Event between (120216) 04EW95 and star UC4-306-078196 with event index number of 109262
Geocentric closest approach at 2018/03/09 09:32:17 UTC
J2000 position of star is 14:52:25.3 -28:55:56
Equinox of date position of star is 14:53:29.4 -29:00:17
Stellar brightness R=14.8,
use SENSEUP=128
Star is 33 degrees from the moon.
Moon is 51% illuminated.
TNO apparent brightness V=20.8
[RECON map]
TNO is 27.0 AU from the Sun
and 26.5 AU from the Earth.
The TNO is moving 11.9
km/sec on the sky relative to the star, or,
2.2 arcsec/hr.
The 1-sigma error in the time of the event is 206 seconds.
The 1-sigma cross-track error in the shadow position is
2419 km.
The sky-plane scale is
19209.9 km/arcsec.
The TNO has an absolute magnitude Hv=6.3
Diameter=331.1 km assuming a 5% albedo -- 27.9 sec chord
Diameter=135.2 km assuming a 30% albedo -- 11.4 sec chord
Dynamical classification is 3:2E
Star training set for 120216, (2018/03/09 09:32UT) Object RA Dec mag sep mel Antares 16:30:31.5 -26:28:15 0.9 21.58 12 5The Cen 14:07:45.5 -36:27:31 2.1 12.15 44 58 Hya 14:51:21.7 -28:02:06 4.6 1.08 33 PPM 263444 14:51:02.6 -29:06:33 7.3 0.55 33 PPM 263507 14:53:54.5 -28:59:18 9.0 0.09 33 120216 14:53:30.4 -29:00:21 14.8 33 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
4.4 sigma about the mid-time.
The median site spacing is 9.8 km
RECON observability=0.2 and success probability=0.3%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Manson/Chelan | 09:31:25 | -43.3 | Dark | Up | 7.5 | 150.9 | Really Low | 09:16:25 - 09:46:25 | 6365 |
| Entiat | 09:31:27 | -43.5 | Dark | Up | 7.7 | 150.9 | Really Low | 09:16:27 - 09:46:27 | 6364 |
| Wenatchee | 09:31:29 | -43.7 | Dark | Up | 7.9 | 150.8 | Really Low | 09:16:29 - 09:46:29 | 6363 |
| Oroville | 09:31:19 | -42.1 | Dark | Up | 6.8 | 151.6 | Really Low | 09:16:19 - 09:46:19 | 6363 |
| Ellensburg | 09:31:32 | -44.2 | Dark | Up | 8.2 | 150.6 | Really Low | 09:16:32 - 09:46:32 | 6362 |
| Brewster | 09:31:23 | -43.0 | Dark | Up | 7.5 | 151.2 | Really Low | 09:16:23 - 09:46:23 | 6362 |
| Tonasket | 09:31:18 | -42.3 | Dark | Up | 7.0 | 151.6 | Really Low | 09:16:18 - 09:46:18 | 6362 |
| Okanogan | 09:31:20 | -42.7 | Dark | Up | 7.3 | 151.4 | Really Low | 09:16:20 - 09:46:20 | 6361 |
| Yakima | 09:31:33 | -44.5 | Dark | Up | 8.5 | 150.5 | Really Low | 09:16:33 - 09:46:33 | 6358 |
| The Dalles | 09:31:41 | -45.6 | Dark | Up | 9.2 | 150.0 | Really Low | 09:16:41 - 09:46:41 | 6355 |
| Toppenish/White Swan | 09:31:35 | -44.7 | Dark | Up | 8.8 | 150.7 | Really Low | 09:16:35 - 09:46:35 | 6354 |
| Goldendale | 09:31:40 | -45.3 | Dark | Up | 9.1 | 150.3 | Really Low | 09:16:40 - 09:46:40 | 6353 |
| Maupin | 09:31:43 | -45.9 | Dark | Up | 9.6 | 150.0 | Really Low | 09:16:43 - 09:46:43 | 6349 |
| Sisters | 09:31:50 | -46.9 | Dark | Up | 10.2 | 149.6 | Really Low | 09:16:50 - 09:46:50 | 6343 |
| Madras/Culver | 09:31:46 | -46.4 | Dark | Up | 10.1 | 150.0 | Really Low | 09:16:46 - 09:46:46 | 6343 |
| Pasco | 09:31:27 | -44.4 | Dark | Up | 9.3 | 151.7 | Really Low | 09:16:27 - 09:46:27 | 6338 |
| Redmond | 09:31:49 | -46.8 | Dark | Up | 10.4 | 149.9 | Really Low | 09:16:49 - 09:46:49 | 6338 |
| George/Umatilla | 09:31:31 | -44.7 | Dark | Up | 9.5 | 151.5 | Really Low | 09:16:31 - 09:46:31 | 6337 |
| Bend | 09:31:50 | -47.0 | Dark | Up | 10.5 | 149.8 | Really Low | 09:16:50 - 09:46:50 | 6337 |
| Oregon Observatory | 09:31:51 | -47.2 | Dark | Up | 10.6 | 149.7 | Really Low | 09:16:51 - 09:46:51 | 6336 |
| La Pine/Gilchrist | 09:31:54 | -47.4 | Dark | Up | 10.8 | 149.6 | Really Low | 09:16:54 - 09:46:54 | 6333 |
| PNWRO | 09:31:26 | -44.5 | Dark | Up | 9.6 | 151.8 | Really Low | 09:16:26 - 09:46:26 | 6333 |
| North Lake | 09:31:52 | -47.6 | Dark | Up | 11.4 | 150.0 | Really Low | 09:16:52 - 09:46:52 | 6320 |
| Chiloquin | 09:32:00 | -48.5 | Dark | Up | 11.6 | 149.2 | Really Low | 09:17:00 - 09:47:00 | 6320 |
| Klamath Falls | 09:32:02 | -48.8 | Dark | Up | 11.9 | 149.3 | Really Low | 09:17:02 - 09:47:02 | 6313 |
| Paisley | 09:31:51 | -47.9 | Dark | Up | 12.0 | 150.3 | Really Low | 09:16:51 - 09:46:51 | 6307 |
| Tulelake | 09:32:02 | -48.9 | Dark | Up | 12.3 | 149.5 | Really Low | 09:17:02 - 09:47:02 | 6305 |
| Lakeview | 09:31:54 | -48.3 | Dark | Up | 12.5 | 150.4 | Really Low | 09:16:54 - 09:46:54 | 6296 |
| Fall River/Burney | 09:32:06 | -49.6 | Dark | Up | 13.1 | 149.4 | Really Low | 09:17:06 - 09:47:06 | 6287 |
| Cedarville | 09:31:56 | -48.8 | Dark | Up | 13.1 | 150.5 | Really Low | 09:16:56 - 09:46:56 | 6281 |
| Susanville | 09:32:03 | -49.9 | Dark | Up | 13.9 | 150.0 | Really Low | 09:17:03 - 09:47:03 | 6265 |
| Greenville | 09:32:06 | -50.2 | Dark | Up | 14.1 | 149.7 | Really Low | 09:17:06 - 09:47:06 | 6263 |
| Gimple | 09:32:06 | -50.2 | Dark | Up | 14.1 | 149.8 | Really Low | 09:17:06 - 09:47:06 | 6261 |
| Quincy | 09:32:08 | -50.4 | Dark | Up | 14.2 | 149.7 | Really Low | 09:17:08 - 09:47:08 | 6258 |
| Portola | 09:32:05 | -50.3 | Dark | Up | 14.5 | 150.0 | Really Low | 09:17:05 - 09:47:05 | 6249 |
| Reno | 09:32:01 | -50.3 | Dark | Up | 15.0 | 150.5 | Really Low | 09:17:01 - 09:47:01 | 6235 |
| Carson City | 09:32:04 | -50.6 | Dark | Up | 15.3 | 150.5 | Really Low | 09:17:04 - 09:47:04 | 6226 |
| Gardnerville | 09:32:06 | -50.8 | Dark | Up | 15.6 | 150.5 | Really Low | 09:17:06 - 09:47:06 | 6220 |
| Yerington | 09:32:02 | -50.5 | Dark | Up | 15.7 | 151.0 | Really Low | 09:17:02 - 09:47:02 | 6213 |
| Hawthorne | 09:32:01 | -50.6 | Dark | Up | 16.3 | 151.4 | Really Low | 09:17:01 - 09:47:01 | 6194 |
| Lee Vining | 09:32:05 | -51.3 | Dark | Up | 16.6 | 150.9 | Really Low | 09:17:05 - 09:47:05 | 6187 |
| Tonopah | 09:31:53 | -50.3 | Dark | Up | 17.3 | 152.4 | Really Low | 09:16:53 - 09:46:53 | 6161 |
| Bishop | 09:32:01 | -51.4 | Dark | Up | 17.4 | 151.4 | Really Low | 09:17:01 - 09:47:01 | 6160 |
| Lone Pine | 09:32:06 | -51.9 | Dark | Up | 18.2 | 151.6 | Really Low | 09:17:06 - 09:47:06 | 6134 |
| CPSLO | 09:32:26 | -54.1 | Dark | Up | 18.4 | 149.3 | Really Low | 09:17:26 - 09:47:26 | 6132 |
| Beatty | 09:31:54 | -51.0 | Dark | Up | 18.5 | 152.7 | Really Low | 09:16:54 - 09:46:54 | 6122 |
| Indian Springs | 09:31:50 | -50.7 | Dark | Up | 19.1 | 153.5 | Really Low | 09:16:50 - 09:46:50 | 6094 |
| Henderson | 09:31:49 | -50.7 | Dark | Up | 19.9 | 154.0 | Really Low | 09:16:49 - 09:46:49 | 6065 |
| Wildwood | 09:32:21 | -54.1 | Dark | Up | 20.3 | 150.7 | Low | 09:17:21 - 09:47:21 | 6064 |
| Searchlight/Boulder City | 09:31:50 | -51.1 | Dark | Up | 20.4 | 154.0 | Low | 09:16:50 - 09:46:50 | 6046 |
| Laughlin/Bullhead City | 09:31:49 | -51.1 | Dark | Up | 20.8 | 154.2 | Low | 09:16:49 - 09:46:49 | 6030 |
| Patrick | 09:31:42 | -50.6 | Dark | Up | 20.8 | 154.8 | Low | 09:16:42 - 09:46:42 | 6025 |
| Mohave Valley | 09:31:50 | -51.3 | Dark | Up | 21.0 | 154.2 | Low | 09:16:50 - 09:46:50 | 6021 |
| Kingman/Dolan Springs | 09:31:46 | -50.8 | Dark | Up | 20.9 | 154.6 | Low | 09:16:46 - 09:46:46 | 6021 |
| Idyllwild | 09:32:09 | -53.3 | Dark | Up | 21.3 | 152.2 | Low | 09:17:09 - 09:47:09 | 6021 |
| Lake Havasu City | 09:31:50 | -51.5 | Dark | Up | 21.5 | 154.3 | Low | 09:16:50 - 09:46:50 | 6003 |
| DCO | 09:31:41 | -50.4 | Dark | Up | 21.3 | 155.4 | Low | 09:16:41 - 09:46:41 | 6001 |
| Parker | 09:31:52 | -51.7 | Dark | Up | 21.8 | 154.3 | Low | 09:16:52 - 09:46:52 | 5991 |
| Calipatria | 09:32:04 | -53.1 | Dark | Up | 22.3 | 153.1 | Low | 09:17:04 - 09:47:04 | 5979 |
| Blythe | 09:31:55 | -52.2 | Dark | Up | 22.2 | 154.0 | Low | 09:16:55 - 09:46:55 | 5978 |
| Niwot | 09:30:30 | -42.5 | Dark | Up | 18.8 | 162.8 | Really Low | 09:15:30 - 09:45:30 | 5966 |
| Yuma | 09:31:58 | -52.9 | Dark | Up | 23.0 | 153.8 | Low | 09:16:58 - 09:46:58 | 5946 |
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 120216, (2018/03/09 09:32UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 21.58 12 5The Cen 14:06:40.2 -36:22:21 2.1 12.15 44 58 Hya 14:50:17.0 -27:57:38 4.6 1.08 33 PPM 263444 14:49:57.5 -29:02:04 7.3 0.55 33 PPM 263507 14:52:49.4 -28:54:53 9.0 0.09 33 120216 14:52:25.3 -28:55:56 14.8 33 Positions are for J2000
Event circumstances last updated at 2017/12/02 17:19:58 UT
Marc W. Buie, Southwest Research Institute