Event between (8405) Asbolus and star UC4-655-031483 with event index number of 338290
Geocentric closest approach at 2019/12/14 03:47:54 UTC
J2000 position of star is 05:14:07.9 +40:53:54
Equinox of date position of star is 05:15:27.2 +40:55:08
Stellar brightness R=12.6,
use SENSEUP=16
Star is 30 degrees from the moon.
Moon is 96% illuminated.
TNO apparent brightness V=22.6
[RECON map]
TNO is 22.6 AU from the Sun
and 21.7 AU from the Earth.
The TNO is moving 25.9
km/sec on the sky relative to the star, or,
5.9 arcsec/hr.
The 1-sigma error in the time of the event is 111 seconds.
The 1-sigma cross-track error in the shadow position is
1004 km.
The sky-plane scale is
15708.1 km/arcsec.
The TNO has an absolute magnitude Hv=9.1
Diameter=91.2 km assuming a 5% albedo -- 3.5 sec chord
Diameter=37.2 km assuming a 30% albedo -- 1.4 sec chord
Dynamical classification is CENTAURR
Star training set for 8405, (2019/12/14 03:48UT) Object RA Dec mag sep mel Aldebaran 04:37:04.1 +16:32:52 0.8 25.75 37 3Iot Aur 04:58:17.8 +33:11:45 2.7 8.45 31 PPM 047999 05:21:38.9 +41:06:16 5.5 1.17 29 PPM 047827 05:13:38.7 +41:14:16 7.7 0.48 31 PPM 047876 05:15:48.7 +41:07:05 9.1 0.20 30 8405 05:15:31.9 +40:55:13 12.6 30 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 21.2 km
RECON observability=1.0 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) |
| Summerland | 03:50:05 | -36.2 | Dark | Up | 49.2 | 79.6 | Up | 03:40:21 - 03:59:49 | 6418 |
| Kelowna | 03:50:04 | -36.4 | Dark | Up | 49.4 | 79.9 | Up | 03:40:20 - 03:59:48 | 6405 |
| Penticton | 03:50:05 | -36.3 | Dark | Up | 49.3 | 79.4 | Up | 03:40:21 - 03:59:49 | 6384 |
| Okanagan Falls | 03:50:05 | -36.3 | Dark | Up | 49.2 | 79.1 | Up | 03:40:21 - 03:59:49 | 6370 |
| Oliver | 03:50:06 | -36.4 | Dark | Up | 49.2 | 79.0 | Up | 03:40:22 - 03:59:50 | 6357 |
| Anarchist Mountain Observatory | 03:50:06 | -36.5 | Dark | Up | 49.3 | 78.9 | Up | 03:40:22 - 03:59:50 | 6335 |
| Oroville | 03:50:07 | -36.5 | Dark | Up | 49.2 | 78.8 | Up | 03:40:23 - 03:59:51 | 6332 |
| Tonasket | 03:50:07 | -36.5 | Dark | Up | 49.2 | 78.5 | Up | 03:40:23 - 03:59:51 | 6313 |
| Okanogan | 03:50:08 | -36.4 | Dark | Up | 49.0 | 78.0 | Up | 03:40:24 - 03:59:52 | 6293 |
| Brewster | 03:50:10 | -36.3 | Dark | Up | 48.9 | 77.6 | Up | 03:40:26 - 03:59:54 | 6281 |
| Manson/Chelan | 03:50:11 | -36.1 | Dark | Up | 48.6 | 77.2 | Up | 03:40:27 - 03:59:55 | 6280 |
| Entiat | 03:50:12 | -36.1 | Dark | Up | 48.5 | 76.9 | Up | 03:40:28 - 03:59:56 | 6266 |
| Wenatchee | 03:50:13 | -36.0 | Dark | Up | 48.4 | 76.6 | Up | 03:40:29 - 03:59:57 | 6250 |
| Ellensburg | 03:50:14 | -35.9 | Dark | Up | 48.1 | 76.0 | Up | 03:40:30 - 03:59:58 | 6228 |
| Yakima | 03:50:16 | -35.9 | Dark | Up | 48.0 | 75.5 | Up | 03:40:32 - 04:00:00 | 6196 |
| Toppenish/White Swan | 03:50:16 | -36.1 | Dark | Up | 48.1 | 75.4 | Up | 03:40:32 - 04:00:00 | 6171 |
| Goldendale | 03:50:18 | -35.8 | Dark | Up | 47.6 | 74.6 | Up | 03:40:34 - 04:00:02 | 6146 |
| The Dalles | 03:50:19 | -35.5 | Dark | Up | 47.3 | 74.2 | Up | 03:40:35 - 04:00:03 | 6145 |
| Maupin | 03:50:20 | -35.6 | Dark | Up | 47.3 | 73.8 | Up | 03:40:36 - 04:00:04 | 6107 |
| Pasco | 03:50:14 | -36.9 | Dark | Up | 48.9 | 75.9 | Up | 03:40:30 - 03:59:58 | 6103 |
| George/Umatilla | 03:50:16 | -36.8 | Dark | Up | 48.7 | 75.5 | Up | 03:40:32 - 04:00:00 | 6086 |
| PNWRO | 03:50:15 | -37.1 | Dark | Up | 49.0 | 75.8 | Up | 03:40:31 - 03:59:59 | 6072 |
| Madras/Culver | 03:50:21 | -35.6 | Dark | Up | 47.1 | 73.2 | Up | 03:40:37 - 04:00:05 | 6065 |
| Sisters | 03:50:23 | -35.3 | Dark | Up | 46.7 | 72.6 | Up | 03:40:39 - 04:00:07 | 6059 |
| Redmond | 03:50:23 | -35.6 | Dark | Up | 47.0 | 72.8 | Up | 03:40:39 - 04:00:07 | 6038 |
| Bend | 03:50:23 | -35.5 | Dark | Up | 46.8 | 72.5 | Up | 03:40:39 - 04:00:07 | 6028 |
| Oregon Observatory | 03:50:24 | -35.4 | Dark | Up | 46.7 | 72.3 | Up | 03:40:40 - 04:00:08 | 6020 |
| La Pine/Gilchrist | 03:50:25 | -35.4 | Dark | Up | 46.6 | 72.1 | Up | 03:40:41 - 04:00:09 | 6006 |
| North Lake | 03:50:25 | -35.8 | Dark | Up | 46.9 | 71.9 | Up | 03:40:41 - 04:00:09 | 5942 |
| Chiloquin | 03:50:29 | -35.1 | Dark | Up | 46.0 | 70.8 | Up | 03:40:45 - 04:00:13 | 5933 |
| Klamath Falls | 03:50:29 | -35.2 | Dark | Up | 45.9 | 70.5 | Up | 03:40:45 - 04:00:13 | 5901 |
| Paisley | 03:50:26 | -36.1 | Dark | Up | 46.9 | 71.5 | Up | 03:40:42 - 04:00:10 | 5879 |
| Tulelake | 03:50:30 | -35.4 | Dark | Up | 46.1 | 70.4 | Up | 03:40:46 - 04:00:14 | 5864 |
| Lakeview | 03:50:27 | -36.3 | Dark | Up | 46.9 | 71.1 | Up | 03:40:43 - 04:00:11 | 5828 |
| Fall River/Burney | 03:50:32 | -35.5 | Dark | Up | 45.8 | 69.5 | Up | 03:40:48 - 04:00:16 | 5785 |
| Cedarville | 03:50:29 | -36.4 | Dark | Up | 46.8 | 70.5 | Up | 03:40:45 - 04:00:13 | 5764 |
| Susanville | 03:50:33 | -36.0 | Dark | Up | 46.1 | 69.2 | Up | 03:40:49 - 04:00:17 | 5695 |
| Greenville | 03:50:34 | -35.8 | Dark | Up | 45.8 | 68.8 | Up | 03:40:50 - 04:00:18 | 5687 |
| Gimple | 03:50:34 | -35.9 | Dark | Up | 45.9 | 68.9 | Up | 03:40:50 - 04:00:18 | 5683 |
| Quincy | 03:50:34 | -35.8 | Dark | Up | 45.7 | 68.6 | Up | 03:40:50 - 04:00:18 | 5670 |
| Portola | 03:50:34 | -36.2 | Dark | Up | 46.0 | 68.7 | Up | 03:40:50 - 04:00:18 | 5635 |
| Reno | 03:50:34 | -36.7 | Dark | Up | 46.4 | 68.6 | Up | 03:40:50 - 04:00:18 | 5580 |
| Carson City | 03:50:34 | -36.7 | Dark | Up | 46.3 | 68.3 | Up | 03:40:50 - 04:00:18 | 5548 |
| Gardnerville | 03:50:35 | -36.7 | Dark | Up | 46.2 | 68.1 | Up | 03:40:51 - 04:00:19 | 5525 |
| Yerington | 03:50:34 | -37.1 | Dark | Up | 46.7 | 68.3 | Up | 03:40:50 - 04:00:18 | 5499 |
| Hawthorne | 03:50:34 | -37.6 | Dark | Up | 46.9 | 68.0 | Up | 03:40:50 - 04:00:18 | 5432 |
| Lee Vining | 03:50:36 | -37.2 | Dark | Up | 46.3 | 67.3 | Up | 03:40:52 - 04:00:20 | 5409 |
| Bishop | 03:50:37 | -37.7 | Dark | Up | 46.6 | 67.0 | Up | 03:40:53 - 04:00:21 | 5320 |
| Tonopah | 03:50:33 | -38.7 | Dark | Up | 47.7 | 68.0 | Up | 03:40:49 - 04:00:17 | 5320 |
| CPSLO | 03:50:45 | -35.8 | Dark | Up | 44.1 | 64.5 | Up | 03:41:01 - 04:00:29 | 5262 |
| Lone Pine | 03:50:38 | -38.0 | Dark | Up | 46.6 | 66.3 | Up | 03:40:54 - 04:00:22 | 5236 |
| Beatty | 03:50:34 | -39.0 | Dark | Up | 47.6 | 66.9 | Up | 03:40:50 - 04:00:18 | 5195 |
| Indian Springs | 03:50:34 | -39.9 | Dark | Up | 48.3 | 66.9 | Up | 03:40:50 - 04:00:18 | 5111 |
| Wildwood | 03:50:45 | -37.4 | Dark | Up | 45.1 | 63.9 | Up | 03:41:01 - 04:00:29 | 5045 |
| Henderson | 03:50:34 | -40.4 | Dark | Up | 48.6 | 66.5 | Up | 03:40:50 - 04:00:18 | 5028 |
| Searchlight/Boulder City | 03:50:34 | -40.4 | Dark | Up | 48.4 | 65.9 | Up | 03:40:50 - 04:00:18 | 4973 |
| Niwot | 03:50:04 | -47.7 | Dark | Up | 57.2 | 74.1 | Up | 03:40:20 - 03:59:48 | 4940 |
| Laughlin/Bullhead City | 03:50:34 | -40.7 | Dark | Up | 48.6 | 65.7 | Up | 03:40:50 - 04:00:18 | 4928 |
| Patrick | 03:50:33 | -41.3 | Dark | Up | 49.2 | 66.1 | Up | 03:40:49 - 04:00:17 | 4914 |
| Idyllwild | 03:50:42 | -38.9 | Dark | Up | 46.4 | 63.9 | Up | 03:40:58 - 04:00:26 | 4912 |
| Kingman/Dolan Springs | 03:50:34 | -41.1 | Dark | Up | 49.0 | 65.8 | Up | 03:40:50 - 04:00:18 | 4904 |
| Mohave Valley | 03:50:35 | -40.7 | Dark | Up | 48.4 | 65.4 | Up | 03:40:51 - 04:00:19 | 4904 |
| Lake Havasu City | 03:50:36 | -40.9 | Dark | Up | 48.5 | 65.0 | Up | 03:40:52 - 04:00:20 | 4855 |
| DCO | 03:50:32 | -41.9 | Dark | Up | 49.6 | 65.9 | Up | 03:40:48 - 04:00:16 | 4850 |
| Parker | 03:50:36 | -40.9 | Dark | Up | 48.3 | 64.7 | Up | 03:40:52 - 04:00:20 | 4821 |
| Calipatria | 03:50:41 | -39.9 | Dark | Up | 47.0 | 63.5 | Up | 03:40:57 - 04:00:25 | 4794 |
| Blythe | 03:50:38 | -40.7 | Dark | Up | 47.9 | 64.1 | Up | 03:40:54 - 04:00:22 | 4790 |
| Yuma | 03:50:40 | -40.6 | Dark | Up | 47.5 | 63.2 | Up | 03:40:56 - 04:00:24 | 4708 |
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 8405, (2019/12/14 03:48UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:30 0.8 25.75 37 3Iot Aur 04:56:59.6 +33:09:58 2.7 8.45 31 PPM 047999 05:20:14.6 +41:05:09 5.5 1.17 29 PPM 047827 05:12:14.5 +41:12:54 7.7 0.48 31 PPM 047876 05:14:24.6 +41:05:47 9.1 0.20 30 8405 05:14:07.9 +40:53:54 12.6 30 Positions are for J2000
Event circumstances last updated at 2018/11/05 21:20:35 UT
Marc W. Buie, Southwest Research Institute