Event between 98WY31 and star GA1140:02489559 with event index number of 225636
Geocentric closest approach at 2019/11/21 11:51:58 UTC
J2000 position of star is 06:44:41.5 +24:13:07
Equinox of date position of star is 06:45:49.0 +24:11:55
Stellar brightness G=13.8,
use SENSEUP=64
Star is 70 degrees from the moon.
Moon is 32% illuminated.
TNO apparent brightness V=23.2
[RECON map]
TNO is 43.0 AU from the Sun
and 42.2 AU from the Earth.
The TNO is moving 18.2
km/sec on the sky relative to the star, or,
2.1 arcsec/hr.
The 1-sigma error in the time of the event is 1201 seconds.
The 1-sigma cross-track error in the shadow position is
5612 km.
The sky-plane scale is
30640.3 km/arcsec.
The TNO has an absolute magnitude Hv=6.8
Diameter=257.0 km assuming a 5% albedo -- 14.2 sec chord
Diameter=104.9 km assuming a 30% albedo -- 5.8 sec chord
Dynamical classification is CLASSICAL
Star training set for 98WY31, (2019/11/21 11:52UT) Object RA Dec mag sep mel Pollux 07:46:31.9 +27:58:36 1.1 14.12 57 Alhena 06:38:51.6 +16:22:50 1.9 7.99 72 PPM 096264 06:38:40.4 +24:34:21 6.5 1.69 72 PPM 096508 06:47:22.7 +23:20:57 7.4 0.91 70 PPM 096499 06:46:49.8 +24:06:16 8.7 0.23 70 PPM 096470 06:45:47.0 +24:04:19 11.0 0.13 70 98WY31 06:45:54.4 +24:11:49 13.8 70 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
0.7 sigma about the mid-time.
The median site spacing is 22.4 km
RECON observability=1.0 and success probability=8.1%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Penticton | 11:51:08 | -33.2 | Dark | Up | 61.3 | 214.3 | Up | 11:36:08 - 12:06:08 | 362 |
| Oroville | 11:51:06 | -33.2 | Dark | Up | 61.8 | 215.1 | Up | 11:36:06 - 12:06:06 | 306 |
| Tonasket | 11:51:06 | -33.2 | Dark | Up | 62.0 | 215.4 | Up | 11:36:06 - 12:06:06 | 284 |
| Okanogan | 11:51:06 | -33.4 | Dark | Up | 62.3 | 215.5 | Up | 11:36:06 - 12:06:06 | 249 |
| Brewster | 11:51:06 | -33.5 | Dark | Up | 62.6 | 215.4 | Up | 11:36:06 - 12:06:06 | 219 |
| Manson/Chelan | 11:51:07 | -33.8 | Dark | Up | 62.9 | 215.0 | Up | 11:36:07 - 12:06:07 | 193 |
| Entiat | 11:51:07 | -33.9 | Dark | Up | 63.1 | 215.1 | Up | 11:36:07 - 12:06:07 | 170 |
| Wenatchee | 11:51:07 | -34.0 | Dark | Up | 63.4 | 215.2 | Up | 11:36:07 - 12:06:07 | 144 |
| Ellensburg | 11:51:07 | -34.2 | Dark | Up | 63.8 | 215.3 | Up | 11:36:07 - 12:06:07 | 100 |
| Yakima | 11:51:06 | -34.2 | Dark | Up | 64.1 | 215.8 | Up | 11:36:06 - 12:06:06 | 59 |
| Pasco | 11:51:00 | -33.3 | Dark | Up | 63.8 | 218.8 | Up | 11:36:00 - 12:06:00 | 50 |
| Toppenish/White Swan | 11:51:05 | -34.2 | Dark | Up | 64.2 | 216.3 | Up | 11:36:05 - 12:06:05 | 41 |
| PNWRO | 11:50:59 | -33.2 | Dark | Up | 63.9 | 219.5 | Up | 11:35:59 - 12:05:59 | 30 |
| George/Umatilla | 11:51:01 | -33.5 | Dark | Up | 64.2 | 218.8 | Up | 11:36:01 - 12:06:01 | 13 |
| Goldendale | 11:51:06 | -34.5 | Dark | Up | 64.9 | 216.2 | Up | 11:36:06 - 12:06:06 | -21 |
| The Dalles | 11:51:07 | -34.8 | Dark | Up | 65.2 | 215.8 | Up | 11:36:07 - 12:06:07 | -49 |
| Maupin | 11:51:06 | -34.8 | Dark | Up | 65.5 | 216.5 | Up | 11:36:06 - 12:06:06 | -90 |
| Madras/Culver | 11:51:05 | -34.9 | Dark | Up | 65.9 | 217.2 | Up | 11:36:05 - 12:06:05 | -145 |
| Redmond | 11:51:05 | -34.9 | Dark | Up | 66.2 | 217.6 | Up | 11:36:05 - 12:06:05 | -182 |
| Sisters | 11:51:07 | -35.2 | Dark | Up | 66.4 | 216.7 | Up | 11:36:07 - 12:06:07 | -186 |
| Bend | 11:51:05 | -35.1 | Dark | Up | 66.5 | 217.6 | Up | 11:36:05 - 12:06:05 | -206 |
| Oregon Observatory | 11:51:05 | -35.2 | Dark | Up | 66.7 | 217.6 | Up | 11:36:05 - 12:06:05 | -225 |
| La Pine/Gilchrist | 11:51:05 | -35.2 | Dark | Up | 66.9 | 217.7 | Up | 11:36:05 - 12:06:05 | -247 |
| Niwot | 11:49:52 | -23.3 | Dark | Up | 59.3 | 248.4 | Up | 11:34:52 - 12:04:52 | -258 |
| North Lake | 11:51:02 | -34.8 | Dark | Up | 66.9 | 219.6 | Up | 11:36:02 - 12:06:02 | -281 |
| Paisley | 11:51:00 | -34.6 | Dark | Up | 67.2 | 221.1 | Up | 11:36:00 - 12:06:00 | -330 |
| Chiloquin | 11:51:05 | -35.6 | Dark | Up | 67.9 | 218.6 | Up | 11:36:05 - 12:06:05 | -366 |
| Lakeview | 11:50:58 | -34.5 | Dark | Up | 67.5 | 222.3 | Up | 11:35:58 - 12:05:58 | -379 |
| Klamath Falls | 11:51:04 | -35.6 | Dark | Up | 68.1 | 219.3 | Up | 11:36:04 - 12:06:04 | -399 |
| Tulelake | 11:51:02 | -35.4 | Dark | Up | 68.2 | 220.4 | Up | 11:36:02 - 12:06:02 | -422 |
| Cedarville | 11:50:56 | -34.4 | Dark | Up | 67.9 | 223.7 | Up | 11:35:56 - 12:05:56 | -442 |
| Fall River/Burney | 11:51:01 | -35.4 | Dark | Up | 68.8 | 222.1 | Up | 11:36:01 - 12:06:01 | -513 |
| Susanville | 11:50:56 | -34.9 | Dark | Up | 68.9 | 224.7 | Up | 11:35:56 - 12:05:56 | -565 |
| Gimple | 11:50:57 | -35.0 | Dark | Up | 69.2 | 224.8 | Up | 11:35:57 - 12:05:57 | -597 |
| Greenville | 11:50:57 | -35.1 | Dark | Up | 69.3 | 224.6 | Up | 11:35:57 - 12:05:57 | -599 |
| Quincy | 11:50:57 | -35.1 | Dark | Up | 69.4 | 225.0 | Up | 11:35:57 - 12:05:57 | -620 |
| Portola | 11:50:54 | -34.8 | Dark | Up | 69.2 | 226.2 | Up | 11:35:54 - 12:05:54 | -624 |
| Reno | 11:50:51 | -34.3 | Dark | Up | 69.1 | 228.0 | Up | 11:35:51 - 12:05:51 | -639 |
| Carson City | 11:50:50 | -34.3 | Dark | Up | 69.3 | 228.7 | Up | 11:35:50 - 12:05:50 | -676 |
| Yerington | 11:50:47 | -33.8 | Dark | Up | 69.1 | 230.3 | Up | 11:35:47 - 12:05:47 | -684 |
| Gardnerville | 11:50:50 | -34.2 | Dark | Up | 69.4 | 229.3 | Up | 11:35:50 - 12:05:50 | -701 |
| Hawthorne | 11:50:44 | -33.4 | Dark | Up | 69.0 | 232.3 | Up | 11:35:44 - 12:05:44 | -722 |
| Tonopah | 11:50:37 | -32.3 | Dark | Up | 68.4 | 235.7 | Up | 11:35:37 - 12:05:37 | -742 |
| Lee Vining | 11:50:45 | -33.8 | Dark | Up | 69.7 | 232.5 | Up | 11:35:45 - 12:05:45 | -790 |
| Bishop | 11:50:41 | -33.2 | Dark | Up | 69.6 | 235.1 | Up | 11:35:41 - 12:05:41 | -838 |
| Beatty | 11:50:33 | -31.9 | Dark | Up | 68.8 | 239.0 | Up | 11:35:33 - 12:05:33 | -853 |
| Indian Springs | 11:50:28 | -31.1 | Dark | Up | 68.2 | 241.4 | Up | 11:35:28 - 12:05:28 | -864 |
| Henderson | 11:50:24 | -30.5 | Dark | Up | 67.9 | 243.6 | Up | 11:35:24 - 12:05:24 | -904 |
| Lone Pine | 11:50:38 | -32.9 | Dark | Up | 69.8 | 237.4 | Up | 11:35:38 - 12:05:38 | -911 |
| Patrick | 11:50:17 | -29.6 | Dark | Up | 67.4 | 246.5 | Up | 11:35:17 - 12:05:17 | -944 |
| DCO | 11:50:14 | -29.0 | Dark | Up | 67.0 | 248.1 | Up | 11:35:14 - 12:05:14 | -959 |
| Searchlight/Boulder City | 11:50:22 | -30.4 | Dark | Up | 68.2 | 245.0 | Up | 11:35:22 - 12:05:22 | -962 |
| Kingman/Dolan Springs | 11:50:18 | -29.7 | Dark | Up | 67.6 | 246.8 | Up | 11:35:18 - 12:05:18 | -971 |
| Laughlin/Bullhead City | 11:50:20 | -30.1 | Dark | Up | 68.0 | 246.1 | Up | 11:35:20 - 12:05:20 | -985 |
| Mohave Valley | 11:50:20 | -30.1 | Dark | Up | 68.1 | 246.7 | Up | 11:35:20 - 12:05:20 | -1014 |
| Lake Havasu City | 11:50:18 | -29.9 | Dark | Up | 68.1 | 248.0 | Up | 11:35:18 - 12:05:18 | -1050 |
| Parker | 11:50:17 | -29.8 | Dark | Up | 68.2 | 248.8 | Up | 11:35:17 - 12:05:17 | -1086 |
| CPSLO | 11:50:48 | -35.0 | Dark | Up | 72.2 | 235.8 | Up | 11:35:48 - 12:05:48 | -1098 |
| Blythe | 11:50:17 | -30.0 | Dark | Up | 68.6 | 249.7 | Up | 11:35:17 - 12:05:17 | -1148 |
| Idyllwild | 11:50:27 | -31.7 | Dark | Up | 70.2 | 246.5 | Up | 11:35:27 - 12:05:27 | -1183 |
| Wildwood | 11:50:37 | -33.3 | Dark | Up | 71.4 | 242.7 | Up | 11:35:37 - 12:05:37 | -1185 |
| Calipatria | 11:50:21 | -30.7 | Dark | Up | 69.5 | 249.7 | Up | 11:35:21 - 12:05:21 | -1221 |
| Yuma | 11:50:16 | -30.0 | Dark | Up | 69.0 | 251.9 | Up | 11:35:16 - 12:05:16 | -1246 |
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 98WY31, (2019/11/21 11:52UT) Object RA Dec mag sep mel Pollux 07:45:18.1 +28:01:33 1.1 14.12 57 Alhena 06:37:42.8 +16:23:57 1.9 7.99 72 PPM 096264 06:37:27.2 +24:35:27 6.5 1.69 72 PPM 096508 06:46:10.3 +23:22:17 7.4 0.91 70 PPM 096499 06:45:37.0 +24:07:36 8.7 0.23 70 PPM 096470 06:44:34.2 +24:05:37 11.0 0.13 70 98WY31 06:44:41.5 +24:13:07 13.8 70 Positions are for J2000
Event circumstances last updated at 2018/06/05 18:20:54 UT
Marc W. Buie, Southwest Research Institute