Event between (149349) 02VA131 and star UC4-536-005733 with event index number of 94638
Geocentric closest approach at 2017/12/11 03:45:24 UTC
J2000 position of star is 03:14:31.4 +17:05:47
Equinox of date position of star is 03:15:32.1 +17:09:44
Stellar brightness R=15.4,
use SENSEUP=128
Star is 129 degrees from the moon.
Moon is 41% illuminated.
TNO apparent brightness V=22.2
[RECON map]
TNO is 36.5 AU from the Sun
and 35.6 AU from the Earth.
The TNO is moving 21.5
km/sec on the sky relative to the star, or,
3.0 arcsec/hr.
The 1-sigma error in the time of the event is 217 seconds.
The 1-sigma cross-track error in the shadow position is
1552 km.
The sky-plane scale is
25836.7 km/arcsec.
The TNO has an absolute magnitude Hv=6.5
Diameter=302.0 km assuming a 5% albedo -- 14.1 sec chord
Diameter=123.3 km assuming a 30% albedo -- 5.7 sec chord
Dynamical classification is 5:3EE
Star training set for 149349, (2017/12/11 03:45UT) Object RA Dec mag sep mel Aldebaran 04:36:57.1 +16:32:38 0.8 19.48 110 Menkar 03:03:13.2 +04:09:33 2.5 13.35 135 57Del Ari 03:12:39.5 +19:47:36 4.3 2.72 128 PPM 118904 03:13:16.9 +17:22:03 8.5 0.58 129 PPM 118915 03:14:00.8 +17:11:54 8.7 0.37 129 PPM 118949 03:16:06.5 +17:07:54 10.3 0.14 128 149349 03:15:32.1 +17:09:44 15.4 128 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
4.2 sigma about the mid-time.
The median site spacing is 17.7 km
RECON observability=1.0 and success probability=10.7%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Oroville | 03:46:16 | -35.9 | Dark | Down | 49.2 | 130.2 | Up | 03:31:16 - 04:01:16 | -2306 |
| Tonasket | 03:46:17 | -35.9 | Dark | Down | 49.4 | 130.0 | Up | 03:31:17 - 04:01:17 | -2324 |
| Okanogan | 03:46:18 | -35.9 | Dark | Down | 49.5 | 129.5 | Up | 03:31:18 - 04:01:18 | -2345 |
| Brewster | 03:46:20 | -35.7 | Dark | Down | 49.6 | 129.0 | Up | 03:31:20 - 04:01:20 | -2360 |
| Manson/Chelan | 03:46:20 | -35.5 | Dark | Down | 49.5 | 128.4 | Up | 03:31:20 - 04:01:20 | -2365 |
| Entiat | 03:46:20 | -35.5 | Dark | Down | 49.6 | 128.1 | Up | 03:31:20 - 04:01:20 | -2380 |
| Wenatchee | 03:46:20 | -35.4 | Dark | Down | 49.7 | 127.8 | Up | 03:31:20 - 04:01:20 | -2398 |
| Ellensburg | 03:46:20 | -35.3 | Dark | Down | 49.9 | 127.1 | Up | 03:31:20 - 04:01:20 | -2424 |
| Yakima | 03:46:20 | -35.3 | Dark | Down | 50.1 | 126.7 | Up | 03:31:20 - 04:01:20 | -2457 |
| Toppenish/White Swan | 03:46:20 | -35.5 | Dark | Down | 50.3 | 126.7 | Up | 03:31:20 - 04:01:20 | -2479 |
| Goldendale | 03:46:20 | -35.2 | Dark | Down | 50.4 | 125.6 | Up | 03:31:20 - 04:01:20 | -2513 |
| Pasco | 03:46:20 | -36.3 | Dark | Down | 51.1 | 128.1 | Up | 03:31:20 - 04:01:20 | -2523 |
| The Dalles | 03:46:20 | -34.9 | Dark | Down | 50.3 | 125.0 | Up | 03:31:20 - 04:01:20 | -2523 |
| George/Umatilla | 03:46:20 | -36.2 | Dark | Down | 51.2 | 127.5 | Up | 03:31:20 - 04:01:20 | -2544 |
| PNWRO | 03:46:20 | -36.5 | Dark | Down | 51.4 | 128.2 | Up | 03:31:20 - 04:01:20 | -2549 |
| Maupin | 03:46:20 | -35.0 | Dark | Down | 50.6 | 124.7 | Up | 03:31:20 - 04:01:20 | -2561 |
| Madras/Culver | 03:46:34 | -35.0 | Dark | Down | 51.0 | 124.1 | Up | 03:31:34 - 04:01:34 | -2590 |
| Sisters | 03:46:36 | -34.7 | Dark | Down | 50.9 | 123.3 | Up | 03:31:36 - 04:01:36 | -2603 |
| Redmond | 03:46:36 | -35.0 | Dark | Down | 51.1 | 123.7 | Up | 03:31:36 - 04:01:36 | -2617 |
| Bend | 03:46:36 | -34.9 | Dark | Down | 51.2 | 123.3 | Up | 03:31:36 - 04:01:36 | -2630 |
| Oregon Observatory | 03:46:37 | -34.8 | Dark | Down | 51.2 | 123.0 | Up | 03:31:37 - 04:01:37 | -2639 |
| La Pine/Gilchrist | 03:46:38 | -34.8 | Dark | Down | 51.3 | 122.7 | Up | 03:31:38 - 04:01:38 | -2654 |
| North Lake | 03:46:38 | -35.2 | Dark | Down | 51.9 | 123.0 | Up | 03:31:38 - 04:01:38 | -2708 |
| Chiloquin | 03:46:43 | -34.5 | Dark | Down | 51.6 | 121.1 | Up | 03:31:43 - 04:01:43 | -2733 |
| Klamath Falls | 03:46:43 | -34.6 | Dark | Down | 51.9 | 120.9 | Up | 03:31:43 - 04:01:43 | -2763 |
| Paisley | 03:46:39 | -35.5 | Dark | Down | 52.4 | 122.8 | Up | 03:31:39 - 04:01:39 | -2764 |
| Tulelake | 03:46:43 | -34.8 | Dark | Down | 52.2 | 120.9 | Up | 03:31:43 - 04:01:43 | -2795 |
| Lakeview | 03:46:39 | -35.7 | Dark | Down | 52.8 | 122.5 | Up | 03:31:39 - 04:01:39 | -2812 |
| Cedarville | 03:46:41 | -35.8 | Dark | Down | 53.2 | 122.0 | Up | 03:31:41 - 04:01:41 | -2872 |
| Fall River/Burney | 03:46:46 | -34.9 | Dark | Down | 52.7 | 120.0 | Up | 03:31:46 - 04:01:46 | -2873 |
| Susanville | 03:46:46 | -35.4 | Dark | Down | 53.5 | 120.1 | Up | 03:31:46 - 04:01:46 | -2950 |
| Greenville | 03:46:47 | -35.2 | Dark | Down | 53.5 | 119.5 | Up | 03:31:47 - 04:01:47 | -2963 |
| Gimple | 03:46:47 | -35.3 | Dark | Down | 53.5 | 119.6 | Up | 03:31:47 - 04:01:47 | -2966 |
| Quincy | 03:46:48 | -35.2 | Dark | Down | 53.6 | 119.3 | Up | 03:31:48 - 04:01:48 | -2980 |
| Portola | 03:46:46 | -35.6 | Dark | Down | 53.9 | 119.7 | Up | 03:31:46 - 04:01:46 | -3007 |
| Reno | 03:46:46 | -36.0 | Dark | Down | 54.5 | 120.1 | Up | 03:31:46 - 04:01:46 | -3051 |
| Carson City | 03:46:46 | -36.1 | Dark | Down | 54.7 | 119.7 | Up | 03:31:46 - 04:01:46 | -3082 |
| Gardnerville | 03:46:47 | -36.1 | Dark | Down | 54.9 | 119.4 | Up | 03:31:47 - 04:01:47 | -3105 |
| Yerington | 03:46:45 | -36.5 | Dark | Down | 55.2 | 120.2 | Up | 03:31:45 - 04:01:45 | -3120 |
| Hawthorne | 03:46:44 | -36.9 | Dark | Down | 55.8 | 120.2 | Up | 03:31:44 - 04:01:44 | -3178 |
| Lee Vining | 03:46:48 | -36.5 | Dark | Down | 55.8 | 118.9 | Up | 03:31:48 - 04:01:48 | -3211 |
| Tonopah | 03:46:41 | -38.0 | Dark | Down | 57.0 | 121.3 | Up | 03:31:41 - 04:01:41 | -3266 |
| Bishop | 03:46:47 | -37.1 | Dark | Down | 56.6 | 119.0 | Up | 03:31:47 - 04:01:47 | -3288 |
| Lone Pine | 03:46:48 | -37.3 | Dark | Down | 57.2 | 118.4 | Up | 03:31:48 - 04:01:48 | -3366 |
| Beatty | 03:46:43 | -38.4 | Dark | Down | 57.9 | 120.4 | Up | 03:31:43 - 04:01:43 | -3384 |
| CPSLO | 03:47:01 | -35.2 | Dark | Down | 55.9 | 113.8 | Up | 03:32:01 - 04:02:01 | -3392 |
| Indian Springs | 03:46:40 | -39.2 | Dark | Down | 58.8 | 121.3 | Up | 03:31:40 - 04:01:40 | -3449 |
| Niwot | 03:45:56 | -47.1 | Dark | Down | 62.6 | 142.0 | Up | 03:30:56 - 04:00:56 | -3461 |
| Henderson | 03:46:39 | -39.8 | Dark | Down | 59.6 | 121.4 | Up | 03:31:39 - 04:01:39 | -3521 |
| Wildwood | 03:46:57 | -36.8 | Dark | Down | 57.9 | 114.3 | Up | 03:31:57 - 04:01:57 | -3574 |
| Searchlight/Boulder City | 03:46:41 | -39.8 | Dark | Down | 59.9 | 120.6 | Up | 03:31:41 - 04:01:41 | -3575 |
| Laughlin/Bullhead City | 03:46:40 | -40.1 | Dark | Down | 60.3 | 120.6 | Up | 03:31:40 - 04:01:40 | -3614 |
| Patrick | 03:46:37 | -40.6 | Dark | Down | 60.7 | 121.9 | Up | 03:31:37 - 04:01:37 | -3616 |
| Kingman/Dolan Springs | 03:46:39 | -40.5 | Dark | Down | 60.7 | 121.3 | Up | 03:31:39 - 04:01:39 | -3630 |
| Mohave Valley | 03:46:41 | -40.1 | Dark | Down | 60.5 | 120.2 | Up | 03:31:41 - 04:01:41 | -3640 |
| DCO | 03:46:36 | -41.2 | Dark | Down | 61.3 | 122.4 | Up | 03:31:36 - 04:01:36 | -3668 |
| Idyllwild | 03:46:52 | -38.3 | Dark | Down | 59.5 | 115.9 | Up | 03:31:52 - 04:01:52 | -3672 |
| Lake Havasu City | 03:46:41 | -40.3 | Dark | Down | 60.8 | 119.9 | Up | 03:31:41 - 04:01:41 | -3685 |
| Parker | 03:46:42 | -40.3 | Dark | Down | 61.0 | 119.4 | Up | 03:31:42 - 04:01:42 | -3719 |
| Blythe | 03:46:45 | -40.0 | Dark | Down | 61.1 | 118.2 | Up | 03:31:45 - 04:01:45 | -3757 |
| Calipatria | 03:46:49 | -39.2 | Dark | Down | 60.6 | 116.3 | Up | 03:31:49 - 04:01:49 | -3770 |
| Yuma | 03:46:47 | -39.9 | Dark | Down | 61.5 | 116.7 | Up | 03:31:47 - 04:01:47 | -3842 |
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 149349, (2017/12/11 03:45UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:30 0.8 19.48 110 Menkar 03:02:16.8 +04:05:22 2.5 13.35 135 57Del Ari 03:11:37.9 +19:43:36 4.3 2.72 128 PPM 118904 03:12:16.1 +17:18:03 8.5 0.58 129 PPM 118915 03:13:00.1 +17:07:55 8.7 0.37 129 PPM 118949 03:15:05.8 +17:03:57 10.3 0.14 128 149349 03:14:31.4 +17:05:47 15.4 128 Positions are for J2000
Event circumstances last updated at 2017/12/02 17:05:27 UT
Marc W. Buie, Southwest Research Institute