Event between 99RW215 and star GA1120:00709265 with event index number of 1490722
Geocentric closest approach at 2025/12/17 06:37:51 UTC
J2000 position of star is 04:35:32.1 +22:23:41
Equinox of date position of star is 04:36:41.1 +22:25:59
Stellar brightness G=13.9,
use SENSEUP=64
Star is 164 degrees from the moon.
Moon is 7% illuminated.
TNO apparent brightness V=22.8
[RECON map]
TNO is 30.7 AU from the Sun
and 29.8 AU from the Earth.
The TNO is moving 23.6
km/sec on the sky relative to the star, or,
3.9 arcsec/hr.
The 1-sigma error in the time of the event is 699 seconds.
The 1-sigma cross-track error in the shadow position is
4763 km.
The sky-plane scale is
21587.4 km/arcsec.
The TNO has an absolute magnitude Hv=7.9
Diameter=156.3 km assuming a 5% albedo -- 6.6 sec chord
Diameter=63.8 km assuming a 30% albedo -- 2.7 sec chord
Dynamical classification is 4:3E
Star training set for 99RW215, (2025/12/17 06:38UT) Object RA Dec mag sep mel Aldebaran 04:37:24.8 +16:33:35 0.8 5.89 162 3Iot Aur 04:58:41.3 +33:12:17 2.7 11.77 158 PPM 093646 04:39:47.9 +20:44:05 5.9 1.82 163 PPM 093610 04:36:18.9 +22:44:39 7.2 0.35 164 PPM 093617 04:36:46.5 +22:32:38 11.5 0.12 164 99RW215 04:37:05.3 +22:26:47 13.9 164 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
1.3 sigma about the mid-time.
The median site spacing is 22.9 km
RECON observability=1.0 and success probability=7.8%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Kelowna | 06:37:37 | -59.6 | Dark | Down | 62.4 | 174.6 | Up | 06:22:37 - 06:52:37 | 6396 |
| Summerland | 06:37:39 | -59.7 | Dark | Down | 62.7 | 174.0 | Up | 06:22:39 - 06:52:39 | 6372 |
| Penticton | 06:37:38 | -59.8 | Dark | Down | 62.8 | 174.2 | Up | 06:22:38 - 06:52:38 | 6364 |
| Okanagan Falls | 06:37:39 | -60.0 | Dark | Down | 63.0 | 174.1 | Up | 06:22:39 - 06:52:39 | 6346 |
| Oliver | 06:37:39 | -60.1 | Dark | Down | 63.1 | 174.1 | Up | 06:22:39 - 06:52:39 | 6330 |
| Anarchist Mountain Observatory | 06:37:38 | -60.3 | Dark | Down | 63.3 | 174.5 | Up | 06:22:38 - 06:52:38 | 6310 |
| Oroville | 06:37:38 | -60.3 | Dark | Down | 63.4 | 174.3 | Up | 06:22:38 - 06:52:38 | 6304 |
| Tonasket | 06:37:39 | -60.5 | Dark | Down | 63.6 | 174.3 | Up | 06:22:39 - 06:52:39 | 6281 |
| Okanogan | 06:37:40 | -60.7 | Dark | Down | 63.9 | 173.9 | Up | 06:22:40 - 06:52:40 | 6251 |
| Brewster | 06:37:40 | -60.9 | Dark | Down | 64.2 | 173.4 | Up | 06:22:40 - 06:52:40 | 6228 |
| Manson/Chelan | 06:37:42 | -60.9 | Dark | Down | 64.4 | 172.6 | Up | 06:22:42 - 06:52:42 | 6213 |
| Entiat | 06:37:42 | -61.0 | Dark | Down | 64.6 | 172.4 | Up | 06:22:42 - 06:52:42 | 6193 |
| Wenatchee | 06:37:43 | -61.2 | Dark | Down | 64.8 | 172.1 | Up | 06:22:43 - 06:52:43 | 6169 |
| Ellensburg | 06:37:44 | -61.4 | Dark | Down | 65.2 | 171.5 | Up | 06:22:44 - 06:52:44 | 6132 |
| Yakima | 06:37:44 | -61.7 | Dark | Down | 65.6 | 171.3 | Up | 06:22:44 - 06:52:44 | 6093 |
| Toppenish/White Swan | 06:37:44 | -61.9 | Dark | Down | 65.8 | 171.6 | Up | 06:22:44 - 06:52:44 | 6068 |
| Pasco | 06:37:40 | -62.6 | Dark | Down | 66.1 | 174.4 | Up | 06:22:40 - 06:52:40 | 6036 |
| Goldendale | 06:37:47 | -62.1 | Dark | Down | 66.3 | 170.5 | Up | 06:22:47 - 06:52:47 | 6021 |
| PNWRO | 06:37:40 | -62.9 | Dark | Down | 66.3 | 174.9 | Up | 06:22:40 - 06:52:40 | 6008 |
| George/Umatilla | 06:37:41 | -62.7 | Dark | Down | 66.4 | 173.9 | Up | 06:22:41 - 06:52:41 | 6006 |
| The Dalles | 06:37:47 | -62.1 | Dark | Down | 66.5 | 169.6 | Up | 06:22:47 - 06:52:47 | 6005 |
| Maupin | 06:37:48 | -62.5 | Dark | Down | 66.9 | 169.6 | Up | 06:22:48 - 06:52:48 | 5961 |
| Madras/Culver | 06:37:49 | -62.8 | Dark | Down | 67.5 | 169.3 | Up | 06:22:49 - 06:52:49 | 5908 |
| Sisters | 06:37:51 | -62.8 | Dark | Down | 67.7 | 168.1 | Up | 06:22:51 - 06:52:51 | 5882 |
| Redmond | 06:37:49 | -63.1 | Dark | Down | 67.8 | 169.0 | Up | 06:22:49 - 06:52:49 | 5873 |
| Bend | 06:37:50 | -63.1 | Dark | Down | 68.0 | 168.6 | Up | 06:22:50 - 06:52:50 | 5854 |
| Oregon Observatory | 06:37:50 | -63.2 | Dark | Down | 68.2 | 168.2 | Up | 06:22:50 - 06:52:50 | 5838 |
| La Pine/Gilchrist | 06:37:50 | -63.3 | Dark | Down | 68.4 | 167.9 | Up | 06:22:50 - 06:52:50 | 5819 |
| North Lake | 06:37:49 | -63.9 | Dark | Down | 68.9 | 169.2 | Up | 06:22:49 - 06:52:49 | 5765 |
| Chiloquin | 06:37:53 | -63.9 | Dark | Down | 69.4 | 166.4 | Up | 06:22:53 - 06:52:53 | 5713 |
| Paisley | 06:37:48 | -64.5 | Dark | Down | 69.5 | 169.9 | Up | 06:22:48 - 06:52:48 | 5703 |
| Klamath Falls | 06:37:53 | -64.1 | Dark | Down | 69.7 | 166.4 | Up | 06:22:53 - 06:52:53 | 5677 |
| Lakeview | 06:37:48 | -64.9 | Dark | Down | 70.0 | 170.1 | Up | 06:22:48 - 06:52:48 | 5648 |
| Tulelake | 06:37:53 | -64.5 | Dark | Down | 70.0 | 167.1 | Up | 06:22:53 - 06:52:53 | 5644 |
| Cedarville | 06:37:48 | -65.5 | Dark | Down | 70.6 | 170.3 | Up | 06:22:48 - 06:52:48 | 5578 |
| Fall River/Burney | 06:37:53 | -65.1 | Dark | Down | 70.9 | 166.7 | Up | 06:22:53 - 06:52:53 | 5550 |
| Susanville | 06:37:51 | -65.9 | Dark | Down | 71.7 | 168.4 | Up | 06:22:51 - 06:52:51 | 5472 |
| Greenville | 06:37:52 | -65.9 | Dark | Down | 71.9 | 167.4 | Up | 06:22:52 - 06:52:52 | 5449 |
| Gimple | 06:37:52 | -66.0 | Dark | Down | 71.9 | 167.6 | Up | 06:22:52 - 06:52:52 | 5447 |
| Quincy | 06:37:53 | -66.0 | Dark | Down | 72.1 | 167.2 | Up | 06:22:53 - 06:52:53 | 5428 |
| Portola | 06:37:51 | -66.4 | Dark | Down | 72.3 | 168.6 | Up | 06:22:51 - 06:52:51 | 5407 |
| Reno | 06:37:49 | -67.0 | Dark | Down | 72.6 | 170.4 | Up | 06:22:49 - 06:52:49 | 5367 |
| Carson City | 06:37:49 | -67.2 | Dark | Down | 73.0 | 170.2 | Up | 06:22:49 - 06:52:49 | 5330 |
| Gardnerville | 06:37:49 | -67.4 | Dark | Down | 73.3 | 170.2 | Up | 06:22:49 - 06:52:49 | 5304 |
| Yerington | 06:37:47 | -67.7 | Dark | Down | 73.3 | 172.1 | Up | 06:22:47 - 06:52:47 | 5298 |
| Hawthorne | 06:37:46 | -68.3 | Dark | Down | 73.8 | 173.6 | Up | 06:22:46 - 06:52:46 | 5241 |
| Niwot | 06:36:57 | -72.7 | Dark | Down | 69.8 | 211.8 | Up | 06:21:57 - 06:51:57 | 5226 |
| SwRI | 06:36:57 | -72.8 | Dark | Down | 70.0 | 211.8 | Up | 06:21:57 - 06:51:57 | 5216 |
| Lee Vining | 06:37:48 | -68.4 | Dark | Down | 74.3 | 171.8 | Up | 06:22:48 - 06:52:48 | 5190 |
| Tonopah | 06:37:42 | -69.5 | Dark | Down | 74.3 | 178.2 | Up | 06:22:42 - 06:52:42 | 5168 |
| Bishop | 06:37:47 | -69.2 | Dark | Down | 75.0 | 174.0 | Up | 06:22:47 - 06:52:47 | 5115 |
| Beatty | 06:37:41 | -70.5 | Dark | Down | 75.5 | 179.7 | Up | 06:22:41 - 06:52:41 | 5038 |
| Lone Pine | 06:37:45 | -69.8 | Dark | Down | 75.7 | 174.9 | Up | 06:22:45 - 06:52:45 | 5029 |
| Indian Springs | 06:37:37 | -71.3 | Dark | Down | 75.8 | 183.7 | Up | 06:22:37 - 06:52:37 | 4986 |
| CPSLO | 06:37:56 | -68.8 | Dark | Down | 76.6 | 164.1 | Up | 06:22:56 - 06:52:56 | 4940 |
| Henderson | 06:37:35 | -72.1 | Dark | Down | 76.3 | 186.6 | Up | 06:22:35 - 06:52:35 | 4918 |
| Searchlight/Boulder City | 06:37:35 | -72.5 | Dark | Down | 76.8 | 187.1 | Up | 06:22:35 - 06:52:35 | 4856 |
| Patrick | 06:37:31 | -73.2 | Dark | Down | 76.8 | 191.3 | Up | 06:22:31 - 06:52:31 | 4834 |
| Laughlin/Bullhead City | 06:37:34 | -72.9 | Dark | Down | 77.1 | 188.7 | Up | 06:22:34 - 06:52:34 | 4819 |
| Kingman/Dolan Springs | 06:37:32 | -73.2 | Dark | Down | 77.0 | 190.7 | Up | 06:22:32 - 06:52:32 | 4813 |
| DCO | 06:37:29 | -73.8 | Dark | Down | 76.9 | 194.4 | Up | 06:22:29 - 06:52:29 | 4790 |
| Mohave Valley | 06:37:34 | -73.1 | Dark | Down | 77.4 | 188.9 | Up | 06:22:34 - 06:52:34 | 4790 |
| Wildwood | 06:37:50 | -70.8 | Dark | Down | 78.2 | 171.5 | Up | 06:22:50 - 06:52:50 | 4773 |
| Lake Havasu City | 06:37:33 | -73.5 | Dark | Down | 77.7 | 190.2 | Up | 06:22:33 - 06:52:33 | 4743 |
| Parker | 06:37:33 | -73.7 | Dark | Down | 78.1 | 190.6 | Up | 06:22:33 - 06:52:33 | 4705 |
| Idyllwild | 06:37:43 | -72.4 | Dark | Down | 78.7 | 179.9 | Up | 06:22:43 - 06:52:43 | 4701 |
| Blythe | 06:37:35 | -73.9 | Dark | Down | 78.6 | 189.8 | Up | 06:22:35 - 06:52:35 | 4653 |
| Calipatria | 06:37:39 | -73.5 | Dark | Down | 79.2 | 185.7 | Up | 06:22:39 - 06:52:39 | 4616 |
| Yuma | 06:37:36 | -74.4 | Dark | Down | 79.5 | 190.4 | Up | 06:22:36 - 06:52:36 | 4555 |
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, (2025/12/17 06:38UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:30 0.8 5.89 162 3Iot Aur 04:56:59.6 +33:09:58 2.7 11.77 158 PPM 093646 04:38:15.8 +20:41:05 5.9 1.82 163 PPM 093610 04:34:45.5 +22:41:32 7.2 0.35 164 PPM 093617 04:35:13.3 +22:29:31 11.5 0.12 164 99RW215 04:35:32.1 +22:23:41 13.9 164 Positions are for J2000
Event circumstances last updated at 2019/03/25 00:57:08 UT
Marc W. Buie, Southwest Research Institute