Event between (120347) Salacia and star UC4-561-142104 with event index number of 170315
Geocentric closest approach at 2018/12/27 04:08:47 UTC
J2000 position of star is 23:24:24.9 +22:06:10
Equinox of date position of star is 23:25:18.7 +22:12:05
Stellar brightness R=16.0,
use SENSEUP=128
Star is 144 degrees from the moon.
Moon is 74% illuminated.
TNO apparent brightness V=20.8
[RECON map]
TNO is 44.8 AU from the Sun
and 44.9 AU from the Earth.
The TNO is moving 13.5
km/sec on the sky relative to the star, or,
1.5 arcsec/hr.
The 1-sigma error in the time of the event is 342 seconds.
The 1-sigma cross-track error in the shadow position is
3327 km.
The sky-plane scale is
32554.1 km/arcsec.
The TNO has an absolute magnitude Hv=4.1
Diameter=912.0 km assuming a 5% albedo -- 67.5 sec chord
Diameter=372.3 km assuming a 30% albedo -- 27.6 sec chord
Dynamical classification is SCATEXTD
Star training set for 120347, (2018/12/27 04:09UT) Object RA Dec mag sep mel Deneb 20:42:04.8 +45:20:56 1.3 40.42 117 Scheat 23:04:41.8 +28:11:10 2.4 7.59 139 68Ups Peg 23:26:19.8 +23:30:32 4.4 1.32 142 PPM 115444 23:25:15.5 +21:31:02 7.9 0.69 144 PPM 115432 23:24:29.3 +21:54:27 9.9 0.36 144 PPM 115452 23:25:28.3 +22:19:33 10.7 0.12 144 120347 23:25:21.7 +22:12:26 16.0 143 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
2.6 sigma about the mid-time.
The median site spacing is 5.5 km
RECON observability=1.0 and success probability=8.0%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Niwot | 04:11:00 | -50.5 | Dark | Down | 35.0 | 270.6 | Up | 03:56:00 - 04:26:00 | -1316 |
| Oroville | 04:09:28 | -38.7 | Dark | Down | 44.1 | 251.7 | Up | 03:54:28 - 04:24:28 | -1685 |
| Tonasket | 04:09:29 | -38.7 | Dark | Down | 44.1 | 251.9 | Up | 03:54:29 - 04:24:29 | -1693 |
| Okanogan | 04:09:33 | -38.7 | Dark | Down | 44.3 | 252.1 | Up | 03:54:33 - 04:24:33 | -1712 |
| Brewster | 04:09:34 | -38.6 | Dark | Down | 44.5 | 252.2 | Up | 03:54:34 - 04:24:34 | -1731 |
| Manson/Chelan | 04:09:34 | -38.3 | Dark | Down | 44.8 | 252.0 | Up | 03:54:34 - 04:24:34 | -1756 |
| PNWRO | 04:09:52 | -39.5 | Dark | Down | 44.5 | 255.1 | Up | 03:54:52 - 04:24:52 | -1765 |
| Pasco | 04:09:50 | -39.3 | Dark | Down | 44.6 | 254.6 | Up | 03:54:50 - 04:24:50 | -1766 |
| Entiat | 04:09:35 | -38.3 | Dark | Down | 44.9 | 252.2 | Up | 03:54:35 - 04:24:35 | -1768 |
| Wenatchee | 04:09:38 | -38.3 | Dark | Down | 45.1 | 252.3 | Up | 03:54:38 - 04:24:38 | -1781 |
| George/Umatilla | 04:09:52 | -39.2 | Dark | Down | 44.8 | 254.7 | Up | 03:54:52 - 04:24:52 | -1790 |
| Ellensburg | 04:09:41 | -38.2 | Dark | Down | 45.3 | 252.5 | Up | 03:54:41 - 04:24:41 | -1808 |
| Yakima | 04:09:44 | -38.2 | Dark | Down | 45.5 | 252.9 | Up | 03:54:44 - 04:24:44 | -1824 |
| Toppenish/White Swan | 04:09:46 | -38.4 | Dark | Down | 45.4 | 253.3 | Up | 03:54:46 - 04:24:46 | -1824 |
| Goldendale | 04:09:49 | -38.1 | Dark | Down | 45.8 | 253.5 | Up | 03:54:49 - 04:24:49 | -1866 |
| The Dalles | 04:09:50 | -37.9 | Dark | Down | 46.1 | 253.4 | Up | 03:54:50 - 04:24:50 | -1893 |
| Maupin | 04:09:54 | -38.0 | Dark | Down | 46.2 | 253.9 | Up | 03:54:54 - 04:24:54 | -1905 |
| DCO | 04:11:27 | -44.9 | Dark | Down | 41.3 | 269.7 | Up | 03:56:27 - 04:26:27 | -1927 |
| Madras/Culver | 04:09:56 | -38.0 | Dark | Down | 46.3 | 254.4 | Up | 03:54:56 - 04:24:56 | -1930 |
| Redmond | 04:10:00 | -38.0 | Dark | Down | 46.5 | 254.7 | Up | 03:55:00 - 04:25:00 | -1947 |
| Patrick | 04:11:23 | -44.3 | Dark | Down | 41.9 | 269.0 | Up | 03:56:23 - 04:26:23 | -1952 |
| Bend | 04:10:01 | -38.0 | Dark | Down | 46.6 | 254.8 | Up | 03:55:01 - 04:25:01 | -1963 |
| Sisters | 04:09:59 | -37.7 | Dark | Down | 46.7 | 254.4 | Up | 03:54:59 - 04:24:59 | -1966 |
| Kingman/Dolan Springs | 04:11:23 | -44.1 | Dark | Down | 42.0 | 269.1 | Up | 03:56:23 - 04:26:23 | -1973 |
| North Lake | 04:10:08 | -38.3 | Dark | Down | 46.5 | 256.1 | Up | 03:55:08 - 04:25:08 | -1976 |
| Oregon Observatory | 04:10:02 | -37.9 | Dark | Down | 46.8 | 254.9 | Up | 03:55:02 - 04:25:02 | -1977 |
| Paisley | 04:10:14 | -38.6 | Dark | Down | 46.4 | 257.0 | Up | 03:55:14 - 04:25:14 | -1981 |
| Henderson | 04:11:16 | -43.3 | Dark | Down | 42.8 | 267.8 | Up | 03:56:16 - 04:26:16 | -1983 |
| La Pine/Gilchrist | 04:10:04 | -37.8 | Dark | Down | 46.8 | 255.1 | Up | 03:55:04 - 04:25:04 | -1989 |
| Lakeview | 04:10:18 | -38.8 | Dark | Down | 46.3 | 257.7 | Up | 03:55:18 - 04:25:18 | -1993 |
| Indian Springs | 04:11:11 | -42.8 | Dark | Down | 43.3 | 266.8 | Up | 03:56:11 - 04:26:11 | -1996 |
| Laughlin/Bullhead City | 04:11:23 | -43.7 | Dark | Down | 42.4 | 268.8 | Up | 03:56:23 - 04:26:23 | -2002 |
| Searchlight/Boulder City | 04:11:20 | -43.4 | Dark | Down | 42.7 | 268.3 | Up | 03:56:20 - 04:26:20 | -2007 |
| Tonopah | 04:10:56 | -41.5 | Dark | Down | 44.5 | 264.3 | Up | 03:55:56 - 04:25:56 | -2011 |
| Cedarville | 04:10:22 | -39.0 | Dark | Down | 46.3 | 258.5 | Up | 03:55:22 - 04:25:22 | -2013 |
| Mohave Valley | 04:11:26 | -43.7 | Dark | Down | 42.4 | 269.1 | Up | 03:56:26 - 04:26:26 | -2015 |
| Lake Havasu City | 04:11:30 | -43.9 | Dark | Down | 42.2 | 269.6 | Up | 03:56:30 - 04:26:30 | -2021 |
| Parker | 04:11:32 | -44.0 | Dark | Down | 42.2 | 269.9 | Up | 03:56:32 - 04:26:32 | -2036 |
| Beatty | 04:11:06 | -41.9 | Dark | Down | 44.2 | 265.8 | Up | 03:56:06 - 04:26:06 | -2040 |
| Chiloquin | 04:10:10 | -37.6 | Dark | Down | 47.4 | 255.9 | Up | 03:55:10 - 04:25:10 | -2056 |
| Tulelake | 04:10:17 | -38.0 | Dark | Down | 47.2 | 256.9 | Up | 03:55:17 - 04:25:17 | -2063 |
| Hawthorne | 04:10:50 | -40.3 | Dark | Down | 45.6 | 262.8 | Up | 03:55:50 - 04:25:50 | -2067 |
| Klamath Falls | 04:10:14 | -37.7 | Dark | Down | 47.4 | 256.4 | Up | 03:55:14 - 04:25:14 | -2067 |
| Yerington | 04:10:45 | -39.9 | Dark | Down | 45.9 | 261.9 | Up | 03:55:45 - 04:25:45 | -2074 |
| Blythe | 04:11:35 | -43.7 | Dark | Down | 42.4 | 270.3 | Up | 03:56:35 - 04:26:35 | -2079 |
| Reno | 04:10:38 | -39.3 | Dark | Down | 46.4 | 260.9 | Up | 03:55:38 - 04:25:38 | -2084 |
| Susanville | 04:10:30 | -38.7 | Dark | Down | 46.9 | 259.3 | Up | 03:55:30 - 04:25:30 | -2089 |
| Carson City | 04:10:42 | -39.4 | Dark | Down | 46.4 | 261.3 | Up | 03:55:42 - 04:25:42 | -2099 |
| Fall River/Burney | 04:10:24 | -38.1 | Dark | Down | 47.3 | 258.0 | Up | 03:55:24 - 04:25:24 | -2100 |
| Portola | 04:10:36 | -38.8 | Dark | Down | 46.8 | 260.1 | Up | 03:55:36 - 04:25:36 | -2107 |
| Gardnerville | 04:10:44 | -39.4 | Dark | Down | 46.4 | 261.6 | Up | 03:55:44 - 04:25:44 | -2108 |
| Bishop | 04:10:59 | -40.5 | Dark | Down | 45.5 | 264.2 | Up | 03:55:59 - 04:25:59 | -2109 |
| Gimple | 04:10:32 | -38.5 | Dark | Down | 47.1 | 259.4 | Up | 03:55:32 - 04:25:32 | -2113 |
| Greenville | 04:10:32 | -38.4 | Dark | Down | 47.1 | 259.3 | Up | 03:55:32 - 04:25:32 | -2118 |
| Lee Vining | 04:10:52 | -39.9 | Dark | Down | 46.0 | 263.1 | Up | 03:55:52 - 04:25:52 | -2120 |
| Quincy | 04:10:33 | -38.5 | Dark | Down | 47.2 | 259.6 | Up | 03:55:33 - 04:25:33 | -2127 |
| Lone Pine | 04:11:05 | -40.8 | Dark | Down | 45.3 | 265.2 | Up | 03:56:05 - 04:26:05 | -2127 |
| Yuma | 04:11:41 | -43.7 | Dark | Down | 42.4 | 271.1 | Up | 03:56:41 - 04:26:41 | -2128 |
| Calipatria | 04:11:37 | -42.9 | Dark | Down | 43.2 | 270.2 | Up | 03:56:37 - 04:26:37 | -2157 |
| Idyllwild | 04:11:30 | -41.9 | Dark | Down | 44.2 | 268.9 | Up | 03:56:30 - 04:26:30 | -2194 |
| Wildwood | 04:11:23 | -40.4 | Dark | Down | 45.8 | 267.5 | Up | 03:56:23 - 04:26:23 | -2284 |
| CPSLO | 04:11:07 | -38.7 | Dark | Down | 47.5 | 264.8 | Up | 03:56:07 - 04:26:07 | -2340 |
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 120347, (2018/12/27 04:09UT) Object RA Dec mag sep mel Deneb 20:41:25.9 +45:16:49 1.3 40.42 117 Scheat 23:03:46.7 +28:05:01 2.4 7.59 139 68Ups Peg 23:25:23.0 +23:24:15 4.4 1.32 142 PPM 115444 23:24:18.7 +21:24:46 7.9 0.69 144 PPM 115432 23:23:32.5 +21:48:12 9.9 0.36 144 PPM 115452 23:24:31.5 +22:13:17 10.7 0.12 144 120347 23:24:24.9 +22:06:10 16.0 144 Positions are for J2000
Event circumstances last updated at 2017/12/16 18:28:22 UT
Marc W. Buie, Southwest Research Institute