Event between 05TN74 and star GA1020:00233938 with event index number of 1959183
Geocentric closest approach at 2021/12/30 05:50:16 UTC
J2000 position of star is 02:34:41.0 +13:34:36
Equinox of date position of star is 02:35:52.8 +13:40:18
Stellar brightness G=16.9,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 171 degrees from the moon.
Moon is 17% illuminated.
TNO apparent brightness V=22.7
[RECON map]
TNO is 32.1 AU from the Sun
and 31.6 AU from the Earth.
The TNO is moving 10.2
km/sec on the sky relative to the star, or,
1.6 arcsec/hr.
The 1-sigma error in the time of the event is 268 seconds.
The 1-sigma cross-track error in the shadow position is
1490 km.
The sky-plane scale is
22900.7 km/arcsec.
The TNO has an absolute magnitude Hv=7.5
Diameter=187.1 km assuming a 5% albedo -- 18.3 sec chord
Diameter=76.4 km assuming a 30% albedo -- 7.5 sec chord
Dynamical classification is 5:3EE
Star training set for 05TN74, (2021/12/30 05:52UT) Object RA Dec mag sep mel Aldebaran 04:37:11.1 +16:33:06 0.8 29.39 159 Menkar 03:03:25.9 +04:10:29 2.5 11.68 167 31 Ari 02:37:50.1 +12:32:31 6.1 1.23 171 PPM 118367 02:37:13.5 +13:51:00 7.6 0.37 172 PPM 118355 02:36:27.2 +13:45:51 9.7 0.17 171 05TN74 02:35:53.1 +13:40:20 16.9 171 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
3.4 sigma about the mid-time.
The median site spacing is 24.9 km
RECON observability=1.0 and success probability=25.3%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Sleaford | 05:44:31 | -57.1 | Dark | Down | 39.8 | 235.1 | Up | 05:29:31 - 05:59:31 | 2727 |
| Kamloops | 05:45:50 | -51.7 | Dark | Down | 47.2 | 219.4 | Up | 05:30:50 - 06:00:50 | 2688 |
| Kelowna | 05:45:43 | -52.6 | Dark | Down | 47.5 | 221.1 | Up | 05:30:43 - 06:00:43 | 2603 |
| Peachland | 05:45:44 | -52.5 | Dark | Down | 47.7 | 220.8 | Up | 05:30:44 - 06:00:44 | 2595 |
| Summerland | 05:45:44 | -52.6 | Dark | Down | 47.7 | 221.0 | Up | 05:30:44 - 06:00:44 | 2580 |
| Penticton | 05:45:43 | -52.7 | Dark | Down | 47.7 | 221.2 | Up | 05:30:43 - 06:00:43 | 2573 |
| Oliver | 05:45:43 | -52.9 | Dark | Down | 48.0 | 221.4 | Up | 05:30:43 - 06:00:43 | 2539 |
| Anarchist Mountain Observatory | 05:45:41 | -53.1 | Dark | Down | 48.1 | 221.8 | Up | 05:30:41 - 06:00:41 | 2522 |
| Victoria | 05:46:07 | -51.1 | Dark | Down | 50.1 | 216.9 | Up | 05:31:07 - 06:01:07 | 2516 |
| Tonasket | 05:45:42 | -53.2 | Dark | Down | 48.3 | 222.0 | Up | 05:30:42 - 06:00:42 | 2493 |
| Okanogan | 05:45:42 | -53.3 | Dark | Down | 48.6 | 222.0 | Up | 05:30:42 - 06:00:42 | 2462 |
| Brewster | 05:45:43 | -53.3 | Dark | Down | 48.9 | 222.0 | Up | 05:30:43 - 06:00:43 | 2438 |
| Manson/Chelan | 05:45:45 | -53.2 | Dark | Down | 49.2 | 221.6 | Up | 05:30:45 - 06:00:45 | 2421 |
| Wenatchee | 05:45:45 | -53.3 | Dark | Down | 49.7 | 221.8 | Up | 05:30:45 - 06:00:45 | 2377 |
| Ellensburg | 05:45:47 | -53.4 | Dark | Down | 50.1 | 221.8 | Up | 05:30:47 - 06:00:47 | 2339 |
| Yakima | 05:45:47 | -53.6 | Dark | Down | 50.4 | 222.1 | Up | 05:30:47 - 06:00:47 | 2300 |
| Toppenish/White Swan | 05:45:45 | -53.8 | Dark | Down | 50.5 | 222.5 | Up | 05:30:45 - 06:00:45 | 2277 |
| Pasco | 05:45:36 | -54.6 | Dark | Down | 50.0 | 224.3 | Up | 05:30:36 - 06:00:36 | 2252 |
| Goldendale | 05:45:47 | -53.8 | Dark | Down | 51.1 | 222.4 | Up | 05:30:47 - 06:00:47 | 2227 |
| PNWRO | 05:45:35 | -54.9 | Dark | Down | 50.0 | 224.8 | Up | 05:30:35 - 06:00:35 | 2226 |
| The Dalles | 05:45:49 | -53.7 | Dark | Down | 51.4 | 222.1 | Up | 05:30:49 - 06:00:49 | 2209 |
| Maupin | 05:45:49 | -53.9 | Dark | Down | 51.7 | 222.6 | Up | 05:30:49 - 06:00:49 | 2167 |
| Sisters | 05:45:51 | -54.0 | Dark | Down | 52.6 | 222.7 | Up | 05:30:51 - 06:00:51 | 2085 |
| Redmond | 05:45:49 | -54.2 | Dark | Down | 52.4 | 223.3 | Up | 05:30:49 - 06:00:49 | 2078 |
| Bend | 05:45:49 | -54.2 | Dark | Down | 52.6 | 223.3 | Up | 05:30:49 - 06:00:49 | 2059 |
| Oregon Observatory | 05:45:50 | -54.2 | Dark | Down | 52.8 | 223.3 | Up | 05:30:50 - 06:00:50 | 2043 |
| La Pine/Gilchrist | 05:45:50 | -54.3 | Dark | Down | 53.0 | 223.4 | Up | 05:30:50 - 06:00:50 | 2023 |
| North Lake | 05:45:46 | -54.8 | Dark | Down | 53.0 | 224.6 | Up | 05:30:46 - 06:00:46 | 1973 |
| Chiloquin | 05:45:52 | -54.5 | Dark | Down | 54.0 | 223.9 | Up | 05:30:52 - 06:00:52 | 1916 |
| Paisley | 05:45:43 | -55.3 | Dark | Down | 53.2 | 225.6 | Up | 05:30:43 - 06:00:43 | 1914 |
| Klamath Falls | 05:45:51 | -54.6 | Dark | Down | 54.2 | 224.4 | Up | 05:30:51 - 06:00:51 | 1881 |
| Lakeview | 05:45:41 | -55.6 | Dark | Down | 53.5 | 226.3 | Up | 05:30:41 - 06:00:41 | 1861 |
| Cedarville | 05:45:40 | -56.0 | Dark | Down | 53.8 | 227.2 | Up | 05:30:40 - 06:00:40 | 1792 |
| Fall River/Burney | 05:45:48 | -55.3 | Dark | Down | 54.8 | 226.0 | Up | 05:30:48 - 06:00:48 | 1757 |
| Susanville | 05:45:43 | -56.0 | Dark | Down | 54.8 | 227.7 | Up | 05:30:43 - 06:00:43 | 1684 |
| Greenville | 05:45:45 | -55.9 | Dark | Down | 55.2 | 227.6 | Up | 05:30:45 - 06:00:45 | 1659 |
| Gimple | 05:45:44 | -56.0 | Dark | Down | 55.1 | 227.7 | Up | 05:30:44 - 06:00:44 | 1658 |
| Quincy | 05:45:44 | -56.0 | Dark | Down | 55.3 | 227.8 | Up | 05:30:44 - 06:00:44 | 1638 |
| Portola | 05:45:41 | -56.4 | Dark | Down | 55.1 | 228.6 | Up | 05:30:41 - 06:00:41 | 1620 |
| Reno | 05:45:36 | -56.9 | Dark | Down | 54.9 | 229.7 | Up | 05:30:36 - 06:00:36 | 1585 |
| Carson City | 05:45:36 | -57.1 | Dark | Down | 55.2 | 230.2 | Up | 05:30:36 - 06:00:36 | 1548 |
| Dunrhomin | 05:43:57 | -66.1 | Dark | Down | 45.3 | 245.2 | Up | 05:28:57 - 05:58:57 | 1547 |
| Gardnerville | 05:45:35 | -57.2 | Dark | Down | 55.3 | 230.5 | Up | 05:30:35 - 06:00:35 | 1522 |
| Yerington | 05:45:31 | -57.6 | Dark | Down | 54.9 | 231.2 | Up | 05:30:31 - 06:00:31 | 1521 |
| Hawthorne | 05:45:27 | -58.1 | Dark | Down | 54.9 | 232.4 | Up | 05:30:27 - 06:00:27 | 1467 |
| Lee Vining | 05:45:31 | -57.9 | Dark | Down | 55.5 | 232.4 | Up | 05:30:31 - 06:00:31 | 1414 |
| Tonopah | 05:45:16 | -59.3 | Dark | Down | 54.3 | 234.7 | Up | 05:30:16 - 06:00:16 | 1404 |
| Bishop | 05:45:24 | -58.6 | Dark | Down | 55.4 | 234.0 | Up | 05:30:24 - 06:00:24 | 1344 |
| Beatty | 05:45:13 | -60.0 | Dark | Down | 54.7 | 236.5 | Up | 05:30:13 - 06:00:13 | 1278 |
| Indian Springs | 05:45:04 | -60.9 | Dark | Down | 54.1 | 238.2 | Up | 05:30:04 - 06:00:04 | 1233 |
| Henderson | 05:44:59 | -61.6 | Dark | Down | 53.9 | 239.6 | Up | 05:29:59 - 05:59:59 | 1170 |
| CPSLO | 05:45:41 | -57.5 | Dark | Down | 58.1 | 233.6 | Up | 05:30:41 - 06:00:41 | 1153 |
| Patrick | 05:44:50 | -62.6 | Dark | Down | 53.5 | 241.6 | Up | 05:29:50 - 05:59:50 | 1093 |
| Laughlin/Bullhead City | 05:44:55 | -62.1 | Dark | Down | 54.1 | 241.1 | Up | 05:29:55 - 05:59:55 | 1074 |
| Kingman/Dolan Springs | 05:44:51 | -62.5 | Dark | Down | 53.7 | 241.6 | Up | 05:29:51 - 05:59:51 | 1071 |
| Mohave Valley | 05:44:55 | -62.2 | Dark | Down | 54.2 | 241.4 | Up | 05:29:55 - 05:59:55 | 1045 |
| Wildwood | 05:45:25 | -59.3 | Dark | Down | 57.4 | 237.8 | Up | 05:30:25 - 06:00:25 | 1001 |
| Lake Havasu City | 05:44:53 | -62.5 | Dark | Down | 54.2 | 242.2 | Up | 05:29:53 - 05:59:53 | 1000 |
| Parker | 05:44:53 | -62.7 | Dark | Down | 54.4 | 242.6 | Up | 05:29:53 - 05:59:53 | 962 |
| Idyllwild | 05:45:11 | -60.9 | Dark | Down | 56.3 | 240.5 | Up | 05:30:11 - 06:00:11 | 942 |
| Blythe | 05:44:54 | -62.6 | Dark | Down | 54.8 | 243.0 | Up | 05:29:54 - 05:59:54 | 909 |
| George/Scottsdale | 05:44:34 | -64.7 | Dark | Down | 52.8 | 245.6 | Up | 05:29:34 - 05:59:34 | 895 |
| Calipatria | 05:45:01 | -61.9 | Dark | Down | 55.7 | 242.6 | Up | 05:30:01 - 06:00:01 | 865 |
| Yuma | 05:44:55 | -62.8 | Dark | Down | 55.3 | 244.1 | Up | 05:29:55 - 05:59:55 | 810 |
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 05TN74, (2021/12/30 05:52UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:29 0.8 29.39 159 Menkar 03:02:16.8 +04:05:21 2.5 11.68 167 31 Ari 02:36:38.3 +12:26:50 6.1 1.23 171 PPM 118367 02:36:01.3 +13:45:18 7.6 0.37 172 PPM 118355 02:35:15.1 +13:40:08 9.7 0.17 171 05TN74 02:34:41.0 +13:34:36 16.9 171 Positions are for J2000
Event circumstances last updated at 2021/11/26 00:02:07 UT
Marc W. Buie, Southwest Research Institute