Event between 99RW215 and star GA1120:00753684 with event index number of 1490706
Geocentric closest approach at 2025/09/03 10:31:49 UTC
J2000 position of star is 04:42:46.6 +22:44:07
Equinox of date position of star is 04:44:00.9 +22:46:22
Stellar brightness G=15.5,
use SENSEUP=128
Star is 145 degrees from the moon.
Moon is 79% illuminated.
TNO apparent brightness V=25.1
[RECON map]
TNO is 30.7 AU from the Sun
and 30.7 AU from the Earth.
The TNO is moving 6.0
km/sec on the sky relative to the star, or,
1.0 arcsec/hr.
The 1-sigma error in the time of the event is 8395 seconds.
The 1-sigma cross-track error in the shadow position is
3511 km.
The sky-plane scale is
22291.1 km/arcsec.
The TNO has an absolute magnitude Hv=10.0
Diameter=156.3 km assuming a 5% albedo -- 10.0 sec chord
Diameter=63.8 km assuming a 30% albedo -- 4.1 sec chord
Dynamical classification is 4:3E
Star training set for 99RW215, (2025/09/03 10:32UT) Object RA Dec mag sep mel Aldebaran 04:37:23.8 +16:33:32 0.8 6.43 141 3Iot Aur 04:58:40.2 +33:12:15 2.7 10.89 149 PPM 093742 04:47:15.7 +23:40:24 6.1 1.12 146 PPM 093707 04:43:44.8 +22:59:23 7.2 0.25 145 PPM 093716 04:44:16.4 +22:39:08 10.6 0.13 145 99RW215 04:44:19.1 +22:46:55 15.5 145 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
0.1 sigma about the mid-time.
The median site spacing is 23.6 km
RECON observability=1.0 and success probability=12.9%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Clarence Fulton | 10:23:03 | -24.2 | Dark | Down | 41.7 | 105.1 | Up | 10:08:03 - 10:38:03 | 2987 |
| Kelowna | 10:22:58 | -24.6 | Dark | Down | 41.7 | 104.6 | Up | 10:07:58 - 10:37:58 | 2957 |
| Peachland | 10:22:54 | -24.8 | Dark | Down | 41.5 | 104.3 | Up | 10:07:54 - 10:37:54 | 2954 |
| Summerland | 10:22:52 | -24.9 | Dark | Down | 41.6 | 104.2 | Up | 10:07:52 - 10:37:52 | 2939 |
| Victoria | 10:22:12 | -27.3 | Dark | Down | 39.3 | 99.9 | Up | 10:07:12 - 10:37:12 | 2934 |
| Penticton | 10:22:53 | -24.9 | Dark | Down | 41.7 | 104.2 | Up | 10:07:53 - 10:37:53 | 2931 |
| Oliver | 10:22:49 | -25.2 | Dark | Down | 41.7 | 103.9 | Up | 10:07:49 - 10:37:49 | 2900 |
| Anarchist Mountain Observatory | 10:22:48 | -25.2 | Dark | Down | 41.9 | 104.0 | Up | 10:07:48 - 10:37:48 | 2882 |
| Tonasket | 10:22:44 | -25.5 | Dark | Down | 41.9 | 103.6 | Up | 10:07:44 - 10:37:44 | 2856 |
| Okanogan | 10:22:39 | -25.8 | Dark | Down | 41.9 | 103.2 | Up | 10:07:39 - 10:37:39 | 2830 |
| Brewster | 10:22:35 | -26.1 | Dark | Down | 41.8 | 102.7 | Up | 10:07:35 - 10:37:35 | 2811 |
| Manson/Chelan | 10:22:29 | -26.4 | Dark | Down | 41.6 | 102.2 | Up | 10:07:29 - 10:37:29 | 2802 |
| Entiat | 10:22:26 | -26.7 | Dark | Down | 41.6 | 101.9 | Up | 10:07:26 - 10:37:26 | 2784 |
| Wenatchee | 10:22:24 | -26.9 | Dark | Down | 41.6 | 101.6 | Up | 10:07:24 - 10:37:24 | 2764 |
| Ellensburg | 10:22:16 | -27.3 | Dark | Down | 41.5 | 101.0 | Up | 10:07:16 - 10:37:16 | 2733 |
| Yakima | 10:22:12 | -27.6 | Dark | Down | 41.5 | 100.7 | Up | 10:07:12 - 10:37:12 | 2698 |
| Toppenish/White Swan | 10:22:11 | -27.7 | Dark | Down | 41.7 | 100.6 | Up | 10:07:11 - 10:37:11 | 2675 |
| Goldendale | 10:22:01 | -28.4 | Dark | Down | 41.5 | 99.7 | Up | 10:07:01 - 10:37:01 | 2636 |
| Pasco | 10:22:19 | -27.2 | Dark | Down | 42.6 | 101.6 | Up | 10:07:19 - 10:37:19 | 2633 |
| The Dalles | 10:21:56 | -28.7 | Dark | Down | 41.2 | 99.2 | Up | 10:06:56 - 10:36:56 | 2625 |
| PNWRO | 10:22:18 | -27.3 | Dark | Down | 42.8 | 101.6 | Up | 10:07:18 - 10:37:18 | 2605 |
| Maupin | 10:21:51 | -29.0 | Dark | Down | 41.4 | 98.9 | Up | 10:06:51 - 10:36:51 | 2585 |
| Sisters | 10:21:39 | -29.9 | Dark | Down | 41.1 | 97.7 | Up | 10:06:39 - 10:36:39 | 2519 |
| Redmond | 10:21:41 | -29.8 | Dark | Down | 41.4 | 98.0 | Up | 10:06:41 - 10:36:41 | 2506 |
| Bend | 10:21:37 | -30.0 | Dark | Down | 41.3 | 97.7 | Up | 10:06:37 - 10:36:37 | 2491 |
| Oregon Observatory | 10:21:35 | -30.2 | Dark | Down | 41.2 | 97.5 | Up | 10:06:35 - 10:36:35 | 2479 |
| La Pine/Gilchrist | 10:21:33 | -30.4 | Dark | Down | 41.2 | 97.2 | Up | 10:06:33 - 10:36:33 | 2462 |
| North Lake | 10:21:33 | -30.4 | Dark | Down | 41.7 | 97.3 | Up | 10:06:33 - 10:36:33 | 2406 |
| Paisley | 10:21:31 | -30.7 | Dark | Down | 42.0 | 97.1 | Up | 10:06:31 - 10:36:31 | 2347 |
| Klamath Falls | 10:21:15 | -31.7 | Dark | Down | 41.1 | 95.7 | Up | 10:06:15 - 10:36:15 | 2336 |
| Lakeview | 10:21:26 | -31.0 | Dark | Down | 42.2 | 96.8 | Up | 10:06:26 - 10:36:26 | 2295 |
| Cedarville | 10:21:21 | -31.4 | Dark | Down | 42.4 | 96.3 | Up | 10:06:21 - 10:36:21 | 2229 |
| Fall River/Burney | 10:21:06 | -32.4 | Dark | Down | 41.5 | 94.9 | Up | 10:06:06 - 10:36:06 | 2217 |
| Susanville | 10:21:06 | -32.5 | Dark | Down | 42.1 | 94.9 | Up | 10:06:06 - 10:36:06 | 2138 |
| Greenville | 10:21:01 | -32.8 | Dark | Down | 41.9 | 94.4 | Up | 10:06:01 - 10:36:01 | 2120 |
| Gimple | 10:21:01 | -32.8 | Dark | Down | 42.0 | 94.5 | Up | 10:06:01 - 10:36:01 | 2118 |
| Quincy | 10:20:59 | -33.0 | Dark | Down | 41.9 | 94.2 | Up | 10:05:59 - 10:35:59 | 2101 |
| Portola | 10:21:02 | -32.8 | Dark | Down | 42.3 | 94.5 | Up | 10:06:02 - 10:36:02 | 2076 |
| Reno | 10:21:03 | -32.7 | Dark | Down | 42.8 | 94.7 | Up | 10:06:03 - 10:36:03 | 2033 |
| Carson City | 10:21:01 | -32.9 | Dark | Down | 42.9 | 94.4 | Up | 10:06:01 - 10:36:01 | 1999 |
| Gardnerville | 10:20:59 | -33.1 | Dark | Down | 42.9 | 94.2 | Up | 10:05:59 - 10:35:59 | 1974 |
| Yerington | 10:21:05 | -32.7 | Dark | Down | 43.4 | 94.6 | Up | 10:06:05 - 10:36:05 | 1963 |
| Hawthorne | 10:21:04 | -32.8 | Dark | Down | 43.8 | 94.6 | Up | 10:06:04 - 10:36:04 | 1904 |
| Lee Vining | 10:20:55 | -33.5 | Dark | Down | 43.4 | 93.7 | Up | 10:05:55 - 10:35:55 | 1863 |
| Tonopah | 10:21:14 | -32.3 | Dark | Down | 45.0 | 95.1 | Up | 10:06:14 - 10:36:14 | 1821 |
| Bishop | 10:20:57 | -33.5 | Dark | Down | 44.1 | 93.6 | Up | 10:05:57 - 10:35:57 | 1785 |
| Niwot | 10:23:38 | -23.3 | Dark | Down | 54.2 | 107.7 | Up | 10:08:38 - 10:38:38 | 1735 |
| SwRI | 10:23:37 | -23.4 | Dark | Down | 54.2 | 107.5 | Up | 10:08:37 - 10:38:37 | 1726 |
| Beatty | 10:21:08 | -32.8 | Dark | Down | 45.4 | 94.2 | Up | 10:06:08 - 10:36:08 | 1696 |
| CPSLO | 10:20:17 | -36.3 | Dark | Down | 42.2 | 90.1 | Up | 10:05:17 - 10:35:17 | 1650 |
| Indian Springs | 10:21:15 | -32.4 | Dark | Down | 46.3 | 94.6 | Up | 10:06:15 - 10:36:15 | 1634 |
| Henderson | 10:21:19 | -32.3 | Dark | Down | 47.0 | 94.5 | Up | 10:06:19 - 10:36:19 | 1563 |
| Searchlight/Boulder City | 10:21:14 | -32.6 | Dark | Down | 47.0 | 93.9 | Up | 10:06:14 - 10:36:14 | 1504 |
| Wildwood | 10:20:25 | -35.9 | Dark | Down | 43.9 | 90.2 | Up | 10:05:25 - 10:35:25 | 1471 |
| Patrick | 10:21:25 | -32.0 | Dark | Down | 47.9 | 94.6 | Up | 10:06:25 - 10:36:25 | 1471 |
| Laughlin/Bullhead City | 10:21:16 | -32.6 | Dark | Down | 47.3 | 93.8 | Up | 10:06:16 - 10:36:16 | 1465 |
| Kingman/Dolan Springs | 10:21:21 | -32.2 | Dark | Down | 47.8 | 94.2 | Up | 10:06:21 - 10:36:21 | 1454 |
| Mohave Valley | 10:21:14 | -32.8 | Dark | Down | 47.4 | 93.5 | Up | 10:06:14 - 10:36:14 | 1438 |
| DCO | 10:21:30 | -31.7 | Dark | Down | 48.6 | 94.7 | Up | 10:06:30 - 10:36:30 | 1421 |
| Lake Havasu City | 10:21:12 | -32.9 | Dark | Down | 47.6 | 93.3 | Up | 10:06:12 - 10:36:12 | 1391 |
| Idyllwild | 10:20:41 | -35.0 | Dark | Down | 45.5 | 91.0 | Up | 10:05:41 - 10:35:41 | 1382 |
| Parker | 10:21:10 | -33.1 | Dark | Down | 47.6 | 92.9 | Up | 10:06:10 - 10:36:10 | 1355 |
| Blythe | 10:21:02 | -33.6 | Dark | Down | 47.4 | 92.1 | Up | 10:06:02 - 10:36:02 | 1310 |
| Calipatria | 10:20:49 | -34.6 | Dark | Down | 46.5 | 91.0 | Up | 10:05:49 - 10:35:49 | 1287 |
| George/Scottsdale | 10:21:33 | -31.7 | Dark | Down | 49.7 | 94.0 | Up | 10:06:33 - 10:36:33 | 1247 |
| Yuma | 10:20:54 | -34.2 | Dark | Down | 47.3 | 91.1 | Up | 10:05:54 - 10:35:54 | 1218 |
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 99RW215, (2025/09/03 10:32UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:29 0.8 6.43 141 3Iot Aur 04:56:59.6 +33:09:58 2.7 10.89 149 PPM 093742 04:45:42.5 +23:37:41 6.1 1.12 146 PPM 093707 04:42:12.2 +22:56:33 7.2 0.25 145 PPM 093716 04:42:44.0 +22:36:19 10.6 0.13 145 99RW215 04:42:46.6 +22:44:07 15.5 145 Positions are for J2000
Event circumstances last updated at 2020/08/10 01:40:54 UT
Marc W. Buie, Southwest Research Institute