Event between 98UR43 and star UC4-585-014920 with event index number of 101969
Geocentric closest approach at 2018/01/12 04:55:49 UTC
J2000 position of star is 05:09:46.5 +26:54:47
Equinox of date position of star is 05:10:53.5 +26:56:04
Stellar brightness R=15.9,
use SENSEUP=128
Star is 158 degrees from the moon.
Moon is 20% illuminated.
TNO apparent brightness V=23.2
[RECON map]
TNO is 30.8 AU from the Sun
and 30.0 AU from the Earth.
The TNO is moving 19.6
km/sec on the sky relative to the star, or,
3.2 arcsec/hr.
The 1-sigma error in the time of the event is 697 seconds.
The 1-sigma cross-track error in the shadow position is
5077 km.
The sky-plane scale is
21746.6 km/arcsec.
The TNO has an absolute magnitude Hv=8.3
Diameter=129.4 km assuming a 5% albedo -- 6.6 sec chord
Diameter=52.8 km assuming a 30% albedo -- 2.7 sec chord
Dynamical classification is 3:2E
Star training set for 98UR43, (2018/01/12 04:56UT) Object RA Dec mag sep mel Aldebaran 04:36:57.4 +16:32:39 0.8 13.03 169 Alnath 05:27:26.0 +28:37:16 1.6 4.03 154 PPM 094057 05:07:00.5 +26:27:11 6.4 0.99 159 PPM 094074 05:08:12.5 +27:01:07 8.5 0.61 159 PPM 094111 05:10:26.6 +27:19:12 10.2 0.40 158 98UR43 05:10:53.9 +26:56:05 15.9 158 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
1.3 sigma about the mid-time.
The median site spacing is 24.4 km
RECON observability=1.0 and success probability=5.7%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Oroville | 04:56:20 | -43.7 | Dark | Down | 66.3 | 154.5 | Up | 04:41:20 - 05:11:20 | 8434 |
| Tonasket | 04:56:21 | -43.8 | Dark | Down | 66.6 | 154.3 | Up | 04:41:21 - 05:11:21 | 8411 |
| Okanogan | 04:56:22 | -43.8 | Dark | Down | 66.8 | 153.7 | Up | 04:41:22 - 05:11:22 | 8379 |
| Brewster | 04:56:23 | -43.8 | Dark | Down | 67.0 | 153.0 | Up | 04:41:23 - 05:11:23 | 8355 |
| Manson/Chelan | 04:56:24 | -43.6 | Dark | Down | 67.1 | 151.9 | Up | 04:41:24 - 05:11:24 | 8339 |
| Entiat | 04:56:25 | -43.6 | Dark | Down | 67.2 | 151.6 | Up | 04:41:25 - 05:11:25 | 8317 |
| Wenatchee | 04:56:26 | -43.7 | Dark | Down | 67.4 | 151.1 | Up | 04:41:26 - 05:11:26 | 8293 |
| Ellensburg | 04:56:27 | -43.6 | Dark | Down | 67.7 | 150.1 | Up | 04:41:27 - 05:11:27 | 8254 |
| Yakima | 04:56:27 | -43.7 | Dark | Down | 68.1 | 149.6 | Up | 04:41:27 - 05:11:27 | 8213 |
| Toppenish/White Swan | 04:56:27 | -43.9 | Dark | Down | 68.3 | 149.7 | Up | 04:41:27 - 05:11:27 | 8189 |
| Pasco | 04:56:22 | -44.8 | Dark | Down | 68.8 | 152.3 | Up | 04:41:22 - 05:11:22 | 8158 |
| Goldendale | 04:56:30 | -43.8 | Dark | Down | 68.6 | 148.0 | Up | 04:41:30 - 05:11:30 | 8139 |
| PNWRO | 04:56:23 | -45.0 | Dark | Down | 69.1 | 152.6 | Up | 04:41:23 - 05:11:23 | 8130 |
| George/Umatilla | 04:56:23 | -44.7 | Dark | Down | 69.1 | 151.4 | Up | 04:41:23 - 05:11:23 | 8127 |
| The Dalles | 04:56:31 | -43.6 | Dark | Down | 68.7 | 146.9 | Up | 04:41:31 - 05:11:31 | 8122 |
| Maupin | 04:56:31 | -43.8 | Dark | Down | 69.1 | 146.5 | Up | 04:41:31 - 05:11:31 | 8077 |
| Madras/Culver | 04:56:33 | -43.9 | Dark | Down | 69.5 | 145.7 | Up | 04:41:33 - 05:11:33 | 8022 |
| Sisters | 04:56:35 | -43.6 | Dark | Down | 69.6 | 144.1 | Up | 04:41:35 - 05:11:35 | 7995 |
| Redmond | 04:56:33 | -43.9 | Dark | Down | 69.8 | 145.0 | Up | 04:41:33 - 05:11:33 | 7986 |
| Bend | 04:56:34 | -43.9 | Dark | Down | 69.9 | 144.3 | Up | 04:41:34 - 05:11:34 | 7966 |
| Oregon Observatory | 04:56:35 | -43.8 | Dark | Down | 70.0 | 143.8 | Up | 04:41:35 - 05:11:35 | 7950 |
| La Pine/Gilchrist | 04:56:35 | -43.8 | Dark | Down | 70.1 | 143.3 | Up | 04:41:35 - 05:11:35 | 7930 |
| North Lake | 04:56:34 | -44.3 | Dark | Down | 70.8 | 144.0 | Up | 04:41:34 - 05:11:34 | 7875 |
| Chiloquin | 04:56:38 | -43.8 | Dark | Down | 70.9 | 140.6 | Up | 04:41:38 - 05:11:38 | 7821 |
| Paisley | 04:56:33 | -44.7 | Dark | Down | 71.4 | 143.9 | Up | 04:41:33 - 05:11:33 | 7812 |
| Klamath Falls | 04:56:38 | -43.9 | Dark | Down | 71.2 | 140.1 | Up | 04:41:38 - 05:11:38 | 7784 |
| Lakeview | 04:56:33 | -44.9 | Dark | Down | 71.8 | 143.4 | Up | 04:41:33 - 05:11:33 | 7756 |
| Tulelake | 04:56:38 | -44.2 | Dark | Down | 71.5 | 140.3 | Up | 04:41:38 - 05:11:38 | 7751 |
| Cedarville | 04:56:33 | -45.2 | Dark | Down | 72.4 | 142.7 | Up | 04:41:33 - 05:11:33 | 7685 |
| Fall River/Burney | 04:56:38 | -44.4 | Dark | Down | 72.2 | 138.7 | Up | 04:41:38 - 05:11:38 | 7654 |
| Susanville | 04:56:35 | -45.0 | Dark | Down | 73.1 | 139.2 | Up | 04:41:35 - 05:11:35 | 7576 |
| Greenville | 04:56:38 | -44.9 | Dark | Down | 73.2 | 137.9 | Up | 04:41:38 - 05:11:38 | 7552 |
| Gimple | 04:56:38 | -44.9 | Dark | Down | 73.2 | 138.1 | Up | 04:41:38 - 05:11:38 | 7550 |
| Quincy | 04:56:37 | -44.9 | Dark | Down | 73.3 | 137.4 | Up | 04:41:37 - 05:11:37 | 7530 |
| Portola | 04:56:36 | -45.3 | Dark | Down | 73.6 | 138.4 | Up | 04:41:36 - 05:11:36 | 7509 |
| Reno | 04:56:34 | -45.8 | Dark | Down | 74.2 | 139.4 | Up | 04:41:34 - 05:11:34 | 7470 |
| Carson City | 04:56:34 | -45.9 | Dark | Down | 74.4 | 138.7 | Up | 04:41:34 - 05:11:34 | 7432 |
| Gardnerville | 04:56:34 | -46.0 | Dark | Down | 74.7 | 138.2 | Up | 04:41:34 - 05:11:34 | 7405 |
| Yerington | 04:56:32 | -46.4 | Dark | Down | 74.9 | 139.9 | Up | 04:41:32 - 05:11:32 | 7401 |
| Niwot | 04:55:32 | -56.3 | Dark | Down | 76.6 | 191.3 | Up | 04:40:32 - 05:10:32 | 7363 |
| Hawthorne | 04:56:30 | -46.9 | Dark | Down | 75.5 | 140.3 | Up | 04:41:30 - 05:11:30 | 7344 |
| Lee Vining | 04:56:33 | -46.6 | Dark | Down | 75.7 | 137.5 | Up | 04:41:33 - 05:11:33 | 7291 |
| Tonopah | 04:56:24 | -48.0 | Dark | Down | 76.6 | 143.5 | Up | 04:41:24 - 05:11:24 | 7272 |
| Bishop | 04:56:31 | -47.2 | Dark | Down | 76.5 | 138.0 | Up | 04:41:31 - 05:11:31 | 7216 |
| Beatty | 04:56:24 | -48.6 | Dark | Down | 77.7 | 142.0 | Up | 04:41:24 - 05:11:24 | 7141 |
| Lone Pine | 04:56:30 | -47.6 | Dark | Down | 77.3 | 136.8 | Up | 04:41:30 - 05:11:30 | 7129 |
| Indian Springs | 04:56:20 | -49.5 | Dark | Down | 78.5 | 144.9 | Up | 04:41:20 - 05:11:20 | 7091 |
| CPSLO | 04:56:43 | -45.7 | Dark | Down | 76.6 | 125.3 | Up | 04:41:43 - 05:11:43 | 7033 |
| Henderson | 04:56:17 | -50.1 | Dark | Down | 79.2 | 146.1 | Up | 04:41:17 - 05:11:17 | 7023 |
| Searchlight/Boulder City | 04:56:17 | -50.2 | Dark | Down | 79.7 | 144.6 | Up | 04:41:17 - 05:11:17 | 6960 |
| Patrick | 04:56:12 | -51.1 | Dark | Down | 80.2 | 149.0 | Up | 04:41:12 - 05:11:12 | 6940 |
| Laughlin/Bullhead City | 04:56:16 | -50.6 | Dark | Down | 80.1 | 145.1 | Up | 04:41:16 - 05:11:16 | 6923 |
| Kingman/Dolan Springs | 04:56:13 | -51.0 | Dark | Down | 80.4 | 147.5 | Up | 04:41:13 - 05:11:13 | 6919 |
| DCO | 04:56:09 | -51.7 | Dark | Down | 80.8 | 151.5 | Up | 04:41:09 - 05:11:09 | 6898 |
| Mohave Valley | 04:56:16 | -50.6 | Dark | Down | 80.4 | 144.2 | Up | 04:41:16 - 05:11:16 | 6894 |
| Wildwood | 04:56:35 | -47.4 | Dark | Down | 78.6 | 126.4 | Up | 04:41:35 - 05:11:35 | 6868 |
| Lake Havasu City | 04:56:16 | -50.9 | Dark | Down | 80.8 | 143.9 | Up | 04:41:16 - 05:11:16 | 6847 |
| Parker | 04:56:16 | -50.9 | Dark | Down | 81.1 | 142.8 | Up | 04:41:16 - 05:11:16 | 6808 |
| Idyllwild | 04:56:27 | -49.0 | Dark | Down | 80.1 | 131.1 | Up | 04:41:27 - 05:11:27 | 6799 |
| Blythe | 04:56:17 | -50.7 | Dark | Down | 81.4 | 139.2 | Up | 04:41:17 - 05:11:17 | 6755 |
| Calipatria | 04:56:21 | -50.0 | Dark | Down | 81.2 | 132.9 | Up | 04:41:21 - 05:11:21 | 6715 |
| Yuma | 04:56:18 | -50.8 | Dark | Down | 82.0 | 134.7 | Up | 04:41:18 - 05:11:18 | 6655 |
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 98UR43, (2018/01/12 04:56UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:30 0.8 13.03 169 Alnath 05:26:17.5 +28:36:24 1.6 4.03 154 PPM 094057 05:05:53.4 +26:25:47 6.4 0.99 159 PPM 094074 05:07:05.1 +26:59:45 8.5 0.61 159 PPM 094111 05:09:19.0 +27:17:54 10.2 0.40 158 98UR43 05:09:46.5 +26:54:47 15.9 158 Positions are for J2000
Event circumstances last updated at 2017/12/02 17:10:46 UT
Marc W. Buie, Southwest Research Institute