Event between (530930) 11WG157 and star GA1340:02520125 with event index number of 2444307
Geocentric closest approach at 2027/12/22 04:46:45 UTC
J2000 position of star is 04:54:09.7 +45:40:46
Equinox of date position of star is 04:55:48.0 +45:42:51
Stellar brightness G=13.4,
use SENSEUP=32 with the MallinCam and and exposure
time of 500 milli-seconds with the QHY174 camera.
Star is 125 degrees from the moon.
Moon is 31% illuminated.
TNO apparent brightness V=22.2
[RECON map]
TNO is 30.5 AU from the Sun
and 29.7 AU from the Earth.
The TNO is moving 24.3
km/sec on the sky relative to the star, or,
4.1 arcsec/hr.
The 1-sigma error in the time of the event is 247 seconds.
The 1-sigma cross-track error in the shadow position is
2601 km.
The sky-plane scale is
21508.9 km/arcsec.
The TNO has an absolute magnitude Hv=7.3
Diameter=211.8 km assuming a 5% albedo -- 8.7 sec chord
Diameter=86.5 km assuming a 30% albedo -- 3.6 sec chord
Dynamical classification is 1:1
Star training set for 530930, (2027/12/22 04:47UT) Object RA Dec mag sep mel Aldebaran 04:37:31.7 +16:33:48 0.8 29.42 132 34Bet Aur 06:01:34.9 +44:56:49 1.9 11.49 113 PPM 047482 04:56:52.1 +44:06:13 6.0 1.62 125 PPM 047439 04:54:24.7 +45:59:03 7.2 0.41 125 PPM 047471 04:56:20.4 +45:53:59 9.0 0.18 125 530930 04:56:12.5 +45:43:22 13.4 124 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
3.6 sigma about the mid-time.
The median site spacing is 26.8 km
RECON observability=1.0 and success probability=5.2%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Kamloops | 04:48:05 | -44.2 | Dark | Down | 68.7 | 91.3 | Up | 04:33:05 - 05:03:05 | 7199 |
| Victoria | 04:48:18 | -42.9 | Dark | Down | 66.6 | 84.0 | Up | 04:33:18 - 05:03:18 | 7130 |
| Peachland | 04:48:06 | -44.9 | Dark | Down | 69.1 | 89.4 | Up | 04:33:06 - 05:03:06 | 7092 |
| Kelowna | 04:48:05 | -45.0 | Dark | Down | 69.3 | 89.9 | Up | 04:33:05 - 05:03:05 | 7091 |
| Summerland | 04:48:07 | -45.0 | Dark | Down | 69.1 | 89.0 | Up | 04:33:07 - 05:03:07 | 7075 |
| Penticton | 04:48:06 | -45.1 | Dark | Down | 69.2 | 88.9 | Up | 04:33:06 - 05:03:06 | 7064 |
| Oliver | 04:48:07 | -45.2 | Dark | Down | 69.2 | 88.0 | Up | 04:33:07 - 05:03:07 | 7032 |
| Anarchist Mountain Observatory | 04:48:07 | -45.3 | Dark | Down | 69.3 | 87.7 | Up | 04:33:07 - 05:03:07 | 7009 |
| Tonasket | 04:48:08 | -45.4 | Dark | Down | 69.3 | 86.8 | Up | 04:33:08 - 05:03:08 | 6984 |
| Okanogan | 04:48:09 | -45.4 | Dark | Down | 69.1 | 85.9 | Up | 04:33:09 - 05:03:09 | 6959 |
| Brewster | 04:48:10 | -45.4 | Dark | Down | 69.0 | 85.0 | Up | 04:33:10 - 05:03:10 | 6942 |
| Manson/Chelan | 04:48:12 | -45.2 | Dark | Down | 68.7 | 84.3 | Up | 04:33:12 - 05:03:12 | 6938 |
| Wenatchee | 04:48:14 | -45.2 | Dark | Down | 68.6 | 83.0 | Up | 04:33:14 - 05:03:14 | 6902 |
| Ellensburg | 04:48:15 | -45.2 | Dark | Down | 68.4 | 81.8 | Up | 04:33:15 - 05:03:15 | 6873 |
| Sleaford | 04:47:27 | -51.6 | Dark | Down | 77.1 | 113.0 | Up | 04:32:27 - 05:02:27 | 6849 |
| Yakima | 04:48:16 | -45.3 | Dark | Down | 68.3 | 80.8 | Up | 04:33:16 - 05:03:16 | 6837 |
| Toppenish/White Swan | 04:48:16 | -45.4 | Dark | Down | 68.4 | 80.4 | Up | 04:33:16 - 05:03:16 | 6810 |
| Goldendale | 04:48:18 | -45.3 | Dark | Down | 68.0 | 78.8 | Up | 04:33:18 - 05:03:18 | 6777 |
| The Dalles | 04:48:20 | -45.1 | Dark | Down | 67.7 | 78.2 | Up | 04:33:20 - 05:03:20 | 6773 |
| Maupin | 04:48:21 | -45.2 | Dark | Down | 67.7 | 77.2 | Up | 04:33:21 - 05:03:21 | 6730 |
| PNWRO | 04:48:14 | -46.5 | Dark | Down | 69.3 | 80.0 | Up | 04:33:14 - 05:03:14 | 6713 |
| Sisters | 04:48:24 | -45.1 | Dark | Down | 67.1 | 75.0 | Up | 04:33:24 - 05:03:24 | 6671 |
| Bend | 04:48:24 | -45.3 | Dark | Down | 67.3 | 74.5 | Up | 04:33:24 - 05:03:24 | 6638 |
| Oregon Observatory | 04:48:25 | -45.3 | Dark | Down | 67.1 | 74.1 | Up | 04:33:25 - 05:03:25 | 6628 |
| North Lake | 04:48:26 | -45.8 | Dark | Down | 67.3 | 72.7 | Up | 04:33:26 - 05:03:26 | 6545 |
| Chiloquin | 04:48:30 | -45.2 | Dark | Down | 66.4 | 71.1 | Up | 04:33:30 - 05:03:30 | 6526 |
| Klamath Falls | 04:48:30 | -45.3 | Dark | Down | 66.4 | 70.4 | Up | 04:33:30 - 05:03:30 | 6491 |
| Lakeview | 04:48:27 | -46.4 | Dark | Down | 67.4 | 70.4 | Up | 04:33:27 - 05:03:27 | 6423 |
| Fall River/Burney | 04:48:32 | -45.8 | Dark | Down | 66.2 | 67.9 | Up | 04:33:32 - 05:03:32 | 6365 |
| Cedarville | 04:48:28 | -46.6 | Dark | Down | 67.3 | 68.9 | Up | 04:33:28 - 05:03:28 | 6354 |
| Susanville | 04:48:32 | -46.4 | Dark | Down | 66.5 | 66.5 | Up | 04:33:32 - 05:03:32 | 6273 |
| Greenville | 04:48:33 | -46.2 | Dark | Down | 66.2 | 66.0 | Up | 04:33:33 - 05:03:33 | 6261 |
| Gimple | 04:48:33 | -46.3 | Dark | Down | 66.3 | 66.0 | Up | 04:33:33 - 05:03:33 | 6257 |
| Quincy | 04:48:34 | -46.3 | Dark | Down | 66.1 | 65.6 | Up | 04:33:34 - 05:03:34 | 6242 |
| Portola | 04:48:33 | -46.6 | Dark | Down | 66.4 | 65.3 | Up | 04:33:33 - 05:03:33 | 6208 |
| Reno | 04:48:32 | -47.2 | Dark | Down | 66.7 | 64.6 | Up | 04:33:32 - 05:03:32 | 6153 |
| Carson City | 04:48:33 | -47.2 | Dark | Down | 66.6 | 63.9 | Up | 04:33:33 - 05:03:33 | 6118 |
| Gardnerville | 04:48:33 | -47.3 | Dark | Down | 66.5 | 63.4 | Up | 04:33:33 - 05:03:33 | 6093 |
| Yerington | 04:48:31 | -47.7 | Dark | Down | 67.0 | 63.4 | Up | 04:33:31 - 05:03:31 | 6071 |
| Hawthorne | 04:48:31 | -48.2 | Dark | Down | 67.1 | 62.3 | Up | 04:33:31 - 05:03:31 | 6002 |
| Lee Vining | 04:48:33 | -47.9 | Dark | Down | 66.5 | 61.2 | Up | 04:33:33 - 05:03:33 | 5972 |
| Tonopah | 04:48:28 | -49.4 | Dark | Down | 67.9 | 60.9 | Up | 04:33:28 - 05:03:28 | 5893 |
| Bishop | 04:48:33 | -48.5 | Dark | Down | 66.7 | 59.8 | Up | 04:33:33 - 05:03:33 | 5882 |
| Beatty | 04:48:29 | -49.9 | Dark | Down | 67.6 | 58.3 | Up | 04:33:29 - 05:03:29 | 5762 |
| Indian Springs | 04:48:27 | -50.8 | Dark | Down | 68.1 | 57.1 | Up | 04:33:27 - 05:03:27 | 5682 |
| Dunrhomin | 04:47:47 | -57.7 | Dark | Down | 77.0 | 60.0 | Up | 04:32:47 - 05:02:47 | 5629 |
| CU-SBO | 04:47:48 | -57.8 | Dark | Down | 76.8 | 59.2 | Up | 04:32:48 - 05:02:48 | 5607 |
| Henderson | 04:48:26 | -51.4 | Dark | Down | 68.3 | 55.6 | Up | 04:33:26 - 05:03:26 | 5599 |
| Wildwood | 04:48:40 | -48.7 | Dark | Down | 64.8 | 53.8 | Up | 04:33:40 - 05:03:40 | 5583 |
| Laughlin/Bullhead City | 04:48:26 | -51.8 | Dark | Down | 68.1 | 53.6 | Up | 04:33:26 - 05:03:26 | 5497 |
| Patrick | 04:48:24 | -52.4 | Dark | Down | 68.7 | 53.6 | Up | 04:33:24 - 05:03:24 | 5489 |
| Kingman/Dolan Springs | 04:48:25 | -52.2 | Dark | Down | 68.4 | 53.3 | Up | 04:33:25 - 05:03:25 | 5476 |
| Mohave Valley | 04:48:27 | -51.9 | Dark | Down | 67.9 | 53.1 | Up | 04:33:27 - 05:03:27 | 5471 |
| Idyllwild | 04:48:36 | -50.2 | Dark | Down | 65.8 | 52.2 | Up | 04:33:36 - 05:03:36 | 5459 |
| Lake Havasu City | 04:48:27 | -52.1 | Dark | Down | 67.8 | 52.1 | Up | 04:33:27 - 05:03:27 | 5421 |
| Parker | 04:48:28 | -52.2 | Dark | Down | 67.6 | 51.4 | Up | 04:33:28 - 05:03:28 | 5386 |
| Calipatria | 04:48:33 | -51.2 | Dark | Down | 66.2 | 50.4 | Up | 04:33:33 - 05:03:33 | 5345 |
| Yuma | 04:48:31 | -52.0 | Dark | Down | 66.5 | 49.0 | Up | 04:33:31 - 05:03:31 | 5261 |
| George/Scottsdale | 04:48:20 | -54.2 | Dark | Down | 68.9 | 48.7 | Up | 04:33:20 - 05:03:20 | 5236 |
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 530930, (2027/12/22 04:47UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:29 0.8 29.42 132 34Bet Aur 05:59:31.6 +44:56:51 1.9 11.49 113 PPM 047482 04:54:51.2 +44:03:38 6.0 1.62 125 PPM 047439 04:52:21.6 +45:56:23 7.2 0.41 125 PPM 047471 04:54:17.4 +45:51:22 9.0 0.18 125 530930 04:54:09.7 +45:40:46 13.4 125 Positions are for J2000
Event circumstances last updated at 2022/05/19 23:04:58 UT
Marc W. Buie, Southwest Research Institute