Event between 09YG19 and star GA1120:01987019 with event index number of 1653783
Geocentric closest approach at 2027/01/10 04:04:51 UTC
J2000 position of star is 06:17:32.9 +22:56:16
Equinox of date position of star is 06:18:46.6 +22:55:44
Stellar brightness G=15.3,
use SENSEUP=128
Star is 139 degrees from the moon.
Moon is 5% illuminated.
TNO apparent brightness V=25.7
[RECON map]
TNO is 37.4 AU from the Sun
and 36.5 AU from the Earth.
The TNO is moving 23.8
km/sec on the sky relative to the star, or,
3.2 arcsec/hr.
The 1-sigma error in the time of the event is 227 seconds.
The 1-sigma cross-track error in the shadow position is
1441 km.
The sky-plane scale is
26439.0 km/arcsec.
The TNO has an absolute magnitude Hv=10.0
Diameter=346.7 km assuming a 5% albedo -- 2.5 sec chord
Diameter=141.6 km assuming a 30% albedo -- 1.0 sec chord
Dynamical classification is 5:2EEE
Star training set for 09YG19, (2027/01/10 04:05UT) Object RA Dec mag sep mel Betelgeuse 05:56:38.1 +07:24:35 0.4 16.44 132 Alhena 06:39:16.4 +16:22:26 1.9 8.08 144 7Eta Gem 06:16:30.6 +22:29:47 4.5 0.75 139 PPM 095769 06:21:01.1 +23:15:41 7.7 0.54 140 PPM 095732 06:19:38.5 +22:38:45 9.2 0.30 139 PPM 095715 06:19:09.3 +22:50:20 11.6 0.09 139 09YG19 06:19:11.2 +22:55:33 15.3 140 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
4.0 sigma about the mid-time.
The median site spacing is 23.8 km
RECON observability=1.0 and success probability=32.4%
| 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 | 04:06:56 | -36.1 | Dark | Down | 47.2 | 113.7 | Up | 03:51:56 - 04:21:56 | 1751 |
| Kelowna | 04:06:57 | -36.1 | Dark | Down | 47.3 | 113.1 | Up | 03:51:57 - 04:21:57 | 1717 |
| Peachland | 04:06:58 | -35.9 | Dark | Down | 47.1 | 112.7 | Up | 03:51:58 - 04:21:58 | 1711 |
| Summerland | 04:06:58 | -36.0 | Dark | Down | 47.3 | 112.7 | Up | 03:51:58 - 04:21:58 | 1696 |
| Penticton | 04:06:58 | -36.1 | Dark | Down | 47.3 | 112.7 | Up | 03:51:58 - 04:21:58 | 1688 |
| Victoria | 04:07:09 | -33.7 | Dark | Down | 45.4 | 107.9 | Up | 03:52:09 - 04:22:09 | 1659 |
| Oliver | 04:06:59 | -36.1 | Dark | Down | 47.5 | 112.4 | Up | 03:51:59 - 04:21:59 | 1655 |
| Anarchist Mountain Observatory | 04:06:59 | -36.3 | Dark | Down | 47.7 | 112.4 | Up | 03:51:59 - 04:21:59 | 1636 |
| Tonasket | 04:07:00 | -36.3 | Dark | Down | 47.7 | 112.0 | Up | 03:52:00 - 04:22:00 | 1607 |
| Okanogan | 04:07:00 | -36.2 | Dark | Down | 47.8 | 111.5 | Up | 03:52:00 - 04:22:00 | 1578 |
| Brewster | 04:07:02 | -36.1 | Dark | Down | 47.8 | 111.0 | Up | 03:52:02 - 04:22:02 | 1555 |
| Manson/Chelan | 04:07:03 | -35.9 | Dark | Down | 47.6 | 110.5 | Up | 03:52:03 - 04:22:03 | 1542 |
| Entiat | 04:07:04 | -35.9 | Dark | Down | 47.6 | 110.2 | Up | 03:52:04 - 04:22:04 | 1522 |
| Wenatchee | 04:07:05 | -35.9 | Dark | Down | 47.7 | 109.8 | Up | 03:52:05 - 04:22:05 | 1500 |
| Ellensburg | 04:07:06 | -35.8 | Dark | Down | 47.7 | 109.2 | Up | 03:52:06 - 04:22:06 | 1464 |
| Yakima | 04:07:07 | -35.8 | Dark | Down | 47.8 | 108.7 | Up | 03:52:07 - 04:22:07 | 1425 |
| Toppenish/White Swan | 04:07:07 | -35.9 | Dark | Down | 48.0 | 108.7 | Up | 03:52:07 - 04:22:07 | 1401 |
| Pasco | 04:07:04 | -36.8 | Dark | Down | 48.8 | 109.8 | Up | 03:52:04 - 04:22:04 | 1368 |
| Goldendale | 04:07:09 | -35.7 | Dark | Down | 47.9 | 107.7 | Up | 03:52:09 - 04:22:09 | 1355 |
| The Dalles | 04:07:10 | -35.4 | Dark | Down | 47.7 | 107.1 | Up | 03:52:10 - 04:22:10 | 1340 |
| PNWRO | 04:07:04 | -37.0 | Dark | Down | 49.1 | 109.7 | Up | 03:52:04 - 04:22:04 | 1340 |
| Maupin | 04:07:11 | -35.6 | Dark | Down | 47.9 | 106.8 | Up | 03:52:11 - 04:22:11 | 1298 |
| Sisters | 04:07:14 | -35.3 | Dark | Down | 47.8 | 105.4 | Up | 03:52:14 - 04:22:14 | 1221 |
| Redmond | 04:07:13 | -35.5 | Dark | Down | 48.1 | 105.7 | Up | 03:52:13 - 04:22:13 | 1211 |
| Bend | 04:07:14 | -35.5 | Dark | Down | 48.0 | 105.4 | Up | 03:52:14 - 04:22:14 | 1193 |
| Oregon Observatory | 04:07:14 | -35.4 | Dark | Down | 48.0 | 105.1 | Up | 03:52:14 - 04:22:14 | 1179 |
| La Pine/Gilchrist | 04:07:15 | -35.3 | Dark | Down | 48.0 | 104.8 | Up | 03:52:15 - 04:22:15 | 1160 |
| North Lake | 04:07:14 | -35.8 | Dark | Down | 48.5 | 104.9 | Up | 03:52:14 - 04:22:14 | 1106 |
| Paisley | 04:07:15 | -36.1 | Dark | Down | 48.9 | 104.6 | Up | 03:52:15 - 04:22:15 | 1044 |
| Klamath Falls | 04:07:19 | -35.2 | Dark | Down | 48.2 | 103.0 | Up | 03:52:19 - 04:22:19 | 1021 |
| Lakeview | 04:07:15 | -36.2 | Dark | Down | 49.2 | 104.2 | Up | 03:52:15 - 04:22:15 | 990 |
| Cedarville | 04:07:16 | -36.4 | Dark | Down | 49.5 | 103.6 | Up | 03:52:16 - 04:22:16 | 921 |
| Fall River/Burney | 04:07:20 | -35.5 | Dark | Down | 48.7 | 102.0 | Up | 03:52:20 - 04:22:20 | 896 |
| Susanville | 04:07:19 | -36.1 | Dark | Down | 49.4 | 101.9 | Up | 03:52:19 - 04:22:19 | 819 |
| Greenville | 04:07:21 | -35.9 | Dark | Down | 49.2 | 101.4 | Up | 03:52:21 - 04:22:21 | 796 |
| Gimple | 04:07:20 | -35.9 | Dark | Down | 49.3 | 101.4 | Up | 03:52:20 - 04:22:20 | 795 |
| Quincy | 04:07:21 | -35.9 | Dark | Down | 49.3 | 101.2 | Up | 03:52:21 - 04:22:21 | 776 |
| Portola | 04:07:20 | -36.2 | Dark | Down | 49.7 | 101.4 | Up | 03:52:20 - 04:22:20 | 754 |
| Reno | 04:07:19 | -36.7 | Dark | Down | 50.2 | 101.6 | Up | 03:52:19 - 04:22:19 | 714 |
| Carson City | 04:07:19 | -36.7 | Dark | Down | 50.3 | 101.2 | Up | 03:52:19 - 04:22:19 | 677 |
| Gardnerville | 04:07:20 | -36.8 | Dark | Down | 50.4 | 101.0 | Up | 03:52:20 - 04:22:20 | 652 |
| Yerington | 04:07:18 | -37.2 | Dark | Down | 50.8 | 101.5 | Up | 03:52:18 - 04:22:18 | 645 |
| Hawthorne | 04:07:17 | -37.7 | Dark | Down | 51.3 | 101.4 | Up | 03:52:17 - 04:22:17 | 588 |
| Niwot | 04:06:35 | -47.7 | Dark | Down | 60.5 | 117.0 | Up | 03:51:35 - 04:21:35 | 546 |
| Lee Vining | 04:07:19 | -37.3 | Dark | Down | 51.0 | 100.3 | Up | 03:52:19 - 04:22:19 | 539 |
| SwRI | 04:06:36 | -47.7 | Dark | Down | 60.5 | 116.7 | Up | 03:51:36 - 04:21:36 | 536 |
| Tonopah | 04:07:14 | -38.8 | Dark | Down | 52.5 | 101.9 | Up | 03:52:14 - 04:22:14 | 513 |
| Bishop | 04:07:18 | -37.8 | Dark | Down | 51.7 | 100.1 | Up | 03:52:18 - 04:22:18 | 463 |
| Beatty | 04:07:15 | -39.1 | Dark | Down | 53.1 | 100.8 | Up | 03:52:15 - 04:22:15 | 385 |
| Indian Springs | 04:07:12 | -40.0 | Dark | Down | 54.0 | 101.2 | Up | 03:52:12 - 04:22:12 | 331 |
| CPSLO | 04:07:28 | -36.0 | Dark | Down | 50.2 | 96.0 | Up | 03:52:28 - 04:22:28 | 295 |
| Henderson | 04:07:11 | -40.6 | Dark | Down | 54.6 | 101.1 | Up | 03:52:11 - 04:22:11 | 263 |
| Searchlight/Boulder City | 04:07:11 | -40.6 | Dark | Down | 54.8 | 100.3 | Up | 03:52:11 - 04:22:11 | 202 |
| Patrick | 04:07:08 | -41.5 | Dark | Down | 55.6 | 101.1 | Up | 03:52:08 - 04:22:08 | 177 |
| Laughlin/Bullhead City | 04:07:11 | -40.9 | Dark | Down | 55.1 | 100.2 | Up | 03:52:11 - 04:22:11 | 164 |
| Kingman/Dolan Springs | 04:07:09 | -41.3 | Dark | Down | 55.5 | 100.6 | Up | 03:52:09 - 04:22:09 | 157 |
| Mohave Valley | 04:07:11 | -40.9 | Dark | Down | 55.1 | 99.8 | Up | 03:52:11 - 04:22:11 | 135 |
| DCO | 04:07:06 | -42.0 | Dark | Down | 56.2 | 101.2 | Up | 03:52:06 - 04:22:06 | 133 |
| Wildwood | 04:07:24 | -37.6 | Dark | Down | 52.0 | 95.9 | Up | 03:52:24 - 04:22:24 | 127 |
| Lake Havasu City | 04:07:11 | -41.1 | Dark | Down | 55.4 | 99.4 | Up | 03:52:11 - 04:22:11 | 88 |
| Idyllwild | 04:07:19 | -39.1 | Dark | Down | 53.6 | 96.7 | Up | 03:52:19 - 04:22:19 | 52 |
| Parker | 04:07:11 | -41.1 | Dark | Down | 55.5 | 98.9 | Up | 03:52:11 - 04:22:11 | 51 |
| Blythe | 04:07:13 | -40.9 | Dark | Down | 55.3 | 98.0 | Up | 03:52:13 - 04:22:13 | 1 |
| Calipatria | 04:07:16 | -40.1 | Dark | Down | 54.6 | 96.6 | Up | 03:52:16 - 04:22:16 | -35 |
| George/Scottsdale | 04:07:04 | -43.1 | Dark | Down | 57.5 | 100.1 | Up | 03:52:04 - 04:22:04 | -36 |
| Yuma | 04:07:14 | -40.8 | Dark | Down | 55.4 | 96.6 | Up | 03:52:14 - 04:22:14 | -97 |
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 09YG19, (2027/01/10 04:05UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 16.44 132 Alhena 06:37:42.8 +16:23:57 1.9 8.08 144 7Eta Gem 06:14:52.6 +22:30:24 4.5 0.75 139 PPM 095769 06:19:22.5 +23:16:28 7.7 0.54 140 PPM 095732 06:18:00.3 +22:39:30 9.2 0.30 139 PPM 095715 06:17:31.0 +22:51:03 11.6 0.09 139 09YG19 06:17:32.9 +22:56:16 15.3 139 Positions are for J2000
Event circumstances last updated at 2020/04/04 21:30:00 UT
Marc W. Buie, Southwest Research Institute