Event between (438028) 04EH96 and star GA0740:05216442 with event index number of 257533
Geocentric closest approach at 2020/04/25 09:59:20 UTC
J2000 position of star is 14:33:43.0 -15:24:09
Equinox of date position of star is 14:34:49.8 -15:29:26
Stellar brightness G=15.7,
use SENSEUP=128
Star is 159 degrees from the moon.
Moon is 5% illuminated.
TNO apparent brightness V=24.9
[RECON map]
TNO is 31.2 AU from the Sun
and 30.2 AU from the Earth.
The TNO is moving 23.7
km/sec on the sky relative to the star, or,
3.9 arcsec/hr.
The 1-sigma error in the time of the event is 291 seconds.
The 1-sigma cross-track error in the shadow position is
2961 km.
The sky-plane scale is
21881.8 km/arcsec.
The TNO has an absolute magnitude Hv=10.0
Diameter=158.5 km assuming a 5% albedo -- 2.5 sec chord
Diameter=64.7 km assuming a 30% albedo -- 1.0 sec chord
Dynamical classification is 3:2E
Star training set for 438028, (2020/04/25 09:59UT) Object RA Dec mag sep mel Spica 13:26:16.0 -11:16:00 1.0 17.20 142 27Bet Lib 15:18:06.2 -09:27:24 2.6 12.16 167 5 Lib 14:47:05.2 -15:32:38 6.5 2.95 162 PPM 228892 14:31:20.9 -15:20:15 7.5 0.85 159 PPM 228973 14:34:46.9 -15:11:55 9.8 0.29 159 438028 14:34:50.1 -15:29:28 15.7 160 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
3.1 sigma about the mid-time.
The median site spacing is 10.4 km
RECON observability=1.0 and success probability=1.7%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Clarence Fulton | 09:59:25 | -20.8 | Dark | Down | 20.5 | 206.8 | Low | 09:44:25 - 10:14:25 | 7569 |
| Kelowna | 09:59:24 | -21.1 | Dark | Down | 20.9 | 206.7 | Low | 09:44:24 - 10:14:24 | 7554 |
| Peachland | 09:59:26 | -21.3 | Dark | Down | 21.1 | 206.5 | Low | 09:44:26 - 10:14:26 | 7546 |
| Summerland | 09:59:25 | -21.4 | Dark | Down | 21.2 | 206.6 | Low | 09:44:25 - 10:14:25 | 7542 |
| Penticton | 09:59:24 | -21.5 | Dark | Down | 21.2 | 206.7 | Low | 09:44:24 - 10:14:24 | 7541 |
| Oliver | 09:59:23 | -21.8 | Dark | Down | 21.5 | 206.7 | Low | 09:44:23 - 10:14:23 | 7529 |
| Anarchist Mountain Observatory | 09:59:22 | -21.8 | Dark | Down | 21.6 | 207.0 | Low | 09:44:22 - 10:14:22 | 7526 |
| Tonasket | 09:59:22 | -22.1 | Dark | Down | 21.9 | 207.0 | Low | 09:44:22 - 10:14:22 | 7513 |
| Okanogan | 09:59:22 | -22.5 | Dark | Down | 22.2 | 206.9 | Low | 09:44:22 - 10:14:22 | 7499 |
| Brewster | 09:59:22 | -22.8 | Dark | Down | 22.5 | 206.7 | Low | 09:44:22 - 10:14:22 | 7486 |
| Manson/Chelan | 09:59:22 | -23.1 | Dark | Down | 22.8 | 206.4 | Low | 09:44:22 - 10:14:22 | 7473 |
| Entiat | 09:59:22 | -23.3 | Dark | Down | 23.1 | 206.4 | Low | 09:44:22 - 10:14:22 | 7463 |
| Wenatchee | 09:59:23 | -23.5 | Dark | Down | 23.3 | 206.3 | Low | 09:44:23 - 10:14:23 | 7452 |
| Victoria | 09:59:33 | -23.6 | Dark | Down | 23.2 | 203.0 | Low | 09:44:33 - 10:14:33 | 7450 |
| Ellensburg | 09:59:22 | -24.0 | Dark | Down | 23.8 | 206.2 | Low | 09:44:22 - 10:14:22 | 7433 |
| Pasco | 09:59:16 | -24.1 | Dark | Down | 24.0 | 207.7 | Low | 09:44:16 - 10:14:16 | 7423 |
| Yakima | 09:59:21 | -24.3 | Dark | Down | 24.1 | 206.2 | Low | 09:44:21 - 10:14:21 | 7416 |
| PNWRO | 09:59:15 | -24.2 | Dark | Down | 24.1 | 208.0 | Low | 09:44:15 - 10:14:15 | 7416 |
| Toppenish/White Swan | 09:59:21 | -24.4 | Dark | Down | 24.3 | 206.4 | Low | 09:44:21 - 10:14:21 | 7410 |
| Goldendale | 09:59:22 | -25.1 | Dark | Down | 24.9 | 206.1 | Low | 09:44:22 - 10:14:22 | 7381 |
| The Dalles | 09:59:21 | -25.4 | Dark | Down | 25.2 | 205.8 | Low | 09:44:21 - 10:14:21 | 7366 |
| Maupin | 09:59:20 | -25.7 | Dark | Down | 25.6 | 206.0 | Low | 09:44:20 - 10:14:20 | 7350 |
| Redmond | 09:59:18 | -26.5 | Dark | Down | 26.4 | 206.1 | Low | 09:44:18 - 10:14:18 | 7309 |
| Sisters | 09:59:19 | -26.6 | Dark | Down | 26.5 | 205.7 | Low | 09:44:19 - 10:14:19 | 7304 |
| Niwot | 09:58:22 | -22.2 | Dark | Down | 23.3 | 222.3 | Low | 09:43:22 - 10:13:22 | 7300 |
| Bend | 09:59:18 | -26.7 | Dark | Down | 26.6 | 206.0 | Low | 09:44:18 - 10:14:18 | 7298 |
| SwRI | 09:58:22 | -22.3 | Dark | Down | 23.4 | 222.2 | Low | 09:43:22 - 10:13:22 | 7293 |
| Oregon Observatory | 09:59:19 | -26.9 | Dark | Down | 26.8 | 205.9 | Low | 09:44:19 - 10:14:19 | 7288 |
| La Pine/Gilchrist | 09:59:18 | -27.1 | Dark | Down | 27.0 | 205.9 | Low | 09:44:18 - 10:14:18 | 7278 |
| North Lake | 09:59:15 | -27.3 | Dark | Down | 27.2 | 206.6 | Low | 09:44:15 - 10:14:15 | 7267 |
| Paisley | 09:59:13 | -27.6 | Dark | Down | 27.6 | 207.1 | Low | 09:44:13 - 10:14:13 | 7247 |
| Lakeview | 09:59:11 | -27.9 | Dark | Down | 28.0 | 207.4 | Low | 09:44:11 - 10:14:11 | 7225 |
| Klamath Falls | 09:59:16 | -28.5 | Dark | Down | 28.4 | 205.9 | Low | 09:44:16 - 10:14:16 | 7205 |
| Cedarville | 09:59:09 | -28.4 | Dark | Down | 28.5 | 207.7 | Low | 09:44:09 - 10:14:09 | 7196 |
| Fall River/Burney | 09:59:13 | -29.3 | Dark | Down | 29.4 | 206.6 | Low | 09:44:13 - 10:14:13 | 7152 |
| Susanville | 09:59:09 | -29.6 | Dark | Down | 29.7 | 207.5 | Low | 09:44:09 - 10:14:09 | 7133 |
| Gimple | 09:59:09 | -29.9 | Dark | Down | 30.0 | 207.4 | Up | 09:44:09 - 10:14:09 | 7115 |
| Greenville | 09:59:09 | -29.9 | Dark | Down | 30.0 | 207.3 | Up | 09:44:09 - 10:14:09 | 7114 |
| Portola | 09:59:07 | -30.0 | Dark | Down | 30.2 | 207.8 | Up | 09:44:07 - 10:14:07 | 7105 |
| Quincy | 09:59:08 | -30.1 | Dark | Down | 30.2 | 207.3 | Up | 09:44:08 - 10:14:08 | 7103 |
| Reno | 09:59:04 | -29.9 | Dark | Down | 30.2 | 208.6 | Up | 09:44:04 - 10:14:04 | 7101 |
| Carson City | 09:59:03 | -30.2 | Dark | Down | 30.5 | 208.7 | Up | 09:44:03 - 10:14:03 | 7082 |
| Yerington | 09:59:01 | -30.1 | Dark | Down | 30.4 | 209.4 | Up | 09:44:01 - 10:14:01 | 7082 |
| Gardnerville | 09:59:03 | -30.4 | Dark | Down | 30.7 | 208.8 | Up | 09:44:03 - 10:14:03 | 7070 |
| Hawthorne | 09:58:58 | -30.2 | Dark | Down | 30.6 | 210.1 | Up | 09:43:58 - 10:13:58 | 7065 |
| Tonopah | 09:58:52 | -29.9 | Dark | Down | 30.5 | 211.6 | Up | 09:43:52 - 10:13:52 | 7061 |
| Lee Vining | 09:58:59 | -30.9 | Dark | Down | 31.3 | 209.7 | Up | 09:43:59 - 10:13:59 | 7027 |
| Bishop | 09:58:55 | -31.1 | Dark | Down | 31.5 | 210.6 | Up | 09:43:55 - 10:13:55 | 7005 |
| Beatty | 09:58:49 | -30.6 | Dark | Down | 31.2 | 212.4 | Up | 09:43:49 - 10:13:49 | 7003 |
| Indian Springs | 09:58:44 | -30.4 | Dark | Down | 31.1 | 213.6 | Up | 09:43:44 - 10:13:44 | 7000 |
| Henderson | 09:58:41 | -30.4 | Dark | Down | 31.2 | 214.5 | Up | 09:43:41 - 10:13:41 | 6979 |
| Patrick | 09:58:36 | -30.3 | Dark | Down | 31.2 | 215.8 | Up | 09:43:36 - 10:13:36 | 6958 |
| DCO | 09:58:33 | -30.1 | Dark | Down | 31.1 | 216.6 | Up | 09:43:33 - 10:13:33 | 6950 |
| Searchlight/Boulder City | 09:58:39 | -30.8 | Dark | Down | 31.6 | 214.7 | Up | 09:43:39 - 10:13:39 | 6947 |
| Kingman/Dolan Springs | 09:58:36 | -30.6 | Dark | Down | 31.5 | 215.7 | Up | 09:43:36 - 10:13:36 | 6943 |
| Laughlin/Bullhead City | 09:58:38 | -30.9 | Dark | Down | 31.7 | 215.2 | Up | 09:43:38 - 10:13:38 | 6934 |
| Mohave Valley | 09:58:37 | -31.1 | Dark | Down | 31.9 | 215.3 | Up | 09:43:37 - 10:13:37 | 6918 |
| Lake Havasu City | 09:58:35 | -31.2 | Dark | Down | 32.2 | 215.6 | Up | 09:43:35 - 10:13:35 | 6898 |
| George/Scottsdale | 09:58:25 | -30.4 | Dark | Down | 31.6 | 218.3 | Up | 09:43:25 - 10:13:25 | 6883 |
| Parker | 09:58:34 | -31.5 | Dark | Down | 32.4 | 215.8 | Up | 09:43:34 - 10:13:34 | 6877 |
| CPSLO | 09:58:58 | -33.8 | Dark | Down | 34.2 | 209.0 | Up | 09:43:58 - 10:13:58 | 6849 |
| Blythe | 09:58:36 | -32.0 | Dark | Down | 33.0 | 215.7 | Up | 09:43:36 - 10:13:36 | 6841 |
| Idyllwild | 09:58:42 | -33.1 | Dark | Down | 33.9 | 213.6 | Up | 09:43:42 - 10:13:42 | 6819 |
| Wildwood | 09:58:49 | -33.8 | Dark | Down | 34.4 | 211.5 | Up | 09:43:49 - 10:13:49 | 6810 |
| Calipatria | 09:58:36 | -32.9 | Dark | Down | 33.9 | 215.0 | Up | 09:43:36 - 10:13:36 | 6797 |
| Yuma | 09:58:32 | -32.7 | Dark | Down | 33.8 | 216.0 | Up | 09:43:32 - 10:13:32 | 6783 |
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 438028, (2020/04/25 09:59UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 17.20 142 27Bet Lib 15:17:00.3 -09:22:59 2.6 12.16 167 5 Lib 14:45:57.7 -15:27:34 6.5 2.95 162 PPM 228892 14:30:13.9 -15:14:53 7.5 0.85 159 PPM 228973 14:33:39.8 -15:06:37 9.8 0.29 159 438028 14:33:43.0 -15:24:09 15.7 159 Positions are for J2000
Event circumstances last updated at 2020/03/16 21:25:04 UT
Marc W. Buie, Southwest Research Institute