142 PPM 265814 16:42:09.2 -24:49:09 8.4 0.54 145 PPM 265776 16:39:41.0 -25:00:31 9.4 0.07 144 16684 16:39:50.0 -24:56:39 16.7 144 Positions are for J2000
Event circumstances last updated at 2024/06/09 02:46:49 UT
Marc W. Buie, Southwest Research Institute