Event between (471325) 11KT19 and star UC4-470-053131 with event index number of 144829
Geocentric closest approach at 2018/05/12 03:59:11 UTC
J2000 position of star is 15:53:06.4 +03:56:58
Equinox of date position of star is 15:54:00.1 +03:53:50
Stellar brightness R=12.6,
use SENSEUP=16
Star is 131 degrees from the moon.
Moon is 14% illuminated.
TNO apparent brightness V=21.6
[RECON map]
TNO is 27.4 AU from the Sun
and 26.5 AU from the Earth.
The TNO is moving 32.4
km/sec on the sky relative to the star, or,
6.1 arcsec/hr.
The 1-sigma error in the time of the event is 35 seconds.
The 1-sigma cross-track error in the shadow position is
1860 km.
The sky-plane scale is
19219.2 km/arcsec.
The TNO has an absolute magnitude Hv=7.2
Diameter=218.8 km assuming a 5% albedo -- 6.8 sec chord
Diameter=89.3 km assuming a 30% albedo -- 2.8 sec chord
Dynamical classification is CENTAURR
Star training set for 471325, (2018/05/12 03:59UT) Object RA Dec mag sep mel Arcturus 14:16:30.0 +19:05:16 0.0 28.24 150 Unukalhai 15:45:10.4 +06:22:08 2.6 3.31 133 37Eps Ser 15:51:44.0 +04:25:25 3.7 0.78 132 PPM 162038 15:55:36.4 +05:09:25 8.4 1.32 131 PPM 162011 15:54:21.2 +04:02:43 9.9 0.17 131 471325 15:54:01.4 +03:53:45 12.6 131 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 37.6 km
RECON observability=0.2 and success probability=0.6%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Oroville | 04:02:01 | -5.5 | CT | Down | 17.7 | 104.9 | Really Low | 03:58:34 - 04:05:28 | 7816 |
| Tonasket | 04:02:01 | -5.7 | CT | Down | 17.8 | 104.8 | Really Low | 03:58:34 - 04:05:28 | 7792 |
| Okanogan | 04:02:01 | -5.8 | CT | Down | 17.8 | 104.6 | Really Low | 03:58:34 - 04:05:28 | 7757 |
| Brewster | 04:02:02 | -5.8 | CT | Down | 17.7 | 104.3 | Really Low | 03:58:35 - 04:05:29 | 7728 |
| Manson/Chelan | 04:02:03 | -5.8 | CT | Down | 17.5 | 104.0 | Really Low | 03:58:36 - 04:05:30 | 7704 |
| Entiat | 04:02:03 | -5.8 | CT | Down | 17.5 | 103.9 | Really Low | 03:58:36 - 04:05:30 | 7681 |
| Wenatchee | 04:02:03 | -5.9 | CT | Down | 17.5 | 103.7 | Really Low | 03:58:36 - 04:05:30 | 7655 |
| Ellensburg | 04:02:03 | -6.1 | CT | Down | 17.5 | 103.4 | Really Low | 03:58:36 - 04:05:30 | 7611 |
| Yakima | 04:02:05 | -6.3 | CT | Down | 17.6 | 103.3 | Really Low | 03:58:38 - 04:05:32 | 7569 |
| Toppenish/White Swan | 04:02:05 | -6.5 | CT | Down | 17.7 | 103.3 | Really Low | 03:58:38 - 04:05:32 | 7548 |
| Pasco | 04:02:04 | -7.3 | CT | Down | 18.6 | 104.3 | Really Low | 03:58:37 - 04:05:31 | 7546 |
| PNWRO | 04:02:04 | -7.6 | CT | Down | 18.8 | 104.4 | Really Low | 03:58:37 - 04:05:31 | 7522 |
| George/Umatilla | 04:02:04 | -7.4 | CT | Down | 18.6 | 104.0 | Really Low | 03:58:37 - 04:05:31 | 7510 |
| Goldendale | 04:02:05 | -6.6 | CT | Down | 17.6 | 102.8 | Really Low | 03:58:38 - 04:05:32 | 7488 |
| The Dalles | 04:02:06 | -6.5 | CT | Down | 17.4 | 102.5 | Really Low | 03:58:39 - 04:05:33 | 7462 |
| Maupin | 04:02:06 | -6.8 | CT | Down | 17.5 | 102.5 | Really Low | 03:58:39 - 04:05:33 | 7420 |
| Madras/Culver | 04:02:07 | -7.1 | CT | Down | 17.6 | 102.3 | Really Low | 03:58:40 - 04:05:34 | 7363 |
| Redmond | 04:02:07 | -7.2 | CT | Down | 17.7 | 102.1 | Really Low | 03:58:40 - 04:05:34 | 7325 |
| Sisters | 04:02:08 | -7.0 | CT | Down | 17.4 | 101.8 | Really Low | 03:58:41 - 04:05:35 | 7325 |
| Bend | 04:02:07 | -7.3 | CT | Down | 17.6 | 101.9 | Really Low | 03:58:40 - 04:05:34 | 7302 |
| Oregon Observatory | 04:02:08 | -7.3 | CT | Down | 17.6 | 101.8 | Really Low | 03:58:41 - 04:05:35 | 7283 |
| La Pine/Gilchrist | 04:02:08 | -7.4 | CT | Down | 17.6 | 101.7 | Really Low | 03:58:41 - 04:05:35 | 7261 |
| North Lake | 04:02:08 | -8.0 | CT | Down | 18.1 | 102.0 | Really Low | 03:58:41 - 04:05:35 | 7220 |
| Paisley | 04:02:08 | -8.5 | CT | Down | 18.5 | 102.1 | Really Low | 03:58:41 - 04:05:35 | 7164 |
| Chiloquin | 04:02:09 | -7.8 | CT | Down | 17.5 | 101.1 | Really Low | 03:58:42 - 04:05:36 | 7141 |
| Lakeview | 04:02:09 | -8.9 | CT | Down | 18.7 | 102.0 | Really Low | 03:58:42 - 04:05:36 | 7113 |
| Klamath Falls | 04:02:10 | -8.0 | CT | Down | 17.7 | 101.0 | Really Low | 03:58:43 - 04:05:37 | 7106 |
| Niwot | 04:01:51 | -18.9 | Dark | Down | 30.2 | 112.7 | Up | 03:58:24 - 04:05:18 | 7087 |
| Tulelake | 04:02:09 | -8.4 | CT | Down | 17.9 | 101.2 | Really Low | 03:58:42 - 04:05:36 | 7080 |
| Cedarville | 04:02:09 | -9.4 | CT | Down | 19.0 | 102.0 | Really Low | 03:58:42 - 04:05:36 | 7045 |
| Fall River/Burney | 04:02:11 | -8.9 | CT | Down | 18.2 | 100.9 | Really Low | 03:58:44 - 04:05:38 | 6984 |
| Susanville | 04:02:10 | -9.7 | CT | Down | 18.8 | 101.2 | Really Low | 03:58:43 - 04:05:37 | 6923 |
| Gimple | 04:02:11 | -9.8 | CT | Down | 18.7 | 101.0 | Really Low | 03:58:44 - 04:05:38 | 6892 |
| Greenville | 04:02:11 | -9.7 | CT | Down | 18.7 | 100.9 | Really Low | 03:58:44 - 04:05:38 | 6891 |
| Quincy | 04:02:11 | -9.8 | CT | Down | 18.7 | 100.9 | Really Low | 03:58:44 - 04:05:38 | 6870 |
| Portola | 04:02:11 | -10.2 | CT | Down | 19.1 | 101.2 | Really Low | 03:58:44 - 04:05:38 | 6860 |
| Reno | 04:02:09 | -10.8 | CT | Down | 19.6 | 101.5 | Really Low | 03:58:42 - 04:05:36 | 6837 |
| Carson City | 04:02:10 | -11.0 | CT | Down | 19.7 | 101.4 | Really Low | 03:58:43 - 04:05:37 | 6799 |
| Yerington | 04:02:10 | -11.5 | CT | Down | 20.3 | 101.8 | Low | 03:58:43 - 04:05:37 | 6784 |
| Gardnerville | 04:02:11 | -11.1 | CT | Down | 19.8 | 101.4 | Really Low | 03:58:44 - 04:05:38 | 6773 |
| Hawthorne | 04:02:09 | -12.1 | AT | Down | 20.8 | 102.0 | Low | 03:58:42 - 04:05:36 | 6739 |
| Tonopah | 04:02:08 | -13.3 | AT | Down | 21.9 | 102.8 | Low | 03:58:41 - 04:05:35 | 6703 |
| Lee Vining | 04:02:11 | -12.1 | AT | Down | 20.5 | 101.4 | Low | 03:58:44 - 04:05:38 | 6674 |
| Bishop | 04:02:09 | -12.9 | AT | Down | 21.2 | 101.7 | Low | 03:58:42 - 04:05:36 | 6617 |
| Beatty | 04:02:08 | -14.2 | AT | Down | 22.5 | 102.6 | Low | 03:58:41 - 04:05:35 | 6584 |
| Indian Springs | 04:02:07 | -15.1 | AT | Down | 23.5 | 103.2 | Low | 03:58:40 - 04:05:34 | 6561 |
| Lone Pine | 04:02:10 | -13.6 | AT | Down | 21.6 | 101.6 | Low | 03:58:43 - 04:05:37 | 6538 |
| Henderson | 04:02:06 | -15.9 | AT | Down | 24.1 | 103.4 | Low | 03:58:39 - 04:05:33 | 6512 |
| Patrick | 04:02:05 | -17.0 | AT | Down | 25.1 | 103.9 | Low | 03:58:38 - 04:05:32 | 6459 |
| Searchlight/Boulder City | 04:02:07 | -16.3 | AT | Down | 24.3 | 103.2 | Low | 03:58:40 - 04:05:34 | 6451 |
| DCO | 04:02:04 | -17.6 | AT | Down | 25.8 | 104.2 | Low | 03:58:37 - 04:05:31 | 6435 |
| Kingman/Dolan Springs | 04:02:05 | -17.0 | AT | Down | 25.1 | 103.7 | Low | 03:58:38 - 04:05:32 | 6432 |
| Laughlin/Bullhead City | 04:02:06 | -16.7 | AT | Down | 24.6 | 103.3 | Low | 03:58:39 - 04:05:33 | 6423 |
| Mohave Valley | 04:02:06 | -16.9 | AT | Down | 24.7 | 103.2 | Low | 03:58:39 - 04:05:33 | 6394 |
| CPSLO | 04:02:13 | -12.6 | AT | Down | 19.8 | 99.5 | Really Low | 03:58:46 - 04:05:40 | 6373 |
| Lake Havasu City | 04:02:06 | -17.3 | AT | Down | 25.0 | 103.2 | Low | 03:58:39 - 04:05:33 | 6354 |
| Parker | 04:02:06 | -17.5 | AT | Down | 25.1 | 103.1 | Low | 03:58:39 - 04:05:33 | 6316 |
| Wildwood | 04:02:12 | -14.7 | AT | Down | 21.6 | 100.3 | Low | 03:58:45 - 04:05:39 | 6261 |
| Blythe | 04:02:07 | -17.6 | AT | Down | 25.0 | 102.6 | Low | 03:58:40 - 04:05:34 | 6256 |
| Idyllwild | 04:02:09 | -16.1 | AT | Down | 23.2 | 101.3 | Low | 03:58:42 - 04:05:36 | 6242 |
| Calipatria | 04:02:08 | -17.3 | AT | Down | 24.3 | 101.8 | Low | 03:58:41 - 04:05:35 | 6190 |
| Yuma | 04:02:07 | -18.2 | Dark | Down | 25.2 | 102.2 | Low | 03:58:40 - 04:05:34 | 6155 |
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 471325, (2018/05/12 03:59UT) Object RA Dec mag sep mel Arcturus 14:15:38.3 +19:10:21 0.0 28.24 150 Unukalhai 15:44:16.3 +06:25:33 2.6 3.31 133 37Eps Ser 15:50:49.1 +04:28:41 3.7 0.78 132 PPM 162038 15:54:41.8 +05:12:35 8.4 1.32 131 PPM 162011 15:53:26.2 +04:05:56 9.9 0.17 131 471325 15:53:06.4 +03:56:58 12.6 131 Positions are for J2000
Event circumstances last updated at 2017/12/02 17:31:44 UT
Marc W. Buie, Southwest Research Institute