Event between (434194) 03FK127 and star UC4-447-053664 with event index number of 73969
Geocentric closest approach at 2017/04/21 08:02:50 UTC
J2000 position of star is 12:29:01.6 -00:40:17
Equinox of date position of star is 12:29:51.5 -00:45:40
Stellar brightness R=15.9
Star is 137 degrees from the moon.
Moon is 31% illuminated.
TNO apparent brightness V=23.4
[RECON map]
TNO is 40.6 AU from the Sun
and 39.6 AU from the Earth.
The TNO is moving 22.4
km/sec on the sky relative to the star, or,
2.8 arcsec/hr.
The 1-sigma error in the time of the event is 153 seconds.
The 1-sigma cross-track error in the shadow position is
2678 km.
The TNO has an absolute magnitude Hv=7.3
Diameter=208.9 km assuming a 5% albedo -- 9.3 sec chord
Diameter=85.3 km assuming a 30% albedo -- 3.8 sec chord
Dynamical classification is CLASSICAL
Star training set for 434194, (2017/04/21 08:03UT) Object RA Dec mag sep mel Spica 13:26:06.4 -11:15:04 1.0 17.45 120 Vindemiatrix 13:03:02.3 +10:51:59 2.8 14.25 131 15Eta Vir 12:20:47.5 -00:45:46 3.9 2.28 139 PPM 178782 12:26:33.7 -00:22:40 8.4 0.92 138 PPM 178795 12:29:17.5 -01:17:39 9.6 0.55 137 PPM 178802 12:30:34.8 -00:45:08 10.7 0.17 136 434194 12:29:54.9 -00:46:01 15.9 136 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 12.6 km
RECON observability=1.0 and success probability=8.5%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Oroville | 08:03:02 | -29.1 | Dark | Down | 36.4 | 209.9 | Up | 07:49:48 - 08:16:17 | -1550 |
| Tonasket | 08:03:01 | -29.3 | Dark | Down | 36.6 | 210.0 | Up | 07:49:47 - 08:16:16 | -1562 |
| Okanogan | 08:03:00 | -29.7 | Dark | Down | 36.9 | 209.9 | Up | 07:49:46 - 08:16:15 | -1585 |
| Brewster | 08:03:00 | -29.9 | Dark | Down | 37.2 | 209.8 | Up | 07:49:46 - 08:16:15 | -1605 |
| Manson/Chelan | 08:03:02 | -30.1 | Dark | Down | 37.5 | 209.4 | Up | 07:49:47 - 08:16:16 | -1626 |
| Entiat | 08:03:01 | -30.4 | Dark | Down | 37.7 | 209.4 | Up | 07:49:46 - 08:16:15 | -1640 |
| Wenatchee | 08:03:01 | -30.6 | Dark | Down | 38.0 | 209.4 | Up | 07:49:46 - 08:16:15 | -1657 |
| Ellensburg | 08:03:00 | -31.0 | Dark | Down | 38.4 | 209.3 | Up | 07:49:46 - 08:16:15 | -1686 |
| Yakima | 08:02:59 | -31.4 | Dark | Down | 38.8 | 209.4 | Up | 07:49:45 - 08:16:14 | -1710 |
| Toppenish/White Swan | 08:02:58 | -31.7 | Dark | Down | 38.9 | 209.7 | Up | 07:49:43 - 08:16:12 | -1719 |
| Pasco | 08:02:54 | -31.8 | Dark | Down | 38.6 | 211.3 | Up | 07:49:40 - 08:16:09 | -1693 |
| PNWRO | 08:02:52 | -32.0 | Dark | Down | 38.7 | 211.6 | Up | 07:49:38 - 08:16:07 | -1702 |
| George/Umatilla | 08:02:54 | -32.1 | Dark | Down | 38.9 | 211.1 | Up | 07:49:40 - 08:16:09 | -1719 |
| Goldendale | 08:02:58 | -32.2 | Dark | Down | 39.5 | 209.4 | Up | 07:49:44 - 08:16:13 | -1762 |
| The Dalles | 08:02:59 | -32.4 | Dark | Down | 39.9 | 209.1 | Up | 07:49:45 - 08:16:14 | -1786 |
| Maupin | 08:02:57 | -32.9 | Dark | Down | 40.2 | 209.3 | Up | 07:49:43 - 08:16:12 | -1808 |
| Madras/Culver | 08:02:56 | -33.4 | Dark | Down | 40.7 | 209.5 | Up | 07:49:42 - 08:16:11 | -1843 |
| Sisters | 08:02:57 | -33.7 | Dark | Down | 41.1 | 209.1 | Up | 07:49:42 - 08:16:11 | -1876 |
| Redmond | 08:02:56 | -33.8 | Dark | Down | 41.0 | 209.6 | Up | 07:49:41 - 08:16:10 | -1866 |
| Bend | 08:02:55 | -34.0 | Dark | Down | 41.2 | 209.5 | Up | 07:49:41 - 08:16:10 | -1883 |
| Oregon Observatory | 08:02:55 | -34.2 | Dark | Down | 41.4 | 209.4 | Up | 07:49:41 - 08:16:10 | -1898 |
| LaPine/Gilchrist | 08:02:55 | -34.4 | Dark | Down | 41.6 | 209.4 | Up | 07:49:41 - 08:16:10 | -1912 |
| North Lake | 08:02:52 | -34.8 | Dark | Down | 41.8 | 210.4 | Up | 07:49:38 - 08:16:07 | -1923 |
| Paisley | 08:02:50 | -35.3 | Dark | Down | 42.1 | 211.1 | Up | 07:49:35 - 08:16:04 | -1949 |
| Chiloquin | 08:02:53 | -35.5 | Dark | Down | 42.7 | 209.5 | Up | 07:49:39 - 08:16:08 | -1993 |
| Klamath Falls | 08:02:52 | -35.8 | Dark | Down | 43.0 | 209.7 | Up | 07:49:37 - 08:16:06 | -2014 |
| Lakeview | 08:02:48 | -35.8 | Dark | Down | 42.5 | 211.5 | Up | 07:49:33 - 08:16:02 | -1976 |
| Tulelake | 08:02:50 | -36.1 | Dark | Down | 43.1 | 210.2 | Up | 07:49:35 - 08:16:04 | -2023 |
| Cedarville | 08:02:45 | -36.5 | Dark | Down | 43.0 | 212.1 | Up | 07:49:30 - 08:15:59 | -2014 |
| Fall River/Burney | 08:02:48 | -37.0 | Dark | Down | 43.9 | 210.8 | Up | 07:49:34 - 08:16:03 | -2081 |
| Susanville | 08:02:45 | -37.6 | Dark | Down | 44.1 | 212.0 | Up | 07:49:30 - 08:15:59 | -2102 |
| Greenville | 08:02:45 | -37.9 | Dark | Down | 44.5 | 211.8 | Up | 07:49:30 - 08:15:59 | -2130 |
| Niwot | 08:01:57 | -35.9 | Dark | Down | 36.7 | 229.6 | Up | 07:48:42 - 08:15:11 | -1710 |
| Quincy | 08:02:44 | -38.1 | Dark | Down | 44.7 | 211.9 | Up | 07:49:30 - 08:15:59 | -2143 |
| Portola | 08:02:42 | -38.2 | Dark | Down | 44.6 | 212.6 | Up | 07:49:28 - 08:15:57 | -2138 |
| Reno | 08:02:40 | -38.5 | Dark | Down | 44.5 | 213.5 | Up | 07:49:26 - 08:15:55 | -2138 |
| Carson City | 08:02:39 | -38.8 | Dark | Down | 44.8 | 213.7 | Up | 07:49:24 - 08:15:53 | -2162 |
| Yerington | 08:02:37 | -39.0 | Dark | Down | 44.7 | 214.6 | Up | 07:49:22 - 08:15:51 | -2157 |
| Gardnerville | 08:02:38 | -39.1 | Dark | Down | 45.0 | 213.9 | Up | 07:49:24 - 08:15:53 | -2177 |
| Hawthorne | 08:02:34 | -39.5 | Dark | Down | 44.9 | 215.6 | Up | 07:49:19 - 08:15:48 | -2174 |
| Lee Vining | 08:02:34 | -40.0 | Dark | Down | 45.5 | 215.3 | Up | 07:49:19 - 08:15:48 | -2227 |
| Tonopah | 08:02:28 | -39.9 | Dark | Down | 44.6 | 217.6 | Up | 07:49:13 - 08:15:42 | -2165 |
| Bishop | 08:02:30 | -40.6 | Dark | Down | 45.7 | 216.5 | Up | 07:49:16 - 08:15:45 | -2248 |
| Lone Pine | 08:02:27 | -41.4 | Dark | Down | 46.2 | 217.4 | Up | 07:49:12 - 08:15:41 | -2293 |
| Beatty | 08:02:23 | -41.0 | Dark | Down | 45.3 | 218.8 | Up | 07:49:08 - 08:15:37 | -2234 |
| Indian Springs | 08:02:18 | -41.2 | Dark | Down | 45.0 | 220.3 | Up | 07:49:04 - 08:15:33 | -2225 |
| Henderson | 08:02:15 | -41.7 | Dark | Down | 45.0 | 221.5 | Up | 07:49:00 - 08:15:29 | -2244 |
| Searchlight/Boulder City | 08:02:13 | -42.2 | Dark | Down | 45.4 | 221.9 | Up | 07:48:58 - 08:15:27 | -2283 |
| CPSLO | 08:02:32 | -42.7 | Dark | Down | 48.4 | 214.9 | Up | 07:49:18 - 08:15:47 | -2467 |
| Kingman/Dolan Springs | 08:02:09 | -42.4 | Dark | Down | 45.2 | 223.1 | Up | 07:48:54 - 08:15:23 | -2278 |
| Laughlin/Bullhead City | 08:02:11 | -42.5 | Dark | Down | 45.5 | 222.5 | Up | 07:48:56 - 08:15:25 | -2295 |
| DCO | 08:02:06 | -42.4 | Dark | Down | 44.7 | 224.2 | Up | 07:48:52 - 08:15:21 | -2258 |
| Mohave Valley | 08:02:10 | -42.8 | Dark | Down | 45.7 | 222.7 | Up | 07:48:56 - 08:15:25 | -2315 |
| Lake Havasu City | 08:02:09 | -43.1 | Dark | Down | 45.8 | 223.3 | Up | 07:48:54 - 08:15:23 | -2336 |
| Parker | 08:02:07 | -43.5 | Dark | Down | 46.1 | 223.6 | Up | 07:48:53 - 08:15:22 | -2362 |
| Idyllwild | 08:02:14 | -44.1 | Dark | Down | 47.7 | 221.0 | Up | 07:48:59 - 08:15:28 | -2463 |
| Blythe | 08:02:07 | -44.0 | Dark | Down | 46.6 | 223.6 | Up | 07:48:52 - 08:15:21 | -2409 |
| Calipatria | 08:02:09 | -44.6 | Dark | Down | 47.5 | 222.8 | Up | 07:48:54 - 08:15:23 | -2474 |
| Yuma | 08:02:05 | -45.0 | Dark | Down | 47.3 | 224.2 | Up | 07:48:50 - 08:15:19 | -2480 |
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 2016/03/20 17:20:46 UT
Marc W. Buie, Southwest Research Institute