Event between (15810) Arawn and star GA0680:34370641 with event index number of 148618
Geocentric closest approach at 2018/09/04 04:04:38 UTC
J2000 position of star is 19:11:27.9 -20:05:40
Equinox of date position of star is 19:12:33.2 -20:03:46
Stellar brightness G=17.0,
use SENSEUP=128
Star is 159 degrees from the moon.
Moon is 38% illuminated.
TNO apparent brightness V=23.3
[RECON map]
TNO is 35.7 AU from the Sun
and 35.1 AU from the Earth.
The TNO is moving 11.6
km/sec on the sky relative to the star, or,
1.6 arcsec/hr.
The 1-sigma error in the time of the event is 369 seconds.
The 1-sigma cross-track error in the shadow position is
1694 km.
The sky-plane scale is
25447.3 km/arcsec.
The TNO has an absolute magnitude Hv=7.7
Diameter=173.8 km assuming a 5% albedo -- 14.9 sec chord
Diameter=70.9 km assuming a 30% albedo -- 6.1 sec chord
Dynamical classification is 3:2E
Star training set for 15810, (2018/09/04 04:05UT) Object RA Dec mag sep mel Antares 16:30:33.3 -26:28:19 0.9 37.60 163 Nunki 18:56:25.3 -26:16:19 2.0 7.23 162 PPM 235581 19:10:54.2 -19:46:22 6.4 0.49 159 PPM 269430 19:12:25.5 -20:18:55 8.3 0.26 159 PPM 235606 19:12:03.3 -19:56:29 8.8 0.17 159 15810 19:12:34.0 -20:03:44 17.0 158 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
2.4 sigma about the mid-time.
The median site spacing is 14.1 km
RECON observability=0.8 and success probability=0.7%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Penticton | 04:03:06 | -13.9 | AT | Down | 20.3 | 176.6 | Low | 03:48:06 - 04:18:06 | 6450 |
| Oroville | 04:03:06 | -14.3 | AT | Down | 20.9 | 176.7 | Low | 03:48:06 - 04:18:06 | 6426 |
| Tonasket | 04:03:06 | -14.4 | AT | Down | 21.1 | 176.7 | Low | 03:48:06 - 04:18:06 | 6418 |
| Okanogan | 04:03:08 | -14.5 | AT | Down | 21.5 | 176.5 | Low | 03:48:08 - 04:18:08 | 6407 |
| Brewster | 04:03:09 | -14.5 | AT | Down | 21.7 | 176.3 | Low | 03:48:09 - 04:18:09 | 6399 |
| Manson/Chelan | 04:03:12 | -14.4 | AT | Down | 21.9 | 176.0 | Low | 03:48:12 - 04:18:12 | 6397 |
| Entiat | 04:03:11 | -14.4 | AT | Down | 22.1 | 175.9 | Low | 03:48:11 - 04:18:11 | 6389 |
| Wenatchee | 04:03:13 | -14.5 | AT | Down | 22.4 | 175.8 | Low | 03:48:13 - 04:18:13 | 6380 |
| Ellensburg | 04:03:15 | -14.6 | AT | Down | 22.8 | 175.6 | Low | 03:48:15 - 04:18:15 | 6367 |
| Yakima | 04:03:15 | -14.7 | AT | Down | 23.2 | 175.5 | Low | 03:48:15 - 04:18:15 | 6350 |
| Toppenish/White Swan | 04:03:16 | -14.9 | AT | Down | 23.4 | 175.7 | Low | 03:48:16 - 04:18:16 | 6339 |
| Goldendale | 04:03:17 | -14.9 | AT | Down | 24.0 | 175.2 | Low | 03:48:17 - 04:18:17 | 6322 |
| The Dalles | 04:03:21 | -14.8 | AT | Down | 24.2 | 174.9 | Low | 03:48:21 - 04:18:21 | 6318 |
| Pasco | 04:03:06 | -15.8 | AT | Down | 23.6 | 176.9 | Low | 03:48:06 - 04:18:06 | 6314 |
| George/Umatilla | 04:03:08 | -15.8 | AT | Down | 23.9 | 176.7 | Low | 03:48:08 - 04:18:08 | 6303 |
| PNWRO | 04:03:07 | -16.0 | AT | Down | 23.9 | 177.2 | Low | 03:48:07 - 04:18:07 | 6300 |
| Maupin | 04:03:20 | -15.1 | AT | Down | 24.6 | 175.0 | Low | 03:48:20 - 04:18:20 | 6298 |
| Madras/Culver | 04:03:23 | -15.3 | AT | Down | 25.1 | 174.9 | Low | 03:48:23 - 04:18:23 | 6274 |
| Sisters | 04:03:26 | -15.2 | AT | Down | 25.4 | 174.4 | Low | 03:48:26 - 04:18:26 | 6266 |
| Redmond | 04:03:23 | -15.4 | AT | Down | 25.5 | 174.8 | Low | 03:48:23 - 04:18:23 | 6259 |
| Bend | 04:03:24 | -15.5 | AT | Down | 25.7 | 174.7 | Low | 03:48:24 - 04:18:24 | 6251 |
| Oregon Observatory | 04:03:24 | -15.4 | AT | Down | 25.8 | 174.5 | Low | 03:48:24 - 04:18:24 | 6245 |
| La Pine/Gilchrist | 04:03:25 | -15.5 | AT | Down | 26.0 | 174.5 | Low | 03:48:25 - 04:18:25 | 6237 |
| North Lake | 04:03:22 | -16.1 | AT | Down | 26.5 | 175.1 | Low | 03:48:22 - 04:18:22 | 6207 |
| Chiloquin | 04:03:29 | -15.8 | AT | Down | 27.1 | 174.1 | Low | 03:48:29 - 04:18:29 | 6190 |
| Paisley | 04:03:23 | -16.6 | AT | Down | 27.1 | 175.4 | Low | 03:48:23 - 04:18:23 | 6175 |
| Klamath Falls | 04:03:30 | -16.0 | AT | Down | 27.5 | 174.1 | Low | 03:48:30 - 04:18:30 | 6172 |
| Tulelake | 04:03:28 | -16.3 | AT | Down | 27.8 | 174.4 | Low | 03:48:28 - 04:18:28 | 6154 |
| Lakeview | 04:03:22 | -16.9 | AT | Down | 27.6 | 175.6 | Low | 03:48:22 - 04:18:22 | 6147 |
| Cedarville | 04:03:22 | -17.3 | AT | Down | 28.3 | 175.8 | Low | 03:48:22 - 04:18:22 | 6111 |
| Fall River/Burney | 04:03:29 | -16.7 | AT | Down | 28.7 | 174.5 | Low | 03:48:29 - 04:18:29 | 6107 |
| Susanville | 04:03:27 | -17.5 | AT | Down | 29.4 | 175.2 | Low | 03:48:27 - 04:18:27 | 6062 |
| Greenville | 04:03:27 | -17.4 | AT | Down | 29.6 | 174.9 | Low | 03:48:27 - 04:18:27 | 6053 |
| Gimple | 04:03:28 | -17.5 | AT | Down | 29.6 | 175.0 | Low | 03:48:28 - 04:18:28 | 6051 |
| Quincy | 04:03:27 | -17.5 | AT | Down | 29.8 | 174.9 | Low | 03:48:27 - 04:18:27 | 6042 |
| Portola | 04:03:27 | -17.9 | AT | Down | 30.0 | 175.4 | Low | 03:48:27 - 04:18:27 | 6027 |
| Reno | 04:03:22 | -18.5 | Dark | Down | 30.3 | 176.1 | Up | 03:48:22 - 04:18:22 | 6002 |
| Carson City | 04:03:20 | -18.6 | Dark | Down | 30.6 | 176.1 | Up | 03:48:20 - 04:18:20 | 5982 |
| Gardnerville | 04:03:23 | -18.8 | Dark | Down | 30.9 | 176.1 | Up | 03:48:23 - 04:18:23 | 5968 |
| Yerington | 04:03:17 | -19.2 | Dark | Down | 30.8 | 176.7 | Up | 03:48:17 - 04:18:17 | 5961 |
| Hawthorne | 04:03:15 | -19.7 | Dark | Down | 31.3 | 177.3 | Up | 03:48:15 - 04:18:15 | 5925 |
| Lee Vining | 04:03:19 | -19.7 | Dark | Down | 31.9 | 176.8 | Up | 03:48:19 - 04:18:19 | 5903 |
| Tonopah | 04:03:04 | -20.9 | Dark | Down | 31.8 | 178.8 | Up | 03:48:04 - 04:18:04 | 5873 |
| Bishop | 04:03:13 | -20.4 | Dark | Down | 32.5 | 177.5 | Up | 03:48:13 - 04:18:13 | 5855 |
| Lone Pine | 04:03:14 | -21.0 | Dark | Down | 33.3 | 177.9 | Up | 03:48:14 - 04:18:14 | 5805 |
| Beatty | 04:03:04 | -21.8 | Dark | Down | 33.0 | 179.3 | Up | 03:48:04 - 04:18:04 | 5797 |
| CPSLO | 04:03:34 | -19.7 | Dark | Down | 34.4 | 175.0 | Up | 03:48:34 - 04:18:34 | 5775 |
| Indian Springs | 04:02:56 | -22.7 | Dark | Down | 33.3 | 180.5 | Up | 03:47:56 - 04:17:56 | 5757 |
| Niwot | 04:01:40 | -27.4 | Dark | Down | 29.0 | 191.4 | Low | 03:46:40 - 04:16:40 | 5732 |
| Henderson | 04:02:51 | -23.4 | Dark | Down | 33.9 | 181.2 | Up | 03:47:51 - 04:17:51 | 5711 |
| Searchlight/Boulder City | 04:02:52 | -23.7 | Dark | Down | 34.4 | 181.3 | Up | 03:47:52 - 04:17:52 | 5674 |
| Wildwood | 04:03:20 | -21.7 | Dark | Down | 35.8 | 177.2 | Up | 03:48:20 - 04:18:20 | 5662 |
| Patrick | 04:02:44 | -24.5 | Dark | Down | 34.5 | 182.5 | Up | 03:47:44 - 04:17:44 | 5649 |
| Laughlin/Bullhead City | 04:02:49 | -24.1 | Dark | Down | 34.7 | 181.7 | Up | 03:47:49 - 04:17:49 | 5649 |
| Kingman/Dolan Springs | 04:02:45 | -24.4 | Dark | Down | 34.7 | 182.3 | Up | 03:47:45 - 04:17:45 | 5639 |
| Mohave Valley | 04:02:49 | -24.2 | Dark | Down | 35.0 | 181.7 | Up | 03:47:49 - 04:17:49 | 5632 |
| DCO | 04:02:41 | -25.1 | Dark | Down | 34.7 | 183.3 | Up | 03:47:41 - 04:17:41 | 5615 |
| Idyllwild | 04:03:07 | -23.3 | Dark | Down | 36.2 | 179.3 | Up | 03:48:07 - 04:18:07 | 5603 |
| Lake Havasu City | 04:02:49 | -24.6 | Dark | Down | 35.4 | 182.0 | Up | 03:47:49 - 04:17:49 | 5601 |
| Parker | 04:02:48 | -24.8 | Dark | Down | 35.7 | 182.1 | Up | 03:47:48 - 04:17:48 | 5578 |
| Blythe | 04:02:52 | -24.8 | Dark | Down | 36.3 | 181.7 | Up | 03:47:52 - 04:17:52 | 5551 |
| Calipatria | 04:02:59 | -24.4 | Dark | Down | 36.8 | 180.7 | Up | 03:47:59 - 04:17:59 | 5539 |
| Yuma | 04:02:53 | -25.3 | Dark | Down | 37.2 | 181.7 | Up | 03:47:53 - 04:17:53 | 5492 |
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 15810, (2018/09/04 04:05UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 37.60 163 Nunki 18:55:15.9 -26:17:49 2.0 7.23 162 PPM 235581 19:09:48.2 -19:48:15 6.4 0.49 159 PPM 269430 19:11:19.3 -20:20:50 8.3 0.26 159 PPM 235606 19:10:57.2 -19:58:24 8.8 0.17 159 15810 19:11:27.9 -20:05:40 17.0 159 Positions are for J2000
Event circumstances last updated at 2018/06/05 16:23:28 UT
Marc W. Buie, Southwest Research Institute