Event between 12UE185 and star GA0880:03557875 with event index number of 1699553
Geocentric closest approach at 2020/12/03 10:02:57 UTC
J2000 position of star is 08:39:43.7 -01:59:00
Equinox of date position of star is 08:40:47.3 -02:03:30
Stellar brightness G=16.4,
use SENSEUP=128
Star is 35 degrees from the moon.
Moon is 91% illuminated.
TNO apparent brightness V=22.3
[RECON map]
TNO is 36.9 AU from the Sun
and 36.4 AU from the Earth.
The TNO is moving 12.6
km/sec on the sky relative to the star, or,
1.7 arcsec/hr.
The 1-sigma error in the time of the event is 343 seconds.
The 1-sigma cross-track error in the shadow position is
1891 km.
The sky-plane scale is
26431.6 km/arcsec.
The TNO has an absolute magnitude Hv=6.5
Diameter=306.2 km assuming a 5% albedo -- 24.3 sec chord
Diameter=125.0 km assuming a 30% albedo -- 9.9 sec chord
Dynamical classification is SCATEXTD
Star training set for 12UE185, (2020/12/03 10:03UT) Object RA Dec mag sep mel Regulus 10:09:29.1 +11:51:51 1.3 26.07 44 Alphard 09:28:36.9 -08:45:01 2.0 13.65 47 PPM 177501 08:35:05.1 -02:13:28 6.4 1.43 34 PPM 177535 08:39:16.1 -01:56:35 8.5 0.40 34 PPM 177559 08:42:07.7 -02:05:17 8.8 0.34 35 PPM 177545 08:40:49.1 -02:07:49 10.2 0.07 35 12UE185 08:40:47.3 -02:03:30 16.4 35 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
2.6 sigma about the mid-time.
The median site spacing is 15.3 km
RECON observability=1.0 and success probability=17.0%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Victoria | 10:02:46 | -54.6 | Dark | Up | 33.2 | 143.4 | Up | 09:47:46 - 10:17:46 | 1779 |
| Clarence Fulton | 10:02:18 | -51.5 | Dark | Up | 33.2 | 148.5 | Up | 09:47:18 - 10:17:18 | 1756 |
| Peachland | 10:02:24 | -52.0 | Dark | Up | 33.5 | 147.8 | Up | 09:47:24 - 10:17:24 | 1744 |
| Kelowna | 10:02:22 | -51.8 | Dark | Up | 33.5 | 148.2 | Up | 09:47:22 - 10:17:22 | 1741 |
| Summerland | 10:02:24 | -52.0 | Dark | Up | 33.7 | 147.9 | Up | 09:47:24 - 10:17:24 | 1735 |
| Penticton | 10:02:23 | -52.0 | Dark | Up | 33.8 | 148.0 | Up | 09:47:23 - 10:17:23 | 1728 |
| Oliver | 10:02:25 | -52.2 | Dark | Up | 34.1 | 147.8 | Up | 09:47:25 - 10:17:25 | 1712 |
| Anarchist Mountain Observatory | 10:02:25 | -52.2 | Dark | Up | 34.3 | 148.0 | Up | 09:47:25 - 10:17:25 | 1699 |
| Tonasket | 10:02:27 | -52.4 | Dark | Up | 34.5 | 147.8 | Up | 09:47:27 - 10:17:27 | 1685 |
| Okanogan | 10:02:29 | -52.6 | Dark | Up | 34.7 | 147.5 | Up | 09:47:29 - 10:17:29 | 1672 |
| Brewster | 10:02:32 | -52.9 | Dark | Up | 34.9 | 147.2 | Up | 09:47:32 - 10:17:32 | 1664 |
| Manson/Chelan | 10:02:34 | -53.2 | Dark | Up | 34.9 | 146.7 | Up | 09:47:34 - 10:17:34 | 1664 |
| Entiat | 10:02:36 | -53.4 | Dark | Up | 35.1 | 146.6 | Up | 09:47:36 - 10:17:36 | 1655 |
| Wenatchee | 10:02:38 | -53.6 | Dark | Up | 35.3 | 146.4 | Up | 09:47:38 - 10:17:38 | 1645 |
| Ellensburg | 10:02:41 | -53.9 | Dark | Up | 35.6 | 146.0 | Up | 09:47:41 - 10:17:41 | 1630 |
| Yakima | 10:02:43 | -54.1 | Dark | Up | 35.9 | 145.8 | Up | 09:47:43 - 10:17:43 | 1609 |
| Toppenish/White Swan | 10:02:41 | -54.1 | Dark | Up | 36.1 | 145.9 | Up | 09:47:41 - 10:17:41 | 1593 |
| Goldendale | 10:02:48 | -54.7 | Dark | Up | 36.4 | 145.2 | Up | 09:47:48 - 10:17:48 | 1576 |
| The Dalles | 10:02:50 | -55.0 | Dark | Up | 36.5 | 144.7 | Up | 09:47:50 - 10:17:50 | 1574 |
| Pasco | 10:02:37 | -53.4 | Dark | Up | 36.7 | 147.3 | Up | 09:47:37 - 10:17:37 | 1552 |
| Maupin | 10:02:52 | -55.1 | Dark | Up | 36.9 | 144.6 | Up | 09:47:52 - 10:17:52 | 1549 |
| PNWRO | 10:02:36 | -53.4 | Dark | Up | 37.0 | 147.4 | Up | 09:47:36 - 10:17:36 | 1533 |
| Sisters | 10:02:59 | -55.9 | Dark | Up | 37.4 | 143.7 | Up | 09:47:59 - 10:17:59 | 1516 |
| Redmond | 10:02:58 | -55.6 | Dark | Up | 37.6 | 144.2 | Up | 09:47:58 - 10:17:58 | 1503 |
| Bend | 10:03:00 | -55.8 | Dark | Up | 37.7 | 143.9 | Up | 09:48:00 - 10:18:00 | 1495 |
| Oregon Observatory | 10:03:01 | -56.0 | Dark | Up | 37.8 | 143.7 | Up | 09:48:01 - 10:18:01 | 1490 |
| La Pine/Gilchrist | 10:03:02 | -56.1 | Dark | Up | 37.9 | 143.5 | Up | 09:48:02 - 10:18:02 | 1480 |
| North Lake | 10:03:01 | -55.9 | Dark | Up | 38.5 | 144.0 | Up | 09:48:01 - 10:18:01 | 1438 |
| Klamath Falls | 10:03:11 | -56.9 | Dark | Up | 39.0 | 142.6 | Up | 09:48:11 - 10:18:11 | 1405 |
| Paisley | 10:03:02 | -55.9 | Dark | Up | 39.1 | 144.2 | Up | 09:48:02 - 10:18:02 | 1396 |
| Lakeview | 10:03:03 | -56.0 | Dark | Up | 39.6 | 144.2 | Up | 09:48:03 - 10:18:03 | 1361 |
| Fall River/Burney | 10:03:15 | -57.2 | Dark | Up | 40.1 | 142.4 | Up | 09:48:15 - 10:18:15 | 1324 |
| Cedarville | 10:03:06 | -56.2 | Dark | Up | 40.2 | 144.1 | Up | 09:48:06 - 10:18:06 | 1317 |
| Susanville | 10:03:14 | -57.0 | Dark | Up | 40.9 | 143.0 | Up | 09:48:14 - 10:18:14 | 1264 |
| Greenville | 10:03:17 | -57.3 | Dark | Up | 41.0 | 142.5 | Up | 09:48:17 - 10:18:17 | 1256 |
| Gimple | 10:03:17 | -57.2 | Dark | Up | 41.1 | 142.6 | Up | 09:48:17 - 10:18:17 | 1253 |
| Quincy | 10:03:18 | -57.3 | Dark | Up | 41.2 | 142.4 | Up | 09:48:18 - 10:18:18 | 1244 |
| Portola | 10:03:16 | -57.1 | Dark | Up | 41.5 | 142.9 | Up | 09:48:16 - 10:18:16 | 1222 |
| Reno | 10:03:14 | -56.7 | Dark | Up | 42.0 | 143.5 | Up | 09:48:14 - 10:18:14 | 1185 |
| Carson City | 10:03:16 | -56.8 | Dark | Up | 42.3 | 143.3 | Up | 09:48:16 - 10:18:16 | 1162 |
| Gardnerville | 10:03:16 | -56.9 | Dark | Up | 42.5 | 143.3 | Up | 09:48:16 - 10:18:16 | 1145 |
| Yerington | 10:03:13 | -56.4 | Dark | Up | 42.8 | 144.0 | Up | 09:48:13 - 10:18:13 | 1130 |
| Hawthorne | 10:03:12 | -56.2 | Dark | Up | 43.4 | 144.4 | Up | 09:48:12 - 10:18:12 | 1083 |
| Lee Vining | 10:03:18 | -56.7 | Dark | Up | 43.6 | 143.5 | Up | 09:48:18 - 10:18:18 | 1062 |
| Tonopah | 10:03:06 | -55.3 | Dark | Up | 44.4 | 145.8 | Up | 09:48:06 - 10:18:06 | 1008 |
| Bishop | 10:03:17 | -56.3 | Dark | Up | 44.4 | 144.0 | Up | 09:48:17 - 10:18:17 | 999 |
| CPSLO | 10:03:40 | -58.6 | Dark | Up | 45.0 | 140.1 | Up | 09:48:40 - 10:18:40 | 933 |
| Beatty | 10:03:09 | -55.2 | Dark | Up | 45.5 | 145.8 | Up | 09:48:09 - 10:18:09 | 915 |
| Indian Springs | 10:03:04 | -54.5 | Dark | Up | 46.3 | 147.0 | Up | 09:48:04 - 10:18:04 | 857 |
| Henderson | 10:03:03 | -54.1 | Dark | Up | 47.0 | 147.6 | Up | 09:48:03 - 10:18:03 | 797 |
| Wildwood | 10:03:34 | -57.3 | Dark | Up | 47.0 | 141.9 | Up | 09:48:34 - 10:18:34 | 781 |
| Searchlight/Boulder City | 10:03:05 | -54.1 | Dark | Up | 47.6 | 147.3 | Up | 09:48:05 - 10:18:05 | 755 |
| Niwot | 10:01:48 | -46.0 | Dark | Up | 46.5 | 162.5 | Up | 09:46:48 - 10:16:48 | 747 |
| SwRI | 10:01:49 | -46.1 | Dark | Up | 46.6 | 162.3 | Up | 09:46:49 - 10:16:49 | 743 |
| Laughlin/Bullhead City | 10:03:05 | -53.9 | Dark | Up | 48.0 | 147.6 | Up | 09:48:05 - 10:18:05 | 722 |
| Patrick | 10:02:59 | -53.3 | Dark | Up | 48.0 | 148.7 | Up | 09:47:59 - 10:17:59 | 715 |
| Kingman/Dolan Springs | 10:03:01 | -53.5 | Dark | Up | 48.2 | 148.3 | Up | 09:48:01 - 10:18:01 | 706 |
| Mohave Valley | 10:03:06 | -53.9 | Dark | Up | 48.2 | 147.5 | Up | 09:48:06 - 10:18:06 | 702 |
| Idyllwild | 10:03:23 | -55.8 | Dark | Up | 48.2 | 144.0 | Up | 09:48:23 - 10:18:23 | 693 |
| DCO | 10:02:56 | -52.8 | Dark | Up | 48.6 | 149.5 | Up | 09:47:56 - 10:17:56 | 669 |
| Lake Havasu City | 10:03:06 | -53.8 | Dark | Up | 48.6 | 147.6 | Up | 09:48:06 - 10:18:06 | 665 |
| Parker | 10:03:07 | -53.8 | Dark | Up | 48.9 | 147.4 | Up | 09:48:07 - 10:18:07 | 638 |
| Blythe | 10:03:12 | -54.2 | Dark | Up | 49.3 | 146.7 | Up | 09:48:12 - 10:18:12 | 610 |
| Calipatria | 10:03:19 | -55.0 | Dark | Up | 49.2 | 145.1 | Up | 09:48:19 - 10:18:19 | 607 |
| Yuma | 10:03:16 | -54.3 | Dark | Up | 50.0 | 146.0 | Up | 09:48:16 - 10:18:16 | 544 |
| George/Scottsdale | 10:02:54 | -51.9 | Dark | Up | 50.3 | 150.5 | Up | 09:47:54 - 10:17:54 | 522 |
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 12UE185, (2020/12/03 10:03UT) Object RA Dec mag sep mel Regulus 10:08:22.0 +11:58:02 1.3 26.07 44 Alphard 09:27:35.2 -08:39:30 2.0 13.65 47 PPM 177501 08:34:01.6 -02:09:06 6.4 1.43 34 PPM 177535 08:38:12.4 -01:52:08 8.5 0.40 34 PPM 177559 08:41:04.1 -02:00:46 8.8 0.34 35 PPM 177545 08:39:45.6 -02:03:19 10.2 0.07 35 12UE185 08:39:43.7 -01:59:00 16.4 35 Positions are for J2000
Event circumstances last updated at 2020/12/02 11:25:46 UT
Marc W. Buie, Southwest Research Institute