Event between 11MM4 and star GA1520:04528260 with event index number of 1467830
Geocentric closest approach at 2025/12/18 09:15:33 UTC
J2000 position of star is 08:43:58.2 +63:47:21
Equinox of date position of star is 08:45:36.6 +63:43:07
Stellar brightness G=14.6,
use SENSEUP=128
Star is 125 degrees from the moon.
Moon is 3% illuminated.
TNO apparent brightness V=23.4
[RECON map]
TNO is 23.6 AU from the Sun
and 22.9 AU from the Earth.
The TNO is moving 28.7
km/sec on the sky relative to the star, or,
6.2 arcsec/hr.
The 1-sigma error in the time of the event is 153 seconds.
The 1-sigma cross-track error in the shadow position is
4985 km.
The sky-plane scale is
16640.5 km/arcsec.
The TNO has an absolute magnitude Hv=9.5
Diameter=77.3 km assuming a 5% albedo -- 2.7 sec chord
Diameter=31.5 km assuming a 30% albedo -- 1.1 sec chord
Dynamical classification is CENTAURR
Star training set for 11MM4, (2025/12/18 09:16UT) Object RA Dec mag sep mel Deneb 20:42:19.1 +45:22:27 1.3 70.93 93 Dubhe 11:05:18.6 +61:36:37 1.8 15.91 109 4Pi 2UMa 08:42:27.4 +64:14:04 5.8 0.68 125 PPM 016722 08:43:51.9 +64:36:39 8.5 0.95 125 PPM 016749 08:46:51.9 +63:44:02 9.9 0.09 124 11MM4 08:46:10.9 +63:41:37 14.6 124 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 23.5 km
RECON observability=1.0 and success probability=8.7%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Kelowna | 09:16:04 | -59.0 | Dark | Down | 71.1 | 33.8 | Up | 09:02:51 - 09:29:16 | -1288 |
| Summerland | 09:16:04 | -59.4 | Dark | Down | 70.7 | 33.6 | Up | 09:02:51 - 09:29:16 | -1321 |
| Penticton | 09:16:04 | -59.4 | Dark | Down | 70.7 | 33.4 | Up | 09:02:52 - 09:29:17 | -1327 |
| Okanagan Falls | 09:16:04 | -59.6 | Dark | Down | 70.5 | 33.1 | Up | 09:02:51 - 09:29:16 | -1347 |
| Oliver | 09:16:04 | -59.7 | Dark | Down | 70.4 | 32.8 | Up | 09:02:51 - 09:29:16 | -1364 |
| Anarchist Mountain Observatory | 09:16:04 | -59.7 | Dark | Down | 70.3 | 32.4 | Up | 09:02:51 - 09:29:16 | -1381 |
| Oroville | 09:16:04 | -59.8 | Dark | Down | 70.2 | 32.3 | Up | 09:02:51 - 09:29:16 | -1389 |
| Tonasket | 09:16:03 | -60.0 | Dark | Down | 70.0 | 32.0 | Up | 09:02:51 - 09:29:16 | -1413 |
| Okanogan | 09:16:03 | -60.3 | Dark | Down | 69.7 | 31.6 | Up | 09:02:50 - 09:29:15 | -1450 |
| Brewster | 09:16:03 | -60.6 | Dark | Down | 69.4 | 31.4 | Up | 09:02:51 - 09:29:16 | -1480 |
| Manson/Chelan | 09:16:04 | -60.9 | Dark | Down | 69.1 | 31.4 | Up | 09:02:52 - 09:29:17 | -1505 |
| Entiat | 09:16:04 | -61.1 | Dark | Down | 68.9 | 31.2 | Up | 09:02:52 - 09:29:17 | -1529 |
| Wenatchee | 09:16:04 | -61.4 | Dark | Down | 68.6 | 30.9 | Up | 09:02:52 - 09:29:17 | -1556 |
| Ellensburg | 09:16:05 | -61.8 | Dark | Down | 68.2 | 30.5 | Up | 09:02:52 - 09:29:17 | -1601 |
| Yakima | 09:16:04 | -62.1 | Dark | Down | 67.8 | 30.0 | Up | 09:02:52 - 09:29:17 | -1643 |
| Pasco | 09:16:00 | -61.7 | Dark | Down | 68.0 | 28.5 | Up | 09:02:48 - 09:29:13 | -1664 |
| Toppenish/White Swan | 09:16:04 | -62.2 | Dark | Down | 67.7 | 29.6 | Up | 09:02:51 - 09:29:16 | -1664 |
| PNWRO | 09:16:00 | -61.8 | Dark | Down | 67.9 | 28.1 | Up | 09:02:47 - 09:29:12 | -1687 |
| George/Umatilla | 09:16:01 | -62.0 | Dark | Down | 67.7 | 28.3 | Up | 09:02:48 - 09:29:13 | -1701 |
| Goldendale | 09:16:04 | -62.8 | Dark | Down | 67.1 | 29.3 | Up | 09:02:52 - 09:29:17 | -1725 |
| The Dalles | 09:16:05 | -63.1 | Dark | Down | 66.8 | 29.3 | Up | 09:02:53 - 09:29:18 | -1751 |
| Maupin | 09:16:05 | -63.4 | Dark | Down | 66.4 | 28.8 | Up | 09:02:52 - 09:29:17 | -1793 |
| Madras/Culver | 09:16:05 | -63.8 | Dark | Down | 65.9 | 28.2 | Up | 09:02:52 - 09:29:17 | -1849 |
| Redmond | 09:16:04 | -64.1 | Dark | Down | 65.6 | 27.9 | Up | 09:02:52 - 09:29:17 | -1886 |
| Sisters | 09:16:06 | -64.3 | Dark | Down | 65.5 | 28.2 | Up | 09:02:53 - 09:29:18 | -1887 |
| Bend | 09:16:04 | -64.3 | Dark | Down | 65.4 | 27.7 | Up | 09:02:52 - 09:29:17 | -1909 |
| Oregon Observatory | 09:16:05 | -64.5 | Dark | Down | 65.2 | 27.7 | Up | 09:02:53 - 09:29:18 | -1928 |
| La Pine/Gilchrist | 09:16:05 | -64.7 | Dark | Down | 65.0 | 27.5 | Up | 09:02:52 - 09:29:17 | -1949 |
| North Lake | 09:16:03 | -64.7 | Dark | Down | 64.8 | 26.7 | Up | 09:02:51 - 09:29:16 | -1988 |
| Niwot | 09:15:17 | -56.5 | Dark | Down | 65.6 | 10.8 | Up | 09:02:04 - 09:28:29 | -1989 |
| SwRI | 09:15:17 | -56.7 | Dark | Down | 65.5 | 10.9 | Up | 09:02:04 - 09:28:29 | -2001 |
| Paisley | 09:16:02 | -64.9 | Dark | Down | 64.4 | 25.9 | Up | 09:02:50 - 09:29:15 | -2040 |
| Chiloquin | 09:16:05 | -65.7 | Dark | Down | 63.9 | 26.7 | Up | 09:02:53 - 09:29:18 | -2064 |
| Lakeview | 09:16:01 | -65.2 | Dark | Down | 64.0 | 25.3 | Up | 09:02:49 - 09:29:14 | -2089 |
| Klamath Falls | 09:16:05 | -65.9 | Dark | Down | 63.6 | 26.3 | Up | 09:02:53 - 09:29:18 | -2098 |
| Tulelake | 09:16:04 | -66.0 | Dark | Down | 63.4 | 25.9 | Up | 09:02:51 - 09:29:16 | -2122 |
| Cedarville | 09:16:00 | -65.5 | Dark | Down | 63.5 | 24.6 | Up | 09:02:48 - 09:29:13 | -2152 |
| Fall River/Burney | 09:16:02 | -66.5 | Dark | Down | 62.6 | 25.1 | Up | 09:02:50 - 09:29:15 | -2212 |
| Susanville | 09:16:01 | -66.5 | Dark | Down | 62.3 | 24.1 | Up | 09:02:48 - 09:29:13 | -2267 |
| Gimple | 09:16:00 | -66.9 | Dark | Down | 62.0 | 24.0 | Up | 09:02:48 - 09:29:13 | -2296 |
| Greenville | 09:16:01 | -66.9 | Dark | Down | 62.0 | 24.0 | Up | 09:02:49 - 09:29:14 | -2297 |
| Quincy | 09:16:01 | -67.0 | Dark | Down | 61.8 | 23.9 | Up | 09:02:48 - 09:29:13 | -2317 |
| Portola | 09:15:59 | -66.8 | Dark | Down | 61.8 | 23.5 | Up | 09:02:47 - 09:29:12 | -2325 |
| Reno | 09:15:58 | -66.6 | Dark | Down | 61.8 | 22.8 | Up | 09:02:45 - 09:29:10 | -2344 |
| Carson City | 09:15:57 | -66.8 | Dark | Down | 61.4 | 22.6 | Up | 09:02:44 - 09:29:09 | -2378 |
| Yerington | 09:15:55 | -66.5 | Dark | Down | 61.4 | 22.0 | Up | 09:02:43 - 09:29:08 | -2390 |
| Gardnerville | 09:15:57 | -66.9 | Dark | Down | 61.2 | 22.4 | Up | 09:02:44 - 09:29:09 | -2402 |
| Hawthorne | 09:15:53 | -66.5 | Dark | Down | 61.2 | 21.3 | Up | 09:02:40 - 09:29:05 | -2428 |
| Tonopah | 09:15:49 | -65.8 | Dark | Down | 61.1 | 20.0 | Up | 09:02:36 - 09:29:01 | -2454 |
| Lee Vining | 09:15:54 | -67.1 | Dark | Down | 60.5 | 21.3 | Up | 09:02:42 - 09:29:07 | -2489 |
| Bishop | 09:15:52 | -66.9 | Dark | Down | 60.1 | 20.4 | Up | 09:02:39 - 09:29:04 | -2537 |
| Beatty | 09:15:46 | -66.0 | Dark | Down | 60.1 | 19.0 | Up | 09:02:34 - 09:28:59 | -2557 |
| Indian Springs | 09:15:42 | -65.4 | Dark | Down | 60.1 | 18.1 | Up | 09:02:30 - 09:28:55 | -2570 |
| Lone Pine | 09:15:50 | -67.1 | Dark | Down | 59.5 | 19.8 | Up | 09:02:37 - 09:29:02 | -2604 |
| Henderson | 09:15:41 | -65.2 | Dark | Down | 59.8 | 17.3 | Up | 09:02:28 - 09:28:53 | -2608 |
| Patrick | 09:15:37 | -64.6 | Dark | Down | 59.4 | 16.2 | Up | 09:02:24 - 09:28:49 | -2645 |
| DCO | 09:15:34 | -64.1 | Dark | Down | 59.3 | 15.5 | Up | 09:02:22 - 09:28:47 | -2658 |
| Searchlight/Boulder City | 09:15:40 | -65.3 | Dark | Down | 59.2 | 17.0 | Up | 09:02:27 - 09:28:52 | -2660 |
| Kingman/Dolan Springs | 09:15:35 | -64.8 | Dark | Down | 59.2 | 16.2 | Up | 09:02:23 - 09:28:48 | -2669 |
| Laughlin/Bullhead City | 09:15:37 | -65.2 | Dark | Down | 59.0 | 16.6 | Up | 09:02:25 - 09:28:50 | -2681 |
| Mohave Valley | 09:15:38 | -65.3 | Dark | Down | 58.8 | 16.4 | Up | 09:02:25 - 09:28:50 | -2706 |
| Lake Havasu City | 09:15:37 | -65.2 | Dark | Down | 58.4 | 16.1 | Up | 09:02:25 - 09:28:50 | -2738 |
| CPSLO | 09:15:57 | -69.5 | Dark | Down | 57.6 | 20.7 | Up | 09:02:44 - 09:29:09 | -2758 |
| Parker | 09:15:37 | -65.3 | Dark | Down | 58.1 | 15.9 | Up | 09:02:24 - 09:28:49 | -2769 |
| Blythe | 09:15:37 | -65.7 | Dark | Down | 57.5 | 15.9 | Up | 09:02:25 - 09:28:50 | -2823 |
| Wildwood | 09:15:49 | -68.6 | Dark | Down | 57.0 | 18.8 | Up | 09:02:37 - 09:29:02 | -2845 |
| Idyllwild | 09:15:44 | -67.3 | Dark | Down | 57.1 | 17.4 | Up | 09:02:31 - 09:28:56 | -2850 |
| Calipatria | 09:15:39 | -66.6 | Dark | Down | 56.8 | 16.3 | Up | 09:02:27 - 09:28:52 | -2885 |
| Yuma | 09:15:35 | -66.0 | Dark | Down | 56.6 | 15.5 | Up | 09:02:23 - 09:28:48 | -2907 |
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 11MM4, (2025/12/18 09:16UT) Object RA Dec mag sep mel Deneb 20:41:25.9 +45:16:49 1.3 70.93 93 Dubhe 11:03:43.3 +61:45:02 1.8 15.91 109 4Pi 2UMa 08:40:12.7 +64:19:41 5.8 0.68 125 PPM 016722 08:41:36.5 +64:42:18 8.5 0.95 125 PPM 016749 08:44:39.3 +63:49:46 9.9 0.09 124 11MM4 08:43:58.2 +63:47:21 14.6 124 Positions are for J2000
Event circumstances last updated at 2019/03/23 22:57:22 UT
Marc W. Buie, Southwest Research Institute