Event between (119315) 01SQ73 and star UC4-655-045390 with event index number of 170072
Geocentric closest approach at 2017/11/19 09:02:53 UTC
J2000 position of star is 06:46:44.1 +40:58:21
Equinox of date position of star is 06:47:55.7 +40:57:11
Stellar brightness R=11.2,
use SENSEUP=8
Star is 141 degrees from the moon.
Moon is 1% illuminated.
TNO apparent brightness V=22.6
[RECON map]
TNO is 19.4 AU from the Sun
and 18.7 AU from the Earth.
The TNO is moving 17.5
km/sec on the sky relative to the star, or,
4.6 arcsec/hr.
The 1-sigma error in the time of the event is 320 seconds.
The 1-sigma cross-track error in the shadow position is
2539 km.
The sky-plane scale is
13569.0 km/arcsec.
The TNO has an absolute magnitude Hv=9.6
Diameter=72.4 km assuming a 5% albedo -- 4.1 sec chord
Diameter=29.6 km assuming a 30% albedo -- 1.7 sec chord
Dynamical classification is CENTAURR
Star training set for 119315, (2017/11/19 09:03UT) Object RA Dec mag sep mel Pollux 07:46:24.5 +27:58:54 1.1 17.65 133 34Bet Aur 06:00:50.5 +44:56:50 1.9 9.50 145 58Psi7Aur 06:52:01.7 +41:45:31 6.0 1.11 140 PPM 049355 06:49:58.2 +40:42:22 8.4 0.45 141 PPM 049340 06:48:47.3 +41:02:33 9.5 0.18 141 119315 06:47:59.4 +40:57:07 11.2 141 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
2.8 sigma about the mid-time.
The median site spacing is 26.9 km
RECON observability=1.0 and success probability=18.3%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Oroville | 09:04:57 | -56.3 | Dark | Down | 69.9 | 103.4 | Up | 08:49:57 - 09:19:57 | 1587 |
| Tonasket | 09:04:57 | -56.5 | Dark | Down | 69.9 | 102.8 | Up | 08:49:57 - 09:19:57 | 1561 |
| Okanogan | 09:04:57 | -56.8 | Dark | Down | 69.9 | 101.7 | Up | 08:49:57 - 09:19:57 | 1523 |
| Brewster | 09:04:59 | -57.1 | Dark | Down | 69.8 | 100.8 | Up | 08:49:59 - 09:19:59 | 1491 |
| Manson/Chelan | 09:05:00 | -57.4 | Dark | Down | 69.6 | 99.8 | Up | 08:50:00 - 09:20:00 | 1464 |
| Entiat | 09:05:00 | -57.7 | Dark | Down | 69.6 | 99.2 | Up | 08:50:00 - 09:20:00 | 1439 |
| Wenatchee | 09:05:00 | -57.9 | Dark | Down | 69.6 | 98.4 | Up | 08:50:00 - 09:20:00 | 1410 |
| Ellensburg | 09:05:01 | -58.3 | Dark | Down | 69.5 | 97.1 | Up | 08:50:01 - 09:20:01 | 1363 |
| Yakima | 09:05:01 | -58.7 | Dark | Down | 69.5 | 96.0 | Up | 08:50:01 - 09:20:01 | 1318 |
| Toppenish/White Swan | 09:05:00 | -58.8 | Dark | Down | 69.7 | 95.5 | Up | 08:50:00 - 09:20:00 | 1295 |
| Pasco | 09:04:54 | -58.3 | Dark | Down | 70.6 | 96.4 | Up | 08:49:54 - 09:19:54 | 1295 |
| PNWRO | 09:04:53 | -58.4 | Dark | Down | 70.7 | 95.9 | Up | 08:49:53 - 09:19:53 | 1270 |
| George/Umatilla | 09:04:55 | -58.7 | Dark | Down | 70.4 | 95.2 | Up | 08:49:55 - 09:19:55 | 1256 |
| Goldendale | 09:05:01 | -59.4 | Dark | Down | 69.4 | 93.7 | Up | 08:50:01 - 09:20:01 | 1230 |
| The Dalles | 09:05:02 | -59.7 | Dark | Down | 69.2 | 92.8 | Up | 08:50:02 - 09:20:02 | 1202 |
| Maupin | 09:05:01 | -60.0 | Dark | Down | 69.3 | 91.8 | Up | 08:50:01 - 09:20:01 | 1157 |
| Madras/Culver | 09:05:01 | -60.4 | Dark | Down | 69.3 | 90.3 | Up | 08:50:01 - 09:20:01 | 1096 |
| Redmond | 09:05:01 | -60.7 | Dark | Down | 69.2 | 89.3 | Up | 08:50:01 - 09:20:01 | 1056 |
| Sisters | 09:05:03 | -60.9 | Dark | Down | 68.9 | 89.1 | Up | 08:50:03 - 09:20:03 | 1055 |
| Bend | 09:05:01 | -61.0 | Dark | Down | 69.1 | 88.7 | Up | 08:50:01 - 09:20:01 | 1031 |
| Oregon Observatory | 09:05:02 | -61.2 | Dark | Down | 69.0 | 88.1 | Up | 08:50:02 - 09:20:02 | 1011 |
| La Pine/Gilchrist | 09:05:02 | -61.4 | Dark | Down | 69.0 | 87.6 | Up | 08:50:02 - 09:20:02 | 988 |
| North Lake | 09:04:59 | -61.4 | Dark | Down | 69.4 | 86.8 | Up | 08:49:59 - 09:19:59 | 946 |
| Paisley | 09:04:57 | -61.7 | Dark | Down | 69.6 | 85.5 | Up | 08:49:57 - 09:19:57 | 888 |
| Niwot | 09:03:45 | -54.1 | Dark | Down | 80.6 | 80.7 | Up | 08:48:45 - 09:18:45 | 884 |
| Chiloquin | 09:05:03 | -62.4 | Dark | Down | 68.6 | 84.5 | Up | 08:50:03 - 09:20:03 | 862 |
| Lakeview | 09:04:56 | -62.0 | Dark | Down | 69.7 | 84.2 | Up | 08:49:56 - 09:19:56 | 834 |
| Klamath Falls | 09:05:02 | -62.6 | Dark | Down | 68.7 | 83.7 | Up | 08:50:02 - 09:20:02 | 825 |
| Tulelake | 09:05:01 | -62.7 | Dark | Down | 68.9 | 83.1 | Up | 08:50:01 - 09:20:01 | 798 |
| Cedarville | 09:04:54 | -62.4 | Dark | Down | 69.7 | 82.5 | Up | 08:49:54 - 09:19:54 | 764 |
| Fall River/Burney | 09:05:00 | -63.3 | Dark | Down | 68.8 | 80.8 | Up | 08:50:00 - 09:20:00 | 699 |
| Susanville | 09:04:56 | -63.4 | Dark | Down | 69.2 | 79.4 | Up | 08:49:56 - 09:19:56 | 637 |
| Gimple | 09:04:56 | -63.7 | Dark | Down | 69.0 | 78.7 | Up | 08:49:56 - 09:19:56 | 605 |
| Greenville | 09:04:57 | -63.8 | Dark | Down | 68.9 | 78.6 | Up | 08:49:57 - 09:19:57 | 604 |
| Quincy | 09:04:57 | -63.9 | Dark | Down | 68.9 | 78.1 | Up | 08:49:57 - 09:19:57 | 582 |
| Portola | 09:04:54 | -63.8 | Dark | Down | 69.2 | 77.9 | Up | 08:49:54 - 09:19:54 | 573 |
| Reno | 09:04:51 | -63.6 | Dark | Down | 69.7 | 77.3 | Up | 08:49:51 - 09:19:51 | 551 |
| Carson City | 09:04:50 | -63.8 | Dark | Down | 69.6 | 76.4 | Up | 08:49:50 - 09:19:50 | 512 |
| Yerington | 09:04:47 | -63.6 | Dark | Down | 70.0 | 76.0 | Up | 08:49:47 - 09:19:47 | 498 |
| Gardnerville | 09:04:50 | -64.0 | Dark | Down | 69.6 | 75.8 | Up | 08:49:50 - 09:19:50 | 486 |
| Hawthorne | 09:04:44 | -63.6 | Dark | Down | 70.3 | 74.8 | Up | 08:49:44 - 09:19:44 | 454 |
| Tonopah | 09:04:37 | -63.0 | Dark | Down | 71.2 | 73.5 | Up | 08:49:37 - 09:19:37 | 422 |
| Lee Vining | 09:04:46 | -64.2 | Dark | Down | 69.8 | 73.3 | Up | 08:49:46 - 09:19:46 | 386 |
| Bishop | 09:04:42 | -64.2 | Dark | Down | 70.1 | 71.7 | Up | 08:49:42 - 09:19:42 | 331 |
| Beatty | 09:04:33 | -63.4 | Dark | Down | 71.2 | 70.2 | Up | 08:49:33 - 09:19:33 | 304 |
| Indian Springs | 09:04:28 | -62.9 | Dark | Down | 71.9 | 69.0 | Up | 08:49:28 - 09:19:28 | 285 |
| Lone Pine | 09:04:39 | -64.4 | Dark | Down | 70.1 | 69.6 | Up | 08:49:39 - 09:19:39 | 253 |
| Henderson | 09:04:25 | -62.7 | Dark | Down | 72.2 | 67.3 | Up | 08:49:25 - 09:19:25 | 239 |
| Patrick | 09:04:18 | -62.2 | Dark | Down | 72.7 | 65.0 | Up | 08:49:18 - 09:19:18 | 192 |
| Searchlight/Boulder City | 09:04:23 | -63.0 | Dark | Down | 72.0 | 65.6 | Up | 08:49:23 - 09:19:23 | 179 |
| DCO | 09:04:14 | -61.9 | Dark | Down | 73.1 | 63.7 | Up | 08:49:14 - 09:19:14 | 172 |
| Kingman/Dolan Springs | 09:04:19 | -62.5 | Dark | Down | 72.5 | 64.4 | Up | 08:49:19 - 09:19:19 | 165 |
| Laughlin/Bullhead City | 09:04:21 | -62.9 | Dark | Down | 72.1 | 64.6 | Up | 08:49:21 - 09:19:21 | 154 |
| Mohave Valley | 09:04:21 | -63.0 | Dark | Down | 72.0 | 63.9 | Up | 08:49:21 - 09:19:21 | 124 |
| Lake Havasu City | 09:04:19 | -63.0 | Dark | Down | 72.0 | 62.6 | Up | 08:49:19 - 09:19:19 | 86 |
| CPSLO | 09:04:50 | -66.9 | Dark | Down | 67.7 | 67.0 | Up | 08:49:50 - 09:19:50 | 81 |
| Parker | 09:04:18 | -63.1 | Dark | Down | 71.8 | 61.7 | Up | 08:49:18 - 09:19:18 | 49 |
| Blythe | 09:04:19 | -63.6 | Dark | Down | 71.4 | 60.5 | Up | 08:49:19 - 09:19:19 | -15 |
| Wildwood | 09:04:39 | -66.2 | Dark | Down | 68.7 | 63.7 | Up | 08:49:39 - 09:19:39 | -28 |
| Idyllwild | 09:04:29 | -65.1 | Dark | Down | 69.9 | 62.0 | Up | 08:49:29 - 09:19:29 | -36 |
| Calipatria | 09:04:23 | -64.5 | Dark | Down | 70.5 | 59.8 | Up | 08:49:23 - 09:19:23 | -81 |
| Yuma | 09:04:18 | -64.0 | Dark | Down | 70.9 | 58.2 | Up | 08:49:18 - 09:19:18 | -112 |
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 119315, (2017/11/19 09:03UT) Object RA Dec mag sep mel Pollux 07:45:18.1 +28:01:33 1.1 17.65 133 34Bet Aur 05:59:31.6 +44:56:51 1.9 9.50 145 58Psi7Aur 06:50:45.9 +41:46:50 6.0 1.11 140 PPM 049355 06:48:43.1 +40:43:38 8.4 0.45 141 PPM 049340 06:47:31.9 +41:03:48 9.5 0.18 141 119315 06:46:44.1 +40:58:21 11.2 141 Positions are for J2000
Event circumstances last updated at 2017/01/01 19:02:11 UT
Marc W. Buie, Southwest Research Institute