Event between 20YR3 and star GA1220:02351455 with event index number of 2179011
Geocentric closest approach at 2021/11/05 05:27:45 UTC
J2000 position of star is 05:57:58.9 +32:22:37
Equinox of date position of star is 05:59:24.3 +32:22:40
Stellar brightness G=16.0,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 137 degrees from the moon.
Moon is 0% illuminated.
TNO apparent brightness V=21.9
[RECON map]
TNO is 17.5 AU from the Sun
and 16.8 AU from the Earth.
The TNO is moving 30.5
km/sec on the sky relative to the star, or,
9.0 arcsec/hr.
The 1-sigma error in the time of the event is 32 seconds.
The 1-sigma cross-track error in the shadow position is
694 km.
The sky-plane scale is
12201.2 km/arcsec.
The TNO has an absolute magnitude Hv=9.3
Diameter=85.1 km assuming a 5% albedo -- 2.8 sec chord
Diameter=34.7 km assuming a 30% albedo -- 1.1 sec chord
Dynamical classification is CENTAURR
Star training set for 20YR3, (2021/11/05 05:28UT) Object RA Dec mag sep mel Pollux 07:46:39.0 +27:58:18 1.1 23.53 114 Alnath 05:27:40.5 +28:37:26 1.6 7.80 145 PPM 071002 05:56:24.1 +31:42:10 5.9 0.93 138 PPM 071039 05:58:42.2 +32:41:41 8.1 0.35 137 PPM 071049 05:59:08.7 +32:29:11 11.1 0.12 137 20YR3 05:59:24.6 +32:22:40 16.0 137 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 22.7 km
RECON observability=1.0 and success probability=42.8%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Victoria | 05:30:13 | -45.6 | Dark | Down | 26.3 | 70.0 | Low | 05:27:01 - 05:33:24 | 1814 |
| Clarence Fulton | 05:30:07 | -46.6 | Dark | Down | 29.4 | 73.5 | Low | 05:26:55 - 05:33:18 | 1784 |
| Peachland | 05:30:08 | -46.7 | Dark | Down | 29.0 | 72.9 | Low | 05:26:57 - 05:33:20 | 1764 |
| Kelowna | 05:30:08 | -46.8 | Dark | Down | 29.2 | 73.2 | Low | 05:26:56 - 05:33:19 | 1761 |
| Summerland | 05:30:08 | -46.9 | Dark | Down | 29.0 | 72.9 | Low | 05:26:57 - 05:33:20 | 1750 |
| Penticton | 05:30:09 | -47.0 | Dark | Down | 29.0 | 73.0 | Low | 05:26:57 - 05:33:20 | 1741 |
| Oliver | 05:30:09 | -47.2 | Dark | Down | 28.9 | 72.8 | Low | 05:26:58 - 05:33:21 | 1715 |
| Anarchist Mountain Observatory | 05:30:10 | -47.4 | Dark | Down | 29.0 | 72.8 | Low | 05:26:58 - 05:33:21 | 1695 |
| Tonasket | 05:30:11 | -47.6 | Dark | Down | 28.9 | 72.6 | Low | 05:26:59 - 05:33:22 | 1674 |
| Okanogan | 05:30:12 | -47.7 | Dark | Down | 28.7 | 72.3 | Low | 05:27:00 - 05:33:23 | 1655 |
| Brewster | 05:30:12 | -47.8 | Dark | Down | 28.5 | 72.1 | Low | 05:27:01 - 05:33:24 | 1642 |
| Manson/Chelan | 05:30:13 | -47.7 | Dark | Down | 28.2 | 71.7 | Low | 05:27:01 - 05:33:24 | 1641 |
| Wenatchee | 05:30:14 | -47.9 | Dark | Down | 27.9 | 71.4 | Low | 05:27:03 - 05:33:26 | 1612 |
| Ellensburg | 05:30:15 | -48.0 | Dark | Down | 27.6 | 71.0 | Low | 05:27:04 - 05:33:27 | 1590 |
| Yakima | 05:30:16 | -48.3 | Dark | Down | 27.5 | 70.8 | Low | 05:27:05 - 05:33:28 | 1559 |
| Toppenish/White Swan | 05:30:17 | -48.5 | Dark | Down | 27.5 | 70.8 | Low | 05:27:05 - 05:33:28 | 1536 |
| Goldendale | 05:30:18 | -48.6 | Dark | Down | 27.1 | 70.3 | Low | 05:27:07 - 05:33:30 | 1511 |
| The Dalles | 05:30:19 | -48.5 | Dark | Down | 26.8 | 70.0 | Low | 05:27:07 - 05:33:30 | 1509 |
| Pasco | 05:30:16 | -49.3 | Dark | Down | 28.3 | 71.5 | Low | 05:27:05 - 05:33:28 | 1476 |
| Maupin | 05:30:20 | -48.8 | Dark | Down | 26.7 | 69.8 | Low | 05:27:08 - 05:33:31 | 1472 |
| PNWRO | 05:30:17 | -49.5 | Dark | Down | 28.4 | 71.5 | Low | 05:27:06 - 05:33:29 | 1448 |
| Sisters | 05:30:22 | -49.0 | Dark | Down | 26.1 | 69.2 | Low | 05:27:11 - 05:33:34 | 1425 |
| Redmond | 05:30:22 | -49.3 | Dark | Down | 26.3 | 69.4 | Low | 05:27:11 - 05:33:34 | 1406 |
| Bend | 05:30:23 | -49.3 | Dark | Down | 26.1 | 69.2 | Low | 05:27:11 - 05:33:34 | 1396 |
| Oregon Observatory | 05:30:23 | -49.3 | Dark | Down | 26.0 | 69.0 | Low | 05:27:12 - 05:33:35 | 1388 |
| La Pine/Gilchrist | 05:30:24 | -49.4 | Dark | Down | 25.9 | 68.9 | Low | 05:27:12 - 05:33:35 | 1374 |
| North Lake | 05:30:24 | -50.0 | Dark | Down | 26.1 | 69.1 | Low | 05:27:13 - 05:33:36 | 1315 |
| Chiloquin | 05:30:26 | -49.7 | Dark | Down | 25.2 | 68.2 | Low | 05:27:15 - 05:33:38 | 1302 |
| Klamath Falls | 05:30:27 | -50.0 | Dark | Down | 25.2 | 68.1 | Low | 05:27:16 - 05:33:39 | 1272 |
| Paisley | 05:30:26 | -50.5 | Dark | Down | 26.2 | 69.0 | Low | 05:27:14 - 05:33:37 | 1256 |
| Lakeview | 05:30:27 | -50.9 | Dark | Down | 26.1 | 68.9 | Low | 05:27:15 - 05:33:38 | 1207 |
| Fall River/Burney | 05:30:30 | -50.8 | Dark | Down | 25.0 | 67.8 | Low | 05:27:18 - 05:33:41 | 1161 |
| Cedarville | 05:30:28 | -51.4 | Dark | Down | 26.0 | 68.7 | Low | 05:27:16 - 05:33:39 | 1146 |
| Susanville | 05:30:31 | -51.6 | Dark | Down | 25.3 | 67.9 | Low | 05:27:19 - 05:33:42 | 1077 |
| Greenville | 05:30:31 | -51.6 | Dark | Down | 25.0 | 67.7 | Low | 05:27:20 - 05:33:43 | 1067 |
| Gimple | 05:30:31 | -51.6 | Dark | Down | 25.0 | 67.7 | Low | 05:27:20 - 05:33:43 | 1064 |
| Quincy | 05:30:32 | -51.7 | Dark | Down | 24.9 | 67.6 | Low | 05:27:20 - 05:33:43 | 1051 |
| Portola | 05:30:32 | -52.1 | Dark | Down | 25.2 | 67.8 | Low | 05:27:20 - 05:33:43 | 1019 |
| Reno | 05:30:32 | -52.6 | Dark | Down | 25.6 | 68.0 | Low | 05:27:20 - 05:33:43 | 968 |
| Carson City | 05:30:33 | -52.8 | Dark | Down | 25.4 | 67.8 | Low | 05:27:21 - 05:33:44 | 938 |
| Gardnerville | 05:30:33 | -53.0 | Dark | Down | 25.4 | 67.8 | Low | 05:27:22 - 05:33:45 | 915 |
| Yerington | 05:30:33 | -53.3 | Dark | Down | 25.8 | 68.1 | Low | 05:27:21 - 05:33:44 | 893 |
| Hawthorne | 05:30:33 | -53.9 | Dark | Down | 26.0 | 68.1 | Low | 05:27:22 - 05:33:45 | 830 |
| Lee Vining | 05:30:35 | -53.9 | Dark | Down | 25.5 | 67.6 | Low | 05:27:23 - 05:33:46 | 805 |
| Tonopah | 05:30:34 | -55.1 | Dark | Down | 26.9 | 68.6 | Low | 05:27:22 - 05:33:45 | 727 |
| Bishop | 05:30:36 | -54.7 | Dark | Down | 25.8 | 67.7 | Low | 05:27:24 - 05:33:47 | 721 |
| CPSLO | 05:30:41 | -54.0 | Dark | Down | 23.3 | 65.8 | Low | 05:27:29 - 05:33:52 | 650 |
| Beatty | 05:30:35 | -56.0 | Dark | Down | 26.8 | 68.2 | Low | 05:27:24 - 05:33:47 | 606 |
| Indian Springs | 05:30:35 | -57.0 | Dark | Down | 27.5 | 68.6 | Low | 05:27:24 - 05:33:47 | 529 |
| Henderson | 05:30:36 | -57.7 | Dark | Down | 27.8 | 68.6 | Low | 05:27:24 - 05:33:47 | 450 |
| Wildwood | 05:30:42 | -56.0 | Dark | Down | 24.4 | 66.2 | Low | 05:27:30 - 05:33:53 | 447 |
| Dunrhomin | 05:30:18 | -60.7 | Dark | Down | 36.4 | 75.7 | Up | 05:27:07 - 05:33:30 | 412 |
| Laughlin/Bullhead City | 05:30:37 | -58.5 | Dark | Down | 27.8 | 68.4 | Low | 05:27:26 - 05:33:49 | 354 |
| Patrick | 05:30:36 | -58.8 | Dark | Down | 28.5 | 68.8 | Low | 05:27:25 - 05:33:48 | 344 |
| Kingman/Dolan Springs | 05:30:37 | -58.8 | Dark | Down | 28.2 | 68.6 | Low | 05:27:25 - 05:33:48 | 333 |
| Mohave Valley | 05:30:37 | -58.6 | Dark | Down | 27.7 | 68.2 | Low | 05:27:26 - 05:33:49 | 329 |
| Idyllwild | 05:30:41 | -57.6 | Dark | Down | 25.7 | 66.8 | Low | 05:27:30 - 05:33:53 | 326 |
| Lake Havasu City | 05:30:38 | -59.0 | Dark | Down | 27.8 | 68.1 | Low | 05:27:27 - 05:33:50 | 282 |
| Parker | 05:30:39 | -59.2 | Dark | Down | 27.7 | 68.0 | Low | 05:27:27 - 05:33:50 | 249 |
| Blythe | 05:30:40 | -59.2 | Dark | Down | 27.2 | 67.6 | Low | 05:27:28 - 05:33:51 | 216 |
| Calipatria | 05:30:41 | -58.8 | Dark | Down | 26.3 | 67.0 | Low | 05:27:30 - 05:33:53 | 216 |
| Yuma | 05:30:41 | -59.6 | Dark | Down | 26.9 | 67.2 | Low | 05:27:30 - 05:33:53 | 134 |
| George/Scottsdale | 05:30:37 | -61.1 | Dark | Down | 29.4 | 68.7 | Low | 05:27:26 - 05:33:49 | 99 |
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 20YR3, (2021/11/05 05:28UT) Object RA Dec mag sep mel Pollux 07:45:17.9 +28:01:33 1.1 23.53 114 Alnath 05:26:17.6 +28:36:23 1.6 7.80 145 PPM 071002 05:54:58.9 +31:42:02 5.9 0.93 138 PPM 071039 05:57:16.3 +32:41:37 8.1 0.35 137 PPM 071049 05:57:43.0 +32:29:08 11.1 0.12 137 20YR3 05:57:58.9 +32:22:37 16.0 137 Positions are for J2000
Event circumstances last updated at 2021/10/10 00:59:54 UT
Marc W. Buie, Southwest Research Institute