Event between (174567) Varda and star GA0860:05470070 with event index number of 154895
Geocentric closest approach at 2018/09/10 03:37:45 UTC
J2000 position of star is 17:18:25.1 -02:05:14
Equinox of date position of star is 17:19:23.3 -02:06:21
Stellar brightness G=14.7,
use SENSEUP=128
Star is 85 degrees from the moon.
Moon is 0% illuminated.
TNO apparent brightness V=20.0
[RECON map]
TNO is 46.7 AU from the Sun
and 46.6 AU from the Earth.
The TNO is moving 10.9
km/sec on the sky relative to the star, or,
1.2 arcsec/hr.
The 1-sigma error in the time of the event is 158 seconds.
The 1-sigma cross-track error in the shadow position is
1913 km.
The sky-plane scale is
33825.4 km/arcsec.
The TNO has an absolute magnitude Hv=3.2
Diameter=1380.4 km assuming a 5% albedo -- 127.1 sec chord
Diameter=563.6 km assuming a 30% albedo -- 51.9 sec chord
Dynamical classification is SCATEXTD
Star training set for 174567, (2018/09/10 03:38UT) Object RA Dec mag sep mel Antares 16:30:33.4 -26:28:19 0.9 27.04 77 60Bet Oph 17:44:23.8 +04:33:39 2.8 9.14 90 PPM 180059 17:26:56.2 -01:40:00 6.4 1.94 87 PPM 180033 17:19:37.3 -01:31:41 8.4 0.58 85 PPM 200551 17:20:12.5 -02:36:55 9.8 0.55 85 PPM 180032 17:19:34.4 -01:56:46 10.1 0.17 85 174567 17:19:23.5 -02:06:21 14.7 85 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 19.3 km
RECON observability=0.4 and success probability=9.8%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Niwot | 03:32:43 | -24.9 | Dark | Down | 35.6 | 228.5 | Up | 03:19:02 - 03:46:24 | 3237 |
| DCO | 03:33:09 | -21.6 | Dark | Down | 43.6 | 223.1 | Up | 03:19:28 - 03:46:50 | 2742 |
| Patrick | 03:33:06 | -20.9 | Dark | Down | 43.8 | 222.0 | Up | 03:19:25 - 03:46:47 | 2685 |
| Kingman/Dolan Springs | 03:33:06 | -20.9 | Dark | Down | 44.0 | 221.9 | Up | 03:19:25 - 03:46:47 | 2672 |
| Parker | 03:33:16 | -21.1 | Dark | Down | 44.9 | 222.4 | Up | 03:19:35 - 03:46:57 | 2661 |
| Lake Havasu City | 03:33:11 | -21.0 | Dark | Down | 44.7 | 222.1 | Up | 03:19:30 - 03:46:52 | 2657 |
| Yuma | 03:33:25 | -21.4 | Dark | Down | 46.2 | 223.1 | Up | 03:19:44 - 03:47:06 | 2642 |
| Blythe | 03:33:18 | -21.1 | Dark | Down | 45.5 | 222.4 | Up | 03:19:37 - 03:46:59 | 2641 |
| Mohave Valley | 03:33:09 | -20.6 | Dark | Down | 44.5 | 221.6 | Up | 03:19:28 - 03:46:50 | 2635 |
| Laughlin/Bullhead City | 03:33:06 | -20.5 | Dark | Down | 44.3 | 221.4 | Up | 03:19:25 - 03:46:47 | 2632 |
| Searchlight/Boulder City | 03:33:02 | -20.1 | Dark | Down | 44.3 | 220.7 | Up | 03:19:21 - 03:46:43 | 2604 |
| Henderson | 03:32:58 | -19.8 | Dark | Down | 43.9 | 220.3 | Up | 03:19:17 - 03:46:39 | 2595 |
| Calipatria | 03:33:23 | -20.6 | Dark | Down | 46.3 | 221.7 | Up | 03:19:42 - 03:47:04 | 2569 |
| Indian Springs | 03:32:50 | -19.1 | Dark | Down | 43.9 | 219.1 | Up | 03:19:09 - 03:46:31 | 2537 |
| Idyllwild | 03:33:13 | -19.4 | Dark | Down | 46.6 | 219.8 | Up | 03:19:32 - 03:46:54 | 2471 |
| Beatty | 03:32:48 | -18.2 | Dark | Down | 44.2 | 217.6 | Up | 03:19:07 - 03:46:29 | 2452 |
| Tonopah | 03:32:36 | -17.4 | AT | Down | 43.5 | 216.3 | Up | 03:18:55 - 03:46:17 | 2409 |
| Lone Pine | 03:32:47 | -17.3 | AT | Down | 45.0 | 216.1 | Up | 03:19:06 - 03:46:28 | 2352 |
| Bishop | 03:32:40 | -16.7 | AT | Down | 44.6 | 215.3 | Up | 03:18:59 - 03:46:21 | 2322 |
| Wildwood | 03:33:04 | -17.8 | AT | Down | 47.3 | 217.1 | Up | 03:19:23 - 03:46:45 | 2317 |
| Hawthorne | 03:32:30 | -16.1 | AT | Down | 43.7 | 214.3 | Up | 03:18:49 - 03:46:11 | 2298 |
| Lee Vining | 03:32:34 | -16.0 | AT | Down | 44.4 | 214.0 | Up | 03:18:53 - 03:46:15 | 2263 |
| Yerington | 03:32:23 | -15.6 | AT | Down | 43.6 | 213.3 | Up | 03:18:42 - 03:46:04 | 2255 |
| PNWRO | 03:31:31 | -13.1 | AT | Down | 37.6 | 210.2 | Up | 03:17:50 - 03:45:12 | 2213 |
| Gardnerville | 03:32:22 | -15.2 | AT | Down | 43.9 | 212.6 | Up | 03:18:41 - 03:46:03 | 2209 |
| Carson City | 03:32:21 | -15.0 | AT | Down | 43.7 | 212.4 | Up | 03:18:40 - 03:46:02 | 2205 |
| Reno | 03:32:19 | -14.9 | AT | Down | 43.4 | 212.2 | Up | 03:18:38 - 03:46:00 | 2201 |
| Pasco | 03:31:27 | -12.9 | AT | Down | 37.5 | 209.8 | Up | 03:17:46 - 03:45:08 | 2195 |
| George/Umatilla | 03:31:31 | -12.9 | AT | Down | 37.8 | 209.7 | Up | 03:17:50 - 03:45:12 | 2184 |
| Cedarville | 03:32:03 | -13.9 | AT | Down | 41.9 | 210.7 | Up | 03:18:22 - 03:45:44 | 2162 |
| Portola | 03:32:17 | -14.3 | AT | Down | 43.5 | 211.2 | Up | 03:18:36 - 03:45:58 | 2150 |
| CPSLO | 03:32:52 | -15.7 | AT | Down | 47.3 | 213.6 | Up | 03:19:11 - 03:46:33 | 2147 |
| Lakeview | 03:31:57 | -13.6 | AT | Down | 41.4 | 210.2 | Up | 03:18:16 - 03:45:38 | 2145 |
| Tonasket | 03:31:09 | -11.7 | NT | Down | 35.5 | 208.5 | Up | 03:17:28 - 03:44:50 | 2144 |
| Oroville | 03:31:07 | -11.6 | NT | Down | 35.3 | 208.4 | Up | 03:17:26 - 03:44:48 | 2141 |
| Okanogan | 03:31:10 | -11.7 | NT | Down | 35.8 | 208.4 | Up | 03:17:29 - 03:44:51 | 2139 |
| Susanville | 03:32:10 | -14.0 | AT | Down | 43.0 | 210.7 | Up | 03:18:29 - 03:45:51 | 2132 |
| Brewster | 03:31:14 | -11.7 | NT | Down | 36.1 | 208.3 | Up | 03:17:33 - 03:44:55 | 2128 |
| Paisley | 03:31:52 | -13.2 | AT | Down | 41.0 | 209.7 | Up | 03:18:11 - 03:45:33 | 2127 |
| Penticton | 03:31:05 | -11.3 | NT | Down | 34.8 | 208.0 | Up | 03:17:24 - 03:44:46 | 2125 |
| Gimple | 03:32:13 | -13.9 | AT | Down | 43.3 | 210.5 | Up | 03:18:32 - 03:45:54 | 2118 |
| Quincy | 03:32:11 | -13.9 | AT | Down | 43.5 | 210.5 | Up | 03:18:30 - 03:45:52 | 2112 |
| Greenville | 03:32:11 | -13.9 | AT | Down | 43.4 | 210.4 | Up | 03:18:30 - 03:45:52 | 2111 |
| Manson/Chelan | 03:31:10 | -11.6 | NT | Down | 36.4 | 207.9 | Up | 03:17:29 - 03:44:51 | 2107 |
| Toppenish/White Swan | 03:31:25 | -12.0 | NT | Down | 37.8 | 208.3 | Up | 03:17:44 - 03:45:06 | 2107 |
| Entiat | 03:31:15 | -11.6 | NT | Down | 36.6 | 207.9 | Up | 03:17:34 - 03:44:56 | 2104 |
| Wenatchee | 03:31:18 | -11.7 | NT | Down | 36.9 | 207.9 | Up | 03:17:37 - 03:44:59 | 2100 |
| North Lake | 03:31:48 | -12.8 | AT | Down | 40.7 | 209.0 | Up | 03:18:07 - 03:45:29 | 2097 |
| Yakima | 03:31:24 | -11.8 | NT | Down | 37.7 | 208.0 | Up | 03:17:43 - 03:45:05 | 2092 |
| Ellensburg | 03:31:20 | -11.7 | NT | Down | 37.3 | 207.8 | Up | 03:17:39 - 03:45:01 | 2089 |
| Goldendale | 03:31:27 | -11.9 | NT | Down | 38.4 | 208.0 | Up | 03:17:46 - 03:45:08 | 2082 |
| Fall River/Burney | 03:32:00 | -13.2 | AT | Down | 42.8 | 209.4 | Up | 03:18:19 - 03:45:41 | 2073 |
| Madras/Culver | 03:31:37 | -12.1 | AT | Down | 39.6 | 208.1 | Up | 03:17:56 - 03:45:18 | 2071 |
| Redmond | 03:31:38 | -12.2 | AT | Down | 39.9 | 208.2 | Up | 03:17:57 - 03:45:19 | 2070 |
| Maupin | 03:31:34 | -12.0 | NT | Down | 39.1 | 207.9 | Up | 03:17:53 - 03:45:15 | 2069 |
| Tulelake | 03:31:56 | -12.8 | AT | Down | 42.0 | 208.9 | Up | 03:18:15 - 03:45:37 | 2062 |
| Bend | 03:31:40 | -12.2 | AT | Down | 40.1 | 208.1 | Up | 03:17:59 - 03:45:21 | 2061 |
| The Dalles | 03:31:29 | -11.8 | NT | Down | 38.7 | 207.6 | Up | 03:17:48 - 03:45:10 | 2058 |
| Oregon Observatory | 03:31:42 | -12.2 | AT | Down | 40.3 | 208.0 | Up | 03:18:01 - 03:45:23 | 2053 |
| La Pine/Gilchrist | 03:31:44 | -12.2 | AT | Down | 40.5 | 208.0 | Up | 03:18:03 - 03:45:25 | 2050 |
| Sisters | 03:31:38 | -12.0 | NT | Down | 40.0 | 207.7 | Up | 03:17:57 - 03:45:19 | 2041 |
| Klamath Falls | 03:31:54 | -12.5 | AT | Down | 41.9 | 208.4 | Up | 03:18:13 - 03:45:35 | 2038 |
| Chiloquin | 03:31:52 | -12.4 | AT | Down | 41.6 | 208.1 | Up | 03:18:11 - 03:45:33 | 2030 |
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, (2018/09/10 03:38UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 27.04 77 60Bet Oph 17:43:28.3 +04:34:05 2.8 9.14 90 PPM 180059 17:25:58.0 -01:39:05 6.4 1.94 87 PPM 180033 17:18:39.1 -01:30:35 8.4 0.58 85 PPM 200551 17:19:13.9 -02:35:49 9.8 0.55 85 PPM 180032 17:18:36.1 -01:55:40 10.1 0.17 85 174567 17:18:25.1 -02:05:14 14.7 85 Positions are for J2000
Event circumstances last updated at 2018/08/20 23:51:04 UT
Marc W. Buie, Southwest Research Institute