Event between 00SR331 and star GDR2_105.109_18.304 with event index number of 168436
Geocentric closest approach at 2018/12/20 11:10:35 UTC
J2000 position of star is 07:00:26.2 +18:18:15
Equinox of date position of star is 07:01:30.6 +18:16:38
Stellar brightness G=16.3,
use SENSEUP=128
Star is 46 degrees from the moon.
Moon is 93% illuminated.
TNO apparent brightness V=23.9
[RECON map]
TNO is 32.5 AU from the Sun
and 31.5 AU from the Earth.
The TNO is moving 23.0
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 509 seconds.
The 1-sigma cross-track error in the shadow position is
1859 km.
The sky-plane scale is
22864.5 km/arcsec.
The TNO has an absolute magnitude Hv=8.8
Diameter=104.7 km assuming a 5% albedo -- 4.6 sec chord
Diameter=42.8 km assuming a 30% albedo -- 1.9 sec chord
Dynamical classification is 5:2EEE
Star training set for 00SR331, (2018/12/20 11:11UT) Object RA Dec mag sep mel Pollux 07:46:28.5 +27:58:44 1.1 14.16 56 Alhena 06:38:48.5 +16:22:53 1.9 5.75 41 PPM 123373 07:01:23.2 +15:30:26 6.4 2.77 46 PPM 123408 07:02:51.8 +17:56:49 7.8 0.46 47 PPM 123380 07:01:41.4 +18:08:04 9.7 0.15 46 00SR331 07:01:32.6 +18:16:35 16.3 46 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
1.8 sigma about the mid-time.
The median site spacing is 21.0 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) |
| Oroville | 11:09:10 | -44.4 | Dark | Up | 50.1 | 231.1 | Up | 10:54:10 - 11:24:10 | 11888 |
| Tonasket | 11:09:09 | -44.4 | Dark | Up | 50.3 | 231.4 | Up | 10:54:09 - 11:24:09 | 11867 |
| Okanogan | 11:09:09 | -44.6 | Dark | Up | 50.5 | 231.5 | Up | 10:54:09 - 11:24:09 | 11835 |
| Brewster | 11:09:09 | -44.8 | Dark | Up | 50.8 | 231.5 | Up | 10:54:09 - 11:24:09 | 11808 |
| Manson/Chelan | 11:09:10 | -45.1 | Dark | Up | 51.1 | 231.2 | Up | 10:54:10 - 11:24:10 | 11783 |
| Entiat | 11:09:09 | -45.2 | Dark | Up | 51.3 | 231.3 | Up | 10:54:09 - 11:24:09 | 11762 |
| Wenatchee | 11:09:09 | -45.4 | Dark | Up | 51.5 | 231.5 | Up | 10:54:09 - 11:24:09 | 11737 |
| Ellensburg | 11:09:09 | -45.6 | Dark | Up | 51.9 | 231.6 | Up | 10:54:09 - 11:24:09 | 11696 |
| Yakima | 11:09:09 | -45.7 | Dark | Up | 52.2 | 232.0 | Up | 10:54:09 - 11:24:09 | 11659 |
| Pasco | 11:09:04 | -44.9 | Dark | Up | 51.6 | 234.1 | Up | 10:54:04 - 11:24:04 | 11653 |
| Toppenish/White Swan | 11:09:06 | -45.7 | Dark | Up | 52.2 | 232.4 | Up | 10:54:06 - 11:24:06 | 11642 |
| PNWRO | 11:09:02 | -44.8 | Dark | Up | 51.6 | 234.6 | Up | 10:54:02 - 11:24:02 | 11635 |
| George/Umatilla | 11:09:04 | -45.1 | Dark | Up | 51.9 | 234.2 | Up | 10:54:04 - 11:24:04 | 11619 |
| Goldendale | 11:09:07 | -46.1 | Dark | Up | 52.8 | 232.4 | Up | 10:54:07 - 11:24:07 | 11584 |
| The Dalles | 11:09:09 | -46.4 | Dark | Up | 53.1 | 232.2 | Up | 10:54:09 - 11:24:09 | 11557 |
| Maupin | 11:09:07 | -46.4 | Dark | Up | 53.3 | 232.8 | Up | 10:54:07 - 11:24:07 | 11520 |
| Madras/Culver | 11:09:05 | -46.6 | Dark | Up | 53.7 | 233.3 | Up | 10:54:05 - 11:24:05 | 11469 |
| Redmond | 11:09:06 | -46.7 | Dark | Up | 53.9 | 233.6 | Up | 10:54:06 - 11:24:06 | 11434 |
| Sisters | 11:09:07 | -47.0 | Dark | Up | 54.1 | 233.1 | Up | 10:54:07 - 11:24:07 | 11429 |
| Bend | 11:09:05 | -46.9 | Dark | Up | 54.1 | 233.7 | Up | 10:54:05 - 11:24:05 | 11412 |
| Oregon Observatory | 11:09:05 | -47.0 | Dark | Up | 54.3 | 233.7 | Up | 10:54:05 - 11:24:05 | 11393 |
| Niwot | 11:08:11 | -35.5 | Dark | Up | 45.1 | 254.7 | Up | 10:53:11 - 11:23:11 | 11377 |
| La Pine/Gilchrist | 11:09:05 | -47.1 | Dark | Up | 54.5 | 233.9 | Up | 10:54:05 - 11:24:05 | 11373 |
| North Lake | 11:09:02 | -46.8 | Dark | Up | 54.4 | 235.1 | Up | 10:54:02 - 11:24:02 | 11343 |
| Paisley | 11:09:00 | -46.6 | Dark | Up | 54.5 | 236.2 | Up | 10:54:00 - 11:24:00 | 11297 |
| Chiloquin | 11:09:04 | -47.6 | Dark | Up | 55.3 | 234.7 | Up | 10:54:04 - 11:24:04 | 11261 |
| Lakeview | 11:08:58 | -46.6 | Dark | Up | 54.6 | 237.0 | Up | 10:53:58 - 11:23:58 | 11252 |
| Klamath Falls | 11:09:03 | -47.6 | Dark | Up | 55.5 | 235.2 | Up | 10:54:03 - 11:24:03 | 11230 |
| Tulelake | 11:09:02 | -47.4 | Dark | Up | 55.4 | 235.9 | Up | 10:54:02 - 11:24:02 | 11210 |
| Cedarville | 11:08:57 | -46.6 | Dark | Up | 54.9 | 238.0 | Up | 10:53:57 - 11:23:57 | 11193 |
| Fall River/Burney | 11:09:00 | -47.5 | Dark | Up | 55.9 | 237.1 | Up | 10:54:00 - 11:24:00 | 11124 |
| Susanville | 11:08:56 | -47.1 | Dark | Up | 55.8 | 238.8 | Up | 10:53:56 - 11:23:56 | 11077 |
| Gimple | 11:08:56 | -47.3 | Dark | Up | 56.0 | 238.9 | Up | 10:53:56 - 11:23:56 | 11046 |
| Greenville | 11:08:57 | -47.4 | Dark | Up | 56.1 | 238.8 | Up | 10:53:57 - 11:23:57 | 11044 |
| Quincy | 11:08:57 | -47.4 | Dark | Up | 56.2 | 239.1 | Up | 10:53:57 - 11:23:57 | 11025 |
| Portola | 11:08:54 | -47.0 | Dark | Up | 56.0 | 239.8 | Up | 10:53:54 - 11:23:54 | 11021 |
| Reno | 11:08:51 | -46.6 | Dark | Up | 55.7 | 240.9 | Up | 10:53:51 - 11:23:51 | 11008 |
| Carson City | 11:08:51 | -46.6 | Dark | Up | 55.8 | 241.4 | Up | 10:53:51 - 11:23:51 | 10974 |
| Yerington | 11:08:49 | -46.2 | Dark | Up | 55.5 | 242.4 | Up | 10:53:49 - 11:23:49 | 10967 |
| Gardnerville | 11:08:51 | -46.6 | Dark | Up | 55.9 | 241.7 | Up | 10:53:51 - 11:23:51 | 10951 |
| Hawthorne | 11:08:45 | -45.8 | Dark | Up | 55.3 | 243.5 | Up | 10:53:45 - 11:23:45 | 10932 |
| Tonopah | 11:08:40 | -44.7 | Dark | Up | 54.5 | 245.7 | Up | 10:53:40 - 11:23:40 | 10915 |
| Lee Vining | 11:08:47 | -46.2 | Dark | Up | 55.9 | 243.7 | Up | 10:53:47 - 11:23:47 | 10867 |
| Bishop | 11:08:43 | -45.7 | Dark | Up | 55.7 | 245.3 | Up | 10:53:43 - 11:23:43 | 10823 |
| Beatty | 11:08:37 | -44.5 | Dark | Up | 54.7 | 247.6 | Up | 10:53:37 - 11:23:37 | 10811 |
| Indian Springs | 11:08:33 | -43.6 | Dark | Up | 54.0 | 249.1 | Up | 10:53:33 - 11:23:33 | 10802 |
| Henderson | 11:08:29 | -43.1 | Dark | Up | 53.7 | 250.5 | Up | 10:53:29 - 11:23:29 | 10764 |
| Lone Pine | 11:08:40 | -45.5 | Dark | Up | 55.7 | 246.7 | Up | 10:53:40 - 11:23:40 | 10754 |
| Patrick | 11:08:25 | -42.2 | Dark | Up | 53.0 | 252.3 | Up | 10:53:25 - 11:23:25 | 10727 |
| DCO | 11:08:22 | -41.6 | Dark | Up | 52.6 | 253.3 | Up | 10:53:22 - 11:23:22 | 10713 |
| Searchlight/Boulder City | 11:08:29 | -43.0 | Dark | Up | 53.8 | 251.3 | Up | 10:53:29 - 11:23:29 | 10709 |
| Kingman/Dolan Springs | 11:08:25 | -42.3 | Dark | Up | 53.2 | 252.4 | Up | 10:53:25 - 11:23:25 | 10701 |
| Laughlin/Bullhead City | 11:08:27 | -42.7 | Dark | Up | 53.7 | 252.0 | Up | 10:53:27 - 11:23:27 | 10687 |
| Mohave Valley | 11:08:26 | -42.7 | Dark | Up | 53.7 | 252.3 | Up | 10:53:26 - 11:23:26 | 10660 |
| Lake Havasu City | 11:08:24 | -42.5 | Dark | Up | 53.7 | 253.1 | Up | 10:53:24 - 11:23:24 | 10626 |
| Parker | 11:08:24 | -42.5 | Dark | Up | 53.7 | 253.6 | Up | 10:53:24 - 11:23:24 | 10592 |
| CPSLO | 11:08:47 | -47.6 | Dark | Up | 58.2 | 245.7 | Up | 10:53:47 - 11:23:47 | 10572 |
| Blythe | 11:08:24 | -42.7 | Dark | Up | 54.1 | 254.0 | Up | 10:53:24 - 11:23:24 | 10532 |
| Idyllwild | 11:08:31 | -44.5 | Dark | Up | 55.8 | 251.9 | Up | 10:53:31 - 11:23:31 | 10497 |
| Wildwood | 11:08:38 | -46.0 | Dark | Up | 57.1 | 249.6 | Up | 10:53:38 - 11:23:38 | 10492 |
| Calipatria | 11:08:26 | -43.5 | Dark | Up | 55.0 | 253.8 | Up | 10:53:26 - 11:23:26 | 10461 |
| Yuma | 11:08:23 | -42.7 | Dark | Up | 54.4 | 255.2 | Up | 10:53:23 - 11:23:23 | 10438 |
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 00SR331, (2018/12/20 11:11UT) Object RA Dec mag sep mel Pollux 07:45:18.1 +28:01:33 1.1 14.16 56 Alhena 06:37:42.8 +16:23:57 1.9 5.75 41 PPM 123373 07:00:18.1 +15:32:06 6.4 2.77 46 PPM 123408 07:01:45.6 +17:58:31 7.8 0.46 47 PPM 123380 07:00:35.0 +18:09:44 9.7 0.15 46 00SR331 07:00:26.2 +18:18:15 16.3 46 Positions are for J2000
Event circumstances last updated at 2018/05/24 18:11:27 UT
Marc W. Buie, Southwest Research Institute