Event between (79983) 99DF9 and star GA0800:04235738 with event index number of 2400733
Geocentric closest approach at 2025/03/31 09:46:23 UTC
J2000 position of star is 12:29:05.9 -09:33:55
Equinox of date position of star is 12:30:20.9 -09:41:56
Stellar brightness G=16.0,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 152 degrees from the moon.
Moon is 6% illuminated.
Apparent brightness V=22.2
[RECON map]
Object is 40.9 AU from the Sun
and 39.9 AU from the Earth.
Apparent velocity is 25.0
km/sec on the sky relative to the star, or,
3.1 arcsec/hr.
The 1-sigma error in the time of the event is 77 seconds.
The 1-sigma cross-track error in the shadow position is
1741 km.
The sky-plane scale is
28950.1 km/arcsec.
The object has an absolute magnitude Hv=6.1
Diameter=361.4 km assuming a 5% albedo -- 14.6 sec chord
Diameter=147.5 km assuming a 30% albedo -- 6.0 sec chord
Dynamical classification is CLASSICAL
Star training set for 79983, (2025/03/31 09:46UT) Object RA Dec mag sep mel Spica 13:26:31.6 -11:17:32 1.0 13.89 165 4Gam Crv 12:17:06.5 -17:40:55 2.6 8.60 150 21 Vir 12:35:05.1 -09:35:27 5.6 1.16 153 PPM 195560 12:31:57.0 -09:57:49 7.9 0.46 152 PPM 195531 12:30:02.1 -09:42:24 9.6 0.09 152 79983 12:30:24.2 -09:42:17 16.0 152 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 12.0 km
RECON observability=1.0 and success probability=12.2%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Sleaford | 09:46:05 | -24.4 | Dark | Down | 18.5 | 224.5 | Really Low | 09:39:08 - 09:53:02 | 2278 |
| Kamloops | 09:46:33 | -30.9 | Dark | Down | 25.0 | 210.8 | Low | 09:39:36 - 09:53:30 | 2016 |
| Kelowna | 09:46:29 | -31.3 | Dark | Down | 25.4 | 211.9 | Low | 09:39:32 - 09:53:26 | 2001 |
| Peachland | 09:46:30 | -31.5 | Dark | Down | 25.6 | 211.6 | Low | 09:39:33 - 09:53:27 | 1991 |
| Summerland | 09:46:30 | -31.6 | Dark | Down | 25.7 | 211.7 | Low | 09:39:33 - 09:53:27 | 1987 |
| Penticton | 09:46:29 | -31.6 | Dark | Down | 25.7 | 211.8 | Low | 09:39:32 - 09:53:26 | 1986 |
| Oliver | 09:46:27 | -31.9 | Dark | Down | 26.0 | 211.9 | Low | 09:39:30 - 09:53:24 | 1972 |
| Anarchist Mountain Observatory | 09:46:27 | -32.0 | Dark | Down | 26.1 | 212.2 | Low | 09:39:30 - 09:53:24 | 1970 |
| Okanogan | 09:46:26 | -32.6 | Dark | Down | 26.7 | 212.1 | Low | 09:39:29 - 09:53:23 | 1938 |
| Brewster | 09:46:26 | -32.9 | Dark | Down | 27.0 | 212.0 | Low | 09:39:29 - 09:53:23 | 1923 |
| Manson/Chelan | 09:46:26 | -33.2 | Dark | Down | 27.4 | 211.6 | Low | 09:39:29 - 09:53:23 | 1907 |
| Wenatchee | 09:46:26 | -33.7 | Dark | Down | 27.8 | 211.6 | Low | 09:39:29 - 09:53:23 | 1884 |
| Victoria | 09:46:36 | -33.7 | Dark | Down | 27.9 | 208.1 | Low | 09:39:39 - 09:53:33 | 1872 |
| Ellensburg | 09:46:25 | -34.1 | Dark | Down | 28.3 | 211.5 | Low | 09:39:28 - 09:53:22 | 1861 |
| PNWRO | 09:46:18 | -34.4 | Dark | Down | 28.5 | 213.5 | Low | 09:39:21 - 09:53:15 | 1848 |
| Yakima | 09:46:24 | -34.5 | Dark | Down | 28.6 | 211.6 | Low | 09:39:27 - 09:53:21 | 1843 |
| Toppenish/White Swan | 09:46:23 | -34.6 | Dark | Down | 28.7 | 211.8 | Low | 09:39:26 - 09:53:20 | 1836 |
| Dunrhomin | 09:45:29 | -32.2 | Dark | Down | 26.3 | 228.6 | Low | 09:38:32 - 09:52:26 | 1799 |
| Nikitin | 09:45:28 | -32.3 | Dark | Down | 26.5 | 228.6 | Low | 09:38:31 - 09:52:25 | 1789 |
| CU-SBO | 09:45:28 | -32.4 | Dark | Down | 26.5 | 228.6 | Low | 09:38:31 - 09:52:25 | 1785 |
| The Dalles | 09:46:24 | -35.6 | Dark | Down | 29.7 | 211.2 | Low | 09:39:27 - 09:53:21 | 1784 |
| Maupin | 09:46:22 | -35.9 | Dark | Down | 30.0 | 211.4 | Up | 09:39:25 - 09:53:19 | 1767 |
| Sisters | 09:46:22 | -36.8 | Dark | Down | 30.9 | 211.2 | Up | 09:39:25 - 09:53:19 | 1715 |
| Bend | 09:46:21 | -36.9 | Dark | Down | 31.0 | 211.5 | Up | 09:39:24 - 09:53:18 | 1708 |
| Oregon Observatory | 09:46:20 | -37.1 | Dark | Down | 31.2 | 211.4 | Up | 09:39:23 - 09:53:17 | 1697 |
| Chiloquin | 09:46:19 | -38.4 | Dark | Down | 32.5 | 211.4 | Up | 09:39:22 - 09:53:16 | 1621 |
| Klamath Falls | 09:46:17 | -38.7 | Dark | Down | 32.8 | 211.6 | Up | 09:39:20 - 09:53:14 | 1605 |
| Cedarville | 09:46:12 | -38.7 | Dark | Down | 32.7 | 213.6 | Up | 09:39:15 - 09:53:09 | 1602 |
| Fall River/Burney | 09:46:14 | -39.6 | Dark | Down | 33.6 | 212.4 | Up | 09:39:17 - 09:53:11 | 1549 |
| Gimple | 09:46:10 | -40.1 | Dark | Down | 34.2 | 213.3 | Up | 09:39:13 - 09:53:07 | 1511 |
| Greenville | 09:46:10 | -40.1 | Dark | Down | 34.2 | 213.2 | Up | 09:39:13 - 09:53:07 | 1509 |
| Portola | 09:46:08 | -40.2 | Dark | Down | 34.3 | 213.8 | Up | 09:39:11 - 09:53:05 | 1501 |
| Reno | 09:46:06 | -40.2 | Dark | Down | 34.2 | 214.6 | Up | 09:39:09 - 09:53:03 | 1500 |
| Quincy | 09:46:10 | -40.3 | Dark | Down | 34.4 | 213.3 | Up | 09:39:13 - 09:53:07 | 1498 |
| Yerington | 09:46:03 | -40.3 | Dark | Down | 34.4 | 215.5 | Up | 09:39:06 - 09:53:00 | 1483 |
| Carson City | 09:46:05 | -40.4 | Dark | Down | 34.5 | 214.8 | Up | 09:39:08 - 09:53:02 | 1480 |
| Gardnerville | 09:46:04 | -40.6 | Dark | Down | 34.7 | 214.9 | Up | 09:39:07 - 09:53:01 | 1467 |
| Hawthorne | 09:46:01 | -40.5 | Dark | Down | 34.5 | 216.3 | Up | 09:39:04 - 09:52:58 | 1467 |
| Lee Vining | 09:46:00 | -41.2 | Dark | Down | 35.2 | 216.0 | Up | 09:39:03 - 09:52:57 | 1424 |
| Beatty | 09:45:50 | -40.9 | Dark | Down | 35.0 | 218.9 | Up | 09:38:53 - 09:52:47 | 1411 |
| Bishop | 09:45:57 | -41.3 | Dark | Down | 35.4 | 217.0 | Up | 09:39:00 - 09:52:54 | 1404 |
| Patrick | 09:45:39 | -40.5 | Dark | Down | 34.6 | 222.4 | Up | 09:38:42 - 09:52:36 | 1379 |
| Laughlin/Bullhead City | 09:45:41 | -41.0 | Dark | Down | 35.2 | 221.9 | Up | 09:38:44 - 09:52:38 | 1349 |
| Lake Havasu City | 09:45:38 | -41.4 | Dark | Down | 35.5 | 222.4 | Up | 09:38:41 - 09:52:35 | 1312 |
| George/Scottsdale | 09:45:28 | -40.5 | Dark | Down | 34.7 | 225.2 | Up | 09:38:31 - 09:52:25 | 1312 |
| Idyllwild | 09:45:43 | -43.3 | Dark | Down | 37.4 | 220.4 | Up | 09:38:46 - 09:52:40 | 1215 |
| Calipatria | 09:45:38 | -43.1 | Dark | Down | 37.2 | 221.9 | Up | 09:38:41 - 09:52:35 | 1199 |
| Wildwood | 09:45:50 | -44.0 | Dark | Down | 38.1 | 218.2 | Up | 09:38:53 - 09:52:47 | 1196 |
| Yuma | 09:45:34 | -42.9 | Dark | Down | 37.0 | 223.0 | Up | 09:38:37 - 09:52:31 | 1190 |
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 79983, (2025/03/31 09:46UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 13.89 165 4Gam Crv 12:15:48.1 -17:32:30 2.6 8.60 150 21 Vir 12:33:46.6 -09:27:07 5.6 1.16 153 PPM 195560 12:30:38.5 -09:49:28 7.9 0.46 152 PPM 195531 12:28:43.8 -09:34:02 9.6 0.09 152 79983 12:29:05.9 -09:33:55 16.0 152 Positions are for J2000
Event circumstances last updated at 2024/03/04 05:31:25 UT
Marc W. Buie, Southwest Research Institute