Event between (523700) 14GM54 and star GA1020:18259718 with event index number of 2090132
Geocentric closest approach at 2027/09/09 07:40:04 UTC
J2000 position of star is 20:35:19.0 +12:28:13
Equinox of date position of star is 20:36:24.1 +12:33:01
Stellar brightness G=16.0,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 52 degrees from the moon.
Moon is 65% illuminated.
TNO apparent brightness V=22.0
[RECON map]
TNO is 29.7 AU from the Sun
and 28.9 AU from the Earth.
The TNO is moving 24.4
km/sec on the sky relative to the star, or,
4.2 arcsec/hr.
The 1-sigma error in the time of the event is 101 seconds.
The 1-sigma cross-track error in the shadow position is
2643 km.
The sky-plane scale is
20984.1 km/arcsec.
The TNO has an absolute magnitude Hv=7.2
Diameter=229.1 km assuming a 5% albedo -- 9.1 sec chord
Diameter=93.5 km assuming a 30% albedo -- 3.7 sec chord
Dynamical classification is 3:2E+6:4II
Star training set for 523700, (2027/09/09 07:40UT) Object RA Dec mag sep mel Deneb 20:42:22.6 +45:22:50 1.3 32.84 79 Tarazed 19:47:34.5 +10:40:57 2.7 12.16 43 3Eta Del 20:35:15.6 +13:07:25 5.5 0.65 52 PPM 138706 20:38:18.0 +12:08:47 8.1 0.59 51 PPM 138647 20:36:35.3 +12:37:01 9.3 0.05 52 523700 20:36:37.8 +12:34:02 16.0 52 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 33.3 km
RECON observability=1.0 and success probability=15.1%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Kamloops | 07:37:02 | -33.8 | Dark | Down | 43.2 | 227.2 | Up | 07:28:09 - 07:45:55 | 4015 |
| Victoria | 07:37:11 | -35.6 | Dark | Down | 46.1 | 225.1 | Up | 07:28:18 - 07:46:04 | 3937 |
| Peachland | 07:37:02 | -34.7 | Dark | Down | 43.6 | 228.5 | Up | 07:28:09 - 07:45:55 | 3907 |
| Kelowna | 07:37:00 | -34.6 | Dark | Down | 43.3 | 228.8 | Up | 07:28:07 - 07:45:53 | 3906 |
| Summerland | 07:37:01 | -34.9 | Dark | Down | 43.6 | 228.8 | Up | 07:28:08 - 07:45:54 | 3889 |
| Penticton | 07:37:02 | -35.0 | Dark | Down | 43.6 | 228.9 | Up | 07:28:09 - 07:45:55 | 3879 |
| Oliver | 07:37:03 | -35.3 | Dark | Down | 43.8 | 229.2 | Up | 07:28:10 - 07:45:56 | 3846 |
| Anarchist Mountain Observatory | 07:37:01 | -35.5 | Dark | Down | 43.8 | 229.5 | Up | 07:28:08 - 07:45:54 | 3823 |
| Okanogan | 07:37:03 | -36.1 | Dark | Down | 44.4 | 229.8 | Up | 07:28:10 - 07:45:56 | 3771 |
| Brewster | 07:37:04 | -36.4 | Dark | Down | 44.6 | 229.7 | Up | 07:28:11 - 07:45:57 | 3753 |
| Manson/Chelan | 07:37:05 | -36.6 | Dark | Down | 45.0 | 229.5 | Up | 07:28:12 - 07:45:58 | 3748 |
| Wenatchee | 07:37:05 | -37.0 | Dark | Down | 45.4 | 229.6 | Up | 07:28:12 - 07:45:58 | 3711 |
| Sleaford | 07:36:33 | -32.1 | Dark | Down | 35.1 | 241.7 | Up | 07:27:40 - 07:45:26 | 3692 |
| Ellensburg | 07:37:07 | -37.4 | Dark | Down | 45.7 | 229.7 | Up | 07:28:14 - 07:46:00 | 3681 |
| Yakima | 07:37:08 | -37.8 | Dark | Down | 46.0 | 230.0 | Up | 07:28:15 - 07:46:01 | 3644 |
| Toppenish/White Swan | 07:37:08 | -38.0 | Dark | Down | 46.1 | 230.4 | Up | 07:28:15 - 07:46:01 | 3617 |
| The Dalles | 07:37:11 | -38.7 | Dark | Down | 47.0 | 230.1 | Up | 07:28:18 - 07:46:04 | 3577 |
| Maupin | 07:37:10 | -39.2 | Dark | Down | 47.2 | 230.6 | Up | 07:28:17 - 07:46:03 | 3533 |
| PNWRO | 07:37:04 | -38.5 | Dark | Down | 45.5 | 232.4 | Up | 07:28:11 - 07:45:57 | 3522 |
| Sisters | 07:37:13 | -40.0 | Dark | Down | 48.0 | 230.7 | Up | 07:28:20 - 07:46:06 | 3472 |
| Bend | 07:37:12 | -40.2 | Dark | Down | 48.0 | 231.2 | Up | 07:28:19 - 07:46:05 | 3439 |
| Oregon Observatory | 07:37:13 | -40.4 | Dark | Down | 48.2 | 231.2 | Up | 07:28:20 - 07:46:06 | 3428 |
| Chiloquin | 07:37:16 | -41.7 | Dark | Down | 49.2 | 231.9 | Up | 07:28:23 - 07:46:09 | 3324 |
| Klamath Falls | 07:37:16 | -42.0 | Dark | Down | 49.4 | 232.3 | Up | 07:28:23 - 07:46:09 | 3288 |
| Fall River/Burney | 07:37:18 | -43.2 | Dark | Down | 49.9 | 233.9 | Up | 07:28:25 - 07:46:11 | 3161 |
| Cedarville | 07:37:14 | -42.9 | Dark | Down | 48.9 | 234.9 | Up | 07:28:21 - 07:46:07 | 3152 |
| Greenville | 07:37:18 | -44.2 | Dark | Down | 50.1 | 235.3 | Up | 07:28:25 - 07:46:11 | 3056 |
| Gimple | 07:37:18 | -44.2 | Dark | Down | 50.1 | 235.4 | Up | 07:28:25 - 07:46:11 | 3052 |
| Quincy | 07:37:19 | -44.4 | Dark | Down | 50.2 | 235.5 | Up | 07:28:26 - 07:46:12 | 3037 |
| Portola | 07:37:18 | -44.5 | Dark | Down | 50.0 | 236.2 | Up | 07:28:25 - 07:46:11 | 3003 |
| Reno | 07:37:17 | -44.9 | Dark | Down | 49.7 | 237.2 | Up | 07:28:24 - 07:46:10 | 2949 |
| Carson City | 07:37:17 | -45.2 | Dark | Down | 49.9 | 237.6 | Up | 07:28:24 - 07:46:10 | 2914 |
| Gardnerville | 07:37:17 | -45.5 | Dark | Down | 50.0 | 237.9 | Up | 07:28:24 - 07:46:10 | 2888 |
| Yerington | 07:37:16 | -45.5 | Dark | Down | 49.6 | 238.5 | Up | 07:28:23 - 07:46:09 | 2867 |
| Hawthorne | 07:37:16 | -46.0 | Dark | Down | 49.5 | 239.5 | Up | 07:28:23 - 07:46:09 | 2799 |
| Lee Vining | 07:37:18 | -46.5 | Dark | Down | 50.1 | 239.6 | Up | 07:28:25 - 07:46:11 | 2767 |
| Bishop | 07:37:18 | -47.2 | Dark | Down | 49.9 | 241.0 | Up | 07:28:25 - 07:46:11 | 2677 |
| Beatty | 07:37:14 | -47.7 | Dark | Down | 49.0 | 243.2 | Up | 07:28:21 - 07:46:07 | 2560 |
| Dunrhomin | 07:36:43 | -43.5 | Dark | Down | 39.4 | 250.7 | Up | 07:27:50 - 07:45:36 | 2456 |
| CU-SBO | 07:36:44 | -43.8 | Dark | Down | 39.6 | 250.9 | Up | 07:27:51 - 07:45:37 | 2434 |
| Wildwood | 07:37:24 | -50.4 | Dark | Up | 51.5 | 244.4 | Up | 07:28:31 - 07:46:17 | 2374 |
| Laughlin/Bullhead City | 07:37:12 | -49.5 | Dark | Down | 48.1 | 247.1 | Up | 07:28:19 - 07:46:05 | 2297 |
| Patrick | 07:37:10 | -49.2 | Dark | Down | 47.5 | 247.5 | Up | 07:28:17 - 07:46:03 | 2291 |
| Idyllwild | 07:37:20 | -50.9 | Dark | Down | 50.3 | 246.6 | Up | 07:28:27 - 07:46:13 | 2252 |
| Lake Havasu City | 07:37:13 | -50.1 | Dark | Down | 48.2 | 248.0 | Up | 07:28:20 - 07:46:06 | 2221 |
| Calipatria | 07:37:18 | -51.5 | Dark | Down | 49.6 | 248.4 | Up | 07:28:25 - 07:46:11 | 2140 |
| Yuma | 07:37:17 | -51.9 | Dark | Down | 49.0 | 249.6 | Up | 07:28:24 - 07:46:10 | 2059 |
| George/Scottsdale | 07:37:09 | -50.8 | Dark | Down | 46.5 | 250.9 | Up | 07:28:16 - 07:46:02 | 2040 |
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 523700, (2027/09/09 07:40UT) Object RA Dec mag sep mel Deneb 20:41:25.9 +45:16:49 1.3 32.84 79 Tarazed 19:46:15.6 +10:36:48 2.7 12.16 43 3Eta Del 20:33:57.1 +13:01:38 5.5 0.65 52 PPM 138706 20:36:58.9 +12:02:55 8.1 0.59 51 PPM 138647 20:35:16.6 +12:31:12 9.3 0.05 52 523700 20:35:19.0 +12:28:13 16.0 52 Positions are for J2000
Event circumstances last updated at 2022/11/23 02:57:39 UT
Marc W. Buie, Southwest Research Institute