Event between (552678) 10JG210 and star GA0780:17980037 with event index number of 2224767
Geocentric closest approach at 2027/08/20 07:41:58 UTC
J2000 position of star is 19:01:25.0 -10:30:17
Equinox of date position of star is 19:02:40.8 -10:28:14
Stellar brightness G=14.1,
use SENSEUP=64 with the MallinCam and and exposure
time of 1 seconds with the QHY174 camera.
Star is 75 degrees from the moon.
Moon is 92% illuminated.
TNO apparent brightness V=21.0
[RECON map]
TNO is 17.4 AU from the Sun
and 16.6 AU from the Earth.
The TNO is moving 16.0
km/sec on the sky relative to the star, or,
4.8 arcsec/hr.
The 1-sigma error in the time of the event is 179 seconds.
The 1-sigma cross-track error in the shadow position is
1965 km.
The sky-plane scale is
12065.2 km/arcsec.
The TNO has an absolute magnitude Hv=8.5
Diameter=114.3 km assuming a 5% albedo -- 7.4 sec chord
Diameter=46.7 km assuming a 30% albedo -- 3.0 sec chord
Dynamical classification is CENTAURR
Star training set for 552678, (2027/08/20 07:42UT) Object RA Dec mag sep mel Antares 16:31:06.4 -26:29:27 0.9 39.20 111 Nunki 18:56:58.6 -26:15:35 2.0 15.86 78 PPM 235666 19:14:48.2 -12:14:02 5.2 3.40 72 PPM 235404 19:04:05.9 -10:40:47 7.2 0.36 74 PPM 235375 19:03:07.7 -10:39:46 9.3 0.20 74 552678 19:02:56.5 -10:27:48 14.1 74 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 30.4 km
RECON observability=1.0 and success probability=25.4%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Kamloops | 07:36:42 | -26.5 | Dark | Up | 20.9 | 219.2 | Low | 07:21:42 - 07:51:42 | 1168 |
| Victoria | 07:36:50 | -28.3 | Dark | Up | 23.8 | 216.8 | Low | 07:21:50 - 07:51:50 | 1125 |
| Peachland | 07:36:40 | -27.5 | Dark | Up | 21.4 | 220.0 | Low | 07:21:40 - 07:51:40 | 1074 |
| Kelowna | 07:36:39 | -27.4 | Dark | Up | 21.2 | 220.2 | Low | 07:21:39 - 07:51:39 | 1071 |
| Summerland | 07:36:40 | -27.7 | Dark | Up | 21.5 | 220.1 | Low | 07:21:40 - 07:51:40 | 1059 |
| Penticton | 07:36:39 | -27.7 | Dark | Up | 21.5 | 220.2 | Low | 07:21:39 - 07:51:39 | 1049 |
| Oliver | 07:36:39 | -28.1 | Dark | Up | 21.8 | 220.3 | Low | 07:21:39 - 07:51:39 | 1022 |
| Anarchist Mountain Observatory | 07:36:39 | -28.3 | Dark | Up | 21.8 | 220.5 | Low | 07:21:39 - 07:51:39 | 1001 |
| Okanogan | 07:36:39 | -28.9 | Dark | Up | 22.4 | 220.5 | Low | 07:21:39 - 07:51:39 | 959 |
| Brewster | 07:36:40 | -29.1 | Dark | Up | 22.7 | 220.4 | Low | 07:21:40 - 07:51:40 | 946 |
| Manson/Chelan | 07:36:40 | -29.3 | Dark | Up | 23.0 | 220.1 | Low | 07:21:40 - 07:51:40 | 945 |
| Wenatchee | 07:36:41 | -29.8 | Dark | Up | 23.4 | 220.1 | Low | 07:21:41 - 07:51:41 | 914 |
| Ellensburg | 07:36:41 | -30.2 | Dark | Up | 23.9 | 220.0 | Low | 07:21:41 - 07:51:41 | 891 |
| Yakima | 07:36:41 | -30.6 | Dark | Up | 24.2 | 220.1 | Low | 07:21:41 - 07:51:41 | 859 |
| Toppenish/White Swan | 07:36:41 | -30.8 | Dark | Up | 24.3 | 220.3 | Low | 07:21:41 - 07:51:41 | 835 |
| The Dalles | 07:36:43 | -31.5 | Dark | Up | 25.2 | 219.8 | Low | 07:21:43 - 07:51:43 | 806 |
| Sleaford | 07:36:11 | -25.1 | Dark | Up | 13.6 | 232.0 | Really Low | 07:21:11 - 07:51:11 | 770 |
| Maupin | 07:36:42 | -31.9 | Dark | Up | 25.5 | 220.0 | Low | 07:21:42 - 07:51:42 | 768 |
| PNWRO | 07:36:37 | -31.3 | Dark | Up | 23.9 | 221.8 | Low | 07:21:37 - 07:51:37 | 743 |
| Sisters | 07:36:44 | -32.7 | Dark | Up | 26.4 | 219.8 | Low | 07:21:44 - 07:51:44 | 719 |
| Bend | 07:36:43 | -33.0 | Dark | Up | 26.4 | 220.1 | Low | 07:21:43 - 07:51:43 | 689 |
| Oregon Observatory | 07:36:43 | -33.1 | Dark | Up | 26.6 | 220.0 | Low | 07:21:43 - 07:51:43 | 681 |
| Chiloquin | 07:36:45 | -34.4 | Dark | Up | 27.8 | 220.1 | Low | 07:21:45 - 07:51:45 | 592 |
| Klamath Falls | 07:36:45 | -34.7 | Dark | Up | 28.1 | 220.3 | Low | 07:21:45 - 07:51:45 | 561 |
| Fall River/Burney | 07:36:44 | -36.0 | Dark | Up | 28.8 | 221.1 | Low | 07:21:44 - 07:51:44 | 446 |
| Cedarville | 07:36:40 | -35.6 | Dark | Up | 27.8 | 222.1 | Low | 07:21:40 - 07:51:40 | 431 |
| Greenville | 07:36:43 | -36.9 | Dark | Up | 29.2 | 221.8 | Low | 07:21:43 - 07:51:43 | 350 |
| Gimple | 07:36:43 | -36.9 | Dark | Up | 29.2 | 221.9 | Low | 07:21:43 - 07:51:43 | 346 |
| Quincy | 07:36:43 | -37.1 | Dark | Up | 29.4 | 221.9 | Low | 07:21:43 - 07:51:43 | 332 |
| Portola | 07:36:42 | -37.3 | Dark | Up | 29.2 | 222.4 | Low | 07:21:42 - 07:51:42 | 300 |
| Reno | 07:36:39 | -37.6 | Dark | Up | 29.1 | 223.1 | Low | 07:21:39 - 07:51:39 | 247 |
| Carson City | 07:36:39 | -38.0 | Dark | Up | 29.3 | 223.3 | Low | 07:21:39 - 07:51:39 | 216 |
| Gardnerville | 07:36:39 | -38.2 | Dark | Up | 29.5 | 223.4 | Low | 07:21:39 - 07:51:39 | 193 |
| Yerington | 07:36:37 | -38.2 | Dark | Up | 29.1 | 223.9 | Low | 07:21:37 - 07:51:37 | 169 |
| Hawthorne | 07:36:36 | -38.7 | Dark | Up | 29.2 | 224.6 | Low | 07:21:36 - 07:51:36 | 105 |
| Lee Vining | 07:36:38 | -39.3 | Dark | Up | 29.9 | 224.4 | Low | 07:21:38 - 07:51:38 | 79 |
| Bishop | 07:36:36 | -39.9 | Dark | Up | 29.9 | 225.3 | Low | 07:21:36 - 07:51:36 | -7 |
| Beatty | 07:36:31 | -40.5 | Dark | Up | 29.3 | 227.0 | Low | 07:21:31 - 07:51:31 | -125 |
| Wildwood | 07:36:39 | -43.2 | Dark | Up | 32.3 | 226.5 | Up | 07:21:39 - 07:51:39 | -286 |
| Dunrhomin | 07:35:59 | -36.8 | Dark | Up | 20.2 | 235.5 | Low | 07:20:59 - 07:50:59 | -322 |
| CU-SBO | 07:35:59 | -37.0 | Dark | Up | 20.4 | 235.5 | Low | 07:20:59 - 07:50:59 | -341 |
| Laughlin/Bullhead City | 07:36:25 | -42.3 | Dark | Up | 29.1 | 229.6 | Low | 07:21:25 - 07:51:25 | -383 |
| Patrick | 07:36:23 | -42.1 | Dark | Up | 28.5 | 230.1 | Low | 07:21:23 - 07:51:23 | -394 |
| Idyllwild | 07:36:33 | -43.7 | Dark | Up | 31.4 | 228.4 | Up | 07:21:33 - 07:51:33 | -410 |
| Lake Havasu City | 07:36:25 | -43.0 | Dark | Up | 29.4 | 230.1 | Low | 07:21:25 - 07:51:25 | -456 |
| Calipatria | 07:36:30 | -44.3 | Dark | Up | 31.0 | 229.7 | Up | 07:21:30 - 07:51:30 | -524 |
| Yuma | 07:36:27 | -44.8 | Dark | Up | 30.7 | 230.7 | Up | 07:21:27 - 07:51:27 | -607 |
| George/Scottsdale | 07:36:18 | -43.8 | Dark | Up | 28.3 | 232.5 | Low | 07:21:18 - 07:51:18 | -644 |
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 552678, (2027/08/20 07:42UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 39.20 111 Nunki 18:55:15.9 -26:17:49 2.0 15.86 78 PPM 235666 19:13:15.6 -12:16:58 5.2 3.40 72 PPM 235404 19:02:34.2 -10:43:18 7.2 0.36 74 PPM 235375 19:01:36.0 -10:42:15 9.3 0.20 74 552678 19:01:25.0 -10:30:17 14.1 74 Positions are for J2000
Event circumstances last updated at 2022/11/22 03:42:12 UT
Marc W. Buie, Southwest Research Institute