Event between (538691) 16FW59 and star GA0800:04225204 with event index number of 1624426
Geocentric closest approach at 2020/03/25 07:05:58 UTC
J2000 position of star is 12:24:20.9 -09:31:13
Equinox of date position of star is 12:25:21.3 -09:37:41
Stellar brightness G=17.0,
use SENSEUP=128
Star is 168 degrees from the moon.
Moon is 1% illuminated.
TNO apparent brightness V=22.6
[RECON map]
TNO is 45.3 AU from the Sun
and 44.3 AU from the Earth.
The TNO is moving 25.4
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 218 seconds.
The 1-sigma cross-track error in the shadow position is
3322 km.
The sky-plane scale is
32130.5 km/arcsec.
The TNO has an absolute magnitude Hv=6.1
Diameter=363.1 km assuming a 5% albedo -- 14.3 sec chord
Diameter=148.2 km assuming a 30% albedo -- 5.8 sec chord
Dynamical classification is CLASSICAL
Star training set for 538691, (2020/03/25 07:06UT) Object RA Dec mag sep mel Spica 13:26:15.7 -11:15:59 1.0 15.05 169 4Gam Crv 12:16:51.0 -17:39:15 2.6 8.29 160 PPM 225805 12:26:14.5 -11:43:22 6.3 2.10 166 PPM 195434 12:24:19.0 -09:53:02 7.8 0.37 167 PPM 195442 12:24:49.5 -09:46:40 9.6 0.20 167 538691 12:25:23.6 -09:37:56 17.0 168 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
4.1 sigma about the mid-time.
The median site spacing is 12.4 km
RECON observability=1.0 and success probability=1.9%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Kelowna | 07:07:58 | -36.7 | Dark | Down | 29.1 | 162.7 | Low | 06:52:58 - 07:22:58 | 8966 |
| Summerland | 07:07:59 | -37.0 | Dark | Down | 29.3 | 162.3 | Low | 06:52:59 - 07:22:59 | 8940 |
| Penticton | 07:07:59 | -37.0 | Dark | Down | 29.4 | 162.5 | Low | 06:52:59 - 07:22:59 | 8939 |
| Okanagan Falls | 07:07:59 | -37.2 | Dark | Down | 29.6 | 162.4 | Low | 06:52:59 - 07:22:59 | 8927 |
| Oliver | 07:07:59 | -37.4 | Dark | Down | 29.8 | 162.4 | Low | 06:52:59 - 07:22:59 | 8917 |
| Anarchist Mountain Observatory | 07:07:58 | -37.6 | Dark | Down | 30.0 | 162.6 | Low | 06:52:58 - 07:22:58 | 8912 |
| Oroville | 07:07:58 | -37.6 | Dark | Down | 30.0 | 162.5 | Up | 06:52:58 - 07:22:58 | 8905 |
| Tonasket | 07:07:58 | -37.9 | Dark | Down | 30.2 | 162.4 | Up | 06:52:58 - 07:22:58 | 8891 |
| Okanogan | 07:07:59 | -38.1 | Dark | Down | 30.5 | 162.2 | Up | 06:52:59 - 07:22:59 | 8865 |
| Brewster | 07:07:59 | -38.4 | Dark | Down | 30.7 | 161.9 | Up | 06:52:59 - 07:22:59 | 8841 |
| Manson/Chelan | 07:08:00 | -38.5 | Dark | Down | 30.9 | 161.5 | Up | 06:53:00 - 07:23:00 | 8817 |
| Wenatchee | 07:08:00 | -38.9 | Dark | Down | 31.3 | 161.2 | Up | 06:53:00 - 07:23:00 | 8781 |
| SwRI | 07:07:14 | -48.0 | Dark | Down | 40.5 | 178.3 | Up | 06:52:14 - 07:22:14 | 8771 |
| Ellensburg | 07:08:01 | -39.2 | Dark | Down | 31.6 | 160.9 | Up | 06:53:01 - 07:23:01 | 8747 |
| Pasco | 07:07:57 | -40.3 | Dark | Down | 32.6 | 162.3 | Up | 06:52:57 - 07:22:57 | 8742 |
| PNWRO | 07:07:57 | -40.5 | Dark | Down | 32.9 | 162.6 | Up | 06:52:57 - 07:22:57 | 8733 |
| Yakima | 07:08:01 | -39.6 | Dark | Down | 32.0 | 160.8 | Up | 06:53:01 - 07:23:01 | 8719 |
| George/Umatilla | 07:07:58 | -40.5 | Dark | Down | 32.9 | 162.0 | Up | 06:52:58 - 07:22:58 | 8713 |
| Toppenish/White Swan | 07:08:01 | -39.9 | Dark | Down | 32.2 | 160.9 | Up | 06:53:01 - 07:23:01 | 8710 |
| Goldendale | 07:08:03 | -40.3 | Dark | Down | 32.7 | 160.3 | Up | 06:53:03 - 07:23:03 | 8660 |
| The Dalles | 07:08:03 | -40.4 | Dark | Down | 32.8 | 159.9 | Up | 06:53:03 - 07:23:03 | 8633 |
| Maupin | 07:08:02 | -40.8 | Dark | Down | 33.2 | 159.9 | Up | 06:53:02 - 07:23:02 | 8607 |
| Madras/Culver | 07:08:02 | -41.3 | Dark | Down | 33.7 | 159.7 | Up | 06:53:02 - 07:23:02 | 8568 |
| Redmond | 07:08:02 | -41.6 | Dark | Down | 34.0 | 159.6 | Up | 06:53:02 - 07:23:02 | 8542 |
| Sisters | 07:08:04 | -41.5 | Dark | Down | 33.9 | 159.1 | Up | 06:53:04 - 07:23:04 | 8531 |
| Bend | 07:08:03 | -41.8 | Dark | Down | 34.2 | 159.4 | Up | 06:53:03 - 07:23:03 | 8522 |
| Oregon Observatory | 07:08:03 | -41.9 | Dark | Down | 34.3 | 159.2 | Up | 06:53:03 - 07:23:03 | 8506 |
| La Pine/Gilchrist | 07:08:03 | -42.1 | Dark | Down | 34.5 | 159.1 | Up | 06:53:03 - 07:23:03 | 8489 |
| North Lake | 07:08:02 | -42.7 | Dark | Down | 35.1 | 159.7 | Up | 06:53:02 - 07:23:02 | 8478 |
| Paisley | 07:08:00 | -43.3 | Dark | Down | 35.7 | 159.9 | Up | 06:53:00 - 07:23:00 | 8451 |
| Lakeview | 07:08:00 | -43.8 | Dark | Down | 36.2 | 160.0 | Up | 06:53:00 - 07:23:00 | 8421 |
| Chiloquin | 07:08:04 | -43.0 | Dark | Down | 35.4 | 158.4 | Up | 06:53:04 - 07:23:04 | 8398 |
| Cedarville | 07:07:59 | -44.5 | Dark | Down | 36.9 | 160.1 | Up | 06:52:59 - 07:22:59 | 8379 |
| Klamath Falls | 07:08:03 | -43.4 | Dark | Down | 35.8 | 158.4 | Up | 06:53:03 - 07:23:03 | 8376 |
| Tulelake | 07:08:02 | -43.7 | Dark | Down | 36.1 | 158.7 | Up | 06:53:02 - 07:23:02 | 8366 |
| Fall River/Burney | 07:08:02 | -44.6 | Dark | Down | 37.0 | 158.5 | Up | 06:53:02 - 07:23:02 | 8302 |
| Susanville | 07:08:00 | -45.4 | Dark | Down | 37.8 | 159.2 | Up | 06:53:00 - 07:23:00 | 8281 |
| Gimple | 07:08:00 | -45.6 | Dark | Down | 38.0 | 158.9 | Up | 06:53:00 - 07:23:00 | 8253 |
| Greenville | 07:08:01 | -45.5 | Dark | Down | 38.0 | 158.8 | Up | 06:53:01 - 07:23:01 | 8250 |
| Reno | 07:07:57 | -46.4 | Dark | Down | 38.8 | 160.0 | Up | 06:52:57 - 07:22:57 | 8245 |
| Portola | 07:07:59 | -46.0 | Dark | Down | 38.4 | 159.3 | Up | 06:52:59 - 07:22:59 | 8242 |
| Quincy | 07:08:01 | -45.7 | Dark | Down | 38.1 | 158.7 | Up | 06:53:01 - 07:23:01 | 8235 |
| Yerington | 07:07:55 | -47.1 | Dark | Down | 39.5 | 160.6 | Up | 06:52:55 - 07:22:55 | 8226 |
| Tonopah | 07:07:49 | -48.5 | Dark | Down | 40.9 | 162.8 | Up | 06:52:49 - 07:22:49 | 8225 |
| Carson City | 07:07:57 | -46.7 | Dark | Down | 39.2 | 159.9 | Up | 06:52:57 - 07:22:57 | 8219 |
| Hawthorne | 07:07:53 | -47.7 | Dark | Down | 40.1 | 161.1 | Up | 06:52:53 - 07:22:53 | 8210 |
| Gardnerville | 07:07:57 | -47.0 | Dark | Down | 39.4 | 159.9 | Up | 06:52:57 - 07:22:57 | 8202 |
| Indian Springs | 07:07:44 | -50.2 | Dark | Down | 42.6 | 164.3 | Up | 06:52:44 - 07:22:44 | 8167 |
| Beatty | 07:07:47 | -49.7 | Dark | Down | 42.1 | 163.0 | Up | 06:52:47 - 07:22:47 | 8153 |
| Henderson | 07:07:41 | -50.9 | Dark | Down | 43.3 | 165.1 | Up | 06:52:41 - 07:22:41 | 8151 |
| Lee Vining | 07:07:55 | -48.1 | Dark | Down | 40.5 | 160.4 | Up | 06:52:55 - 07:22:55 | 8150 |
| Patrick | 07:07:35 | -51.7 | Dark | Down | 44.1 | 166.4 | Up | 06:52:35 - 07:22:35 | 8143 |
| Bishop | 07:07:52 | -48.8 | Dark | Down | 41.2 | 161.1 | Up | 06:52:52 - 07:22:52 | 8130 |
| Kingman/Dolan Springs | 07:07:37 | -51.9 | Dark | Down | 44.3 | 166.1 | Up | 06:52:37 - 07:22:37 | 8119 |
| Searchlight/Boulder City | 07:07:39 | -51.5 | Dark | Down | 43.9 | 165.0 | Up | 06:52:39 - 07:22:39 | 8109 |
| Laughlin/Bullhead City | 07:07:39 | -51.8 | Dark | Down | 44.2 | 165.4 | Up | 06:52:39 - 07:22:39 | 8098 |
| Lone Pine | 07:07:51 | -49.6 | Dark | Down | 42.0 | 161.3 | Up | 06:52:51 - 07:22:51 | 8083 |
| Mohave Valley | 07:07:38 | -52.1 | Dark | Down | 44.5 | 165.4 | Up | 06:52:38 - 07:22:38 | 8078 |
| Lake Havasu City | 07:07:37 | -52.5 | Dark | Down | 44.9 | 165.6 | Up | 06:52:37 - 07:22:37 | 8055 |
| Parker | 07:07:37 | -52.9 | Dark | Down | 45.3 | 165.5 | Up | 06:52:37 - 07:22:37 | 8029 |
| Blythe | 07:07:37 | -53.3 | Dark | Down | 45.7 | 165.0 | Up | 06:52:37 - 07:22:37 | 7976 |
| Idyllwild | 07:07:45 | -52.7 | Dark | Down | 45.1 | 162.2 | Up | 06:52:45 - 07:22:45 | 7907 |
| Calipatria | 07:07:40 | -53.6 | Dark | Down | 46.0 | 163.6 | Up | 06:52:40 - 07:22:40 | 7902 |
| Yuma | 07:07:37 | -54.2 | Dark | Down | 46.6 | 164.7 | Up | 06:52:37 - 07:22:37 | 7901 |
| CPSLO | 07:07:58 | -50.1 | Dark | Down | 42.5 | 157.6 | Up | 06:52:58 - 07:22:58 | 7886 |
| Wildwood | 07:07:51 | -51.8 | Dark | Down | 44.3 | 159.8 | Up | 06:52:51 - 07:22:51 | 7865 |
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 538691, (2020/03/25 07:06UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 15.05 169 4Gam Crv 12:15:48.2 -17:32:31 2.6 8.29 160 PPM 225805 12:25:11.7 -11:36:39 6.3 2.10 166 PPM 195434 12:23:16.3 -09:46:18 7.8 0.37 167 PPM 195442 12:23:46.7 -09:39:57 9.6 0.20 167 538691 12:24:20.9 -09:31:13 17.0 168 Positions are for J2000
Event circumstances last updated at 2019/07/02 02:34:11 UT
Marc W. Buie, Southwest Research Institute