Event between (174567) Varda and star GA0860:06251175 with event index number of 2166836
Geocentric closest approach at 2023/03/18 09:37:21 UTC
J2000 position of star is 17:48:36.7 -02:06:18
Equinox of date position of star is 17:49:44.7 -02:06:39
Stellar brightness G=15.0,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 51 degrees from the moon.
Moon is 15% illuminated.
TNO apparent brightness V=20.2
[RECON map]
TNO is 46.1 AU from the Sun
and 46.1 AU from the Earth.
The TNO is moving 12.0
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 191 seconds.
The 1-sigma cross-track error in the shadow position is
3413 km.
The sky-plane scale is
33410.6 km/arcsec.
The TNO has an absolute magnitude Hv=3.4
Diameter=1259.0 km assuming a 5% albedo -- 104.7 sec chord
Diameter=514.0 km assuming a 30% albedo -- 42.7 sec chord
Dynamical classification is SCATEXTD
Star training set for 174567, (2023/03/18 09:38UT) Object RA Dec mag sep mel Antares 16:30:50.1 -26:28:53 0.9 30.87 62 60Bet Oph 17:44:37.2 +04:33:33 2.8 6.80 56 PPM 180184 17:53:11.5 -01:14:27 6.3 1.21 51 PPM 180167 17:49:49.4 -02:12:09 8.1 0.09 51 174567 17:49:49.2 -02:06:40 15.0 51 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
4.7 sigma about the mid-time.
The median site spacing is 13.2 km
RECON observability=0.2 and success probability=1.8%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| CPSLO | 09:39:33 | -49.9 | Dark | Down | 17.1 | 105.4 | Really Low | 09:24:33 - 09:54:33 | 7322 |
| Wildwood | 09:39:31 | -49.9 | Dark | Down | 19.1 | 106.3 | Really Low | 09:24:31 - 09:54:31 | 7278 |
| Quincy | 09:40:09 | -46.2 | Dark | Down | 15.7 | 106.6 | Really Low | 09:25:09 - 09:55:09 | 7225 |
| Lee Vining | 09:39:52 | -47.0 | Dark | Down | 17.6 | 107.3 | Really Low | 09:24:52 - 09:54:52 | 7220 |
| Greenville | 09:40:13 | -46.0 | Dark | Down | 15.7 | 106.7 | Really Low | 09:25:13 - 09:55:13 | 7220 |
| Idyllwild | 09:39:31 | -49.1 | Dark | Down | 20.7 | 107.4 | Low | 09:24:31 - 09:54:31 | 7217 |
| Gimple | 09:40:11 | -46.0 | Dark | Down | 15.8 | 106.7 | Really Low | 09:25:11 - 09:55:11 | 7217 |
| Gardnerville | 09:39:59 | -46.5 | Dark | Down | 16.9 | 107.1 | Really Low | 09:24:59 - 09:54:59 | 7216 |
| Portola | 09:40:13 | -46.1 | Dark | Down | 16.1 | 106.9 | Really Low | 09:25:13 - 09:55:13 | 7215 |
| Carson City | 09:40:04 | -46.3 | Dark | Down | 16.8 | 107.2 | Really Low | 09:25:04 - 09:55:04 | 7211 |
| Bishop | 09:39:54 | -47.2 | Dark | Down | 18.4 | 107.6 | Really Low | 09:24:54 - 09:54:54 | 7209 |
| Fall River/Burney | 09:40:18 | -45.4 | Dark | Down | 15.1 | 106.6 | Really Low | 09:25:18 - 09:55:18 | 7206 |
| Susanville | 09:40:17 | -45.6 | Dark | Down | 15.8 | 107.0 | Really Low | 09:25:17 - 09:55:17 | 7204 |
| Reno | 09:40:09 | -46.0 | Dark | Down | 16.7 | 107.3 | Really Low | 09:25:09 - 09:55:09 | 7203 |
| Yerington | 09:40:04 | -46.2 | Dark | Down | 17.3 | 107.6 | Really Low | 09:25:04 - 09:55:04 | 7196 |
| Hawthorne | 09:40:02 | -46.3 | Dark | Down | 17.9 | 107.8 | Really Low | 09:25:02 - 09:55:02 | 7191 |
| Klamath Falls | 09:40:29 | -44.5 | Dark | Down | 14.5 | 106.7 | Really Low | 09:25:29 - 09:55:29 | 7181 |
| Calipatria | 09:39:31 | -48.9 | Dark | Down | 21.8 | 108.0 | Low | 09:24:31 - 09:54:31 | 7180 |
| Chiloquin | 09:40:29 | -44.3 | Dark | Down | 14.4 | 106.7 | Really Low | 09:25:29 - 09:55:29 | 7173 |
| Beatty | 09:39:46 | -46.7 | Dark | Down | 19.7 | 108.5 | Really Low | 09:24:46 - 09:54:46 | 7163 |
| Cedarville | 09:40:22 | -44.5 | Dark | Down | 15.9 | 107.6 | Really Low | 09:25:22 - 09:55:22 | 7158 |
| Tonopah | 09:40:02 | -46.0 | Dark | Down | 19.1 | 108.6 | Really Low | 09:25:02 - 09:55:02 | 7155 |
| Yuma | 09:39:31 | -48.7 | Dark | Down | 22.7 | 108.4 | Low | 09:24:31 - 09:54:31 | 7151 |
| Lakeview | 09:40:29 | -44.0 | Dark | Down | 15.6 | 107.7 | Really Low | 09:25:29 - 09:55:29 | 7143 |
| Blythe | 09:39:31 | -48.0 | Dark | Down | 22.4 | 108.8 | Low | 09:24:31 - 09:54:31 | 7137 |
| Paisley | 09:40:31 | -43.7 | Dark | Down | 15.3 | 107.7 | Really Low | 09:25:31 - 09:55:31 | 7133 |
| Indian Springs | 09:39:52 | -46.4 | Dark | Down | 20.7 | 109.2 | Low | 09:24:52 - 09:54:52 | 7130 |
| La Pine/Gilchrist | 09:40:41 | -43.2 | Dark | Down | 14.3 | 107.3 | Really Low | 09:25:41 - 09:55:41 | 7127 |
| North Lake | 09:40:36 | -43.3 | Dark | Down | 14.9 | 107.6 | Really Low | 09:25:36 - 09:55:36 | 7125 |
| Oregon Observatory | 09:40:43 | -43.0 | Dark | Down | 14.3 | 107.4 | Really Low | 09:25:43 - 09:55:43 | 7118 |
| Parker | 09:39:33 | -47.4 | Dark | Down | 22.5 | 109.2 | Low | 09:24:33 - 09:54:33 | 7117 |
| Mohave Valley | 09:39:39 | -47.0 | Dark | Down | 22.0 | 109.3 | Low | 09:24:39 - 09:54:39 | 7117 |
| Henderson | 09:39:46 | -46.4 | Dark | Down | 21.3 | 109.5 | Low | 09:24:46 - 09:54:46 | 7114 |
| Lake Havasu City | 09:39:34 | -47.2 | Dark | Down | 22.3 | 109.3 | Low | 09:24:34 - 09:54:34 | 7113 |
| Laughlin/Bullhead City | 09:39:41 | -46.8 | Dark | Down | 21.9 | 109.4 | Low | 09:24:41 - 09:54:41 | 7112 |
| Bend | 09:40:43 | -42.8 | Dark | Down | 14.4 | 107.5 | Really Low | 09:25:43 - 09:55:43 | 7109 |
| Sisters | 09:40:48 | -42.6 | Dark | Down | 14.1 | 107.4 | Really Low | 09:25:48 - 09:55:48 | 7107 |
| Redmond | 09:40:48 | -42.5 | Dark | Down | 14.4 | 107.7 | Really Low | 09:25:48 - 09:55:48 | 7097 |
| Kingman/Dolan Springs | 09:39:42 | -46.5 | Dark | Down | 22.3 | 109.8 | Low | 09:24:42 - 09:54:42 | 7093 |
| Patrick | 09:39:44 | -46.3 | Dark | Down | 22.4 | 110.0 | Low | 09:24:44 - 09:54:44 | 7081 |
| Maupin | 09:40:55 | -41.7 | Dark | Down | 14.2 | 108.0 | Really Low | 09:25:55 - 09:55:55 | 7062 |
| The Dalles | 09:40:57 | -41.4 | Dark | Down | 14.0 | 108.0 | Really Low | 09:25:57 - 09:55:57 | 7050 |
| Goldendale | 09:40:59 | -41.0 | Dark | Down | 14.2 | 108.4 | Really Low | 09:25:59 - 09:55:59 | 7032 |
| George/Scottsdale | 09:39:33 | -46.3 | Dark | Down | 24.5 | 110.7 | Low | 09:24:33 - 09:54:33 | 7022 |
| Toppenish/White Swan | 09:41:03 | -40.4 | Dark | Down | 14.3 | 108.8 | Really Low | 09:26:03 - 09:56:03 | 7000 |
| Yakima | 09:41:09 | -40.3 | Dark | Down | 14.2 | 108.8 | Really Low | 09:26:09 - 09:56:09 | 6996 |
| Victoria | 09:41:15 | -39.5 | Dark | Down | 11.7 | 107.0 | Really Low | 09:26:15 - 09:56:15 | 6987 |
| Ellensburg | 09:41:07 | -39.9 | Dark | Down | 14.0 | 108.9 | Really Low | 09:26:07 - 09:56:07 | 6980 |
| PNWRO | 09:41:06 | -40.2 | Dark | Down | 15.4 | 109.9 | Really Low | 09:26:06 - 09:56:06 | 6972 |
| Pasco | 09:41:06 | -40.0 | Dark | Down | 15.2 | 109.8 | Really Low | 09:26:06 - 09:56:06 | 6969 |
| Wenatchee | 09:41:13 | -39.5 | Dark | Down | 14.1 | 109.2 | Really Low | 09:26:13 - 09:56:13 | 6958 |
| Manson/Chelan | 09:41:17 | -39.0 | Dark | Down | 14.0 | 109.4 | Really Low | 09:26:17 - 09:56:17 | 6935 |
| Brewster | 09:41:18 | -38.7 | Dark | Down | 14.2 | 109.8 | Really Low | 09:26:18 - 09:56:18 | 6916 |
| Okanogan | 09:41:23 | -38.4 | Dark | Down | 14.2 | 110.0 | Really Low | 09:26:23 - 09:56:23 | 6900 |
| Tonasket | 09:41:28 | -38.0 | Dark | Down | 14.2 | 110.2 | Really Low | 09:26:28 - 09:56:28 | 6883 |
| Anarchist Mountain Observatory | 09:41:27 | -37.8 | Dark | Down | 14.2 | 110.4 | Really Low | 09:26:27 - 09:56:27 | 6868 |
| Oliver | 09:41:30 | -37.7 | Dark | Down | 14.0 | 110.3 | Really Low | 09:26:30 - 09:56:30 | 6866 |
| Summerland | 09:41:31 | -37.3 | Dark | Down | 13.8 | 110.3 | Really Low | 09:26:31 - 09:56:31 | 6851 |
| Penticton | 09:41:34 | -37.4 | Dark | Down | 13.9 | 110.4 | Really Low | 09:26:34 - 09:56:34 | 6851 |
| Peachland | 09:41:34 | -37.2 | Dark | Down | 13.7 | 110.2 | Really Low | 09:26:34 - 09:56:34 | 6847 |
| Kelowna | 09:41:32 | -37.0 | Dark | Down | 13.8 | 110.5 | Really Low | 09:26:32 - 09:56:32 | 6834 |
| Clarence Fulton | 09:41:37 | -36.7 | Dark | Down | 13.8 | 110.7 | Really Low | 09:26:37 - 09:56:37 | 6813 |
| Dunrhomin | 09:40:42 | -37.8 | Dark | Down | 26.8 | 118.8 | Low | 09:25:42 - 09:55:42 | 6613 |
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 174567, (2023/03/18 09:38UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 30.87 62 60Bet Oph 17:43:28.3 +04:34:06 2.8 6.80 56 PPM 180184 17:51:59.5 -01:14:12 6.3 1.21 51 PPM 180167 17:48:36.9 -02:11:47 8.1 0.09 51 174567 17:48:36.7 -02:06:18 15.0 51 Positions are for J2000
Event circumstances last updated at 2021/10/16 01:20:02 UT
Marc W. Buie, Southwest Research Institute