Event between (531141) 12FK84 and star GA0880:04430751 with event index number of 1600875
Geocentric closest approach at 2020/03/13 12:51:06 UTC
J2000 position of star is 15:12:29.2 -00:31:04
Equinox of date position of star is 15:13:29.3 -00:35:24
Stellar brightness G=16.5,
use SENSEUP=128
Star is 13 degrees from the moon.
Moon is 80% illuminated.
TNO apparent brightness V=22.5
[RECON map]
TNO is 38.9 AU from the Sun
and 38.3 AU from the Earth.
The TNO is moving 14.4
km/sec on the sky relative to the star, or,
1.9 arcsec/hr.
The 1-sigma error in the time of the event is 168 seconds.
The 1-sigma cross-track error in the shadow position is
2384 km.
The sky-plane scale is
27808.3 km/arcsec.
The TNO has an absolute magnitude Hv=6.5
Diameter=302.0 km assuming a 5% albedo -- 21.0 sec chord
Diameter=123.3 km assuming a 30% albedo -- 8.6 sec chord
Dynamical classification is SCATEXTD
Star training set for 531141, (2020/03/13 12:51UT) Object RA Dec mag sep mel Arcturus 14:16:35.1 +19:04:42 0.0 24.13 34 27Bet Lib 15:18:05.8 -09:27:22 2.6 8.94 5 4 Ser 15:16:50.9 +00:17:55 5.7 1.22 14 PPM 179498 15:11:00.7 -00:57:20 8.1 0.73 13 PPM 179503 15:13:39.7 -00:27:23 8.7 0.14 13 531141 15:13:31.5 -00:35:34 16.5 13 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 6.3 km
RECON observability=0.5 and success probability=3.1%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| SwRI | 12:52:20 | -5.1 | CT | Up | 40.4 | 223.1 | Up | 12:37:52 - 13:06:48 | 4873 |
| Kelowna | 12:54:02 | -13.6 | AT | Up | 37.4 | 202.4 | Up | 12:39:34 - 13:08:30 | 4512 |
| Penticton | 12:54:01 | -13.8 | AT | Up | 37.8 | 202.3 | Up | 12:39:33 - 13:08:29 | 4492 |
| Summerland | 12:54:01 | -13.9 | AT | Up | 37.7 | 202.1 | Up | 12:39:33 - 13:08:29 | 4488 |
| Okanagan Falls | 12:53:58 | -13.9 | AT | Up | 37.9 | 202.3 | Up | 12:39:30 - 13:08:26 | 4484 |
| Anarchist Mountain Observatory | 12:53:58 | -13.8 | AT | Up | 38.2 | 202.7 | Up | 12:39:30 - 13:08:26 | 4483 |
| Oliver | 12:53:58 | -13.9 | AT | Up | 38.1 | 202.4 | Up | 12:39:30 - 13:08:26 | 4479 |
| Oroville | 12:53:58 | -13.9 | AT | Up | 38.3 | 202.6 | Up | 12:39:30 - 13:08:26 | 4477 |
| Tonasket | 12:53:57 | -13.9 | AT | Up | 38.5 | 202.7 | Up | 12:39:29 - 13:08:25 | 4468 |
| Okanogan | 12:53:55 | -14.1 | AT | Up | 38.8 | 202.6 | Up | 12:39:27 - 13:08:23 | 4449 |
| Brewster | 12:53:52 | -14.3 | AT | Up | 39.2 | 202.4 | Up | 12:39:24 - 13:08:20 | 4430 |
| Manson/Chelan | 12:53:55 | -14.6 | AT | Up | 39.4 | 202.0 | Up | 12:39:27 - 13:08:23 | 4404 |
| PNWRO | 12:53:41 | -14.2 | AT | Up | 40.8 | 204.1 | Up | 12:39:13 - 13:08:09 | 4396 |
| Pasco | 12:53:42 | -14.3 | AT | Up | 40.7 | 203.8 | Up | 12:39:14 - 13:08:10 | 4394 |
| Wenatchee | 12:53:54 | -14.8 | AT | Up | 39.9 | 201.9 | Up | 12:39:26 - 13:08:22 | 4377 |
| George/Umatilla | 12:53:43 | -14.5 | AT | Up | 41.0 | 203.6 | Up | 12:39:15 - 13:08:11 | 4370 |
| Ellensburg | 12:53:52 | -15.1 | AT | Up | 40.4 | 201.8 | Up | 12:39:24 - 13:08:20 | 4351 |
| Toppenish/White Swan | 12:53:49 | -15.1 | AT | Up | 40.9 | 202.1 | Up | 12:39:21 - 13:08:17 | 4334 |
| Yakima | 12:53:48 | -15.2 | AT | Up | 40.7 | 201.9 | Up | 12:39:20 - 13:08:16 | 4334 |
| Goldendale | 12:53:46 | -15.5 | AT | Up | 41.5 | 201.8 | Up | 12:39:18 - 13:08:14 | 4290 |
| The Dalles | 12:53:48 | -15.8 | AT | Up | 41.8 | 201.4 | Up | 12:39:20 - 13:08:16 | 4262 |
| Maupin | 12:53:44 | -15.8 | AT | Up | 42.2 | 201.6 | Up | 12:39:16 - 13:08:12 | 4251 |
| Madras/Culver | 12:53:44 | -16.0 | AT | Up | 42.7 | 201.8 | Up | 12:39:16 - 13:08:12 | 4226 |
| Patrick | 12:52:27 | -12.2 | AT | Up | 48.3 | 215.5 | Up | 12:37:59 - 13:06:55 | 4215 |
| Redmond | 12:53:41 | -16.1 | AT | Up | 43.1 | 201.8 | Up | 12:39:13 - 13:08:09 | 4208 |
| Kingman/Dolan Springs | 12:52:25 | -12.3 | AT | Up | 48.6 | 215.4 | Up | 12:37:57 - 13:06:53 | 4193 |
| Bend | 12:53:40 | -16.3 | AT | Up | 43.3 | 201.7 | Up | 12:39:12 - 13:08:08 | 4191 |
| Sisters | 12:53:42 | -16.4 | AT | Up | 43.1 | 201.3 | Up | 12:39:14 - 13:08:10 | 4188 |
| Henderson | 12:52:33 | -13.0 | AT | Up | 48.3 | 213.7 | Up | 12:38:05 - 13:07:01 | 4181 |
| North Lake | 12:53:35 | -16.2 | AT | Up | 44.0 | 202.5 | Up | 12:39:07 - 13:08:03 | 4178 |
| Oregon Observatory | 12:53:41 | -16.4 | AT | Up | 43.5 | 201.6 | Up | 12:39:13 - 13:08:09 | 4177 |
| Paisley | 12:53:32 | -16.0 | AT | Up | 44.4 | 203.2 | Up | 12:39:04 - 13:08:00 | 4174 |
| Indian Springs | 12:52:39 | -13.5 | AT | Up | 48.1 | 212.4 | Up | 12:38:11 - 13:07:07 | 4166 |
| La Pine/Gilchrist | 12:53:38 | -16.5 | AT | Up | 43.7 | 201.5 | Up | 12:39:10 - 13:08:06 | 4165 |
| Laughlin/Bullhead City | 12:52:27 | -12.8 | AT | Up | 48.8 | 214.7 | Up | 12:37:59 - 13:06:55 | 4162 |
| Lakeview | 12:53:28 | -16.0 | AT | Up | 44.8 | 203.6 | Up | 12:39:00 - 13:07:56 | 4162 |
| Searchlight/Boulder City | 12:52:29 | -13.0 | AT | Up | 48.7 | 214.1 | Up | 12:38:01 - 13:06:57 | 4157 |
| Mohave Valley | 12:52:27 | -12.8 | AT | Up | 49.0 | 214.9 | Up | 12:37:59 - 13:06:55 | 4149 |
| Tonopah | 12:52:55 | -14.4 | AT | Up | 47.4 | 209.6 | Up | 12:38:27 - 13:07:23 | 4149 |
| Lake Havasu City | 12:52:22 | -12.6 | AT | Up | 49.2 | 215.5 | Up | 12:37:54 - 13:06:50 | 4144 |
| Cedarville | 12:53:25 | -16.0 | AT | Up | 45.3 | 204.1 | Up | 12:38:57 - 13:07:53 | 4142 |
| Parker | 12:52:22 | -12.6 | AT | Up | 49.5 | 215.8 | Up | 12:37:54 - 13:06:50 | 4128 |
| Beatty | 12:52:47 | -14.2 | AT | Up | 48.3 | 210.8 | Up | 12:38:19 - 13:07:15 | 4119 |
| Chiloquin | 12:53:37 | -17.0 | AT | Up | 44.8 | 201.5 | Up | 12:39:09 - 13:08:05 | 4096 |
| Hawthorne | 12:53:03 | -15.4 | AT | Up | 47.5 | 207.4 | Up | 12:38:35 - 13:07:31 | 4090 |
| Tulelake | 12:53:30 | -16.8 | AT | Up | 45.3 | 202.2 | Up | 12:39:02 - 13:07:58 | 4089 |
| Klamath Falls | 12:53:34 | -17.0 | AT | Up | 45.1 | 201.7 | Up | 12:39:06 - 13:08:02 | 4085 |
| Blythe | 12:52:19 | -13.0 | AT | Up | 50.1 | 215.7 | Up | 12:37:51 - 13:06:47 | 4084 |
| Yerington | 12:53:06 | -15.8 | AT | Up | 47.3 | 206.5 | Up | 12:38:38 - 13:07:34 | 4081 |
| Reno | 12:53:12 | -16.1 | AT | Up | 47.0 | 205.4 | Up | 12:38:44 - 13:07:40 | 4070 |
| Susanville | 12:53:20 | -16.6 | AT | Up | 46.5 | 203.9 | Up | 12:38:52 - 13:07:48 | 4064 |
| Carson City | 12:53:11 | -16.2 | AT | Up | 47.3 | 205.6 | Up | 12:38:43 - 13:07:39 | 4054 |
| Fall River/Burney | 12:53:25 | -17.0 | AT | Up | 46.1 | 202.6 | Up | 12:38:57 - 13:07:53 | 4052 |
| Bishop | 12:52:57 | -15.4 | AT | Up | 48.5 | 208.3 | Up | 12:38:29 - 13:07:25 | 4047 |
| Portola | 12:53:17 | -16.6 | AT | Up | 47.0 | 204.4 | Up | 12:38:49 - 13:07:45 | 4046 |
| Gardnerville | 12:53:09 | -16.2 | AT | Up | 47.6 | 205.7 | Up | 12:38:41 - 13:07:37 | 4045 |
| Gimple | 12:53:20 | -16.8 | AT | Up | 46.8 | 203.7 | Up | 12:38:52 - 13:07:48 | 4039 |
| Yuma | 12:52:16 | -13.1 | AT | Up | 50.9 | 216.3 | Up | 12:37:48 - 13:06:44 | 4035 |
| Greenville | 12:53:20 | -16.9 | AT | Up | 46.8 | 203.6 | Up | 12:38:52 - 13:07:48 | 4034 |
| Lee Vining | 12:53:02 | -15.9 | AT | Up | 48.2 | 207.0 | Up | 12:38:34 - 13:07:30 | 4034 |
| Lone Pine | 12:52:50 | -15.3 | AT | Up | 49.0 | 209.2 | Up | 12:38:22 - 13:07:18 | 4029 |
| Quincy | 12:53:19 | -16.9 | AT | Up | 47.0 | 203.7 | Up | 12:38:51 - 13:07:47 | 4025 |
| Calipatria | 12:52:20 | -13.8 | AT | Up | 51.0 | 214.8 | Up | 12:37:52 - 13:06:48 | 4003 |
| Idyllwild | 12:52:29 | -14.7 | AT | Up | 51.0 | 212.7 | Up | 12:38:01 - 13:06:57 | 3964 |
| Wildwood | 12:52:38 | -16.1 | AT | Up | 51.5 | 209.8 | Up | 12:38:10 - 13:07:06 | 3868 |
| CPSLO | 12:52:55 | -17.6 | AT | Up | 51.2 | 206.2 | Up | 12:38:27 - 13:07:23 | 3808 |
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 531141, (2020/03/13 12:51UT) Object RA Dec mag sep mel Arcturus 14:15:38.2 +19:10:18 0.0 24.13 34 27Bet Lib 15:17:00.3 -09:22:59 2.6 8.94 5 4 Ser 15:15:48.9 +00:22:20 5.7 1.22 14 PPM 179498 15:09:58.2 -00:52:48 8.1 0.73 13 PPM 179503 15:12:37.5 -00:22:54 8.7 0.14 13 531141 15:12:29.2 -00:31:04 16.5 13 Positions are for J2000
Event circumstances last updated at 2019/07/02 02:32:55 UT
Marc W. Buie, Southwest Research Institute