Event between (523761) 14WU509 and star GA0940:00907890 with event index number of 348675
Geocentric closest approach at 2020/01/19 04:59:49 UTC
J2000 position of star is 05:46:08.2 +04:06:42
Equinox of date position of star is 05:47:11.7 +04:07:05
Stellar brightness G=15.3,
use SENSEUP=128
Star is 141 degrees from the moon.
Moon is 32% illuminated.
TNO apparent brightness V=22.0
[RECON map]
TNO is 40.7 AU from the Sun
and 39.9 AU from the Earth.
The TNO is moving 21.6
km/sec on the sky relative to the star, or,
2.7 arcsec/hr.
The 1-sigma error in the time of the event is 89 seconds.
The 1-sigma cross-track error in the shadow position is
1503 km.
The sky-plane scale is
28941.7 km/arcsec.
The TNO has an absolute magnitude Hv=5.9
Diameter=398.1 km assuming a 5% albedo -- 18.4 sec chord
Diameter=162.5 km assuming a 30% albedo -- 7.5 sec chord
Dynamical classification is SCATEXTD
Star training set for 523761, (2020/01/19 05:00UT) Object RA Dec mag sep mel Betelgeuse 05:56:15.5 +07:24:33 0.4 3.99 140 34Del Ori 05:33:01.9 -00:17:09 2.2 5.65 143 52 Ori 05:49:04.8 +06:27:35 5.5 2.39 142 PPM 149462 05:48:33.5 +04:06:22 7.5 0.34 141 PPM 149444 05:47:58.5 +04:14:22 9.7 0.23 141 PPM 149412 05:46:36.3 +04:09:52 11.2 0.15 142 523761 05:47:11.8 +04:07:05 15.3 141 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 21.4 km
RECON observability=1.0 and success probability=26.6%
| 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 | 05:01:13 | -42.9 | Dark | Down | 42.7 | 163.0 | Up | 04:53:18 - 05:09:07 | 215 |
| Kelowna | 05:01:13 | -42.9 | Dark | Down | 43.0 | 162.6 | Up | 04:53:19 - 05:09:08 | 183 |
| Summerland | 05:01:14 | -42.9 | Dark | Down | 43.2 | 162.3 | Up | 04:53:19 - 05:09:08 | 159 |
| Penticton | 05:01:14 | -43.0 | Dark | Down | 43.3 | 162.4 | Up | 04:53:19 - 05:09:08 | 155 |
| Oliver | 05:01:14 | -43.1 | Dark | Down | 43.7 | 162.3 | Up | 04:53:19 - 05:09:08 | 127 |
| Anarchist Mountain Observatory | 05:01:13 | -43.3 | Dark | Down | 43.9 | 162.5 | Up | 04:53:19 - 05:09:08 | 116 |
| Tonasket | 05:01:13 | -43.3 | Dark | Down | 44.1 | 162.4 | Up | 04:53:19 - 05:09:08 | 90 |
| Okanogan | 05:01:14 | -43.4 | Dark | Down | 44.4 | 162.1 | Up | 04:53:19 - 05:09:08 | 60 |
| Brewster | 05:01:14 | -43.3 | Dark | Down | 44.6 | 161.7 | Up | 04:53:20 - 05:09:09 | 35 |
| Victoria | 05:01:26 | -40.9 | Dark | Down | 43.4 | 157.0 | Up | 04:53:32 - 05:09:21 | 24 |
| Manson/Chelan | 05:01:16 | -43.2 | Dark | Down | 44.8 | 161.1 | Up | 04:53:21 - 05:09:10 | 13 |
| Entiat | 05:01:16 | -43.2 | Dark | Down | 45.0 | 161.0 | Up | 04:53:21 - 05:09:10 | -6 |
| Wenatchee | 05:01:16 | -43.2 | Dark | Down | 45.2 | 160.8 | Up | 04:53:22 - 05:09:11 | -28 |
| Ellensburg | 05:01:17 | -43.2 | Dark | Down | 45.5 | 160.3 | Up | 04:53:23 - 05:09:12 | -65 |
| Yakima | 05:01:17 | -43.3 | Dark | Down | 45.9 | 160.1 | Up | 04:53:23 - 05:09:12 | -100 |
| Pasco | 05:01:12 | -44.3 | Dark | Down | 46.5 | 162.0 | Up | 04:53:18 - 05:09:07 | -109 |
| Toppenish/White Swan | 05:01:17 | -43.5 | Dark | Down | 46.1 | 160.3 | Up | 04:53:22 - 05:09:11 | -116 |
| PNWRO | 05:01:12 | -44.6 | Dark | Down | 46.8 | 162.3 | Up | 04:53:17 - 05:09:06 | -126 |
| Goldendale | 05:01:18 | -43.4 | Dark | Down | 46.6 | 159.5 | Up | 04:53:24 - 05:09:13 | -168 |
| The Dalles | 05:01:20 | -43.2 | Dark | Down | 46.7 | 158.9 | Up | 04:53:25 - 05:09:14 | -192 |
| Maupin | 05:01:19 | -43.4 | Dark | Down | 47.1 | 158.9 | Up | 04:53:25 - 05:09:14 | -227 |
| Redmond | 05:01:20 | -43.5 | Dark | Down | 47.9 | 158.4 | Up | 04:53:25 - 05:09:14 | -306 |
| Sisters | 05:01:21 | -43.3 | Dark | Down | 47.8 | 157.9 | Up | 04:53:27 - 05:09:16 | -309 |
| Bend | 05:01:20 | -43.5 | Dark | Down | 48.1 | 158.1 | Up | 04:53:26 - 05:09:15 | -326 |
| Oregon Observatory | 05:01:21 | -43.4 | Dark | Down | 48.2 | 157.9 | Up | 04:53:26 - 05:09:15 | -343 |
| La Pine/Gilchrist | 05:01:21 | -43.5 | Dark | Down | 48.4 | 157.7 | Up | 04:53:26 - 05:09:15 | -362 |
| North Lake | 05:01:19 | -44.0 | Dark | Down | 48.9 | 158.4 | Up | 04:53:24 - 05:09:13 | -392 |
| Niwot | 05:00:19 | -55.9 | Dark | Down | 54.0 | 182.5 | Up | 04:52:25 - 05:08:14 | -423 |
| SwRI | 05:00:20 | -55.9 | Dark | Down | 54.1 | 182.3 | Up | 04:52:25 - 05:08:14 | -435 |
| Paisley | 05:01:18 | -44.4 | Dark | Down | 49.5 | 158.7 | Up | 04:53:23 - 05:09:12 | -435 |
| Lakeview | 05:01:17 | -44.6 | Dark | Down | 50.1 | 158.7 | Up | 04:53:22 - 05:09:11 | -478 |
| Klamath Falls | 05:01:22 | -43.6 | Dark | Down | 49.6 | 156.7 | Up | 04:53:28 - 05:09:17 | -495 |
| Cedarville | 05:01:16 | -44.9 | Dark | Down | 50.7 | 158.7 | Up | 04:53:22 - 05:09:11 | -534 |
| Fall River/Burney | 05:01:21 | -44.1 | Dark | Down | 50.8 | 156.7 | Up | 04:53:26 - 05:09:15 | -595 |
| Susanville | 05:01:18 | -44.8 | Dark | Down | 51.6 | 157.5 | Up | 04:53:24 - 05:09:13 | -641 |
| Gimple | 05:01:19 | -44.7 | Dark | Down | 51.8 | 157.0 | Up | 04:53:24 - 05:09:13 | -670 |
| Greenville | 05:01:19 | -44.6 | Dark | Down | 51.8 | 156.9 | Up | 04:53:25 - 05:09:14 | -671 |
| Quincy | 05:01:19 | -44.7 | Dark | Down | 52.0 | 156.8 | Up | 04:53:25 - 05:09:14 | -690 |
| Portola | 05:01:17 | -45.0 | Dark | Down | 52.2 | 157.5 | Up | 04:53:23 - 05:09:12 | -694 |
| Reno | 05:01:15 | -45.6 | Dark | Down | 52.7 | 158.3 | Up | 04:53:20 - 05:09:09 | -709 |
| Carson City | 05:01:15 | -45.7 | Dark | Down | 53.0 | 158.2 | Up | 04:53:20 - 05:09:09 | -741 |
| Yerington | 05:01:12 | -46.2 | Dark | Down | 53.4 | 159.1 | Up | 04:53:18 - 05:09:07 | -750 |
| Gardnerville | 05:01:15 | -45.7 | Dark | Down | 53.3 | 158.1 | Up | 04:53:20 - 05:09:09 | -763 |
| Hawthorne | 05:01:10 | -46.7 | Dark | Down | 53.9 | 159.7 | Up | 04:53:16 - 05:09:05 | -785 |
| Tonopah | 05:01:05 | -47.8 | Dark | Down | 54.7 | 161.8 | Up | 04:53:10 - 05:08:59 | -805 |
| Lee Vining | 05:01:12 | -46.4 | Dark | Down | 54.3 | 158.6 | Up | 04:53:18 - 05:09:07 | -844 |
| Bishop | 05:01:09 | -47.1 | Dark | Down | 55.1 | 159.5 | Up | 04:53:15 - 05:09:04 | -889 |
| Beatty | 05:01:03 | -48.4 | Dark | Down | 56.0 | 162.0 | Up | 04:53:08 - 05:08:57 | -907 |
| Indian Springs | 05:00:58 | -49.3 | Dark | Down | 56.5 | 163.8 | Up | 04:53:04 - 05:08:53 | -920 |
| Henderson | 05:00:55 | -49.9 | Dark | Down | 57.2 | 164.7 | Up | 04:53:01 - 05:08:50 | -959 |
| Patrick | 05:00:51 | -50.9 | Dark | Down | 58.0 | 166.5 | Up | 04:52:56 - 05:08:45 | -999 |
| Searchlight/Boulder City | 05:00:55 | -50.1 | Dark | Down | 57.8 | 164.6 | Up | 04:53:00 - 05:08:49 | -1012 |
| DCO | 05:00:48 | -51.6 | Dark | Down | 58.4 | 167.7 | Up | 04:52:53 - 05:08:42 | -1016 |
| Kingman/Dolan Springs | 05:00:51 | -50.8 | Dark | Down | 58.2 | 166.1 | Up | 04:52:57 - 05:08:46 | -1024 |
| Laughlin/Bullhead City | 05:00:53 | -50.4 | Dark | Down | 58.1 | 165.1 | Up | 04:52:59 - 05:08:48 | -1035 |
| Mohave Valley | 05:00:53 | -50.5 | Dark | Down | 58.4 | 165.0 | Up | 04:52:59 - 05:08:48 | -1061 |
| Lake Havasu City | 05:00:52 | -50.7 | Dark | Down | 58.8 | 165.3 | Up | 04:52:57 - 05:08:46 | -1095 |
| CPSLO | 05:01:18 | -45.6 | Dark | Down | 56.3 | 154.6 | Up | 04:53:23 - 05:09:12 | -1120 |
| George/Scottsdale | 05:00:41 | -52.9 | Dark | Down | 60.0 | 169.7 | Up | 04:52:47 - 05:08:36 | -1127 |
| Parker | 05:00:52 | -50.8 | Dark | Down | 59.2 | 165.2 | Up | 04:52:57 - 05:08:46 | -1128 |
| Blythe | 05:00:53 | -50.7 | Dark | Down | 59.6 | 164.4 | Up | 04:52:58 - 05:08:47 | -1183 |
| Wildwood | 05:01:09 | -47.4 | Dark | Down | 58.1 | 157.4 | Up | 04:53:15 - 05:09:04 | -1204 |
| Idyllwild | 05:01:01 | -48.9 | Dark | Down | 59.0 | 160.5 | Up | 04:53:07 - 05:08:56 | -1207 |
| Calipatria | 05:00:56 | -50.0 | Dark | Down | 59.9 | 162.4 | Up | 04:53:02 - 05:08:51 | -1247 |
| Yuma | 05:00:52 | -50.8 | Dark | Down | 60.5 | 163.9 | Up | 04:52:58 - 05:08:47 | -1274 |
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 523761, (2020/01/19 05:00UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 3.99 140 34Del Ori 05:32:00.4 -00:17:57 2.2 5.65 143 52 Ori 05:48:00.2 +06:27:15 5.5 2.39 142 PPM 149462 05:47:30.0 +04:06:01 7.5 0.34 141 PPM 149444 05:46:54.9 +04:14:00 9.7 0.23 141 PPM 149412 05:45:32.7 +04:09:28 11.2 0.15 142 523761 05:46:08.2 +04:06:42 15.3 141 Positions are for J2000
Event circumstances last updated at 2020/01/06 20:42:03 UT
Marc W. Buie, Southwest Research Institute