Event between (281371) 08FC76 and star GA0920:02426229 with event index number of 2457132
Geocentric closest approach at 2021/12/11 06:59:01 UTC
J2000 position of star is 07:13:17.9 +02:06:24
Equinox of date position of star is 07:14:26.3 +02:04:05
Stellar brightness G=16.5,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 114 degrees from the moon.
Moon is 52% illuminated.
TNO apparent brightness V=20.5
[RECON map]
TNO is 12.8 AU from the Sun
and 12.0 AU from the Earth.
The TNO is moving 19.9
km/sec on the sky relative to the star, or,
8.2 arcsec/hr.
The 1-sigma error in the time of the event is 64 seconds.
The 1-sigma cross-track error in the shadow position is
823 km.
The sky-plane scale is
8711.4 km/arcsec.
The TNO has an absolute magnitude Hv=9.3
Diameter=83.2 km assuming a 5% albedo -- 4.2 sec chord
Diameter=34.0 km assuming a 30% albedo -- 1.7 sec chord
Dynamical classification is CENTAURR
Star training set for 281371, (2021/12/11 06:59UT) Object RA Dec mag sep mel Sirius 06:46:06.9 -16:44:51 -1.5 20.07 103 Alhena 06:38:58.8 +16:22:43 1.9 16.76 106 PPM 152385 07:20:31.2 +02:41:56 5.9 1.64 115 PPM 152289 07:17:44.9 +01:50:16 7.6 0.86 114 PPM 152153 07:13:51.3 +02:03:54 9.1 0.15 114 281371 07:14:26.4 +02:04:05 16.5 114 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 17.4 km
RECON observability=1.0 and success probability=0.0%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Kamloops | 07:00:10 | -60.4 | Dark | Up | 29.2 | 128.1 | Low | 06:54:21 - 07:05:58 | 6568 |
| Kelowna | 07:00:10 | -61.4 | Dark | Up | 30.2 | 128.6 | Up | 06:54:21 - 07:05:58 | 6509 |
| Peachland | 07:00:10 | -61.4 | Dark | Up | 30.1 | 128.3 | Up | 06:54:21 - 07:05:58 | 6508 |
| Victoria | 07:00:10 | -61.3 | Dark | Up | 28.9 | 124.1 | Low | 06:54:21 - 07:05:58 | 6505 |
| Summerland | 07:00:10 | -61.5 | Dark | Up | 30.2 | 128.3 | Up | 06:54:21 - 07:05:58 | 6498 |
| Penticton | 07:00:10 | -61.6 | Dark | Up | 30.3 | 128.4 | Up | 06:54:21 - 07:05:58 | 6493 |
| Oliver | 07:00:10 | -62.0 | Dark | Up | 30.6 | 128.2 | Up | 06:54:21 - 07:05:58 | 6473 |
| Anarchist Mountain Observatory | 07:00:10 | -62.2 | Dark | Up | 30.8 | 128.3 | Up | 06:54:21 - 07:05:58 | 6461 |
| Tonasket | 07:00:10 | -62.4 | Dark | Up | 30.9 | 128.1 | Up | 06:54:21 - 07:05:58 | 6444 |
| Okanogan | 07:00:10 | -62.7 | Dark | Up | 31.1 | 127.8 | Up | 06:54:21 - 07:05:58 | 6428 |
| Brewster | 07:00:10 | -62.9 | Dark | Up | 31.1 | 127.5 | Up | 06:54:21 - 07:05:58 | 6416 |
| Sleaford | 06:59:28 | -60.9 | Dark | Down | 34.4 | 143.8 | Up | 06:53:40 - 07:05:17 | 6412 |
| Manson/Chelan | 07:00:10 | -62.9 | Dark | Up | 31.0 | 127.0 | Up | 06:54:21 - 07:05:58 | 6411 |
| Wenatchee | 07:00:10 | -63.3 | Dark | Up | 31.2 | 126.6 | Up | 06:54:21 - 07:05:58 | 6388 |
| Ellensburg | 07:00:10 | -63.6 | Dark | Up | 31.4 | 126.2 | Up | 06:54:21 - 07:05:58 | 6369 |
| Yakima | 07:00:10 | -63.9 | Dark | Up | 31.6 | 126.0 | Up | 06:54:21 - 07:05:58 | 6346 |
| Toppenish/White Swan | 07:00:10 | -64.2 | Dark | Up | 31.8 | 126.0 | Up | 06:54:21 - 07:05:58 | 6331 |
| Goldendale | 07:00:10 | -64.5 | Dark | Up | 31.9 | 125.3 | Up | 06:54:21 - 07:05:58 | 6308 |
| The Dalles | 07:00:10 | -64.6 | Dark | Up | 31.8 | 124.9 | Up | 06:54:21 - 07:05:58 | 6303 |
| Pasco | 07:00:10 | -64.7 | Dark | Up | 32.6 | 127.2 | Up | 06:54:21 - 07:05:58 | 6299 |
| PNWRO | 07:00:10 | -65.0 | Dark | Up | 32.9 | 127.3 | Up | 06:54:21 - 07:05:58 | 6280 |
| Maupin | 07:00:34 | -65.0 | Dark | Up | 32.2 | 124.8 | Up | 06:54:46 - 07:06:23 | 6258 |
| Sisters | 07:00:40 | -65.5 | Dark | Up | 32.4 | 123.9 | Up | 06:54:51 - 07:06:28 | 6211 |
| Redmond | 07:00:38 | -65.7 | Dark | Up | 32.6 | 124.3 | Up | 06:54:49 - 07:06:26 | 6202 |
| Bend | 07:00:39 | -65.8 | Dark | Up | 32.7 | 124.0 | Up | 06:54:51 - 07:06:28 | 6191 |
| Oregon Observatory | 07:00:40 | -65.9 | Dark | Up | 32.7 | 123.8 | Up | 06:54:52 - 07:06:29 | 6182 |
| La Pine/Gilchrist | 07:00:41 | -66.1 | Dark | Up | 32.8 | 123.7 | Up | 06:54:52 - 07:06:29 | 6170 |
| North Lake | 07:00:41 | -66.7 | Dark | Up | 33.4 | 124.0 | Up | 06:54:52 - 07:06:29 | 6131 |
| Chiloquin | 07:00:46 | -66.8 | Dark | Up | 33.2 | 122.8 | Up | 06:54:57 - 07:06:34 | 6103 |
| Paisley | 07:00:42 | -67.3 | Dark | Up | 33.9 | 124.1 | Up | 06:54:53 - 07:06:30 | 6088 |
| Klamath Falls | 07:00:47 | -67.1 | Dark | Up | 33.4 | 122.6 | Up | 06:54:58 - 07:06:35 | 6079 |
| Lakeview | 07:00:43 | -67.8 | Dark | Up | 34.3 | 124.0 | Up | 06:54:55 - 07:06:32 | 6051 |
| Cedarville | 07:00:45 | -68.4 | Dark | Up | 34.8 | 123.8 | Up | 06:54:57 - 07:06:34 | 6003 |
| Fall River/Burney | 07:00:50 | -68.3 | Dark | Up | 34.3 | 122.3 | Up | 06:55:02 - 07:06:39 | 5991 |
| Susanville | 07:00:50 | -69.1 | Dark | Up | 35.1 | 122.7 | Up | 06:55:02 - 07:06:39 | 5934 |
| Greenville | 07:00:52 | -69.2 | Dark | Up | 35.1 | 122.2 | Up | 06:55:04 - 07:06:41 | 5920 |
| Gimple | 07:00:52 | -69.2 | Dark | Up | 35.1 | 122.3 | Up | 06:55:03 - 07:06:40 | 5918 |
| Quincy | 07:00:53 | -69.3 | Dark | Up | 35.2 | 122.1 | Up | 06:55:04 - 07:06:41 | 5906 |
| Portola | 07:00:52 | -69.7 | Dark | Up | 35.6 | 122.5 | Up | 06:55:03 - 07:06:40 | 5888 |
| Reno | 07:00:52 | -70.2 | Dark | Up | 36.1 | 122.9 | Up | 06:55:03 - 07:06:40 | 5857 |
| Carson City | 07:00:53 | -70.5 | Dark | Up | 36.3 | 122.7 | Up | 06:55:04 - 07:06:41 | 5831 |
| Gardnerville | 07:00:53 | -70.7 | Dark | Up | 36.5 | 122.6 | Up | 06:55:05 - 07:06:42 | 5813 |
| Yerington | 07:00:51 | -70.9 | Dark | Up | 36.9 | 123.2 | Up | 06:55:03 - 07:06:40 | 5805 |
| Hawthorne | 07:00:50 | -71.5 | Dark | Up | 37.5 | 123.4 | Up | 06:55:02 - 07:06:39 | 5761 |
| Lee Vining | 07:00:54 | -71.8 | Dark | Up | 37.5 | 122.6 | Up | 06:55:05 - 07:06:42 | 5729 |
| Tonopah | 07:00:48 | -72.6 | Dark | Up | 38.6 | 124.5 | Up | 06:55:00 - 07:06:37 | 5699 |
| Bishop | 07:00:55 | -72.6 | Dark | Up | 38.3 | 122.9 | Up | 06:55:06 - 07:06:43 | 5670 |
| Dunrhomin | 07:00:01 | -72.7 | Dark | Down | 44.1 | 138.8 | Up | 06:54:12 - 07:05:49 | 5615 |
| Beatty | 07:00:51 | -73.7 | Dark | Up | 39.6 | 124.2 | Up | 06:55:02 - 07:06:39 | 5603 |
| CPSLO | 07:01:08 | -72.9 | Dark | Up | 37.8 | 119.5 | Up | 06:55:20 - 07:06:57 | 5557 |
| Indian Springs | 07:00:48 | -74.5 | Dark | Up | 40.5 | 125.0 | Up | 06:54:59 - 07:06:36 | 5556 |
| Henderson | 07:00:48 | -75.2 | Dark | Up | 41.3 | 125.3 | Up | 06:54:59 - 07:06:36 | 5500 |
| Patrick | 07:00:46 | -76.2 | Dark | Up | 42.3 | 125.9 | Up | 06:54:57 - 07:06:34 | 5428 |
| Laughlin/Bullhead City | 07:00:49 | -76.1 | Dark | Up | 42.0 | 125.1 | Up | 06:55:00 - 07:06:37 | 5423 |
| Wildwood | 07:01:05 | -75.0 | Dark | Up | 39.9 | 120.5 | Up | 06:55:17 - 07:06:54 | 5422 |
| Kingman/Dolan Springs | 07:00:46 | -76.3 | Dark | Up | 42.4 | 125.6 | Up | 06:54:58 - 07:06:35 | 5414 |
| Mohave Valley | 07:00:50 | -76.4 | Dark | Up | 42.2 | 124.9 | Up | 06:55:01 - 07:06:38 | 5401 |
| Lake Havasu City | 07:00:50 | -76.8 | Dark | Up | 42.6 | 124.8 | Up | 06:55:02 - 07:06:39 | 5364 |
| Idyllwild | 07:01:01 | -76.3 | Dark | Up | 41.4 | 122.0 | Up | 06:55:12 - 07:06:49 | 5355 |
| Parker | 07:00:51 | -77.1 | Dark | Up | 42.8 | 124.6 | Up | 06:55:02 - 07:06:39 | 5335 |
| Blythe | 07:00:54 | -77.4 | Dark | Up | 42.9 | 123.9 | Up | 06:55:05 - 07:06:42 | 5300 |
| Calipatria | 07:00:58 | -77.4 | Dark | Up | 42.5 | 122.6 | Up | 06:55:10 - 07:06:47 | 5280 |
| George/Scottsdale | 07:00:43 | -78.4 | Dark | Up | 44.7 | 126.7 | Up | 06:54:55 - 07:06:32 | 5248 |
| Yuma | 07:00:56 | -78.2 | Dark | Up | 43.4 | 123.1 | Up | 06:55:08 - 07:06:45 | 5225 |
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 281371, (2021/12/11 06:59UT) Object RA Dec mag sep mel Sirius 06:45:08.0 -16:43:24 -1.5 20.07 103 Alhena 06:37:42.8 +16:23:57 1.9 16.76 106 PPM 152385 07:19:22.4 +02:44:26 5.9 1.64 115 PPM 152289 07:16:36.5 +01:52:41 7.6 0.86 114 PPM 152153 07:12:42.8 +02:06:12 9.1 0.15 114 281371 07:13:17.9 +02:06:24 16.5 114 Positions are for J2000
Event circumstances last updated at 2021/12/05 01:59:47 UT
Marc W. Buie, Southwest Research Institute