Event between (308460) 05SC278 and star GA1000:00168531 with event index number of 2185883
Geocentric closest approach at 2021/10/10 07:16:10 UTC
J2000 position of star is 01:54:45.7 +11:50:32
Equinox of date position of star is 01:55:55.6 +11:56:55
Stellar brightness G=14.1,
use SENSEUP=64 with the MallinCam and and exposure
time of 1 seconds with the QHY174 camera.
Star is 141 degrees from the moon.
Moon is 20% illuminated.
TNO apparent brightness V=22.5
[RECON map]
TNO is 33.2 AU from the Sun
and 32.2 AU from the Earth.
The TNO is moving 23.8
km/sec on the sky relative to the star, or,
3.7 arcsec/hr.
The 1-sigma error in the time of the event is 76 seconds.
The 1-sigma cross-track error in the shadow position is
1414 km.
The sky-plane scale is
23375.1 km/arcsec.
The TNO has an absolute magnitude Hv=7.3
Diameter=208.9 km assuming a 5% albedo -- 8.8 sec chord
Diameter=85.3 km assuming a 30% albedo -- 3.6 sec chord
Dynamical classification is 5:4E
Star training set for 308460, (2021/10/10 07:16UT) Object RA Dec mag sep mel Aldebaran 04:37:10.4 +16:33:05 0.8 39.28 174 6Bet Ari 01:55:50.8 +20:54:49 2.6 8.97 144 PPM 117850 02:00:36.0 +12:23:58 6.1 1.23 142 PPM 117770 01:55:34.4 +11:30:32 8.3 0.45 141 PPM 117787 01:56:49.4 +11:54:12 8.7 0.22 141 308460 01:55:55.6 +11:56:55 14.1 142 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 20.9 km
RECON observability=1.0 and success probability=0.9%
| 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 | 07:16:09 | -46.1 | Dark | Down | 48.3 | 150.1 | Up | 07:09:18 - 07:23:00 | 6228 |
| Victoria | 07:16:24 | -47.2 | Dark | Down | 48.3 | 143.4 | Up | 07:09:33 - 07:23:15 | 6220 |
| Peachland | 07:16:12 | -46.6 | Dark | Down | 48.6 | 149.1 | Up | 07:09:21 - 07:23:03 | 6205 |
| Kelowna | 07:16:11 | -46.5 | Dark | Down | 48.6 | 149.6 | Up | 07:09:20 - 07:23:02 | 6204 |
| Summerland | 07:16:12 | -46.7 | Dark | Down | 48.7 | 149.2 | Up | 07:09:21 - 07:23:03 | 6192 |
| Penticton | 07:16:12 | -46.8 | Dark | Down | 48.8 | 149.3 | Up | 07:09:21 - 07:23:03 | 6184 |
| Oliver | 07:16:12 | -47.1 | Dark | Down | 49.1 | 149.1 | Up | 07:09:21 - 07:23:03 | 6158 |
| Anarchist Mountain Observatory | 07:16:12 | -47.3 | Dark | Down | 49.3 | 149.3 | Up | 07:09:21 - 07:23:03 | 6141 |
| Tonasket | 07:16:13 | -47.6 | Dark | Down | 49.6 | 149.0 | Up | 07:09:22 - 07:23:04 | 6120 |
| Okanogan | 07:16:14 | -47.9 | Dark | Down | 49.8 | 148.6 | Up | 07:09:23 - 07:23:05 | 6099 |
| Brewster | 07:16:15 | -48.2 | Dark | Down | 50.0 | 148.1 | Up | 07:09:24 - 07:23:06 | 6085 |
| Manson/Chelan | 07:16:17 | -48.3 | Dark | Down | 50.0 | 147.5 | Up | 07:09:26 - 07:23:08 | 6080 |
| Wenatchee | 07:16:19 | -48.8 | Dark | Down | 50.4 | 147.0 | Up | 07:09:28 - 07:23:10 | 6050 |
| Ellensburg | 07:16:20 | -49.1 | Dark | Down | 50.6 | 146.4 | Up | 07:09:29 - 07:23:11 | 6026 |
| Yakima | 07:16:21 | -49.5 | Dark | Down | 51.0 | 146.1 | Up | 07:09:30 - 07:23:12 | 5996 |
| Toppenish/White Swan | 07:16:22 | -49.8 | Dark | Down | 51.2 | 146.2 | Up | 07:09:31 - 07:23:13 | 5974 |
| Goldendale | 07:16:24 | -50.3 | Dark | Down | 51.5 | 145.2 | Up | 07:09:33 - 07:23:15 | 5945 |
| The Dalles | 07:16:25 | -50.4 | Dark | Down | 51.5 | 144.5 | Up | 07:09:34 - 07:23:16 | 5939 |
| Pasco | 07:16:18 | -50.1 | Dark | Down | 51.8 | 147.9 | Up | 07:09:27 - 07:23:09 | 5927 |
| Maupin | 07:16:26 | -50.8 | Dark | Down | 51.9 | 144.3 | Up | 07:09:35 - 07:23:17 | 5904 |
| PNWRO | 07:16:18 | -50.3 | Dark | Down | 52.1 | 148.1 | Up | 07:09:27 - 07:23:09 | 5902 |
| Sisters | 07:16:30 | -51.6 | Dark | Down | 52.4 | 143.0 | Up | 07:09:39 - 07:23:21 | 5852 |
| Redmond | 07:16:29 | -51.7 | Dark | Down | 52.6 | 143.5 | Up | 07:09:38 - 07:23:20 | 5838 |
| Bend | 07:16:30 | -51.9 | Dark | Down | 52.7 | 143.2 | Up | 07:09:39 - 07:23:21 | 5825 |
| Oregon Observatory | 07:16:30 | -52.0 | Dark | Down | 52.8 | 142.9 | Up | 07:09:39 - 07:23:21 | 5816 |
| La Pine/Gilchrist | 07:16:31 | -52.2 | Dark | Down | 53.0 | 142.6 | Up | 07:09:40 - 07:23:22 | 5802 |
| North Lake | 07:16:30 | -52.8 | Dark | Down | 53.6 | 143.1 | Up | 07:09:39 - 07:23:21 | 5749 |
| Chiloquin | 07:16:35 | -53.2 | Dark | Down | 53.7 | 141.2 | Up | 07:09:44 - 07:23:26 | 5726 |
| Klamath Falls | 07:16:35 | -53.6 | Dark | Down | 54.0 | 141.0 | Up | 07:09:44 - 07:23:26 | 5696 |
| Paisley | 07:16:31 | -53.3 | Dark | Down | 54.2 | 143.2 | Up | 07:09:40 - 07:23:22 | 5694 |
| Lakeview | 07:16:31 | -53.9 | Dark | Down | 54.7 | 143.1 | Up | 07:09:40 - 07:23:22 | 5647 |
| Fall River/Burney | 07:16:37 | -54.8 | Dark | Down | 55.1 | 140.5 | Up | 07:09:46 - 07:23:28 | 5589 |
| Cedarville | 07:16:32 | -54.5 | Dark | Down | 55.3 | 142.8 | Up | 07:09:41 - 07:23:23 | 5589 |
| Susanville | 07:16:36 | -55.5 | Dark | Down | 55.9 | 141.1 | Up | 07:09:45 - 07:23:27 | 5513 |
| Greenville | 07:16:38 | -55.8 | Dark | Down | 56.0 | 140.4 | Up | 07:09:47 - 07:23:29 | 5500 |
| Gimple | 07:16:38 | -55.8 | Dark | Down | 56.0 | 140.5 | Up | 07:09:47 - 07:23:29 | 5497 |
| Quincy | 07:16:38 | -55.9 | Dark | Down | 56.2 | 140.2 | Up | 07:09:47 - 07:23:29 | 5483 |
| Portola | 07:16:38 | -56.2 | Dark | Down | 56.5 | 140.8 | Up | 07:09:47 - 07:23:29 | 5457 |
| Reno | 07:16:36 | -56.5 | Dark | Down | 57.0 | 141.6 | Up | 07:09:45 - 07:23:27 | 5414 |
| Carson City | 07:16:37 | -56.9 | Dark | Down | 57.3 | 141.2 | Up | 07:09:46 - 07:23:28 | 5383 |
| Gardnerville | 07:16:37 | -57.1 | Dark | Down | 57.5 | 141.1 | Up | 07:09:46 - 07:23:28 | 5361 |
| Yerington | 07:16:35 | -57.2 | Dark | Down | 57.8 | 142.1 | Up | 07:09:44 - 07:23:26 | 5346 |
| Hawthorne | 07:16:35 | -57.7 | Dark | Down | 58.4 | 142.4 | Up | 07:09:44 - 07:23:26 | 5289 |
| Lee Vining | 07:16:37 | -58.2 | Dark | Down | 58.6 | 141.1 | Up | 07:09:46 - 07:23:28 | 5257 |
| Tonopah | 07:16:31 | -58.4 | Dark | Down | 59.4 | 144.3 | Up | 07:09:40 - 07:23:22 | 5202 |
| Bishop | 07:16:36 | -58.9 | Dark | Down | 59.4 | 141.7 | Up | 07:09:45 - 07:23:27 | 5181 |
| Beatty | 07:16:32 | -59.6 | Dark | Down | 60.6 | 143.9 | Up | 07:09:41 - 07:23:23 | 5085 |
| CPSLO | 07:16:49 | -60.5 | Dark | Down | 59.8 | 135.7 | Up | 07:09:58 - 07:23:40 | 5080 |
| Indian Springs | 07:16:29 | -60.0 | Dark | Down | 61.3 | 145.5 | Up | 07:09:38 - 07:23:20 | 5020 |
| Dunrhomin | 07:15:48 | -55.9 | Dark | Down | 61.1 | 168.2 | Up | 07:08:57 - 07:22:39 | 5009 |
| Henderson | 07:16:29 | -60.6 | Dark | Down | 62.1 | 146.2 | Up | 07:09:38 - 07:23:20 | 4949 |
| Wildwood | 07:16:45 | -62.1 | Dark | Down | 61.8 | 137.6 | Up | 07:09:54 - 07:23:36 | 4901 |
| Laughlin/Bullhead City | 07:16:29 | -61.5 | Dark | Down | 63.0 | 146.0 | Up | 07:09:38 - 07:23:20 | 4857 |
| Patrick | 07:16:26 | -61.3 | Dark | Down | 63.1 | 147.6 | Up | 07:09:35 - 07:23:17 | 4855 |
| Kingman/Dolan Springs | 07:16:27 | -61.5 | Dark | Down | 63.2 | 147.0 | Up | 07:09:36 - 07:23:18 | 4841 |
| Mohave Valley | 07:16:29 | -61.8 | Dark | Down | 63.2 | 145.8 | Up | 07:09:38 - 07:23:20 | 4832 |
| Idyllwild | 07:16:39 | -62.7 | Dark | Down | 63.1 | 140.4 | Up | 07:09:48 - 07:23:30 | 4803 |
| Lake Havasu City | 07:16:30 | -62.2 | Dark | Down | 63.7 | 145.8 | Up | 07:09:39 - 07:23:21 | 4787 |
| Parker | 07:16:30 | -62.6 | Dark | Down | 64.0 | 145.4 | Up | 07:09:39 - 07:23:21 | 4754 |
| Blythe | 07:16:32 | -63.1 | Dark | Down | 64.3 | 144.3 | Up | 07:09:41 - 07:23:23 | 4717 |
| Calipatria | 07:16:36 | -63.5 | Dark | Down | 64.2 | 141.9 | Up | 07:09:45 - 07:23:27 | 4705 |
| Yuma | 07:16:34 | -64.0 | Dark | Down | 65.0 | 143.0 | Up | 07:09:43 - 07:23:25 | 4634 |
| George/Scottsdale | 07:16:23 | -63.0 | Dark | Down | 65.4 | 149.9 | Up | 07:09:32 - 07:23:14 | 4631 |
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 308460, (2021/10/10 07:16UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:29 0.8 39.28 174 6Bet Ari 01:54:38.5 +20:48:26 2.6 8.97 144 PPM 117850 01:59:25.9 +12:17:40 6.1 1.23 142 PPM 117770 01:54:24.6 +11:24:10 8.3 0.45 141 PPM 117787 01:55:39.5 +11:47:51 8.7 0.22 141 308460 01:54:45.7 +11:50:32 14.1 141 Positions are for J2000
Event circumstances last updated at 2021/10/10 00:58:56 UT
Marc W. Buie, Southwest Research Institute