Event between (15820) 94TB and star GA1220:00811506 with event index number of 1130664
Geocentric closest approach at 2021/12/09 05:32:31 UTC
J2000 position of star is 04:01:00.7 +32:51:49
Equinox of date position of star is 04:02:24.6 +32:55:26
Stellar brightness G=16.0,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 101 degrees from the moon.
Moon is 31% illuminated.
TNO apparent brightness V=21.9
[RECON map]
TNO is 27.0 AU from the Sun
and 26.1 AU from the Earth.
The TNO is moving 23.0
km/sec on the sky relative to the star, or,
4.4 arcsec/hr.
The 1-sigma error in the time of the event is 152 seconds.
The 1-sigma cross-track error in the shadow position is
1769 km.
The sky-plane scale is
18927.3 km/arcsec.
The TNO has an absolute magnitude Hv=7.6
Diameter=183.7 km assuming a 5% albedo -- 8.0 sec chord
Diameter=75.0 km assuming a 30% albedo -- 3.3 sec chord
Dynamical classification is 3:2E
Star training set for 15820, (2021/12/09 05:33UT) Object RA Dec mag sep mel Aldebaran 04:37:10.9 +16:33:06 0.8 18.16 104 44Zet Per 03:55:31.0 +31:56:49 2.8 1.75 99 PPM 069071 04:06:07.0 +32:37:46 6.5 0.83 102 PPM 069037 04:04:00.2 +32:58:09 8.2 0.34 101 PPM 069017 04:02:54.4 +33:12:27 9.8 0.30 101 PPM 068992 04:01:40.4 +32:45:56 10.2 0.22 101 15820 04:02:24.7 +32:55:26 16.0 101 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 26.7 km
RECON observability=1.0 and success probability=1.8%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Kamloops | 05:33:04 | -51.0 | Dark | Down | 67.3 | 134.4 | Up | 05:19:54 - 05:46:14 | 7098 |
| Victoria | 05:33:17 | -50.4 | Dark | Down | 67.2 | 125.2 | Up | 05:20:07 - 05:46:27 | 6998 |
| Kelowna | 05:33:03 | -52.0 | Dark | Down | 68.3 | 134.6 | Up | 05:19:53 - 05:46:13 | 6995 |
| Peachland | 05:33:04 | -51.9 | Dark | Down | 68.2 | 133.9 | Up | 05:19:54 - 05:46:14 | 6994 |
| Summerland | 05:33:04 | -52.0 | Dark | Down | 68.4 | 133.8 | Up | 05:19:54 - 05:46:14 | 6978 |
| Penticton | 05:33:04 | -52.1 | Dark | Down | 68.5 | 133.9 | Up | 05:19:54 - 05:46:14 | 6968 |
| Oliver | 05:33:05 | -52.3 | Dark | Down | 68.7 | 133.2 | Up | 05:19:55 - 05:46:15 | 6935 |
| Anarchist Mountain Observatory | 05:33:04 | -52.5 | Dark | Down | 68.9 | 133.3 | Up | 05:19:54 - 05:46:14 | 6913 |
| Tonasket | 05:33:06 | -52.6 | Dark | Down | 69.1 | 132.6 | Up | 05:19:56 - 05:46:16 | 6887 |
| Okanogan | 05:33:07 | -52.7 | Dark | Down | 69.3 | 131.6 | Up | 05:19:57 - 05:46:17 | 6860 |
| Sleaford | 05:32:21 | -56.6 | Dark | Down | 70.5 | 167.6 | Up | 05:19:11 - 05:45:31 | 6854 |
| Brewster | 05:33:09 | -52.7 | Dark | Down | 69.3 | 130.7 | Up | 05:19:59 - 05:46:19 | 6841 |
| Manson/Chelan | 05:33:10 | -52.6 | Dark | Down | 69.3 | 129.6 | Up | 05:20:00 - 05:46:20 | 6833 |
| Wenatchee | 05:33:11 | -52.8 | Dark | Down | 69.5 | 128.3 | Up | 05:20:01 - 05:46:21 | 6794 |
| Ellensburg | 05:33:13 | -52.8 | Dark | Down | 69.6 | 127.0 | Up | 05:20:03 - 05:46:23 | 6762 |
| Yakima | 05:33:14 | -53.0 | Dark | Down | 69.9 | 126.1 | Up | 05:20:04 - 05:46:24 | 6725 |
| Toppenish/White Swan | 05:33:14 | -53.2 | Dark | Down | 70.1 | 126.0 | Up | 05:20:04 - 05:46:24 | 6699 |
| Goldendale | 05:33:17 | -53.2 | Dark | Down | 70.2 | 124.0 | Up | 05:20:07 - 05:46:27 | 6661 |
| The Dalles | 05:33:18 | -53.1 | Dark | Down | 70.1 | 122.8 | Up | 05:20:08 - 05:46:28 | 6652 |
| Pasco | 05:33:10 | -54.0 | Dark | Down | 70.9 | 128.1 | Up | 05:20:00 - 05:46:20 | 6645 |
| PNWRO | 05:33:11 | -54.3 | Dark | Down | 71.1 | 128.0 | Up | 05:20:01 - 05:46:21 | 6614 |
| Maupin | 05:33:19 | -53.3 | Dark | Down | 70.4 | 122.0 | Up | 05:20:09 - 05:46:29 | 6608 |
| Sisters | 05:33:22 | -53.4 | Dark | Up | 70.5 | 119.0 | Up | 05:20:12 - 05:46:32 | 6542 |
| Redmond | 05:33:21 | -53.7 | Dark | Down | 70.8 | 119.7 | Up | 05:20:11 - 05:46:31 | 6526 |
| Bend | 05:33:22 | -53.7 | Dark | Down | 70.8 | 118.9 | Up | 05:20:12 - 05:46:32 | 6510 |
| Oregon Observatory | 05:33:23 | -53.6 | Dark | Up | 70.8 | 118.2 | Up | 05:20:13 - 05:46:33 | 6499 |
| La Pine/Gilchrist | 05:33:23 | -53.7 | Dark | Up | 70.9 | 117.6 | Up | 05:20:13 - 05:46:33 | 6481 |
| North Lake | 05:33:23 | -54.2 | Dark | Up | 71.5 | 117.5 | Up | 05:20:13 - 05:46:33 | 6418 |
| Chiloquin | 05:33:27 | -53.9 | Dark | Up | 71.1 | 114.2 | Up | 05:20:17 - 05:46:37 | 6388 |
| Paisley | 05:33:23 | -54.7 | Dark | Up | 71.9 | 116.6 | Up | 05:20:13 - 05:46:33 | 6353 |
| Klamath Falls | 05:33:28 | -54.1 | Dark | Up | 71.3 | 113.4 | Up | 05:20:18 - 05:46:38 | 6352 |
| Lakeview | 05:33:23 | -55.0 | Dark | Up | 72.3 | 115.5 | Up | 05:20:13 - 05:46:33 | 6297 |
| Cedarville | 05:33:24 | -55.4 | Dark | Up | 72.7 | 113.9 | Up | 05:20:14 - 05:46:34 | 6227 |
| Fall River/Burney | 05:33:29 | -54.7 | Dark | Up | 72.0 | 110.7 | Up | 05:20:19 - 05:46:39 | 6224 |
| Susanville | 05:33:28 | -55.5 | Dark | Up | 72.8 | 109.9 | Up | 05:20:18 - 05:46:38 | 6136 |
| Greenville | 05:33:30 | -55.4 | Dark | Up | 72.7 | 108.6 | Up | 05:20:20 - 05:46:40 | 6120 |
| Gimple | 05:33:30 | -55.4 | Dark | Up | 72.7 | 108.7 | Up | 05:20:20 - 05:46:40 | 6117 |
| Quincy | 05:33:30 | -55.4 | Dark | Up | 72.7 | 108.0 | Up | 05:20:20 - 05:46:40 | 6100 |
| Portola | 05:33:29 | -55.8 | Dark | Up | 73.1 | 108.3 | Up | 05:20:19 - 05:46:39 | 6070 |
| Reno | 05:33:27 | -56.4 | Dark | Up | 73.7 | 108.4 | Up | 05:20:17 - 05:46:37 | 6021 |
| Carson City | 05:33:28 | -56.5 | Dark | Up | 73.8 | 107.2 | Up | 05:20:18 - 05:46:38 | 5985 |
| Gardnerville | 05:33:29 | -56.6 | Dark | Up | 73.9 | 106.5 | Up | 05:20:19 - 05:46:39 | 5959 |
| Yerington | 05:33:27 | -57.0 | Dark | Up | 74.3 | 107.5 | Up | 05:20:17 - 05:46:37 | 5942 |
| Hawthorne | 05:33:25 | -57.6 | Dark | Up | 74.9 | 106.7 | Up | 05:20:15 - 05:46:35 | 5877 |
| Lee Vining | 05:33:29 | -57.4 | Dark | Up | 74.6 | 104.0 | Up | 05:20:19 - 05:46:39 | 5839 |
| Tonopah | 05:33:23 | -58.8 | Dark | Down | 76.0 | 107.0 | Up | 05:20:13 - 05:46:33 | 5780 |
| Bishop | 05:33:28 | -58.1 | Dark | Up | 75.3 | 102.8 | Up | 05:20:18 - 05:46:38 | 5753 |
| Beatty | 05:33:23 | -59.5 | Dark | Down | 76.7 | 103.1 | Up | 05:20:13 - 05:46:33 | 5647 |
| CPSLO | 05:33:40 | -56.9 | Dark | Up | 73.8 | 93.1 | Up | 05:20:30 - 05:46:50 | 5634 |
| Dunrhomin | 05:32:37 | -65.7 | Dark | Down | 81.9 | 154.9 | Up | 05:19:27 - 05:45:47 | 5629 |
| Indian Springs | 05:33:21 | -60.4 | Dark | Down | 77.6 | 103.2 | Up | 05:20:11 - 05:46:31 | 5576 |
| Henderson | 05:33:19 | -61.1 | Dark | Down | 78.3 | 101.7 | Up | 05:20:09 - 05:46:29 | 5497 |
| Wildwood | 05:33:36 | -58.8 | Dark | Up | 75.6 | 90.1 | Up | 05:20:26 - 05:46:46 | 5434 |
| Patrick | 05:33:16 | -62.2 | Dark | Down | 79.3 | 100.1 | Up | 05:20:06 - 05:46:26 | 5395 |
| Laughlin/Bullhead City | 05:33:19 | -61.7 | Dark | Down | 78.7 | 98.0 | Up | 05:20:09 - 05:46:29 | 5394 |
| Kingman/Dolan Springs | 05:33:17 | -62.1 | Dark | Down | 79.2 | 98.7 | Up | 05:20:07 - 05:46:27 | 5379 |
| Mohave Valley | 05:33:20 | -61.8 | Dark | Down | 78.8 | 96.7 | Up | 05:20:10 - 05:46:30 | 5366 |
| Idyllwild | 05:33:30 | -60.4 | Dark | Up | 77.1 | 89.6 | Up | 05:20:20 - 05:46:40 | 5326 |
| Lake Havasu City | 05:33:19 | -62.1 | Dark | Down | 79.0 | 94.9 | Up | 05:20:09 - 05:46:29 | 5317 |
| Parker | 05:33:20 | -62.2 | Dark | Down | 79.1 | 93.1 | Up | 05:20:10 - 05:46:30 | 5280 |
| Blythe | 05:33:22 | -62.1 | Dark | Down | 78.8 | 90.2 | Up | 05:20:12 - 05:46:32 | 5237 |
| Calipatria | 05:33:26 | -61.5 | Dark | Up | 78.1 | 87.4 | Up | 05:20:16 - 05:46:36 | 5221 |
| George/Scottsdale | 05:33:13 | -64.3 | Dark | Down | 81.1 | 92.6 | Up | 05:20:03 - 05:46:23 | 5152 |
| Yuma | 05:33:24 | -62.3 | Dark | Down | 78.8 | 85.5 | Up | 05:20:14 - 05:46:34 | 5144 |
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 15820, (2021/12/09 05:33UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:29 0.8 18.16 104 44Zet Per 03:54:07.9 +31:53:01 2.8 1.75 99 PPM 069071 04:04:43.1 +32:34:16 6.5 0.83 102 PPM 069037 04:02:36.2 +32:54:34 8.2 0.34 101 PPM 069017 04:01:30.3 +33:08:51 9.8 0.30 101 PPM 068992 04:00:16.6 +32:42:18 10.2 0.22 101 15820 04:01:00.7 +32:51:49 16.0 101 Positions are for J2000
Event circumstances last updated at 2021/12/05 01:59:26 UT
Marc W. Buie, Southwest Research Institute