Event between (471137) 10ET65 and star GA0860:04157217 with event index number of 1087911
Geocentric closest approach at 2021/03/18 04:35:40 UTC
J2000 position of star is 13:03:34.1 -03:00:01
Equinox of date position of star is 13:04:39.7 -03:06:49
Stellar brightness G=16.9,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 145 degrees from the moon.
Moon is 20% illuminated.
TNO apparent brightness V=21.3
[RECON map]
TNO is 39.9 AU from the Sun
and 38.9 AU from the Earth.
The TNO is moving 23.8
km/sec on the sky relative to the star, or,
3.0 arcsec/hr.
The 1-sigma error in the time of the event is 71 seconds.
The 1-sigma cross-track error in the shadow position is
1597 km.
The sky-plane scale is
28232.5 km/arcsec.
The TNO has an absolute magnitude Hv=5.3
Diameter=532.1 km assuming a 5% albedo -- 22.4 sec chord
Diameter=217.2 km assuming a 30% albedo -- 9.1 sec chord
Dynamical classification is SCATNEAR
Star training set for 471137, (2021/03/18 04:35UT) Object RA Dec mag sep mel Spica 13:26:18.8 -11:16:17 1.0 9.76 153 46 Vir 13:01:41.6 -03:28:56 6.0 0.83 145 PPM 196125 13:04:58.7 -03:19:54 7.9 0.23 145 PPM 178947 13:04:22.7 -03:04:40 9.9 0.08 145 471137 13:04:39.8 -03:06:49 16.9 146 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 0.0 km
RECON observability=0.0 and success probability=0.0%
| 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 | 04:39:45 | -24.2 | Dark | Up | 10.7 | 108.1 | Really Low | 04:33:20 - 04:46:10 | -3654 |
| Kelowna | 04:39:47 | -24.4 | Dark | Up | 10.7 | 107.9 | Really Low | 04:33:22 - 04:46:12 | -3696 |
| Peachland | 04:39:46 | -24.3 | Dark | Up | 10.6 | 107.6 | Really Low | 04:33:21 - 04:46:11 | -3711 |
| Summerland | 04:39:46 | -24.4 | Dark | Up | 10.7 | 107.7 | Really Low | 04:33:21 - 04:46:11 | -3725 |
| Penticton | 04:39:46 | -24.5 | Dark | Up | 10.8 | 107.8 | Really Low | 04:33:21 - 04:46:11 | -3730 |
| Oliver | 04:39:47 | -24.7 | Dark | Up | 10.9 | 107.7 | Really Low | 04:33:22 - 04:46:12 | -3766 |
| Anarchist Mountain Observatory | 04:39:47 | -24.9 | Dark | Up | 11.0 | 107.8 | Really Low | 04:33:22 - 04:46:12 | -3780 |
| Tonasket | 04:39:47 | -25.0 | Dark | Up | 11.1 | 107.7 | Really Low | 04:33:22 - 04:46:12 | -3813 |
| Okanogan | 04:39:48 | -25.1 | Dark | Up | 11.1 | 107.5 | Really Low | 04:33:23 - 04:46:13 | -3849 |
| Brewster | 04:39:48 | -25.1 | Dark | Up | 11.1 | 107.3 | Really Low | 04:33:23 - 04:46:13 | -3880 |
| Victoria | 04:39:50 | -22.8 | Dark | Up | 8.6 | 104.6 | Really Low | 04:33:25 - 04:46:15 | -3891 |
| Manson/Chelan | 04:39:49 | -25.0 | Dark | Up | 10.9 | 107.0 | Really Low | 04:33:24 - 04:46:14 | -3907 |
| Wenatchee | 04:39:49 | -25.1 | Dark | Up | 10.9 | 106.8 | Really Low | 04:33:24 - 04:46:14 | -3959 |
| Ellensburg | 04:39:50 | -25.2 | Dark | Up | 10.9 | 106.5 | Really Low | 04:33:25 - 04:46:15 | -4005 |
| Yakima | 04:39:51 | -25.4 | Dark | Up | 11.0 | 106.4 | Really Low | 04:33:26 - 04:46:16 | -4047 |
| Pasco | 04:39:51 | -26.4 | Dark | Up | 12.0 | 107.5 | Really Low | 04:33:26 - 04:46:16 | -4058 |
| Toppenish/White Swan | 04:39:51 | -25.6 | Dark | Up | 11.2 | 106.5 | Really Low | 04:33:26 - 04:46:16 | -4067 |
| PNWRO | 04:39:50 | -26.6 | Dark | Up | 12.3 | 107.6 | Really Low | 04:33:25 - 04:46:15 | -4079 |
| Goldendale | 04:39:52 | -25.6 | Dark | Up | 11.0 | 106.1 | Really Low | 04:33:27 - 04:46:17 | -4131 |
| The Dalles | 04:39:52 | -25.4 | Dark | Up | 10.9 | 105.8 | Really Low | 04:33:27 - 04:46:17 | -4160 |
| Maupin | 04:39:53 | -25.7 | Dark | Up | 11.0 | 105.8 | Really Low | 04:33:28 - 04:46:18 | -4202 |
| Redmond | 04:39:53 | -26.1 | Dark | Up | 11.2 | 105.6 | Really Low | 04:33:28 - 04:46:18 | -4298 |
| Sisters | 04:39:54 | -25.8 | Dark | Up | 11.0 | 105.3 | Really Low | 04:33:29 - 04:46:19 | -4302 |
| Bend | 04:39:54 | -26.1 | Dark | Up | 11.2 | 105.4 | Really Low | 04:33:29 - 04:46:19 | -4322 |
| Oregon Observatory | 04:39:54 | -26.1 | Dark | Up | 11.1 | 105.3 | Really Low | 04:33:29 - 04:46:19 | -4343 |
| Dunrhomin | 04:39:37 | -38.1 | Dark | Up | 23.7 | 116.5 | Low | 04:33:12 - 04:46:02 | -4357 |
| La Pine/Gilchrist | 04:39:55 | -26.1 | Dark | Up | 11.2 | 105.2 | Really Low | 04:33:30 - 04:46:20 | -4365 |
| North Lake | 04:39:54 | -26.7 | Dark | Up | 11.7 | 105.6 | Really Low | 04:33:29 - 04:46:19 | -4401 |
| Paisley | 04:39:55 | -27.2 | Dark | Up | 12.1 | 105.7 | Really Low | 04:33:30 - 04:46:20 | -4453 |
| Chiloquin | 04:39:56 | -26.4 | Dark | Up | 11.2 | 104.7 | Really Low | 04:33:31 - 04:46:21 | -4488 |
| Lakeview | 04:39:55 | -27.5 | Dark | Up | 12.4 | 105.7 | Really Low | 04:33:30 - 04:46:20 | -4502 |
| Klamath Falls | 04:39:56 | -26.6 | Dark | Up | 11.3 | 104.7 | Really Low | 04:33:31 - 04:46:21 | -4523 |
| Cedarville | 04:39:55 | -28.0 | Dark | Up | 12.7 | 105.7 | Really Low | 04:33:30 - 04:46:20 | -4569 |
| Fall River/Burney | 04:39:57 | -27.3 | Dark | Up | 11.9 | 104.8 | Really Low | 04:33:32 - 04:46:22 | -4641 |
| Susanville | 04:39:57 | -28.1 | Dark | Up | 12.6 | 105.1 | Really Low | 04:33:32 - 04:46:22 | -4695 |
| Gimple | 04:39:57 | -28.1 | Dark | Up | 12.5 | 104.9 | Really Low | 04:33:32 - 04:46:22 | -4729 |
| Greenville | 04:39:57 | -28.0 | Dark | Up | 12.5 | 104.9 | Really Low | 04:33:32 - 04:46:22 | -4730 |
| Quincy | 04:39:57 | -28.1 | Dark | Up | 12.5 | 104.8 | Really Low | 04:33:32 - 04:46:22 | -4751 |
| Portola | 04:39:57 | -28.5 | Dark | Up | 12.9 | 105.1 | Really Low | 04:33:32 - 04:46:22 | -4756 |
| Reno | 04:39:56 | -29.1 | Dark | Up | 13.5 | 105.5 | Really Low | 04:33:31 - 04:46:21 | -4773 |
| Carson City | 04:39:56 | -29.2 | Dark | Up | 13.6 | 105.5 | Really Low | 04:33:31 - 04:46:21 | -4810 |
| Yerington | 04:39:56 | -29.8 | Dark | Up | 14.1 | 105.8 | Really Low | 04:33:31 - 04:46:21 | -4819 |
| Gardnerville | 04:39:57 | -29.4 | Dark | Up | 13.7 | 105.4 | Really Low | 04:33:32 - 04:46:22 | -4835 |
| Hawthorne | 04:39:55 | -30.4 | Dark | Up | 14.6 | 106.1 | Really Low | 04:33:30 - 04:46:20 | -4858 |
| Tonopah | 04:39:55 | -31.6 | Dark | Up | 15.8 | 106.9 | Really Low | 04:33:30 - 04:46:20 | -4879 |
| Lee Vining | 04:39:57 | -30.3 | Dark | Up | 14.4 | 105.6 | Really Low | 04:33:32 - 04:46:22 | -4927 |
| Bishop | 04:39:56 | -31.0 | Dark | Up | 15.1 | 106.0 | Really Low | 04:33:31 - 04:46:21 | -4977 |
| Beatty | 04:39:55 | -32.4 | Dark | Up | 16.5 | 106.9 | Really Low | 04:33:30 - 04:46:20 | -4992 |
| Indian Springs | 04:39:53 | -33.3 | Dark | Up | 17.4 | 107.5 | Really Low | 04:33:28 - 04:46:18 | -5003 |
| Henderson | 04:39:53 | -34.1 | Dark | Up | 18.1 | 107.8 | Really Low | 04:33:28 - 04:46:18 | -5044 |
| Patrick | 04:39:53 | -35.2 | Dark | Up | 19.2 | 108.4 | Really Low | 04:33:28 - 04:46:18 | -5084 |
| Kingman/Dolan Springs | 04:39:51 | -35.1 | Dark | Up | 19.1 | 108.2 | Really Low | 04:33:26 - 04:46:16 | -5112 |
| Laughlin/Bullhead City | 04:39:53 | -34.8 | Dark | Up | 18.7 | 107.8 | Really Low | 04:33:28 - 04:46:18 | -5127 |
| Mohave Valley | 04:39:53 | -34.9 | Dark | Up | 18.8 | 107.8 | Really Low | 04:33:28 - 04:46:18 | -5156 |
| Lake Havasu City | 04:39:52 | -35.3 | Dark | Up | 19.1 | 107.8 | Really Low | 04:33:27 - 04:46:17 | -5192 |
| George/Scottsdale | 04:39:49 | -37.4 | Dark | Up | 21.3 | 109.1 | Low | 04:33:24 - 04:46:14 | -5214 |
| Parker | 04:39:52 | -35.4 | Dark | Up | 19.3 | 107.7 | Really Low | 04:33:27 - 04:46:17 | -5229 |
| CPSLO | 04:39:59 | -30.2 | Dark | Up | 13.9 | 104.0 | Really Low | 04:33:34 - 04:46:24 | -5242 |
| Blythe | 04:39:52 | -35.5 | Dark | Up | 19.2 | 107.3 | Really Low | 04:33:27 - 04:46:17 | -5292 |
| Idyllwild | 04:39:56 | -33.8 | Dark | Up | 17.5 | 106.0 | Really Low | 04:33:31 - 04:46:21 | -5329 |
| Wildwood | 04:39:57 | -32.3 | Dark | Up | 15.9 | 105.0 | Really Low | 04:33:32 - 04:46:22 | -5331 |
| Calipatria | 04:39:53 | -35.0 | Dark | Up | 18.6 | 106.6 | Really Low | 04:33:28 - 04:46:18 | -5367 |
| Yuma | 04:39:52 | -35.8 | Dark | Up | 19.4 | 107.0 | Really Low | 04:33:27 - 04:46:17 | -5392 |
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 471137, (2021/03/18 04:35UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 9.76 153 46 Vir 13:00:35.9 -03:22:06 6.0 0.83 145 PPM 196125 13:03:53.0 -03:13:05 7.9 0.23 145 PPM 178947 13:03:17.1 -02:57:51 9.9 0.08 145 471137 13:03:34.1 -03:00:01 16.9 145 Positions are for J2000
Event circumstances last updated at 2021/03/12 00:55:30 UT
Marc W. Buie, Southwest Research Institute