Event between 12HX87 and star GA0620:06961416 with event index number of 1573447
Geocentric closest approach at 2021/05/10 09:51:27 UTC
J2000 position of star is 14:54:17.3 -26:00:44
Equinox of date position of star is 14:55:32.4 -26:05:53
Stellar brightness G=16.7,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 162 degrees from the moon.
Moon is 2% illuminated.
TNO apparent brightness V=22.2
[RECON map]
TNO is 37.0 AU from the Sun
and 36.0 AU from the Earth.
The TNO is moving 23.5
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 157 seconds.
The 1-sigma cross-track error in the shadow position is
1603 km.
The sky-plane scale is
26078.5 km/arcsec.
The TNO has an absolute magnitude Hv=6.6
Diameter=284.5 km assuming a 5% albedo -- 12.1 sec chord
Diameter=116.1 km assuming a 30% albedo -- 5.0 sec chord
Dynamical classification is SCATNEAR
Star training set for 12HX87, (2021/05/10 09:51UT) Object RA Dec mag sep mel Antares 16:30:43.2 -26:28:39 0.9 21.31 144 5The Cen 14:07:56.8 -36:28:27 2.1 14.50 154 56 Hya 14:48:59.9 -26:10:33 5.2 1.47 162 PPM 263565 14:56:42.0 -25:42:04 8.3 0.47 162 PPM 263558 14:56:18.8 -26:21:22 9.6 0.31 161 12HX87 14:55:32.6 -26:05:54 16.7 161 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 19.0 km
RECON observability=0.1 and success probability=0.0%
| 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 | 09:51:21 | -17.2 | AT | Down | 8.2 | 210.0 | Really Low | 09:37:48 - 10:04:55 | 11590 |
| Kelowna | 09:51:21 | -17.6 | AT | Down | 8.6 | 209.9 | Really Low | 09:37:48 - 10:04:55 | 11583 |
| Peachland | 09:51:20 | -17.8 | AT | Down | 8.8 | 209.6 | Really Low | 09:37:46 - 10:04:53 | 11580 |
| Summerland | 09:51:20 | -17.9 | AT | Down | 8.9 | 209.7 | Really Low | 09:37:46 - 10:04:53 | 11578 |
| Penticton | 09:51:20 | -17.9 | AT | Down | 8.9 | 209.8 | Really Low | 09:37:47 - 10:04:54 | 11577 |
| Oliver | 09:51:18 | -18.3 | Dark | Down | 9.2 | 209.8 | Really Low | 09:37:45 - 10:04:52 | 11571 |
| Anarchist Mountain Observatory | 09:51:18 | -18.3 | Dark | Down | 9.3 | 210.0 | Really Low | 09:37:44 - 10:04:51 | 11570 |
| Tonasket | 09:51:17 | -18.6 | Dark | Down | 9.6 | 210.0 | Really Low | 09:37:43 - 10:04:50 | 11563 |
| Okanogan | 09:51:18 | -19.0 | Dark | Down | 9.9 | 209.9 | Really Low | 09:37:44 - 10:04:51 | 11557 |
| Brewster | 09:51:17 | -19.3 | Dark | Down | 10.2 | 209.7 | Really Low | 09:37:43 - 10:04:50 | 11551 |
| Manson/Chelan | 09:51:18 | -19.6 | Dark | Down | 10.5 | 209.4 | Really Low | 09:37:44 - 10:04:51 | 11545 |
| Victoria | 09:51:28 | -20.0 | Dark | Down | 11.0 | 206.6 | Really Low | 09:37:54 - 10:05:01 | 11540 |
| Wenatchee | 09:51:16 | -20.1 | Dark | Down | 11.0 | 209.3 | Really Low | 09:37:43 - 10:04:50 | 11535 |
| Ellensburg | 09:51:17 | -20.5 | Dark | Down | 11.4 | 209.2 | Really Low | 09:37:43 - 10:04:50 | 11525 |
| Yakima | 09:51:16 | -20.8 | Dark | Down | 11.8 | 209.2 | Really Low | 09:37:43 - 10:04:50 | 11516 |
| Pasco | 09:51:11 | -20.7 | Dark | Down | 11.6 | 210.4 | Really Low | 09:37:37 - 10:04:44 | 11514 |
| Toppenish/White Swan | 09:51:15 | -21.0 | Dark | Down | 11.9 | 209.4 | Really Low | 09:37:42 - 10:04:49 | 11512 |
| PNWRO | 09:51:09 | -20.8 | Dark | Down | 11.7 | 210.7 | Really Low | 09:37:36 - 10:04:43 | 11510 |
| Goldendale | 09:51:16 | -21.6 | Dark | Down | 12.6 | 209.1 | Really Low | 09:37:43 - 10:04:50 | 11497 |
| The Dalles | 09:51:15 | -21.9 | Dark | Down | 12.9 | 208.8 | Really Low | 09:37:42 - 10:04:49 | 11490 |
| Maupin | 09:51:13 | -22.3 | Dark | Down | 13.2 | 208.9 | Really Low | 09:37:40 - 10:04:47 | 11480 |
| Redmond | 09:51:11 | -23.1 | Dark | Down | 14.0 | 208.9 | Really Low | 09:37:38 - 10:04:45 | 11457 |
| Sisters | 09:51:14 | -23.2 | Dark | Down | 14.2 | 208.6 | Really Low | 09:37:41 - 10:04:48 | 11455 |
| Bend | 09:51:13 | -23.3 | Dark | Down | 14.3 | 208.8 | Really Low | 09:37:39 - 10:04:46 | 11451 |
| Oregon Observatory | 09:51:12 | -23.5 | Dark | Down | 14.5 | 208.7 | Really Low | 09:37:38 - 10:04:45 | 11445 |
| La Pine/Gilchrist | 09:51:12 | -23.7 | Dark | Down | 14.7 | 208.7 | Really Low | 09:37:38 - 10:04:45 | 11439 |
| North Lake | 09:51:09 | -23.9 | Dark | Down | 14.9 | 209.3 | Really Low | 09:37:36 - 10:04:43 | 11430 |
| Paisley | 09:51:07 | -24.3 | Dark | Down | 15.2 | 209.6 | Really Low | 09:37:33 - 10:04:40 | 11416 |
| Chiloquin | 09:51:11 | -24.8 | Dark | Down | 15.8 | 208.6 | Really Low | 09:37:38 - 10:04:45 | 11405 |
| Lakeview | 09:51:05 | -24.6 | Dark | Down | 15.6 | 209.9 | Really Low | 09:37:32 - 10:04:39 | 11402 |
| Klamath Falls | 09:51:09 | -25.1 | Dark | Down | 16.1 | 208.7 | Really Low | 09:37:36 - 10:04:43 | 11395 |
| Cedarville | 09:51:03 | -25.1 | Dark | Down | 16.1 | 210.1 | Really Low | 09:37:29 - 10:04:36 | 11383 |
| Fall River/Burney | 09:51:07 | -26.0 | Dark | Down | 17.0 | 209.2 | Really Low | 09:37:33 - 10:04:40 | 11360 |
| Susanville | 09:51:03 | -26.3 | Dark | Down | 17.2 | 209.9 | Really Low | 09:37:29 - 10:04:36 | 11344 |
| Gimple | 09:51:02 | -26.6 | Dark | Down | 17.6 | 209.7 | Really Low | 09:37:29 - 10:04:36 | 11333 |
| Greenville | 09:51:02 | -26.6 | Dark | Down | 17.6 | 209.7 | Really Low | 09:37:29 - 10:04:36 | 11332 |
| Dunrhomin | 09:50:18 | -19.4 | Dark | Down | 10.5 | 222.2 | Really Low | 09:36:45 - 10:03:52 | 11329 |
| Quincy | 09:51:03 | -26.8 | Dark | Down | 17.8 | 209.7 | Really Low | 09:37:29 - 10:04:36 | 11325 |
| Portola | 09:51:01 | -26.7 | Dark | Down | 17.7 | 210.1 | Really Low | 09:37:27 - 10:04:34 | 11324 |
| Reno | 09:50:58 | -26.7 | Dark | Down | 17.7 | 210.7 | Really Low | 09:37:24 - 10:04:31 | 11318 |
| Carson City | 09:50:58 | -27.0 | Dark | Down | 18.0 | 210.8 | Really Low | 09:37:25 - 10:04:32 | 11305 |
| Yerington | 09:50:54 | -26.9 | Dark | Down | 17.9 | 211.3 | Really Low | 09:37:21 - 10:04:28 | 11301 |
| Gardnerville | 09:50:56 | -27.2 | Dark | Down | 18.2 | 210.9 | Really Low | 09:37:22 - 10:04:29 | 11297 |
| Hawthorne | 09:50:52 | -27.1 | Dark | Down | 18.1 | 211.9 | Really Low | 09:37:18 - 10:04:25 | 11286 |
| Tonopah | 09:50:47 | -26.9 | Dark | Down | 17.9 | 213.1 | Really Low | 09:37:13 - 10:04:20 | 11274 |
| Lee Vining | 09:50:52 | -27.8 | Dark | Down | 18.8 | 211.5 | Really Low | 09:37:19 - 10:04:26 | 11264 |
| Bishop | 09:50:49 | -28.0 | Dark | Down | 19.0 | 212.2 | Really Low | 09:37:15 - 10:04:22 | 11243 |
| Beatty | 09:50:43 | -27.7 | Dark | Down | 18.6 | 213.7 | Really Low | 09:37:09 - 10:04:16 | 11229 |
| Indian Springs | 09:50:38 | -27.4 | Dark | Down | 18.4 | 214.6 | Really Low | 09:37:05 - 10:04:12 | 11218 |
| Henderson | 09:50:36 | -27.6 | Dark | Down | 18.6 | 215.3 | Really Low | 09:37:02 - 10:04:09 | 11197 |
| Patrick | 09:50:30 | -27.5 | Dark | Down | 18.6 | 216.3 | Really Low | 09:36:56 - 10:04:03 | 11172 |
| Kingman/Dolan Springs | 09:50:30 | -27.8 | Dark | Down | 18.8 | 216.2 | Really Low | 09:36:57 - 10:04:04 | 11162 |
| Laughlin/Bullhead City | 09:50:32 | -28.1 | Dark | Down | 19.1 | 215.8 | Really Low | 09:36:59 - 10:04:06 | 11160 |
| Mohave Valley | 09:50:31 | -28.3 | Dark | Down | 19.3 | 215.8 | Really Low | 09:36:58 - 10:04:05 | 11149 |
| CPSLO | 09:50:51 | -30.7 | Dark | Down | 21.7 | 210.7 | Low | 09:37:18 - 10:04:25 | 11146 |
| Lake Havasu City | 09:50:29 | -28.5 | Dark | Down | 19.5 | 216.1 | Really Low | 09:36:55 - 10:04:02 | 11131 |
| Parker | 09:50:29 | -28.7 | Dark | Down | 19.8 | 216.2 | Really Low | 09:36:55 - 10:04:02 | 11116 |
| Wildwood | 09:50:42 | -30.8 | Dark | Down | 21.8 | 212.7 | Low | 09:37:08 - 10:04:15 | 11104 |
| George/Scottsdale | 09:50:19 | -27.8 | Dark | Down | 18.9 | 218.2 | Really Low | 09:36:46 - 10:03:53 | 11096 |
| Idyllwild | 09:50:34 | -30.3 | Dark | Down | 21.3 | 214.3 | Low | 09:37:00 - 10:04:07 | 11095 |
| Blythe | 09:50:28 | -29.3 | Dark | Down | 20.4 | 216.1 | Low | 09:36:54 - 10:04:01 | 11092 |
| Calipatria | 09:50:30 | -30.2 | Dark | Down | 21.2 | 215.4 | Low | 09:36:56 - 10:04:03 | 11068 |
| Yuma | 09:50:25 | -30.1 | Dark | Down | 21.1 | 216.2 | Low | 09:36:52 - 10:03:59 | 11049 |
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 12HX87, (2021/05/10 09:51UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 21.31 144 5The Cen 14:06:40.0 -36:22:23 2.1 14.50 154 56 Hya 14:47:44.9 -26:05:15 5.2 1.47 162 PPM 263565 14:55:26.8 -25:36:56 8.3 0.47 162 PPM 263558 14:55:03.3 -26:16:13 9.6 0.31 161 12HX87 14:54:17.3 -26:00:44 16.7 162 Positions are for J2000
Event circumstances last updated at 2021/04/21 22:32:22 UT
Marc W. Buie, Southwest Research Institute