Event between 11MM4 and star UC4-831-013975 with event index number of 104785
Geocentric closest approach at 2018/02/04 04:15:31 UTC
J2000 position of star is 13:57:15.4 +76:07:19
Equinox of date position of star is 13:57:23.0 +76:02:15
Stellar brightness R=12.9,
use SENSEUP=32
Star is 75 degrees from the moon.
Moon is 83% illuminated.
TNO apparent brightness V=22.3
[RECON map]
TNO is 18.5 AU from the Sun
and 18.2 AU from the Earth.
The TNO is moving 34.2
km/sec on the sky relative to the star, or,
9.4 arcsec/hr.
The 1-sigma error in the time of the event is 274 seconds.
The 1-sigma cross-track error in the shadow position is
4767 km.
The sky-plane scale is
13167.4 km/arcsec.
The TNO has an absolute magnitude Hv=9.4
Diameter=80.5 km assuming a 5% albedo -- 2.4 sec chord
Diameter=32.9 km assuming a 30% albedo -- 1.0 sec chord
Dynamical classification is CENTAURR
Star training set for 11MM4, (2018/02/04 04:16UT) Object RA Dec mag sep mel Deneb 20:42:03.0 +45:20:45 1.3 48.89 112 Kochab 14:50:40.3 +74:04:53 2.1 3.94 75 4 UMi 14:08:48.2 +77:27:45 4.8 1.57 77 PPM 008502 13:49:45.4 +75:28:39 8.0 0.73 74 PPM 008523 13:54:53.8 +76:10:33 9.6 0.21 75 11MM4 13:57:23.3 +76:02:02 12.9 75 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
3.3 sigma about the mid-time.
The median site spacing is 12.3 km
RECON observability=1.0 and success probability=7.9%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Oroville | 04:17:49 | -32.8 | Dark | Down | 39.1 | 13.7 | Up | 04:02:49 - 04:32:49 | 2309 |
| Manson/Chelan | 04:17:51 | -32.5 | Dark | Down | 38.0 | 13.3 | Up | 04:02:51 - 04:32:51 | 2307 |
| Entiat | 04:17:52 | -32.5 | Dark | Down | 37.7 | 13.3 | Up | 04:02:52 - 04:32:52 | 2301 |
| Tonasket | 04:17:50 | -32.8 | Dark | Down | 38.9 | 13.7 | Up | 04:02:50 - 04:32:50 | 2298 |
| Wenatchee | 04:17:52 | -32.5 | Dark | Down | 37.5 | 13.2 | Up | 04:02:52 - 04:32:52 | 2296 |
| Brewster | 04:17:51 | -32.7 | Dark | Down | 38.2 | 13.5 | Up | 04:02:51 - 04:32:51 | 2292 |
| Ellensburg | 04:17:53 | -32.5 | Dark | Down | 37.0 | 13.1 | Up | 04:02:53 - 04:32:53 | 2292 |
| Okanogan | 04:17:50 | -32.8 | Dark | Down | 38.5 | 13.6 | Up | 04:02:50 - 04:32:50 | 2292 |
| Yakima | 04:17:54 | -32.5 | Dark | Down | 36.6 | 13.0 | Up | 04:02:54 - 04:32:54 | 2275 |
| The Dalles | 04:17:56 | -32.3 | Dark | Down | 35.6 | 12.7 | Up | 04:02:56 - 04:32:56 | 2273 |
| Goldendale | 04:17:55 | -32.5 | Dark | Down | 35.9 | 12.8 | Up | 04:02:55 - 04:32:55 | 2258 |
| Toppenish/White Swan | 04:17:54 | -32.7 | Dark | Down | 36.5 | 13.0 | Up | 04:02:54 - 04:32:54 | 2254 |
| Maupin | 04:17:56 | -32.4 | Dark | Down | 35.2 | 12.7 | Up | 04:02:56 - 04:32:56 | 2248 |
| Sisters | 04:17:57 | -32.2 | Dark | Down | 34.3 | 12.4 | Up | 04:02:57 - 04:32:57 | 2244 |
| Madras/Culver | 04:17:57 | -32.5 | Dark | Down | 34.6 | 12.6 | Up | 04:02:57 - 04:32:57 | 2227 |
| Oregon Observatory | 04:17:58 | -32.4 | Dark | Down | 33.9 | 12.4 | Up | 04:02:58 - 04:32:58 | 2217 |
| Bend | 04:17:58 | -32.5 | Dark | Down | 34.1 | 12.5 | Up | 04:02:58 - 04:32:58 | 2215 |
| Redmond | 04:17:57 | -32.5 | Dark | Down | 34.3 | 12.5 | Up | 04:02:57 - 04:32:57 | 2215 |
| La Pine/Gilchrist | 04:17:58 | -32.4 | Dark | Down | 33.7 | 12.4 | Up | 04:02:58 - 04:32:58 | 2213 |
| Chiloquin | 04:18:01 | -32.3 | Dark | Down | 32.5 | 12.1 | Up | 04:03:01 - 04:33:01 | 2192 |
| Klamath Falls | 04:18:01 | -32.4 | Dark | Down | 32.2 | 12.1 | Up | 04:03:01 - 04:33:01 | 2172 |
| Pasco | 04:17:53 | -33.6 | Dark | Down | 36.5 | 13.3 | Up | 04:02:53 - 04:32:53 | 2163 |
| George/Umatilla | 04:17:54 | -33.5 | Dark | Down | 36.2 | 13.2 | Up | 04:02:54 - 04:32:54 | 2162 |
| North Lake | 04:17:58 | -32.9 | Dark | Down | 33.3 | 12.4 | Up | 04:02:58 - 04:32:58 | 2151 |
| Tulelake | 04:18:01 | -32.6 | Dark | Down | 32.0 | 12.1 | Up | 04:03:01 - 04:33:01 | 2139 |
| PNWRO | 04:17:53 | -33.8 | Dark | Down | 36.3 | 13.3 | Up | 04:02:53 - 04:32:53 | 2136 |
| Paisley | 04:17:59 | -33.2 | Dark | Down | 32.9 | 12.4 | Up | 04:02:59 - 04:32:59 | 2102 |
| Fall River/Burney | 04:18:02 | -32.8 | Dark | Down | 31.1 | 12.0 | Up | 04:03:02 - 04:33:02 | 2095 |
| Lakeview | 04:17:59 | -33.4 | Dark | Down | 32.4 | 12.4 | Up | 04:02:59 - 04:32:59 | 2066 |
| Cedarville | 04:18:00 | -33.7 | Dark | Down | 31.8 | 12.4 | Up | 04:03:00 - 04:33:00 | 2025 |
| Greenville | 04:18:03 | -33.3 | Dark | Down | 30.3 | 12.0 | Up | 04:03:03 - 04:33:03 | 2025 |
| Gimple | 04:18:03 | -33.3 | Dark | Down | 30.3 | 12.0 | Up | 04:03:03 - 04:33:03 | 2018 |
| Quincy | 04:18:03 | -33.3 | Dark | Down | 30.1 | 12.0 | Up | 04:03:03 - 04:33:03 | 2016 |
| Susanville | 04:18:02 | -33.5 | Dark | Down | 30.6 | 12.1 | Up | 04:03:02 - 04:33:02 | 2014 |
| Portola | 04:18:03 | -33.7 | Dark | Down | 30.0 | 12.1 | Up | 04:03:03 - 04:33:03 | 1975 |
| Reno | 04:18:02 | -34.2 | Dark | Down | 29.9 | 12.2 | Low | 04:03:02 - 04:33:02 | 1915 |
| Carson City | 04:18:03 | -34.3 | Dark | Down | 29.5 | 12.1 | Low | 04:03:03 - 04:33:03 | 1899 |
| Gardnerville | 04:18:03 | -34.3 | Dark | Down | 29.3 | 12.1 | Low | 04:03:03 - 04:33:03 | 1885 |
| Yerington | 04:18:02 | -34.8 | Dark | Down | 29.5 | 12.2 | Low | 04:03:02 - 04:33:02 | 1843 |
| CPSLO | 04:18:08 | -33.9 | Dark | Down | 25.6 | 11.6 | Low | 04:03:08 - 04:33:08 | 1811 |
| Lee Vining | 04:18:03 | -34.9 | Dark | Down | 28.5 | 12.1 | Low | 04:03:03 - 04:33:03 | 1797 |
| Hawthorne | 04:18:02 | -35.2 | Dark | Down | 29.1 | 12.3 | Low | 04:03:02 - 04:33:02 | 1783 |
| Bishop | 04:18:03 | -35.6 | Dark | Down | 28.0 | 12.2 | Low | 04:03:03 - 04:33:03 | 1717 |
| Lone Pine | 04:18:04 | -35.9 | Dark | Down | 27.3 | 12.2 | Low | 04:03:04 - 04:33:04 | 1659 |
| Tonopah | 04:18:01 | -36.4 | Dark | Down | 28.9 | 12.5 | Low | 04:03:01 - 04:33:01 | 1658 |
| Wildwood | 04:18:07 | -35.7 | Dark | Down | 24.8 | 11.8 | Low | 04:03:07 - 04:33:07 | 1600 |
| Beatty | 04:18:01 | -36.9 | Dark | Down | 27.8 | 12.5 | Low | 04:03:01 - 04:33:01 | 1574 |
| Indian Springs | 04:18:00 | -37.8 | Dark | Down | 27.7 | 12.6 | Low | 04:03:00 - 04:33:00 | 1478 |
| Idyllwild | 04:18:05 | -37.3 | Dark | Down | 24.7 | 12.1 | Low | 04:03:05 - 04:33:05 | 1436 |
| Henderson | 04:18:00 | -38.4 | Dark | Down | 27.3 | 12.7 | Low | 04:03:00 - 04:33:00 | 1403 |
| Searchlight/Boulder City | 04:18:01 | -38.6 | Dark | Down | 26.7 | 12.6 | Low | 04:03:01 - 04:33:01 | 1373 |
| Laughlin/Bullhead City | 04:18:00 | -38.9 | Dark | Down | 26.5 | 12.7 | Low | 04:03:00 - 04:33:00 | 1334 |
| Mohave Valley | 04:18:01 | -38.9 | Dark | Down | 26.2 | 12.6 | Low | 04:03:01 - 04:33:01 | 1322 |
| Calipatria | 04:18:03 | -38.3 | Dark | Down | 24.4 | 12.3 | Low | 04:03:03 - 04:33:03 | 1320 |
| Kingman/Dolan Springs | 04:17:59 | -39.3 | Dark | Down | 26.6 | 12.8 | Low | 04:02:59 - 04:32:59 | 1296 |
| Patrick | 04:17:59 | -39.4 | Dark | Down | 26.9 | 12.8 | Low | 04:02:59 - 04:32:59 | 1292 |
| Lake Havasu City | 04:18:01 | -39.2 | Dark | Down | 25.9 | 12.6 | Low | 04:03:01 - 04:33:01 | 1286 |
| Blythe | 04:18:01 | -39.0 | Dark | Down | 25.0 | 12.5 | Low | 04:03:01 - 04:33:01 | 1269 |
| Parker | 04:18:01 | -39.2 | Dark | Down | 25.6 | 12.6 | Low | 04:03:01 - 04:33:01 | 1268 |
| Yuma | 04:18:02 | -39.1 | Dark | Down | 24.1 | 12.4 | Low | 04:03:02 - 04:33:02 | 1232 |
| DCO | 04:17:58 | -40.0 | Dark | Down | 26.7 | 12.9 | Low | 04:02:58 - 04:32:58 | 1226 |
| Niwot | 04:17:42 | -45.0 | Dark | Up | 33.1 | 14.9 | Up | 04:02:42 - 04:32:42 | 939 |
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, (2018/02/04 04:16UT) Object RA Dec mag sep mel Deneb 20:41:25.9 +45:16:49 1.3 48.89 112 Kochab 14:50:42.2 +74:09:20 2.1 3.94 75 4 UMi 14:08:50.7 +77:32:52 4.8 1.57 77 PPM 008502 13:49:32.9 +75:34:01 8.0 0.73 74 PPM 008523 13:54:45.5 +76:15:51 9.6 0.21 75 11MM4 13:57:15.4 +76:07:19 12.9 75 Positions are for J2000
Event circumstances last updated at 2017/05/17 18:00:28 UT
Marc W. Buie, Southwest Research Institute