Event between (281371) 08FC76 and star GDR2_84.530_16.094 with event index number of 155222
Geocentric closest approach at 2018/09/30 12:23:21 UTC
J2000 position of star is 05:38:07.2 +16:05:37
Equinox of date position of star is 05:39:10.8 +16:06:12
Stellar brightness G=15.5,
use SENSEUP=128
Star is 12 degrees from the moon.
Moon is 71% illuminated.
TNO apparent brightness V=20.2
[RECON map]
TNO is 11.3 AU from the Sun
and 11.0 AU from the Earth.
The TNO is moving 8.0
km/sec on the sky relative to the star, or,
3.6 arcsec/hr.
The 1-sigma error in the time of the event is 65 seconds.
The 1-sigma cross-track error in the shadow position is
658 km.
The sky-plane scale is
7976.7 km/arcsec.
The TNO has an absolute magnitude Hv=9.3
Diameter=83.2 km assuming a 5% albedo -- 10.4 sec chord
Diameter=34.0 km assuming a 30% albedo -- 4.2 sec chord
Dynamical classification is CENTAURR
Star training set for 281371, (2018/09/30 12:23UT) Object RA Dec mag sep mel Betelgeuse 05:56:11.2 +07:24:33 0.4 9.64 20 Bellatrix 05:26:08.2 +06:21:55 1.6 10.25 15 126 Tau 05:42:22.7 +16:32:31 4.6 0.88 13 PPM 121200 05:38:58.1 +15:55:33 8.3 0.19 12 281371 05:39:12.1 +16:06:12 15.5 12 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 5.9 km
RECON observability=1.0 and success probability=0.2%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Niwot | 12:18:30 | -8.0 | CT | Up | 65.7 | 189.7 | Up | 12:12:37 - 12:24:23 | -1812 |
| DCO | 12:19:15 | -14.6 | AT | Up | 70.7 | 169.3 | Up | 12:13:22 - 12:25:08 | -2605 |
| Patrick | 12:19:10 | -15.1 | AT | Up | 70.3 | 167.4 | Up | 12:13:17 - 12:25:03 | -2660 |
| Kingman/Dolan Springs | 12:19:10 | -15.3 | AT | Up | 70.5 | 166.7 | Up | 12:13:17 - 12:25:03 | -2683 |
| Oroville | 12:16:08 | -17.1 | AT | Up | 56.0 | 161.3 | Up | 12:10:15 - 12:22:01 | -2693 |
| Tonasket | 12:16:13 | -17.1 | AT | Up | 56.2 | 161.3 | Up | 12:10:20 - 12:22:06 | -2701 |
| Okanogan | 12:16:16 | -17.3 | AT | Up | 56.5 | 160.9 | Up | 12:10:23 - 12:22:09 | -2724 |
| Lake Havasu City | 12:19:21 | -15.6 | AT | Up | 71.1 | 165.6 | Up | 12:13:28 - 12:25:14 | -2725 |
| Laughlin/Bullhead City | 12:19:11 | -15.7 | AT | Up | 70.4 | 165.2 | Up | 12:13:18 - 12:25:04 | -2729 |
| Parker | 12:19:25 | -15.6 | AT | Up | 71.5 | 165.5 | Up | 12:13:32 - 12:25:18 | -2731 |
| Mohave Valley | 12:19:16 | -15.8 | AT | Up | 70.7 | 165.1 | Up | 12:13:23 - 12:25:09 | -2736 |
| Henderson | 12:18:59 | -16.0 | AT | Up | 69.4 | 164.6 | Up | 12:13:06 - 12:24:52 | -2742 |
| Brewster | 12:16:18 | -17.5 | AT | Up | 56.7 | 160.4 | Up | 12:10:25 - 12:22:11 | -2747 |
| Searchlight/Boulder City | 12:19:07 | -16.0 | AT | Up | 70.0 | 164.5 | Up | 12:13:14 - 12:25:00 | -2752 |
| PNWRO | 12:16:46 | -17.4 | AT | Up | 58.9 | 161.1 | Up | 12:10:53 - 12:22:39 | -2755 |
| Pasco | 12:16:42 | -17.5 | AT | Up | 58.6 | 160.8 | Up | 12:10:49 - 12:22:35 | -2763 |
| Blythe | 12:19:31 | -15.9 | AT | Up | 71.9 | 164.2 | Up | 12:13:38 - 12:25:24 | -2772 |
| Manson/Chelan | 12:16:20 | -17.8 | AT | Up | 56.9 | 159.7 | Up | 12:10:27 - 12:22:13 | -2781 |
| Indian Springs | 12:18:50 | -16.5 | AT | Up | 68.8 | 163.1 | Up | 12:12:57 - 12:24:43 | -2788 |
| George/Umatilla | 12:16:45 | -17.7 | AT | Up | 58.9 | 160.2 | Up | 12:10:52 - 12:22:38 | -2791 |
| Entiat | 12:16:21 | -17.9 | AT | Up | 57.0 | 159.4 | Up | 12:10:28 - 12:22:14 | -2794 |
| Yuma | 12:19:43 | -16.0 | AT | Up | 72.8 | 163.5 | Up | 12:13:50 - 12:25:36 | -2800 |
| Wenatchee | 12:16:26 | -18.0 | AT | Up | 57.3 | 159.2 | Up | 12:10:33 - 12:22:19 | -2810 |
| Ellensburg | 12:16:29 | -18.2 | Dark | Up | 57.6 | 158.6 | Up | 12:10:36 - 12:22:22 | -2841 |
| Toppenish/White Swan | 12:16:36 | -18.3 | Dark | Up | 58.2 | 158.5 | Up | 12:10:43 - 12:22:29 | -2852 |
| Yakima | 12:16:34 | -18.3 | Dark | Up | 58.0 | 158.3 | Up | 12:10:41 - 12:22:27 | -2857 |
| Calipatria | 12:19:35 | -16.7 | AT | Up | 72.1 | 161.0 | Up | 12:13:42 - 12:25:28 | -2870 |
| Beatty | 12:18:43 | -17.3 | AT | Up | 68.2 | 160.5 | Up | 12:12:50 - 12:24:36 | -2871 |
| Tonopah | 12:18:26 | -17.5 | AT | Up | 67.0 | 160.2 | Up | 12:12:33 - 12:24:19 | -2876 |
| Goldendale | 12:16:42 | -18.7 | Dark | Up | 58.6 | 157.5 | Up | 12:10:49 - 12:22:35 | -2903 |
| The Dalles | 12:16:45 | -19.0 | Dark | Up | 58.7 | 156.7 | Up | 12:10:52 - 12:22:38 | -2939 |
| Maupin | 12:16:50 | -19.0 | Dark | Up | 59.2 | 156.7 | Up | 12:10:57 - 12:22:43 | -2946 |
| Idyllwild | 12:19:24 | -17.7 | AT | Up | 71.2 | 158.1 | Up | 12:13:31 - 12:25:17 | -2959 |
| Madras/Culver | 12:16:55 | -19.2 | Dark | Up | 59.7 | 156.2 | Up | 12:11:02 - 12:22:48 | -2969 |
| Hawthorne | 12:18:17 | -18.6 | Dark | Up | 66.1 | 157.2 | Up | 12:12:24 - 12:24:10 | -2980 |
| Redmond | 12:17:00 | -19.3 | Dark | Up | 60.0 | 155.9 | Up | 12:11:07 - 12:22:53 | -2986 |
| Lone Pine | 12:18:44 | -18.4 | Dark | Up | 68.1 | 157.1 | Up | 12:12:51 - 12:24:37 | -2992 |
| Paisley | 12:17:21 | -19.2 | Dark | Up | 61.6 | 156.1 | Up | 12:11:28 - 12:23:14 | -2994 |
| Lakeview | 12:17:27 | -19.2 | Dark | Up | 62.2 | 156.2 | Up | 12:11:34 - 12:23:20 | -2997 |
| Bishop | 12:18:34 | -18.6 | Dark | Up | 67.3 | 156.9 | Up | 12:12:41 - 12:24:27 | -2997 |
| North Lake | 12:17:13 | -19.4 | Dark | Up | 61.0 | 155.8 | Up | 12:11:20 - 12:23:06 | -3002 |
| Bend | 12:17:03 | -19.5 | Dark | Up | 60.1 | 155.6 | Up | 12:11:10 - 12:22:56 | -3004 |
| Cedarville | 12:17:35 | -19.2 | Dark | Up | 62.8 | 156.1 | Up | 12:11:42 - 12:23:28 | -3006 |
| Yerington | 12:18:10 | -18.9 | Dark | Up | 65.5 | 156.4 | Up | 12:12:17 - 12:24:03 | -3009 |
| Sisters | 12:16:59 | -19.6 | Dark | Up | 59.8 | 155.2 | Up | 12:11:06 - 12:22:52 | -3015 |
| Oregon Observatory | 12:17:04 | -19.6 | Dark | Up | 60.3 | 155.2 | Up | 12:11:11 - 12:22:57 | -3021 |
| La Pine/Gilchrist | 12:17:03 | -19.7 | Dark | Up | 60.4 | 154.9 | Up | 12:11:10 - 12:22:56 | -3033 |
| Lee Vining | 12:18:22 | -19.0 | Dark | Up | 66.5 | 155.7 | Up | 12:12:29 - 12:24:15 | -3039 |
| Reno | 12:18:01 | -19.3 | Dark | Up | 64.8 | 155.4 | Up | 12:12:08 - 12:23:54 | -3045 |
| Carson City | 12:18:05 | -19.4 | Dark | Up | 65.1 | 155.2 | Up | 12:12:12 - 12:23:58 | -3055 |
| Gardnerville | 12:18:08 | -19.4 | Dark | Up | 65.4 | 155.1 | Up | 12:12:15 - 12:24:01 | -3059 |
| Susanville | 12:17:48 | -19.8 | Dark | Up | 63.7 | 154.3 | Up | 12:11:55 - 12:23:41 | -3083 |
| Portola | 12:17:56 | -19.8 | Dark | Up | 64.3 | 154.2 | Up | 12:12:03 - 12:23:49 | -3089 |
| Tulelake | 12:17:27 | -20.1 | Dark | Up | 62.0 | 153.8 | Up | 12:11:34 - 12:23:20 | -3094 |
| Chiloquin | 12:17:19 | -20.2 | Dark | Up | 61.3 | 153.5 | Up | 12:11:26 - 12:23:12 | -3101 |
| Klamath Falls | 12:17:23 | -20.2 | Dark | Up | 61.7 | 153.4 | Up | 12:11:30 - 12:23:16 | -3107 |
| Gimple | 12:17:50 | -20.0 | Dark | Up | 63.9 | 153.6 | Up | 12:11:57 - 12:23:43 | -3110 |
| Greenville | 12:17:50 | -20.1 | Dark | Up | 63.8 | 153.5 | Up | 12:11:57 - 12:23:43 | -3116 |
| Wildwood | 12:19:13 | -19.2 | Dark | Up | 70.2 | 153.2 | Up | 12:13:20 - 12:25:06 | -3117 |
| Fall River/Burney | 12:17:38 | -20.2 | Dark | Up | 62.9 | 153.3 | Up | 12:11:45 - 12:23:31 | -3120 |
| Quincy | 12:17:53 | -20.1 | Dark | Up | 64.0 | 153.3 | Up | 12:12:00 - 12:23:46 | -3123 |
| CPSLO | 12:18:52 | -20.7 | Dark | Up | 68.3 | 149.5 | Up | 12:12:59 - 12:24:45 | -3258 |
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 281371, (2018/09/30 12:23UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 9.64 20 Bellatrix 05:25:07.8 +06:20:58 1.6 10.25 15 126 Tau 05:41:17.7 +16:32:02 4.6 0.88 13 PPM 121200 05:37:53.3 +15:54:57 8.3 0.19 12 281371 05:38:07.2 +16:05:37 15.5 12 Positions are for J2000
Event circumstances last updated at 2018/05/24 18:03:06 UT
Marc W. Buie, Southwest Research Institute