Event between (40314) 99KR16 and star GA0840:04940591 with event index number of 1161327
Geocentric closest approach at 2021/04/20 08:28:47 UTC
J2000 position of star is 16:21:14.0 -05:05:14
Equinox of date position of star is 16:22:21.0 -05:08:09
Stellar brightness G=14.7,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 120 degrees from the moon.
Moon is 51% illuminated.
TNO apparent brightness V=21.1
[RECON map]
TNO is 34.4 AU from the Sun
and 33.6 AU from the Earth.
The TNO is moving 19.9
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 79 seconds.
The 1-sigma cross-track error in the shadow position is
1330 km.
The sky-plane scale is
24335.0 km/arcsec.
The TNO has an absolute magnitude Hv=5.7
Diameter=434.5 km assuming a 5% albedo -- 21.8 sec chord
Diameter=177.4 km assuming a 30% albedo -- 8.9 sec chord
Dynamical classification is SCATNEAR
Star training set for 40314, (2021/04/20 08:29UT) Object RA Dec mag sep mel Antares 16:30:43.0 -26:28:39 0.9 21.43 129 1Del Oph 16:15:27.8 -03:44:52 2.7 2.21 118 2Eps Oph 16:19:27.0 -04:44:34 3.2 0.83 119 PPM 199550 16:21:23.5 -04:36:28 8.5 0.58 120 PPM 199567 16:22:18.0 -04:55:00 9.0 0.22 120 40314 16:22:21.8 -05:08:11 14.7 121 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 18.3 km
RECON observability=1.0 and success probability=2.4%
| 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 | 08:32:17 | -27.6 | Dark | Up | 29.7 | 147.6 | Low | 08:25:12 - 08:39:21 | 4899 |
| Kelowna | 08:32:17 | -28.0 | Dark | Up | 29.9 | 147.3 | Low | 08:25:13 - 08:39:22 | 4864 |
| Peachland | 08:32:18 | -28.1 | Dark | Up | 29.9 | 146.9 | Low | 08:25:13 - 08:39:22 | 4845 |
| Summerland | 08:32:18 | -28.3 | Dark | Up | 30.1 | 147.0 | Up | 08:25:13 - 08:39:22 | 4837 |
| Penticton | 08:32:18 | -28.3 | Dark | Up | 30.2 | 147.1 | Up | 08:25:13 - 08:39:22 | 4836 |
| Oliver | 08:32:18 | -28.7 | Dark | Up | 30.5 | 147.0 | Up | 08:25:13 - 08:39:22 | 4809 |
| Anarchist Mountain Observatory | 08:32:17 | -28.8 | Dark | Up | 30.7 | 147.1 | Up | 08:25:13 - 08:39:22 | 4803 |
| Tonasket | 08:32:17 | -29.1 | Dark | Up | 30.9 | 147.0 | Up | 08:25:13 - 08:39:22 | 4776 |
| Okanogan | 08:32:17 | -29.5 | Dark | Up | 31.1 | 146.7 | Up | 08:25:13 - 08:39:22 | 4745 |
| Brewster | 08:32:18 | -29.8 | Dark | Up | 31.3 | 146.4 | Up | 08:25:14 - 08:39:23 | 4717 |
| Manson/Chelan | 08:32:19 | -30.0 | Dark | Up | 31.3 | 145.9 | Up | 08:25:15 - 08:39:24 | 4687 |
| Dunrhomin | 08:31:28 | -33.9 | Dark | Up | 42.9 | 160.9 | Up | 08:24:23 - 08:38:32 | 4666 |
| Wenatchee | 08:32:20 | -30.5 | Dark | Up | 31.7 | 145.6 | Up | 08:25:15 - 08:39:24 | 4644 |
| Victoria | 08:32:28 | -29.7 | Dark | Up | 29.6 | 142.7 | Low | 08:25:24 - 08:39:33 | 4627 |
| Ellensburg | 08:32:21 | -30.9 | Dark | Up | 31.9 | 145.2 | Up | 08:25:16 - 08:39:25 | 4603 |
| Pasco | 08:32:16 | -31.5 | Dark | Up | 33.1 | 146.5 | Up | 08:25:12 - 08:39:21 | 4594 |
| PNWRO | 08:32:16 | -31.7 | Dark | Up | 33.4 | 146.6 | Up | 08:25:12 - 08:39:21 | 4583 |
| Yakima | 08:32:20 | -31.4 | Dark | Up | 32.2 | 145.0 | Up | 08:25:15 - 08:39:24 | 4570 |
| Toppenish/White Swan | 08:32:20 | -31.5 | Dark | Up | 32.5 | 145.1 | Up | 08:25:15 - 08:39:24 | 4559 |
| Goldendale | 08:32:21 | -32.1 | Dark | Up | 32.8 | 144.5 | Up | 08:25:16 - 08:39:25 | 4499 |
| The Dalles | 08:32:23 | -32.4 | Dark | Up | 32.8 | 144.0 | Up | 08:25:18 - 08:39:27 | 4468 |
| Maupin | 08:32:22 | -32.8 | Dark | Up | 33.2 | 143.9 | Up | 08:25:17 - 08:39:26 | 4437 |
| Redmond | 08:32:22 | -33.7 | Dark | Up | 33.9 | 143.5 | Up | 08:25:17 - 08:39:26 | 4360 |
| Sisters | 08:32:23 | -33.7 | Dark | Up | 33.7 | 143.1 | Up | 08:25:19 - 08:39:28 | 4347 |
| Bend | 08:32:22 | -33.9 | Dark | Up | 34.0 | 143.2 | Up | 08:25:18 - 08:39:27 | 4337 |
| Oregon Observatory | 08:32:21 | -34.1 | Dark | Up | 34.1 | 143.0 | Up | 08:25:17 - 08:39:26 | 4318 |
| La Pine/Gilchrist | 08:32:23 | -34.3 | Dark | Up | 34.2 | 142.9 | Up | 08:25:19 - 08:39:28 | 4298 |
| North Lake | 08:32:21 | -34.7 | Dark | Up | 34.8 | 143.4 | Up | 08:25:17 - 08:39:26 | 4284 |
| Paisley | 08:32:20 | -35.2 | Dark | Up | 35.4 | 143.5 | Up | 08:25:16 - 08:39:25 | 4252 |
| Lakeview | 08:32:19 | -35.7 | Dark | Up | 35.9 | 143.5 | Up | 08:25:15 - 08:39:24 | 4216 |
| Cedarville | 08:32:19 | -36.3 | Dark | Up | 36.5 | 143.4 | Up | 08:25:14 - 08:39:23 | 4167 |
| Klamath Falls | 08:32:23 | -35.8 | Dark | Up | 35.2 | 142.0 | Up | 08:25:19 - 08:39:28 | 4165 |
| Fall River/Burney | 08:32:22 | -36.9 | Dark | Up | 36.3 | 141.9 | Up | 08:25:18 - 08:39:27 | 4079 |
| Susanville | 08:32:20 | -37.5 | Dark | Up | 37.2 | 142.4 | Up | 08:25:16 - 08:39:25 | 4054 |
| Gimple | 08:32:21 | -37.8 | Dark | Up | 37.3 | 142.0 | Up | 08:25:16 - 08:39:25 | 4021 |
| Greenville | 08:32:21 | -37.8 | Dark | Up | 37.3 | 141.9 | Up | 08:25:16 - 08:39:25 | 4018 |
| Reno | 08:32:17 | -38.2 | Dark | Up | 38.3 | 142.9 | Up | 08:25:12 - 08:39:21 | 4012 |
| Portola | 08:32:18 | -38.0 | Dark | Up | 37.7 | 142.3 | Up | 08:25:13 - 08:39:22 | 4009 |
| Quincy | 08:32:21 | -38.0 | Dark | Up | 37.4 | 141.8 | Up | 08:25:16 - 08:39:25 | 4001 |
| Yerington | 08:32:14 | -38.6 | Dark | Up | 39.0 | 143.4 | Up | 08:25:10 - 08:39:19 | 3990 |
| Tonopah | 08:32:07 | -39.2 | Dark | Up | 40.6 | 145.1 | Up | 08:25:03 - 08:39:12 | 3989 |
| Carson City | 08:32:15 | -38.6 | Dark | Up | 38.5 | 142.7 | Up | 08:25:11 - 08:39:20 | 3982 |
| Hawthorne | 08:32:13 | -39.0 | Dark | Up | 39.6 | 143.7 | Up | 08:25:08 - 08:39:17 | 3971 |
| Gardnerville | 08:32:16 | -38.8 | Dark | Up | 38.8 | 142.7 | Up | 08:25:12 - 08:39:21 | 3962 |
| Indian Springs | 08:32:01 | -40.3 | Dark | Up | 42.5 | 146.2 | Up | 08:24:57 - 08:39:06 | 3924 |
| Henderson | 08:31:57 | -40.7 | Dark | Up | 43.3 | 146.7 | Up | 08:24:52 - 08:39:01 | 3908 |
| Beatty | 08:32:05 | -40.3 | Dark | Up | 41.8 | 145.1 | Up | 08:25:00 - 08:39:09 | 3907 |
| Lee Vining | 08:32:13 | -39.7 | Dark | Up | 39.8 | 142.9 | Up | 08:25:08 - 08:39:17 | 3903 |
| Patrick | 08:31:54 | -41.0 | Dark | Up | 44.3 | 147.8 | Up | 08:24:49 - 08:38:58 | 3901 |
| Bishop | 08:32:10 | -40.1 | Dark | Up | 40.7 | 143.4 | Up | 08:25:05 - 08:39:14 | 3880 |
| Kingman/Dolan Springs | 08:31:54 | -41.3 | Dark | Up | 44.4 | 147.4 | Up | 08:24:50 - 08:38:59 | 3874 |
| Laughlin/Bullhead City | 08:31:56 | -41.4 | Dark | Up | 44.2 | 146.8 | Up | 08:24:52 - 08:39:01 | 3849 |
| George/Scottsdale | 08:31:44 | -42.0 | Dark | Up | 46.6 | 149.4 | Up | 08:24:40 - 08:38:49 | 3842 |
| Mohave Valley | 08:31:56 | -41.7 | Dark | Up | 44.4 | 146.6 | Up | 08:24:52 - 08:39:01 | 3826 |
| Lake Havasu City | 08:31:55 | -42.0 | Dark | Up | 44.9 | 146.7 | Up | 08:24:50 - 08:38:59 | 3802 |
| Parker | 08:31:53 | -42.3 | Dark | Up | 45.2 | 146.5 | Up | 08:24:49 - 08:38:58 | 3772 |
| Blythe | 08:31:55 | -42.9 | Dark | Up | 45.5 | 145.9 | Up | 08:24:50 - 08:38:59 | 3713 |
| Idyllwild | 08:32:03 | -43.3 | Dark | Up | 44.4 | 143.4 | Up | 08:24:58 - 08:39:07 | 3631 |
| Yuma | 08:31:54 | -43.8 | Dark | Up | 46.2 | 145.3 | Up | 08:24:49 - 08:38:58 | 3630 |
| Calipatria | 08:31:58 | -43.6 | Dark | Up | 45.4 | 144.4 | Up | 08:24:54 - 08:39:03 | 3628 |
| CPSLO | 08:32:17 | -42.5 | Dark | Up | 41.1 | 139.7 | Up | 08:25:13 - 08:39:22 | 3603 |
| Wildwood | 08:32:08 | -43.3 | Dark | Up | 43.1 | 141.4 | Up | 08:25:04 - 08:39:13 | 3582 |
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 40314, (2021/04/20 08:29UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 21.43 129 1Del Oph 16:14:20.7 -03:41:43 2.7 2.21 118 2Eps Oph 16:18:19.4 -04:41:32 3.2 0.83 119 PPM 199550 16:20:15.9 -04:33:29 8.5 0.58 120 PPM 199567 16:21:10.3 -04:52:02 9.0 0.22 120 40314 16:21:14.0 -05:05:14 14.7 120 Positions are for J2000
Event circumstances last updated at 2021/01/20 20:42:56 UT
Marc W. Buie, Southwest Research Institute