Event between 98WX31 and star GA1140:02440066 with event index number of 241120
Geocentric closest approach at 2019/12/10 10:24:48 UTC
J2000 position of star is 06:40:50.0 +25:46:48
Equinox of date position of star is 06:41:58.4 +25:45:42
Stellar brightness G=16.1,
use SENSEUP=128
Star is 43 degrees from the moon.
Moon is 96% illuminated.
TNO apparent brightness V=22.8
[RECON map]
TNO is 40.8 AU from the Sun
and 39.9 AU from the Earth.
The TNO is moving 23.4
km/sec on the sky relative to the star, or,
2.9 arcsec/hr.
The 1-sigma error in the time of the event is 264 seconds.
The 1-sigma cross-track error in the shadow position is
1954 km.
The sky-plane scale is
28917.3 km/arcsec.
The TNO has an absolute magnitude Hv=6.7
Diameter=279.3 km assuming a 5% albedo -- 12.0 sec chord
Diameter=114.0 km assuming a 30% albedo -- 4.9 sec chord
Dynamical classification is CLASSICAL
Star training set for 98WX31, (2019/12/10 10:25UT) Object RA Dec mag sep mel Pollux 07:46:32.1 +27:58:35 1.1 14.54 57 Alhena 06:38:51.8 +16:22:50 1.9 9.41 42 PPM 096264 06:38:40.6 +24:34:21 6.5 1.41 42 PPM 096322 06:40:44.8 +24:34:53 6.9 1.22 43 PPM 096396 06:43:14.1 +25:47:56 9.6 0.27 43 PPM 096357 06:41:42.3 +25:41:47 10.4 0.10 43 98WX31 06:42:04.0 +25:45:36 16.1 43 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
3.4 sigma about the mid-time.
The median site spacing is 23.8 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) |
| Penticton | 10:22:32 | -50.1 | Dark | Up | 63.6 | 211.1 | Up | 10:07:32 - 10:37:32 | 12088 |
| Oroville | 10:22:30 | -50.4 | Dark | Up | 64.1 | 211.9 | Up | 10:07:30 - 10:37:30 | 12031 |
| Tonasket | 10:22:30 | -50.5 | Dark | Up | 64.3 | 212.2 | Up | 10:07:30 - 10:37:30 | 12008 |
| Okanogan | 10:22:30 | -50.7 | Dark | Up | 64.7 | 212.2 | Up | 10:07:30 - 10:37:30 | 11972 |
| Brewster | 10:22:30 | -50.9 | Dark | Up | 65.0 | 212.2 | Up | 10:07:30 - 10:37:30 | 11942 |
| Manson/Chelan | 10:22:31 | -51.3 | Dark | Up | 65.3 | 211.7 | Up | 10:07:31 - 10:37:31 | 11916 |
| Entiat | 10:22:31 | -51.4 | Dark | Up | 65.5 | 211.8 | Up | 10:07:31 - 10:37:31 | 11893 |
| Wenatchee | 10:22:31 | -51.6 | Dark | Up | 65.7 | 211.9 | Up | 10:07:31 - 10:37:31 | 11866 |
| Ellensburg | 10:22:31 | -51.9 | Dark | Up | 66.2 | 211.9 | Up | 10:07:31 - 10:37:31 | 11821 |
| Yakima | 10:22:31 | -52.1 | Dark | Up | 66.5 | 212.4 | Up | 10:07:31 - 10:37:31 | 11780 |
| Pasco | 10:22:26 | -51.3 | Dark | Up | 66.2 | 215.7 | Up | 10:07:26 - 10:37:26 | 11768 |
| Toppenish/White Swan | 10:22:30 | -52.1 | Dark | Up | 66.6 | 213.0 | Up | 10:07:30 - 10:37:30 | 11761 |
| PNWRO | 10:22:24 | -51.3 | Dark | Up | 66.3 | 216.5 | Up | 10:07:24 - 10:37:24 | 11747 |
| George/Umatilla | 10:22:27 | -51.6 | Dark | Up | 66.6 | 215.7 | Up | 10:07:27 - 10:37:27 | 11731 |
| Goldendale | 10:22:31 | -52.6 | Dark | Up | 67.3 | 212.8 | Up | 10:07:31 - 10:37:31 | 11699 |
| The Dalles | 10:22:32 | -52.9 | Dark | Up | 67.6 | 212.3 | Up | 10:07:32 - 10:37:32 | 11671 |
| Maupin | 10:22:30 | -53.0 | Dark | Up | 67.9 | 213.1 | Up | 10:07:30 - 10:37:30 | 11630 |
| Madras/Culver | 10:22:30 | -53.3 | Dark | Up | 68.4 | 213.8 | Up | 10:07:30 - 10:37:30 | 11573 |
| Redmond | 10:22:30 | -53.4 | Dark | Up | 68.7 | 214.2 | Up | 10:07:30 - 10:37:30 | 11536 |
| Sisters | 10:22:32 | -53.7 | Dark | Up | 68.8 | 213.3 | Up | 10:07:32 - 10:37:32 | 11532 |
| Bend | 10:22:30 | -53.6 | Dark | Up | 68.9 | 214.2 | Up | 10:07:30 - 10:37:30 | 11512 |
| Oregon Observatory | 10:22:30 | -53.8 | Dark | Up | 69.1 | 214.1 | Up | 10:07:30 - 10:37:30 | 11492 |
| La Pine/Gilchrist | 10:22:30 | -53.9 | Dark | Up | 69.3 | 214.3 | Up | 10:07:30 - 10:37:30 | 11470 |
| North Lake | 10:22:28 | -53.7 | Dark | Up | 69.4 | 216.3 | Up | 10:07:28 - 10:37:28 | 11435 |
| Niwot | 10:21:32 | -43.1 | Dark | Up | 62.0 | 248.0 | Up | 10:06:32 - 10:36:32 | 11434 |
| Paisley | 10:22:27 | -53.6 | Dark | Up | 69.7 | 218.0 | Up | 10:07:27 - 10:37:27 | 11383 |
| Chiloquin | 10:22:30 | -54.6 | Dark | Up | 70.4 | 215.2 | Up | 10:07:30 - 10:37:30 | 11350 |
| Lakeview | 10:22:25 | -53.7 | Dark | Up | 70.0 | 219.3 | Up | 10:07:25 - 10:37:25 | 11334 |
| Klamath Falls | 10:22:30 | -54.6 | Dark | Up | 70.6 | 215.9 | Up | 10:07:30 - 10:37:30 | 11315 |
| Tulelake | 10:22:29 | -54.5 | Dark | Up | 70.7 | 217.1 | Up | 10:07:29 - 10:37:29 | 11292 |
| Cedarville | 10:22:24 | -53.8 | Dark | Up | 70.4 | 220.8 | Up | 10:07:24 - 10:37:24 | 11269 |
| Fall River/Burney | 10:22:28 | -54.8 | Dark | Up | 71.4 | 218.9 | Up | 10:07:28 - 10:37:28 | 11199 |
| Susanville | 10:22:24 | -54.5 | Dark | Up | 71.5 | 221.9 | Up | 10:07:24 - 10:37:24 | 11145 |
| Gimple | 10:22:25 | -54.7 | Dark | Up | 71.8 | 221.9 | Up | 10:07:25 - 10:37:25 | 11112 |
| Greenville | 10:22:25 | -54.8 | Dark | Up | 71.9 | 221.7 | Up | 10:07:25 - 10:37:25 | 11111 |
| Quincy | 10:22:24 | -54.8 | Dark | Up | 72.0 | 222.1 | Up | 10:07:24 - 10:37:24 | 11090 |
| Portola | 10:22:23 | -54.5 | Dark | Up | 71.9 | 223.5 | Up | 10:07:23 - 10:37:23 | 11085 |
| Reno | 10:22:20 | -54.1 | Dark | Up | 71.7 | 225.6 | Up | 10:07:20 - 10:37:20 | 11068 |
| Carson City | 10:22:20 | -54.2 | Dark | Up | 71.9 | 226.4 | Up | 10:07:20 - 10:37:20 | 11031 |
| Yerington | 10:22:17 | -53.8 | Dark | Up | 71.7 | 228.2 | Up | 10:07:17 - 10:37:17 | 11021 |
| Gardnerville | 10:22:19 | -54.3 | Dark | Up | 72.1 | 227.0 | Up | 10:07:19 - 10:37:19 | 11006 |
| Hawthorne | 10:22:14 | -53.5 | Dark | Up | 71.7 | 230.4 | Up | 10:07:14 - 10:37:14 | 10982 |
| Tonopah | 10:22:08 | -52.6 | Dark | Up | 71.1 | 234.4 | Up | 10:07:08 - 10:37:08 | 10959 |
| Lee Vining | 10:22:16 | -54.0 | Dark | Up | 72.4 | 230.7 | Up | 10:07:16 - 10:37:16 | 10914 |
| Bishop | 10:22:12 | -53.6 | Dark | Up | 72.3 | 233.7 | Up | 10:07:12 - 10:37:12 | 10864 |
| Beatty | 10:22:06 | -52.4 | Dark | Up | 71.5 | 238.1 | Up | 10:07:06 - 10:37:06 | 10846 |
| Indian Springs | 10:22:02 | -51.7 | Dark | Up | 70.9 | 240.8 | Up | 10:07:02 - 10:37:02 | 10833 |
| Henderson | 10:21:58 | -51.2 | Dark | Up | 70.7 | 243.3 | Up | 10:06:58 - 10:36:58 | 10791 |
| Lone Pine | 10:22:10 | -53.5 | Dark | Up | 72.5 | 236.3 | Up | 10:07:10 - 10:37:10 | 10790 |
| Patrick | 10:21:54 | -50.4 | Dark | Up | 70.1 | 246.6 | Up | 10:06:54 - 10:36:54 | 10749 |
| DCO | 10:21:50 | -49.9 | Dark | Up | 69.7 | 248.4 | Up | 10:06:50 - 10:36:50 | 10732 |
| Searchlight/Boulder City | 10:21:58 | -51.2 | Dark | Up | 70.9 | 244.9 | Up | 10:06:58 - 10:36:58 | 10732 |
| Kingman/Dolan Springs | 10:21:54 | -50.6 | Dark | Up | 70.4 | 246.9 | Up | 10:06:54 - 10:36:54 | 10722 |
| Laughlin/Bullhead City | 10:21:56 | -51.0 | Dark | Up | 70.8 | 246.2 | Up | 10:06:56 - 10:36:56 | 10708 |
| Mohave Valley | 10:21:56 | -51.0 | Dark | Up | 70.9 | 246.9 | Up | 10:06:56 - 10:36:56 | 10680 |
| Lake Havasu City | 10:21:54 | -50.9 | Dark | Up | 70.8 | 248.3 | Up | 10:06:54 - 10:36:54 | 10643 |
| Parker | 10:21:53 | -50.9 | Dark | Up | 70.9 | 249.3 | Up | 10:06:53 - 10:36:53 | 10606 |
| CPSLO | 10:22:18 | -55.8 | Dark | Up | 75.0 | 234.5 | Up | 10:07:18 - 10:37:18 | 10605 |
| Blythe | 10:21:54 | -51.2 | Dark | Up | 71.3 | 250.3 | Up | 10:06:54 - 10:36:54 | 10544 |
| Wildwood | 10:22:09 | -54.4 | Dark | Up | 74.2 | 242.5 | Up | 10:07:09 - 10:37:09 | 10513 |
| Idyllwild | 10:22:01 | -52.9 | Dark | Up | 72.9 | 246.9 | Up | 10:07:01 - 10:37:01 | 10512 |
| Calipatria | 10:21:57 | -52.0 | Dark | Up | 72.2 | 250.4 | Up | 10:06:57 - 10:36:57 | 10472 |
| Yuma | 10:21:53 | -51.3 | Dark | Up | 71.7 | 252.9 | Up | 10:06:53 - 10:36:53 | 10445 |
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 98WX31, (2019/12/10 10:25UT) Object RA Dec mag sep mel Pollux 07:45:18.1 +28:01:33 1.1 14.54 57 Alhena 06:37:42.8 +16:23:57 1.9 9.41 42 PPM 096264 06:37:27.2 +24:35:27 6.5 1.41 42 PPM 096322 06:39:31.5 +24:36:02 6.9 1.22 43 PPM 096396 06:42:00.1 +25:49:10 9.6 0.27 43 PPM 096357 06:40:28.4 +25:42:58 10.4 0.10 43 98WX31 06:40:50.0 +25:46:48 16.1 43 Positions are for J2000
Event circumstances last updated at 2018/06/12 07:53:02 UT
Marc W. Buie, Southwest Research Institute