Event between 99HH12 and star GA0700:05791294 with event index number of 1138498
Geocentric closest approach at 2022/03/18 11:36:59 UTC
J2000 position of star is 15:28:46.4 -19:25:20
Equinox of date position of star is 15:30:03.0 -19:29:52
Stellar brightness G=16.4,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 55 degrees from the moon.
Moon is 100% illuminated.
TNO apparent brightness V=23.5
[RECON map]
TNO is 43.7 AU from the Sun
and 43.1 AU from the Earth.
The TNO is moving 11.3
km/sec on the sky relative to the star, or,
1.3 arcsec/hr.
The 1-sigma error in the time of the event is 1538 seconds.
The 1-sigma cross-track error in the shadow position is
5579 km.
The sky-plane scale is
31291.6 km/arcsec.
The TNO has an absolute magnitude Hv=7.0
Diameter=242.1 km assuming a 5% albedo -- 21.4 sec chord
Diameter=98.8 km assuming a 30% albedo -- 8.7 sec chord
Dynamical classification is CLASSICAL
Star training set for 99HH12, (2022/03/18 11:37UT) Object RA Dec mag sep mel Antares 16:30:46.4 -26:28:46 0.9 15.60 70 7Del Sco 16:01:39.0 -22:40:59 2.3 8.03 63 PPM 230380 15:33:53.5 -19:44:40 5.5 0.94 56 PPM 230293 15:29:59.5 -18:47:57 8.3 0.70 54 PPM 230306 15:30:41.0 -19:28:48 8.9 0.15 55 99HH12 15:30:03.0 -19:29:52 16.4 55 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
0.6 sigma about the mid-time.
The median site spacing is 13.0 km
RECON observability=1.0 and success probability=3.1%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Sleaford | 11:37:47 | -14.9 | AT | Up | 17.7 | 192.2 | Really Low | 11:22:47 - 11:52:47 | 6734 |
| Kamloops | 11:39:09 | -23.5 | Dark | Up | 19.9 | 178.2 | Really Low | 11:24:09 - 11:54:09 | 6488 |
| Kelowna | 11:39:04 | -23.4 | Dark | Up | 20.7 | 179.1 | Low | 11:24:04 - 11:54:04 | 6472 |
| Peachland | 11:39:06 | -23.6 | Dark | Up | 20.8 | 178.8 | Low | 11:24:06 - 11:54:06 | 6463 |
| Summerland | 11:39:07 | -23.6 | Dark | Up | 21.0 | 178.9 | Low | 11:24:07 - 11:54:07 | 6458 |
| Penticton | 11:39:04 | -23.6 | Dark | Up | 21.0 | 179.0 | Low | 11:24:04 - 11:54:04 | 6458 |
| Oliver | 11:39:07 | -23.7 | Dark | Up | 21.4 | 179.0 | Low | 11:24:07 - 11:54:07 | 6444 |
| Anarchist Mountain Observatory | 11:39:03 | -23.7 | Dark | Up | 21.6 | 179.2 | Low | 11:24:03 - 11:54:03 | 6441 |
| Tonasket | 11:39:04 | -23.9 | Dark | Up | 21.9 | 179.1 | Low | 11:24:04 - 11:54:04 | 6426 |
| Okanogan | 11:39:05 | -24.2 | Dark | Up | 22.2 | 179.0 | Low | 11:24:05 - 11:54:05 | 6410 |
| Brewster | 11:39:04 | -24.4 | Dark | Up | 22.5 | 178.8 | Low | 11:24:04 - 11:54:04 | 6395 |
| Manson/Chelan | 11:39:06 | -24.7 | Dark | Up | 22.7 | 178.4 | Low | 11:24:06 - 11:54:06 | 6380 |
| Wenatchee | 11:39:07 | -25.1 | Dark | Up | 23.1 | 178.2 | Low | 11:24:07 - 11:54:07 | 6357 |
| Victoria | 11:39:28 | -26.2 | Dark | Up | 21.9 | 175.2 | Low | 11:24:28 - 11:54:28 | 6348 |
| Ellensburg | 11:39:11 | -25.4 | Dark | Up | 23.6 | 178.0 | Low | 11:24:11 - 11:54:11 | 6335 |
| PNWRO | 11:38:58 | -24.9 | Dark | Up | 24.6 | 179.7 | Low | 11:23:58 - 11:53:58 | 6320 |
| Yakima | 11:39:09 | -25.6 | Dark | Up | 24.0 | 178.0 | Low | 11:24:09 - 11:54:09 | 6317 |
| Toppenish/White Swan | 11:39:11 | -25.6 | Dark | Up | 24.2 | 178.2 | Low | 11:24:11 - 11:54:11 | 6310 |
| Goldendale | 11:39:09 | -26.1 | Dark | Up | 24.7 | 177.7 | Low | 11:24:09 - 11:54:09 | 6277 |
| The Dalles | 11:39:14 | -26.4 | Dark | Up | 24.9 | 177.3 | Low | 11:24:14 - 11:54:14 | 6259 |
| Dunrhomin | 11:37:18 | -17.8 | AT | Up | 29.1 | 194.0 | Low | 11:22:18 - 11:52:18 | 6256 |
| Maupin | 11:39:14 | -26.6 | Dark | Up | 25.4 | 177.4 | Low | 11:24:14 - 11:54:14 | 6242 |
| CU-SBO | 11:37:17 | -18.0 | AT | Up | 29.4 | 194.0 | Low | 11:22:17 - 11:52:17 | 6242 |
| Sisters | 11:39:14 | -27.3 | Dark | Up | 26.2 | 176.9 | Low | 11:24:14 - 11:54:14 | 6191 |
| Bend | 11:39:12 | -27.3 | Dark | Up | 26.5 | 177.2 | Low | 11:24:12 - 11:54:12 | 6184 |
| Oregon Observatory | 11:39:13 | -27.4 | Dark | Up | 26.6 | 177.0 | Low | 11:24:13 - 11:54:13 | 6173 |
| North Lake | 11:39:11 | -27.4 | Dark | Up | 27.3 | 177.6 | Low | 11:24:11 - 11:54:11 | 6152 |
| Lakeview | 11:39:05 | -27.5 | Dark | Up | 28.4 | 178.1 | Low | 11:24:05 - 11:54:05 | 6109 |
| Chiloquin | 11:39:15 | -28.3 | Dark | Up | 27.9 | 176.6 | Low | 11:24:15 - 11:54:15 | 6098 |
| Klamath Falls | 11:39:15 | -28.4 | Dark | Up | 28.3 | 176.6 | Low | 11:24:15 - 11:54:15 | 6082 |
| Cedarville | 11:39:02 | -27.7 | Dark | Up | 29.0 | 178.3 | Low | 11:24:02 - 11:54:02 | 6078 |
| Fall River/Burney | 11:39:11 | -28.7 | Dark | Up | 29.5 | 177.0 | Low | 11:24:11 - 11:54:11 | 6027 |
| Susanville | 11:39:05 | -28.5 | Dark | Up | 30.1 | 177.8 | Up | 11:24:05 - 11:54:05 | 6008 |
| Gimple | 11:39:06 | -28.8 | Dark | Up | 30.4 | 177.5 | Up | 11:24:06 - 11:54:06 | 5988 |
| Greenville | 11:39:07 | -28.8 | Dark | Up | 30.4 | 177.4 | Up | 11:24:07 - 11:54:07 | 5986 |
| Portola | 11:39:04 | -28.6 | Dark | Up | 30.7 | 177.9 | Up | 11:24:04 - 11:54:04 | 5978 |
| Reno | 11:39:00 | -28.3 | Dark | Up | 31.0 | 178.6 | Up | 11:24:00 - 11:54:00 | 5976 |
| Quincy | 11:39:07 | -28.9 | Dark | Up | 30.6 | 177.4 | Up | 11:24:07 - 11:54:07 | 5975 |
| Yerington | 11:38:54 | -28.1 | Dark | Up | 31.6 | 179.3 | Up | 11:23:54 - 11:53:54 | 5958 |
| Carson City | 11:39:00 | -28.5 | Dark | Up | 31.4 | 178.7 | Up | 11:24:00 - 11:54:00 | 5957 |
| Gardnerville | 11:38:57 | -28.5 | Dark | Up | 31.6 | 178.7 | Up | 11:23:57 - 11:53:57 | 5944 |
| Tonopah | 11:38:39 | -27.1 | Dark | Up | 32.5 | 181.4 | Up | 11:23:39 - 11:53:39 | 5943 |
| Hawthorne | 11:38:48 | -27.9 | Dark | Up | 32.1 | 179.9 | Up | 11:23:48 - 11:53:48 | 5942 |
| Lee Vining | 11:38:52 | -28.5 | Dark | Up | 32.6 | 179.3 | Up | 11:23:52 - 11:53:52 | 5900 |
| Indian Springs | 11:38:27 | -26.6 | Dark | Up | 33.9 | 183.1 | Up | 11:23:27 - 11:53:27 | 5884 |
| Beatty | 11:38:32 | -27.2 | Dark | Up | 33.7 | 181.9 | Up | 11:23:32 - 11:53:32 | 5883 |
| Bishop | 11:38:45 | -28.2 | Dark | Up | 33.2 | 180.1 | Up | 11:23:45 - 11:53:45 | 5879 |
| Henderson | 11:38:08 | -26.3 | Dark | Up | 34.4 | 183.9 | Up | 11:23:08 - 11:53:08 | 5866 |
| Patrick | 11:38:07 | -25.6 | Dark | Up | 35.0 | 185.2 | Up | 11:23:07 - 11:53:07 | 5848 |
| Kingman/Dolan Springs | 11:38:07 | -25.8 | Dark | Up | 35.2 | 185.0 | Up | 11:23:07 - 11:53:07 | 5831 |
| Laughlin/Bullhead City | 11:38:07 | -26.3 | Dark | Up | 35.3 | 184.4 | Up | 11:23:07 - 11:53:07 | 5820 |
| Mohave Valley | 11:38:08 | -26.3 | Dark | Up | 35.6 | 184.4 | Up | 11:23:08 - 11:53:08 | 5803 |
| Lake Havasu City | 11:38:08 | -26.3 | Dark | Up | 35.9 | 184.7 | Up | 11:23:08 - 11:53:08 | 5782 |
| George/Scottsdale | 11:37:51 | -24.6 | Dark | Up | 36.5 | 187.6 | Up | 11:22:51 - 11:52:51 | 5778 |
| Parker | 11:38:07 | -26.4 | Dark | Up | 36.3 | 184.8 | Up | 11:23:07 - 11:53:07 | 5761 |
| Idyllwild | 11:38:29 | -28.3 | Dark | Up | 36.8 | 182.0 | Up | 11:23:29 - 11:53:29 | 5689 |
| Calipatria | 11:38:08 | -27.7 | Dark | Up | 37.4 | 183.4 | Up | 11:23:08 - 11:53:08 | 5673 |
| Wildwood | 11:38:43 | -29.6 | Dark | Up | 36.5 | 179.9 | Up | 11:23:43 - 11:53:43 | 5672 |
| Yuma | 11:38:07 | -27.1 | Dark | Up | 37.8 | 184.4 | Up | 11:23:07 - 11:53:07 | 5661 |
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 99HH12, (2022/03/18 11:37UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 15.60 70 7Del Sco 16:00:20.0 -22:37:18 2.3 8.03 63 PPM 230380 15:32:36.7 -19:40:14 5.5 0.94 56 PPM 230293 15:28:43.2 -18:43:25 8.3 0.70 54 PPM 230306 15:29:24.4 -19:24:17 8.9 0.15 55 99HH12 15:28:46.4 -19:25:20 16.4 55 Positions are for J2000
Event circumstances last updated at 2022/03/16 00:53:51 UT
Marc W. Buie, Southwest Research Institute