Event between 04MT8 and star UC4-344-192243 with event index number of 98420
Geocentric closest approach at 2017/09/20 06:20:35 UTC
J2000 position of star is 20:10:58.7 -21:20:11
Equinox of date position of star is 20:11:55.6 -21:17:15
Stellar brightness R=16.5
Star is 122 degrees from the moon.
Moon is 0% illuminated.
TNO apparent brightness V=23.2
[RECON map]
TNO is 44.9 AU from the Sun
and 44.4 AU from the Earth.
The TNO is moving 11.4
km/sec on the sky relative to the star, or,
1.3 arcsec/hr.
The 1-sigma error in the time of the event is 1560 seconds.
The 1-sigma cross-track error in the shadow position is
3434 km.
The TNO has an absolute magnitude Hv=6.6
Diameter=291.1 km assuming a 5% albedo -- 25.5 sec chord
Diameter=118.8 km assuming a 30% albedo -- 10.4 sec chord
Dynamical classification is CLASSICAL
Star training set for 04MT8, (2017/09/20 06:21UT) Object RA Dec mag sep mel Fomalhaut 22:58:37.5 -29:31:41 1.2 38.31 150 38Zet Sgr 19:03:44.2 -29:51:12 2.7 17.59 106 4 Cap 20:19:03.7 -21:45:14 5.9 1.71 124 PPM 270794 20:11:54.0 -21:15:00 8.2 0.04 122 04MT8 20:12:00.9 -21:16:58 16.5 123 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
5.0 sigma about the mid-time.
The median site spacing is 20.9 km
RECON observability=0.6 and success probability=6.1%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Oroville | 06:15:56 | -36.0 | Dark | Down | 14.4 | 209.8 | Really Low | 04:05:28 - 08:26:24 | -1964 |
| Tonasket | 06:15:55 | -36.2 | Dark | Down | 14.6 | 209.9 | Really Low | 04:05:27 - 08:26:23 | -1976 |
| Okanogan | 06:15:55 | -36.4 | Dark | Down | 15.0 | 209.8 | Really Low | 04:05:27 - 08:26:23 | -1989 |
| Brewster | 06:15:55 | -36.6 | Dark | Down | 15.3 | 209.6 | Really Low | 04:05:27 - 08:26:23 | -1997 |
| Manson/Chelan | 06:15:56 | -36.7 | Dark | Down | 15.6 | 209.3 | Really Low | 04:05:28 - 08:26:24 | -1998 |
| Entiat | 06:15:56 | -36.8 | Dark | Down | 15.8 | 209.3 | Really Low | 04:05:28 - 08:26:24 | -2008 |
| Wenatchee | 06:15:56 | -37.0 | Dark | Down | 16.1 | 209.2 | Really Low | 04:05:28 - 08:26:24 | -2018 |
| Ellensburg | 06:15:55 | -37.3 | Dark | Down | 16.5 | 209.1 | Really Low | 04:05:27 - 08:26:23 | -2034 |
| Yakima | 06:15:55 | -37.6 | Dark | Down | 16.9 | 209.1 | Really Low | 04:05:27 - 08:26:23 | -2054 |
| Toppenish/White Swan | 06:15:53 | -37.9 | Dark | Down | 17.0 | 209.3 | Really Low | 04:05:25 - 08:26:21 | -2070 |
| Pasco | 06:15:46 | -38.4 | Dark | Down | 16.7 | 210.4 | Really Low | 04:05:18 - 08:26:14 | -2109 |
| PNWRO | 06:15:44 | -38.7 | Dark | Down | 16.8 | 210.7 | Really Low | 04:05:16 - 08:26:12 | -2128 |
| George/Umatilla | 06:15:45 | -38.6 | Dark | Down | 17.0 | 210.3 | Really Low | 04:05:17 - 08:26:13 | -2121 |
| Goldendale | 06:15:53 | -38.2 | Dark | Down | 17.6 | 209.0 | Really Low | 04:05:25 - 08:26:21 | -2088 |
| The Dalles | 06:15:55 | -38.2 | Dark | Down | 17.9 | 208.7 | Really Low | 04:05:27 - 08:26:23 | -2091 |
| Maupin | 06:15:54 | -38.6 | Dark | Down | 18.3 | 208.9 | Really Low | 04:05:26 - 08:26:22 | -2116 |
| Madras/Culver | 06:15:52 | -39.0 | Dark | Down | 18.8 | 208.9 | Really Low | 04:05:24 - 08:26:20 | -2145 |
| Sisters | 06:15:53 | -39.1 | Dark | Down | 19.2 | 208.6 | Really Low | 04:05:25 - 08:26:21 | -2151 |
| Redmond | 06:15:52 | -39.3 | Dark | Down | 19.1 | 208.9 | Really Low | 04:05:24 - 08:26:20 | -2163 |
| Bend | 06:15:52 | -39.4 | Dark | Down | 19.3 | 208.8 | Really Low | 04:05:24 - 08:26:20 | -2171 |
| Oregon Observatory | 06:15:52 | -39.5 | Dark | Down | 19.5 | 208.7 | Really Low | 04:05:24 - 08:26:20 | -2177 |
| LaPine/Gilchrist | 06:15:52 | -39.7 | Dark | Down | 19.7 | 208.7 | Really Low | 04:05:24 - 08:26:20 | -2187 |
| North Lake | 06:15:48 | -40.3 | Dark | Down | 19.9 | 209.3 | Really Low | 04:05:20 - 08:26:16 | -2228 |
| Paisley | 06:15:44 | -40.9 | Dark | Down | 20.3 | 209.7 | Low | 04:05:16 - 08:26:12 | -2269 |
| Chiloquin | 06:15:52 | -40.4 | Dark | Down | 20.8 | 208.6 | Low | 04:05:24 - 08:26:20 | -2241 |
| Klamath Falls | 06:15:49 | -40.7 | Dark | Down | 21.1 | 208.7 | Low | 04:05:21 - 08:26:17 | -2263 |
| Lakeview | 06:15:42 | -41.4 | Dark | Down | 20.6 | 210.0 | Low | 04:05:14 - 08:26:10 | -2304 |
| Tulelake | 06:15:48 | -41.1 | Dark | Down | 21.2 | 209.0 | Low | 04:05:20 - 08:26:16 | -2287 |
| Cedarville | 06:15:39 | -42.0 | Dark | Down | 21.1 | 210.3 | Low | 04:05:11 - 08:26:07 | -2348 |
| Fall River/Burney | 06:15:45 | -41.9 | Dark | Down | 22.0 | 209.3 | Low | 04:05:17 - 08:26:13 | -2344 |
| Susanville | 06:15:40 | -42.7 | Dark | Down | 22.3 | 210.1 | Low | 04:05:12 - 08:26:08 | -2402 |
| Greenville | 06:15:41 | -42.8 | Dark | Down | 22.6 | 209.9 | Low | 04:05:13 - 08:26:09 | -2411 |
| Niwot | 06:14:15 | -47.9 | Dark | Down | 15.6 | 223.1 | Really Low | 04:03:47 - 08:24:43 | -2885 |
| Quincy | 06:15:40 | -43.0 | Dark | Down | 22.8 | 209.9 | Low | 04:05:12 - 08:26:08 | -2424 |
| Portola | 06:15:37 | -43.3 | Dark | Down | 22.7 | 210.4 | Low | 04:05:09 - 08:26:05 | -2445 |
| Reno | 06:15:33 | -43.8 | Dark | Down | 22.7 | 211.0 | Low | 04:05:05 - 08:26:01 | -2480 |
| Carson City | 06:15:31 | -44.1 | Dark | Down | 23.0 | 211.1 | Low | 04:05:03 - 08:25:59 | -2503 |
| Yerington | 06:15:27 | -44.5 | Dark | Down | 22.9 | 211.7 | Low | 04:04:59 - 08:25:55 | -2534 |
| Gardnerville | 06:15:31 | -44.3 | Dark | Down | 23.2 | 211.2 | Low | 04:05:03 - 08:25:59 | -2520 |
| Hawthorne | 06:15:24 | -45.1 | Dark | Down | 23.1 | 212.3 | Low | 04:04:56 - 08:25:52 | -2579 |
| Lee Vining | 06:15:26 | -45.4 | Dark | Down | 23.8 | 212.0 | Low | 04:04:58 - 08:25:54 | -2601 |
| Tonopah | 06:15:13 | -46.1 | Dark | Down | 22.9 | 213.6 | Low | 04:04:45 - 08:25:41 | -2651 |
| Bishop | 06:15:19 | -46.2 | Dark | Down | 24.0 | 212.7 | Low | 04:04:51 - 08:25:47 | -2662 |
| Lone Pine | 06:15:16 | -46.9 | Dark | Down | 24.5 | 213.2 | Low | 04:04:48 - 08:25:44 | -2724 |
| Beatty | 06:15:09 | -47.2 | Dark | Down | 23.7 | 214.3 | Low | 04:04:41 - 08:25:37 | -2743 |
| Indian Springs | 06:15:00 | -48.0 | Dark | Down | 23.5 | 215.3 | Low | 04:04:32 - 08:25:28 | -2798 |
| Henderson | 06:14:55 | -48.7 | Dark | Down | 23.6 | 216.0 | Low | 04:04:27 - 08:25:23 | -2857 |
| Searchlight/Boulder City | 06:14:54 | -49.2 | Dark | Down | 24.0 | 216.2 | Low | 04:04:26 - 08:25:22 | -2899 |
| CPSLO | 06:15:29 | -46.8 | Dark | Down | 26.7 | 211.2 | Low | 04:05:01 - 08:25:57 | -2735 |
| Kingman/Dolan Springs | 06:14:49 | -49.8 | Dark | Down | 23.8 | 217.0 | Low | 04:04:21 - 08:25:17 | -2946 |
| Laughlin/Bullhead City | 06:14:52 | -49.6 | Dark | Down | 24.1 | 216.6 | Low | 04:04:24 - 08:25:20 | -2931 |
| DCO | 06:14:44 | -50.2 | Dark | Down | 23.5 | 217.8 | Low | 04:04:16 - 08:25:12 | -2980 |
| Mohave Valley | 06:14:51 | -49.9 | Dark | Down | 24.3 | 216.7 | Low | 04:04:23 - 08:25:19 | -2951 |
| Lake Havasu City | 06:14:49 | -50.3 | Dark | Down | 24.5 | 217.0 | Low | 04:04:21 - 08:25:17 | -2988 |
| Parker | 06:14:48 | -50.6 | Dark | Down | 24.8 | 217.1 | Low | 04:04:20 - 08:25:16 | -3014 |
| Idyllwild | 06:15:01 | -49.9 | Dark | Down | 26.3 | 215.1 | Low | 04:04:33 - 08:25:29 | -2966 |
| Blythe | 06:14:49 | -50.9 | Dark | Down | 25.4 | 217.0 | Low | 04:04:21 - 08:25:17 | -3043 |
| Calipatria | 06:14:54 | -50.9 | Dark | Down | 26.2 | 216.3 | Low | 04:04:26 - 08:25:22 | -3049 |
| Yuma | 06:14:47 | -51.7 | Dark | Down | 26.1 | 217.2 | Low | 04:04:19 - 08:25:15 | -3110 |
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.
Event circumstances last updated at 2016/03/14 18:00:50 UT
Marc W. Buie, Southwest Research Institute