Event between 12YG12 and star GA0980:01184304 with event index number of 1561008
Geocentric closest approach at 2019/09/20 11:02:55 UTC
J2000 position of star is 05:59:39.5 +08:35:08
Equinox of date position of star is 06:00:43.4 +08:35:08
Stellar brightness G=15.6,
use SENSEUP=128
Star is 25 degrees from the moon.
Moon is 67% illuminated.
TNO apparent brightness V=22.3
[RECON map]
TNO is 34.0 AU from the Sun
and 34.0 AU from the Earth.
The TNO is moving 7.7
km/sec on the sky relative to the star, or,
1.1 arcsec/hr.
The 1-sigma error in the time of the event is 374 seconds.
The 1-sigma cross-track error in the shadow position is
4103 km.
The sky-plane scale is
24664.1 km/arcsec.
The TNO has an absolute magnitude Hv=6.8
Diameter=258.2 km assuming a 5% albedo -- 33.4 sec chord
Diameter=105.4 km assuming a 30% albedo -- 13.6 sec chord
Dynamical classification is 3:2E
Star training set for 12YG12, (2019/09/20 11:03UT) Object RA Dec mag sep mel Betelgeuse 05:56:14.4 +07:24:33 0.4 1.62 25 Bellatrix 05:26:11.4 +06:21:57 1.6 8.85 19 PPM 149523 05:51:07.9 +09:52:32 6.4 2.70 22 PPM 149724 06:00:32.2 +08:24:55 7.7 0.18 25 12YG12 06:00:44.1 +08:35:08 15.6 25 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
2.4 sigma about the mid-time.
The median site spacing is 21.6 km
RECON observability=1.0 and success probability=5.1%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Kelowna | 10:51:30 | -26.1 | Dark | Up | 33.1 | 119.8 | Up | 10:36:30 - 11:06:30 | 7963 |
| Summerland | 10:51:32 | -26.4 | Dark | Up | 33.1 | 119.3 | Up | 10:36:32 - 11:06:32 | 7925 |
| Penticton | 10:51:23 | -26.4 | Dark | Up | 33.1 | 119.4 | Up | 10:36:23 - 11:06:23 | 7922 |
| Okanagan Falls | 10:51:33 | -26.5 | Dark | Up | 33.2 | 119.3 | Up | 10:36:33 - 11:06:33 | 7902 |
| Oliver | 10:51:22 | -26.6 | Dark | Up | 33.3 | 119.1 | Up | 10:36:22 - 11:06:22 | 7886 |
| Anarchist Mountain Observatory | 10:51:26 | -26.6 | Dark | Up | 33.5 | 119.3 | Up | 10:36:26 - 11:06:26 | 7873 |
| Oroville | 10:51:32 | -26.7 | Dark | Up | 33.5 | 119.2 | Up | 10:36:32 - 11:06:32 | 7864 |
| Tonasket | 10:51:33 | -26.8 | Dark | Up | 33.6 | 119.0 | Up | 10:36:33 - 11:06:33 | 7840 |
| Okanogan | 10:51:32 | -27.1 | Dark | Up | 33.7 | 118.7 | Up | 10:36:32 - 11:06:32 | 7802 |
| Brewster | 10:51:26 | -27.4 | Dark | Up | 33.7 | 118.3 | Up | 10:36:26 - 11:06:26 | 7769 |
| Manson/Chelan | 10:51:23 | -27.7 | Dark | Up | 33.6 | 117.8 | Up | 10:36:23 - 11:06:23 | 7738 |
| Wenatchee | 10:51:27 | -28.1 | Dark | Up | 33.7 | 117.4 | Up | 10:36:27 - 11:06:27 | 7685 |
| Ellensburg | 10:51:23 | -28.5 | Dark | Up | 33.7 | 116.9 | Up | 10:36:23 - 11:06:23 | 7636 |
| Pasco | 10:51:36 | -28.1 | Dark | Up | 35.0 | 117.9 | Up | 10:36:36 - 11:06:36 | 7600 |
| Yakima | 10:51:22 | -28.7 | Dark | Up | 33.9 | 116.7 | Up | 10:36:22 - 11:06:22 | 7594 |
| PNWRO | 10:51:36 | -28.1 | Dark | Up | 35.2 | 117.9 | Up | 10:36:36 - 11:06:36 | 7581 |
| Toppenish/White Swan | 10:51:27 | -28.8 | Dark | Up | 34.1 | 116.7 | Up | 10:36:27 - 11:06:27 | 7576 |
| George/Umatilla | 10:51:33 | -28.4 | Dark | Up | 35.0 | 117.5 | Up | 10:36:33 - 11:06:33 | 7559 |
| Goldendale | 10:51:23 | -29.4 | Dark | Up | 34.1 | 116.0 | Up | 10:36:23 - 11:06:23 | 7508 |
| SwRI | 10:53:22 | -22.0 | Dark | Up | 47.1 | 128.1 | Up | 10:38:22 - 11:08:22 | 7480 |
| The Dalles | 10:51:23 | -29.7 | Dark | Up | 34.0 | 115.5 | Up | 10:36:23 - 11:06:23 | 7475 |
| Maupin | 10:51:23 | -29.9 | Dark | Up | 34.2 | 115.3 | Up | 10:36:23 - 11:06:23 | 7434 |
| Madras/Culver | 10:51:23 | -30.2 | Dark | Up | 34.4 | 115.0 | Up | 10:36:23 - 11:06:23 | 7377 |
| Redmond | 10:51:23 | -30.5 | Dark | Up | 34.5 | 114.7 | Up | 10:36:23 - 11:06:23 | 7338 |
| Sisters | 10:51:26 | -30.7 | Dark | Up | 34.3 | 114.4 | Up | 10:36:26 - 11:06:26 | 7329 |
| Bend | 10:51:26 | -30.7 | Dark | Up | 34.5 | 114.4 | Up | 10:36:26 - 11:06:26 | 7312 |
| Oregon Observatory | 10:51:29 | -30.9 | Dark | Up | 34.5 | 114.2 | Up | 10:36:29 - 11:06:29 | 7290 |
| La Pine/Gilchrist | 10:51:26 | -31.0 | Dark | Up | 34.6 | 114.0 | Up | 10:36:26 - 11:06:26 | 7267 |
| North Lake | 10:51:29 | -30.9 | Dark | Up | 35.2 | 114.3 | Up | 10:36:29 - 11:06:29 | 7239 |
| Paisley | 10:51:31 | -31.0 | Dark | Up | 35.6 | 114.3 | Up | 10:36:31 - 11:06:31 | 7193 |
| Lakeview | 10:51:33 | -31.2 | Dark | Up | 36.0 | 114.1 | Up | 10:36:33 - 11:06:33 | 7146 |
| Chiloquin | 10:51:22 | -31.9 | Dark | Up | 34.8 | 113.0 | Up | 10:36:22 - 11:06:22 | 7142 |
| Klamath Falls | 10:51:29 | -32.1 | Dark | Up | 35.0 | 112.9 | Up | 10:36:29 - 11:06:29 | 7109 |
| Tulelake | 10:51:26 | -32.1 | Dark | Up | 35.3 | 113.0 | Up | 10:36:26 - 11:06:26 | 7089 |
| Cedarville | 10:51:43 | -31.5 | Dark | Up | 36.4 | 113.9 | Up | 10:36:43 - 11:06:43 | 7084 |
| Fall River/Burney | 10:51:34 | -32.5 | Dark | Up | 35.7 | 112.5 | Up | 10:36:34 - 11:06:34 | 6997 |
| Susanville | 10:51:43 | -32.4 | Dark | Up | 36.5 | 112.7 | Up | 10:36:43 - 11:06:43 | 6953 |
| Gimple | 10:51:40 | -32.7 | Dark | Up | 36.4 | 112.3 | Up | 10:36:40 - 11:06:40 | 6918 |
| Greenville | 10:51:36 | -32.8 | Dark | Up | 36.4 | 112.2 | Up | 10:36:36 - 11:06:36 | 6916 |
| Portola | 10:51:37 | -32.6 | Dark | Up | 36.8 | 112.4 | Up | 10:36:37 - 11:06:37 | 6897 |
| Quincy | 10:51:37 | -32.9 | Dark | Up | 36.5 | 112.1 | Up | 10:36:37 - 11:06:37 | 6895 |
| Reno | 10:51:50 | -32.3 | Dark | Up | 37.4 | 112.9 | Up | 10:36:50 - 11:06:50 | 6889 |
| Yerington | 10:51:47 | -32.2 | Dark | Up | 38.1 | 113.0 | Up | 10:36:47 - 11:06:47 | 6853 |
| Carson City | 10:51:43 | -32.5 | Dark | Up | 37.6 | 112.6 | Up | 10:36:43 - 11:06:43 | 6853 |
| Gardnerville | 10:51:44 | -32.6 | Dark | Up | 37.7 | 112.5 | Up | 10:36:44 - 11:06:44 | 6829 |
| Hawthorne | 10:51:53 | -32.1 | Dark | Up | 38.7 | 113.2 | Up | 10:36:53 - 11:06:53 | 6823 |
| Tonopah | 10:52:08 | -31.4 | Dark | Up | 39.9 | 114.1 | Up | 10:37:08 - 11:07:08 | 6822 |
| Lee Vining | 10:51:51 | -32.7 | Dark | Up | 38.6 | 112.3 | Up | 10:36:51 - 11:06:51 | 6748 |
| Indian Springs | 10:52:20 | -31.0 | Dark | Up | 41.7 | 114.3 | Up | 10:37:20 - 11:07:20 | 6726 |
| Beatty | 10:52:11 | -31.6 | Dark | Up | 40.8 | 113.6 | Up | 10:37:11 - 11:07:11 | 6720 |
| Bishop | 10:52:04 | -32.5 | Dark | Up | 39.4 | 112.5 | Up | 10:37:04 - 11:07:04 | 6711 |
| Henderson | 10:52:22 | -30.7 | Dark | Up | 42.4 | 114.5 | Up | 10:37:22 - 11:07:22 | 6698 |
| Patrick | 10:52:40 | -30.2 | Dark | Up | 43.6 | 115.1 | Up | 10:37:40 - 11:07:40 | 6677 |
| Kingman/Dolan Springs | 10:52:33 | -30.4 | Dark | Up | 43.5 | 114.7 | Up | 10:37:33 - 11:07:33 | 6648 |
| Lone Pine | 10:52:04 | -32.7 | Dark | Up | 39.9 | 112.2 | Up | 10:37:04 - 11:07:04 | 6644 |
| Searchlight/Boulder City | 10:52:26 | -30.9 | Dark | Up | 42.7 | 114.1 | Up | 10:37:26 - 11:07:26 | 6642 |
| Laughlin/Bullhead City | 10:52:36 | -30.8 | Dark | Up | 43.2 | 114.2 | Up | 10:37:36 - 11:07:36 | 6625 |
| Mohave Valley | 10:52:38 | -30.9 | Dark | Up | 43.3 | 114.0 | Up | 10:37:38 - 11:07:38 | 6598 |
| Lake Havasu City | 10:52:40 | -30.9 | Dark | Up | 43.6 | 113.9 | Up | 10:37:40 - 11:07:40 | 6568 |
| Parker | 10:52:43 | -31.0 | Dark | Up | 43.8 | 113.6 | Up | 10:37:43 - 11:07:43 | 6533 |
| Blythe | 10:52:43 | -31.5 | Dark | Up | 43.8 | 112.9 | Up | 10:37:43 - 11:07:43 | 6469 |
| CPSLO | 10:51:51 | -35.2 | Dark | Up | 38.3 | 109.1 | Up | 10:36:51 - 11:06:51 | 6424 |
| Idyllwild | 10:52:25 | -33.0 | Dark | Up | 42.0 | 111.1 | Up | 10:37:25 - 11:07:25 | 6400 |
| Calipatria | 10:52:38 | -32.4 | Dark | Up | 43.2 | 111.6 | Up | 10:37:38 - 11:07:38 | 6383 |
| Yuma | 10:52:45 | -31.9 | Dark | Up | 44.1 | 112.0 | Up | 10:37:45 - 11:07:45 | 6374 |
| Wildwood | 10:52:11 | -34.3 | Dark | Up | 40.4 | 109.8 | Up | 10:37:11 - 11:07:11 | 6368 |
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 12YG12, (2019/09/20 11:03UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 1.62 25 Bellatrix 05:25:07.8 +06:20:58 1.6 8.85 19 PPM 149523 05:50:02.7 +09:52:15 6.4 2.70 22 PPM 149724 05:59:27.7 +08:24:55 7.7 0.18 25 12YG12 05:59:39.5 +08:35:08 15.6 25 Positions are for J2000
Event circumstances last updated at 2019/07/02 02:18:20 UT
Marc W. Buie, Southwest Research Institute