Event between (415720) 99RU215 and star GA1120:00365624 with event index number of 1506062
Geocentric closest approach at 2025/10/11 11:11:25 UTC
J2000 position of star is 03:08:39.8 +22:27:48
Equinox of date position of star is 03:09:46.8 +22:32:09
Stellar brightness G=14.7,
use SENSEUP=128
Star is 27 degrees from the moon.
Moon is 75% illuminated.
TNO apparent brightness V=23.6
[RECON map]
TNO is 41.7 AU from the Sun
and 40.8 AU from the Earth.
The TNO is moving 20.7
km/sec on the sky relative to the star, or,
2.5 arcsec/hr.
The 1-sigma error in the time of the event is 455 seconds.
The 1-sigma cross-track error in the shadow position is
4095 km.
The sky-plane scale is
29613.5 km/arcsec.
The TNO has an absolute magnitude Hv=7.3
Diameter=208.9 km assuming a 5% albedo -- 10.1 sec chord
Diameter=85.3 km assuming a 30% albedo -- 4.1 sec chord
Dynamical classification is CLASSICAL
Star training set for 415720, (2025/10/11 11:11UT) Object RA Dec mag sep mel Aldebaran 04:37:24.1 +16:33:33 0.8 21.38 14 44Zet Per 03:55:45.5 +31:57:29 2.8 13.80 16 58Zet Ari 03:16:23.3 +21:08:18 4.9 2.03 26 PPM 092277 03:12:49.2 +22:15:59 8.0 0.68 27 PPM 092229 03:09:38.3 +22:45:25 9.6 0.23 27 415720 03:10:09.6 +22:33:38 14.7 27 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
2.0 sigma about the mid-time.
The median site spacing is 23.1 km
RECON observability=1.0 and success probability=6.4%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Kelowna | 11:09:49 | -29.7 | Dark | Up | 57.9 | 219.0 | Up | 10:54:49 - 11:24:49 | -5834 |
| Summerland | 11:09:49 | -29.9 | Dark | Up | 58.3 | 218.8 | Up | 10:54:49 - 11:24:49 | -5863 |
| Penticton | 11:09:48 | -29.9 | Dark | Up | 58.3 | 219.1 | Up | 10:54:48 - 11:24:48 | -5870 |
| Okanagan Falls | 11:09:49 | -30.0 | Dark | Up | 58.4 | 219.2 | Up | 10:54:49 - 11:24:49 | -5889 |
| Oliver | 11:09:49 | -30.1 | Dark | Up | 58.5 | 219.4 | Up | 10:54:49 - 11:24:49 | -5906 |
| Anarchist Mountain Observatory | 11:09:48 | -30.0 | Dark | Up | 58.6 | 219.9 | Up | 10:54:48 - 11:24:48 | -5924 |
| Oroville | 11:09:48 | -30.1 | Dark | Up | 58.7 | 219.9 | Up | 10:54:48 - 11:24:48 | -5931 |
| Tonasket | 11:09:48 | -30.2 | Dark | Up | 58.9 | 220.1 | Up | 10:54:48 - 11:24:48 | -5955 |
| Okanogan | 11:09:48 | -30.5 | Dark | Up | 59.2 | 220.3 | Up | 10:54:48 - 11:24:48 | -5989 |
| Brewster | 11:09:49 | -30.7 | Dark | Up | 59.5 | 220.2 | Up | 10:54:49 - 11:24:49 | -6016 |
| Manson/Chelan | 11:09:50 | -31.0 | Dark | Up | 59.8 | 219.9 | Up | 10:54:50 - 11:24:50 | -6036 |
| Entiat | 11:09:50 | -31.1 | Dark | Up | 60.0 | 220.0 | Up | 10:54:50 - 11:24:50 | -6058 |
| Wenatchee | 11:09:50 | -31.3 | Dark | Up | 60.2 | 220.1 | Up | 10:54:50 - 11:24:50 | -6084 |
| Ellensburg | 11:09:51 | -31.6 | Dark | Up | 60.6 | 220.2 | Up | 10:54:51 - 11:24:51 | -6126 |
| Yakima | 11:09:51 | -31.8 | Dark | Up | 61.0 | 220.7 | Up | 10:54:51 - 11:24:51 | -6167 |
| Toppenish/White Swan | 11:09:50 | -31.8 | Dark | Up | 61.0 | 221.2 | Up | 10:54:50 - 11:24:50 | -6190 |
| Pasco | 11:09:45 | -31.1 | Dark | Up | 60.6 | 223.4 | Up | 10:54:45 - 11:24:45 | -6207 |
| PNWRO | 11:09:45 | -31.0 | Dark | Up | 60.6 | 224.1 | Up | 10:54:45 - 11:24:45 | -6233 |
| George/Umatilla | 11:09:46 | -31.4 | Dark | Up | 60.9 | 223.5 | Up | 10:54:46 - 11:24:46 | -6241 |
| Goldendale | 11:09:51 | -32.3 | Dark | Up | 61.7 | 221.2 | Up | 10:54:51 - 11:24:51 | -6246 |
| The Dalles | 11:09:53 | -32.6 | Dark | Up | 62.0 | 220.8 | Up | 10:54:53 - 11:24:53 | -6268 |
| Maupin | 11:09:52 | -32.8 | Dark | Up | 62.3 | 221.5 | Up | 10:54:52 - 11:24:52 | -6311 |
| Madras/Culver | 11:09:52 | -33.0 | Dark | Up | 62.7 | 222.2 | Up | 10:54:52 - 11:24:52 | -6368 |
| Sisters | 11:09:54 | -33.5 | Dark | Up | 63.1 | 221.8 | Up | 10:54:54 - 11:24:54 | -6401 |
| Redmond | 11:09:52 | -33.2 | Dark | Up | 63.0 | 222.5 | Up | 10:54:52 - 11:24:52 | -6405 |
| Bend | 11:09:53 | -33.4 | Dark | Up | 63.2 | 222.6 | Up | 10:54:53 - 11:24:53 | -6427 |
| Oregon Observatory | 11:09:53 | -33.6 | Dark | Up | 63.4 | 222.6 | Up | 10:54:53 - 11:24:53 | -6445 |
| La Pine/Gilchrist | 11:09:53 | -33.7 | Dark | Up | 63.6 | 222.8 | Up | 10:54:53 - 11:24:53 | -6466 |
| North Lake | 11:09:51 | -33.5 | Dark | Up | 63.6 | 224.4 | Up | 10:54:51 - 11:24:51 | -6514 |
| Paisley | 11:09:49 | -33.5 | Dark | Up | 63.8 | 225.8 | Up | 10:54:49 - 11:24:49 | -6574 |
| Chiloquin | 11:09:54 | -34.4 | Dark | Up | 64.6 | 223.7 | Up | 10:54:54 - 11:24:54 | -6582 |
| Klamath Falls | 11:09:54 | -34.5 | Dark | Up | 64.8 | 224.4 | Up | 10:54:54 - 11:24:54 | -6618 |
| Lakeview | 11:09:49 | -33.5 | Dark | Up | 64.0 | 226.9 | Up | 10:54:49 - 11:24:49 | -6628 |
| Tulelake | 11:09:52 | -34.4 | Dark | Up | 64.8 | 225.3 | Up | 10:54:52 - 11:24:52 | -6648 |
| Cedarville | 11:09:48 | -33.7 | Dark | Up | 64.4 | 228.2 | Up | 10:54:48 - 11:24:48 | -6699 |
| Fall River/Burney | 11:09:52 | -34.7 | Dark | Up | 65.4 | 226.8 | Up | 10:54:52 - 11:24:52 | -6745 |
| Susanville | 11:09:49 | -34.4 | Dark | Up | 65.4 | 229.2 | Up | 10:54:49 - 11:24:49 | -6815 |
| Niwot | 11:08:53 | -23.4 | Dark | Up | 55.5 | 249.9 | Up | 10:53:53 - 11:23:53 | -6839 |
| Greenville | 11:09:50 | -34.8 | Dark | Up | 65.7 | 229.1 | Up | 10:54:50 - 11:24:50 | -6843 |
| Gimple | 11:09:50 | -34.7 | Dark | Up | 65.7 | 229.3 | Up | 10:54:50 - 11:24:50 | -6844 |
| SwRI | 11:08:53 | -23.5 | Dark | Up | 55.6 | 250.0 | Up | 10:53:53 - 11:23:53 | -6850 |
| Quincy | 11:09:50 | -34.8 | Dark | Up | 65.9 | 229.4 | Up | 10:54:50 - 11:24:50 | -6865 |
| Portola | 11:09:48 | -34.5 | Dark | Up | 65.7 | 230.5 | Up | 10:54:48 - 11:24:48 | -6881 |
| Reno | 11:09:46 | -34.2 | Dark | Up | 65.5 | 232.0 | Up | 10:54:46 - 11:24:46 | -6912 |
| Carson City | 11:09:45 | -34.3 | Dark | Up | 65.7 | 232.7 | Up | 10:54:45 - 11:24:45 | -6950 |
| Yerington | 11:09:43 | -33.9 | Dark | Up | 65.4 | 234.1 | Up | 10:54:43 - 11:24:43 | -6973 |
| Gardnerville | 11:09:45 | -34.4 | Dark | Up | 65.8 | 233.2 | Up | 10:54:45 - 11:24:45 | -6977 |
| Hawthorne | 11:09:41 | -33.7 | Dark | Up | 65.3 | 235.7 | Up | 10:54:41 - 11:24:41 | -7025 |
| Tonopah | 11:09:35 | -32.8 | Dark | Up | 64.7 | 238.7 | Up | 10:54:35 - 11:24:35 | -7079 |
| Lee Vining | 11:09:42 | -34.2 | Dark | Up | 66.0 | 236.0 | Up | 10:54:42 - 11:24:42 | -7084 |
| Bishop | 11:09:40 | -33.9 | Dark | Up | 65.8 | 238.2 | Up | 10:54:40 - 11:24:40 | -7151 |
| Beatty | 11:09:33 | -32.8 | Dark | Up | 64.9 | 241.5 | Up | 10:54:33 - 11:24:33 | -7205 |
| Lone Pine | 11:09:38 | -33.9 | Dark | Up | 66.0 | 240.2 | Up | 10:54:38 - 11:24:38 | -7235 |
| Indian Springs | 11:09:29 | -32.1 | Dark | Up | 64.3 | 243.6 | Up | 10:54:29 - 11:24:29 | -7242 |
| Henderson | 11:09:26 | -31.7 | Dark | Up | 64.1 | 245.5 | Up | 10:54:26 - 11:24:26 | -7301 |
| Searchlight/Boulder City | 11:09:25 | -31.8 | Dark | Up | 64.2 | 246.6 | Up | 10:54:25 - 11:24:25 | -7364 |
| CPSLO | 11:09:49 | -36.3 | Dark | Up | 68.4 | 238.9 | Up | 10:54:49 - 11:24:49 | -7367 |
| Patrick | 11:09:21 | -31.0 | Dark | Up | 63.5 | 248.0 | Up | 10:54:21 - 11:24:21 | -7370 |
| Kingman/Dolan Springs | 11:09:22 | -31.2 | Dark | Up | 63.7 | 248.2 | Up | 10:54:22 - 11:24:22 | -7394 |
| Laughlin/Bullhead City | 11:09:23 | -31.6 | Dark | Up | 64.1 | 247.6 | Up | 10:54:23 - 11:24:23 | -7396 |
| DCO | 11:09:18 | -30.5 | Dark | Up | 63.1 | 249.4 | Up | 10:54:18 - 11:24:18 | -7403 |
| Mohave Valley | 11:09:24 | -31.7 | Dark | Up | 64.2 | 248.1 | Up | 10:54:24 - 11:24:24 | -7426 |
| Lake Havasu City | 11:09:23 | -31.6 | Dark | Up | 64.2 | 249.2 | Up | 10:54:23 - 11:24:23 | -7470 |
| Wildwood | 11:09:39 | -35.1 | Dark | Up | 67.5 | 244.6 | Up | 10:54:39 - 11:24:39 | -7507 |
| Parker | 11:09:23 | -31.7 | Dark | Up | 64.3 | 249.9 | Up | 10:54:23 - 11:24:23 | -7508 |
| Idyllwild | 11:09:31 | -33.7 | Dark | Up | 66.3 | 247.8 | Up | 10:54:31 - 11:24:31 | -7551 |
| Blythe | 11:09:23 | -32.0 | Dark | Up | 64.7 | 250.6 | Up | 10:54:23 - 11:24:23 | -7566 |
| Calipatria | 11:09:27 | -32.9 | Dark | Up | 65.6 | 250.5 | Up | 10:54:27 - 11:24:27 | -7619 |
| Yuma | 11:09:23 | -32.3 | Dark | Up | 65.0 | 252.4 | Up | 10:54:23 - 11:24:23 | -7667 |
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 415720, (2025/10/11 11:11UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:30 0.8 21.38 14 44Zet Per 03:54:07.9 +31:53:01 2.8 13.80 16 58Zet Ari 03:14:54.1 +21:02:39 4.9 2.03 26 PPM 092277 03:11:19.5 +22:10:14 8.0 0.68 27 PPM 092229 03:08:08.5 +22:39:34 9.6 0.23 27 415720 03:08:39.8 +22:27:48 14.7 27 Positions are for J2000
Event circumstances last updated at 2019/03/25 00:14:07 UT
Marc W. Buie, Southwest Research Institute