Event between (385266) 01QB298 and star UC4-438-124176 with event index number of 155769
Geocentric closest approach at 2018/09/21 06:45:20 UTC
J2000 position of star is 23:20:54.0 -02:29:51
Equinox of date position of star is 23:21:47.4 -02:24:08
Stellar brightness R=16.2,
use SENSEUP=128
Star is 35 degrees from the moon.
Moon is 87% illuminated.
TNO apparent brightness V=22.8
[RECON map]
TNO is 40.1 AU from the Sun
and 39.1 AU from the Earth.
The TNO is moving 24.5
km/sec on the sky relative to the star, or,
3.1 arcsec/hr.
The 1-sigma error in the time of the event is 272 seconds.
The 1-sigma cross-track error in the shadow position is
5112 km.
The sky-plane scale is
28368.1 km/arcsec.
The TNO has an absolute magnitude Hv=6.8
Diameter=263.0 km assuming a 5% albedo -- 10.8 sec chord
Diameter=107.4 km assuming a 30% albedo -- 4.4 sec chord
Dynamical classification is CLASSICAL
Star training set for 385266, (2018/09/21 06:45UT) Object RA Dec mag sep mel Fomalhaut 22:58:40.8 -29:31:21 1.2 27.68 27 Markab 23:05:41.7 +15:18:23 2.5 18.15 43 96 Aqr 23:20:22.2 -05:01:18 5.4 2.65 33 PPM 181626 23:25:36.8 -01:38:18 8.0 1.20 36 PPM 207454 23:21:57.7 -02:22:36 9.6 0.03 35 385266 23:21:51.7 -02:23:41 16.2 35 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
3.3 sigma about the mid-time.
The median site spacing is 15.8 km
RECON observability=1.0 and success probability=2.7%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Oroville | 06:44:26 | -38.3 | Dark | Up | 38.0 | 169.2 | Up | 06:29:26 - 06:59:26 | 12335 |
| Tonasket | 06:44:25 | -38.6 | Dark | Up | 38.3 | 169.2 | Up | 06:29:25 - 06:59:25 | 12321 |
| Okanogan | 06:44:27 | -38.8 | Dark | Up | 38.6 | 169.0 | Up | 06:29:27 - 06:59:27 | 12305 |
| Brewster | 06:44:27 | -39.0 | Dark | Up | 38.8 | 168.7 | Up | 06:29:27 - 06:59:27 | 12295 |
| Manson/Chelan | 06:44:29 | -39.1 | Dark | Up | 39.0 | 168.2 | Up | 06:29:29 - 06:59:29 | 12293 |
| Entiat | 06:44:29 | -39.3 | Dark | Up | 39.2 | 168.1 | Up | 06:29:29 - 06:59:29 | 12281 |
| Wenatchee | 06:44:28 | -39.5 | Dark | Up | 39.4 | 167.9 | Up | 06:29:28 - 06:59:28 | 12269 |
| Ellensburg | 06:44:30 | -39.8 | Dark | Up | 39.8 | 167.5 | Up | 06:29:30 - 06:59:30 | 12250 |
| Yakima | 06:44:31 | -40.2 | Dark | Up | 40.2 | 167.5 | Up | 06:29:31 - 06:59:31 | 12225 |
| Toppenish/White Swan | 06:44:32 | -40.5 | Dark | Up | 40.4 | 167.6 | Up | 06:29:32 - 06:59:32 | 12207 |
| Goldendale | 06:44:34 | -40.9 | Dark | Up | 40.9 | 167.0 | Up | 06:29:34 - 06:59:34 | 12185 |
| The Dalles | 06:44:33 | -41.0 | Dark | Up | 41.1 | 166.5 | Up | 06:29:33 - 06:59:33 | 12181 |
| Pasco | 06:44:29 | -40.9 | Dark | Up | 40.7 | 169.3 | Up | 06:29:29 - 06:59:29 | 12162 |
| Maupin | 06:44:36 | -41.4 | Dark | Up | 41.5 | 166.5 | Up | 06:29:36 - 06:59:36 | 12151 |
| George/Umatilla | 06:44:28 | -41.2 | Dark | Up | 41.0 | 168.9 | Up | 06:29:28 - 06:59:28 | 12147 |
| PNWRO | 06:44:29 | -41.2 | Dark | Up | 41.0 | 169.5 | Up | 06:29:29 - 06:59:29 | 12139 |
| Madras/Culver | 06:44:38 | -41.9 | Dark | Up | 42.0 | 166.4 | Up | 06:29:38 - 06:59:38 | 12118 |
| Sisters | 06:44:37 | -42.0 | Dark | Up | 42.3 | 165.7 | Up | 06:29:37 - 06:59:37 | 12110 |
| Redmond | 06:44:37 | -42.2 | Dark | Up | 42.4 | 166.2 | Up | 06:29:37 - 06:59:37 | 12096 |
| Bend | 06:44:37 | -42.3 | Dark | Up | 42.5 | 166.0 | Up | 06:29:37 - 06:59:37 | 12087 |
| Oregon Observatory | 06:44:40 | -42.4 | Dark | Up | 42.7 | 165.8 | Up | 06:29:40 - 06:59:40 | 12079 |
| La Pine/Gilchrist | 06:44:40 | -42.6 | Dark | Up | 42.9 | 165.7 | Up | 06:29:40 - 06:59:40 | 12068 |
| North Lake | 06:44:39 | -43.2 | Dark | Up | 43.4 | 166.4 | Up | 06:29:39 - 06:59:39 | 12021 |
| Chiloquin | 06:44:43 | -43.5 | Dark | Up | 43.9 | 164.9 | Up | 06:29:43 - 06:59:43 | 12005 |
| Klamath Falls | 06:44:43 | -43.8 | Dark | Up | 44.2 | 165.0 | Up | 06:29:43 - 06:59:43 | 11979 |
| Paisley | 06:44:37 | -43.8 | Dark | Up | 44.0 | 166.7 | Up | 06:29:37 - 06:59:37 | 11973 |
| Tulelake | 06:44:43 | -44.2 | Dark | Up | 44.6 | 165.3 | Up | 06:29:43 - 06:59:43 | 11952 |
| Lakeview | 06:44:40 | -44.3 | Dark | Up | 44.5 | 166.9 | Up | 06:29:40 - 06:59:40 | 11932 |
| Fall River/Burney | 06:44:45 | -45.0 | Dark | Up | 45.4 | 165.2 | Up | 06:29:45 - 06:59:45 | 11887 |
| Cedarville | 06:44:39 | -45.0 | Dark | Up | 45.2 | 167.0 | Up | 06:29:39 - 06:59:39 | 11882 |
| Susanville | 06:44:43 | -45.8 | Dark | Up | 46.2 | 166.1 | Up | 06:29:43 - 06:59:43 | 11819 |
| Greenville | 06:44:45 | -46.0 | Dark | Up | 46.4 | 165.6 | Up | 06:29:45 - 06:59:45 | 11809 |
| Gimple | 06:44:44 | -46.0 | Dark | Up | 46.4 | 165.7 | Up | 06:29:44 - 06:59:44 | 11806 |
| Quincy | 06:44:44 | -46.1 | Dark | Up | 46.6 | 165.5 | Up | 06:29:44 - 06:59:44 | 11794 |
| Portola | 06:44:42 | -46.4 | Dark | Up | 46.8 | 166.2 | Up | 06:29:42 - 06:59:42 | 11770 |
| Reno | 06:44:42 | -46.9 | Dark | Up | 47.2 | 167.0 | Up | 06:29:42 - 06:59:42 | 11730 |
| Carson City | 06:44:43 | -47.2 | Dark | Up | 47.5 | 167.0 | Up | 06:29:43 - 06:59:43 | 11704 |
| Gardnerville | 06:44:42 | -47.4 | Dark | Up | 47.8 | 167.0 | Up | 06:29:42 - 06:59:42 | 11684 |
| Yerington | 06:44:40 | -47.6 | Dark | Up | 47.8 | 167.9 | Up | 06:29:40 - 06:59:40 | 11668 |
| Hawthorne | 06:44:38 | -48.2 | Dark | Up | 48.4 | 168.5 | Up | 06:29:38 - 06:59:38 | 11617 |
| Lee Vining | 06:44:42 | -48.5 | Dark | Up | 48.9 | 167.7 | Up | 06:29:42 - 06:59:42 | 11592 |
| Tonopah | 06:44:36 | -49.0 | Dark | Up | 49.0 | 170.5 | Up | 06:29:36 - 06:59:36 | 11535 |
| Bishop | 06:44:41 | -49.3 | Dark | Up | 49.6 | 168.6 | Up | 06:29:41 - 06:59:41 | 11522 |
| Lone Pine | 06:44:42 | -50.1 | Dark | Up | 50.4 | 169.0 | Up | 06:29:42 - 06:59:42 | 11453 |
| CPSLO | 06:44:52 | -50.4 | Dark | Up | 51.1 | 164.6 | Up | 06:29:52 - 06:59:52 | 11442 |
| Beatty | 06:44:36 | -50.3 | Dark | Up | 50.2 | 171.0 | Up | 06:29:36 - 06:59:36 | 11431 |
| Indian Springs | 06:44:33 | -50.9 | Dark | Up | 50.7 | 172.6 | Up | 06:29:33 - 06:59:33 | 11369 |
| Henderson | 06:44:30 | -51.6 | Dark | Up | 51.3 | 173.6 | Up | 06:29:30 - 06:59:30 | 11303 |
| Niwot | 06:43:55 | -49.1 | Dark | Up | 47.1 | 188.4 | Up | 06:28:55 - 06:58:55 | 11288 |
| Wildwood | 06:44:47 | -52.2 | Dark | Up | 52.7 | 167.5 | Up | 06:29:47 - 06:59:47 | 11276 |
| Searchlight/Boulder City | 06:44:31 | -52.1 | Dark | Up | 51.9 | 173.7 | Up | 06:29:31 - 06:59:31 | 11256 |
| Laughlin/Bullhead City | 06:44:30 | -52.5 | Dark | Up | 52.2 | 174.2 | Up | 06:29:30 - 06:59:30 | 11220 |
| Patrick | 06:44:29 | -52.5 | Dark | Up | 52.0 | 175.3 | Up | 06:29:29 - 06:59:29 | 11215 |
| Kingman/Dolan Springs | 06:44:30 | -52.6 | Dark | Up | 52.2 | 175.0 | Up | 06:29:30 - 06:59:30 | 11204 |
| Mohave Valley | 06:44:31 | -52.8 | Dark | Up | 52.5 | 174.2 | Up | 06:29:31 - 06:59:31 | 11198 |
| Idyllwild | 06:44:42 | -53.2 | Dark | Up | 53.4 | 170.5 | Up | 06:29:42 - 06:59:42 | 11182 |
| DCO | 06:44:27 | -52.9 | Dark | Up | 52.3 | 176.5 | Up | 06:29:27 - 06:59:27 | 11165 |
| Lake Havasu City | 06:44:32 | -53.2 | Dark | Up | 52.9 | 174.5 | Up | 06:29:32 - 06:59:32 | 11157 |
| Parker | 06:44:33 | -53.5 | Dark | Up | 53.2 | 174.5 | Up | 06:29:33 - 06:59:33 | 11128 |
| Blythe | 06:44:35 | -54.0 | Dark | Up | 53.7 | 174.0 | Up | 06:29:35 - 06:59:35 | 11096 |
| Calipatria | 06:44:39 | -54.1 | Dark | Up | 54.1 | 172.3 | Up | 06:29:39 - 06:59:39 | 11089 |
| Yuma | 06:44:35 | -54.8 | Dark | Up | 54.6 | 173.8 | Up | 06:29:35 - 06:59:35 | 11021 |
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 385266, (2018/09/21 06:45UT) Object RA Dec mag sep mel Fomalhaut 22:57:39.5 -29:37:23 1.2 27.68 27 Markab 23:04:45.7 +15:12:18 2.5 18.15 43 96 Aqr 23:19:24.2 -05:07:28 5.4 2.65 33 PPM 181626 23:24:39.1 -01:44:29 8.0 1.20 36 PPM 207454 23:21:00.0 -02:28:46 9.6 0.03 35 385266 23:20:54.0 -02:29:51 16.2 35 Positions are for J2000
Event circumstances last updated at 2017/04/24 16:32:43 UT
Marc W. Buie, Southwest Research Institute