Event between 09DL143 and star UC4-478-053706 with event index number of 79102
Geocentric closest approach at 2017/04/13 12:06:51 UTC
J2000 position of star is 13:02:04.9 +05:26:42
Equinox of date position of star is 13:02:53.2 +05:21:35
Stellar brightness R=16.5
Star is 37 degrees from the moon.
Moon is 95% illuminated.
TNO apparent brightness V=24.4
[RECON map]
TNO is 44.4 AU from the Sun
and 43.5 AU from the Earth.
The TNO is moving 24.8
km/sec on the sky relative to the star, or,
2.8 arcsec/hr.
The 1-sigma error in the time of the event is 443 seconds.
The 1-sigma cross-track error in the shadow position is
4458 km.
The TNO has an absolute magnitude Hv=7.9
Diameter=155.6 km assuming a 5% albedo -- 6.3 sec chord
Diameter=63.5 km assuming a 30% albedo -- 2.6 sec chord
Dynamical classification is CLASSICAL
Star training set for 09DL143, (2017/04/13 12:07UT) Object RA Dec mag sep mel Spica 13:26:06.4 -11:15:04 1.0 17.57 26 Vindemiatrix 13:03:02.3 +10:52:00 2.8 5.51 40 43Del Vir 12:56:28.5 +03:18:14 3.4 2.61 37 PPM 159401 13:02:00.8 +04:15:57 7.5 1.11 37 PPM 159423 13:03:30.6 +05:05:35 9.9 0.29 37 09DL143 13:02:57.5 +05:21:08 16.5 37 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 17.2 km
RECON observability=0.2 and success probability=0.1%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Oroville | 12:05:29 | -10.7 | CT | Up | 18.3 | 256.9 | Really Low | 11:28:02 - 12:42:56 | 15663 |
| Tonasket | 12:05:28 | -10.8 | CT | Up | 18.3 | 257.0 | Really Low | 11:28:01 - 12:42:55 | 15653 |
| Okanogan | 12:05:27 | -11.0 | CT | Up | 18.5 | 257.0 | Really Low | 11:28:00 - 12:42:54 | 15636 |
| Brewster | 12:05:25 | -11.3 | CT | Up | 18.7 | 256.9 | Really Low | 11:27:58 - 12:42:52 | 15621 |
| Manson/Chelan | 12:05:26 | -11.6 | CT | Up | 19.0 | 256.6 | Really Low | 11:27:59 - 12:42:53 | 15606 |
| Entiat | 12:05:25 | -11.8 | CT | Up | 19.1 | 256.7 | Really Low | 11:27:58 - 12:42:52 | 15594 |
| Wenatchee | 12:05:24 | -11.9 | CT | Up | 19.2 | 256.7 | Really Low | 11:27:57 - 12:42:51 | 15581 |
| Ellensburg | 12:05:23 | -12.3 | AT | Up | 19.5 | 256.6 | Really Low | 11:27:56 - 12:42:50 | 15558 |
| Yakima | 12:05:21 | -12.5 | AT | Up | 19.6 | 256.8 | Really Low | 11:27:54 - 12:42:48 | 15539 |
| Toppenish/White Swan | 12:05:19 | -12.5 | AT | Up | 19.5 | 257.0 | Really Low | 11:27:52 - 12:42:46 | 15531 |
| Pasco | 12:05:18 | -11.8 | CT | Up | 18.7 | 258.0 | Really Low | 11:27:51 - 12:42:45 | 15546 |
| Pacific NW Region. Obs. | 12:05:17 | -11.7 | CT | Up | 18.6 | 258.2 | Really Low | 11:27:50 - 12:42:44 | 15539 |
| Umatilla | 12:05:17 | -12.1 | AT | Up | 18.9 | 257.9 | Really Low | 11:27:50 - 12:42:44 | 15527 |
| Goldendale | 12:05:18 | -13.0 | AT | Up | 19.9 | 256.8 | Really Low | 11:27:51 - 12:42:45 | 15498 |
| The Dalles | 12:05:18 | -13.3 | AT | Up | 20.2 | 256.6 | Low | 11:27:51 - 12:42:45 | 15480 |
| Maupin | 12:05:15 | -13.5 | AT | Up | 20.3 | 256.8 | Low | 11:27:48 - 12:42:42 | 15461 |
| Madras/Culver | 12:05:13 | -13.8 | AT | Up | 20.4 | 257.0 | Low | 11:27:46 - 12:42:40 | 15433 |
| Sisters | 12:05:13 | -14.2 | AT | Up | 20.8 | 256.8 | Low | 11:27:46 - 12:42:40 | 15408 |
| Redmond | 12:05:13 | -14.0 | AT | Up | 20.5 | 257.1 | Low | 11:27:46 - 12:42:40 | 15414 |
| Bend | 12:05:11 | -14.2 | AT | Up | 20.7 | 257.0 | Low | 11:27:44 - 12:42:38 | 15400 |
| Oregon Observatory | 12:05:08 | -14.3 | AT | Up | 20.8 | 257.0 | Low | 11:27:41 - 12:42:35 | 15389 |
| LaPine/Gilchrist | 12:05:10 | -14.5 | AT | Up | 20.9 | 257.0 | Low | 11:27:43 - 12:42:37 | 15377 |
| North Lake | 12:05:08 | -14.3 | AT | Up | 20.6 | 257.6 | Low | 11:27:41 - 12:42:35 | 15365 |
| Paisley | 12:05:06 | -14.3 | AT | Up | 20.4 | 258.1 | Low | 11:27:39 - 12:42:33 | 15342 |
| Chiloquin | 12:05:06 | -15.2 | AT | Up | 21.4 | 257.2 | Low | 11:27:39 - 12:42:33 | 15311 |
| Klamath Falls | 12:05:06 | -15.3 | AT | Up | 21.4 | 257.4 | Low | 11:27:39 - 12:42:33 | 15294 |
| Lakeview | 12:05:04 | -14.4 | AT | Up | 20.4 | 258.4 | Low | 11:27:37 - 12:42:31 | 15318 |
| Tulelake | 12:05:03 | -15.3 | AT | Up | 21.3 | 257.7 | Low | 11:27:36 - 12:42:30 | 15285 |
| Cedarville | 12:05:01 | -14.6 | AT | Up | 20.4 | 258.8 | Low | 11:27:34 - 12:42:28 | 15285 |
| Fall River/Burney | 12:05:01 | -15.7 | AT | Up | 21.4 | 258.1 | Low | 11:27:34 - 12:42:28 | 15235 |
| Susanville | 12:04:58 | -15.5 | AT | Up | 21.0 | 258.8 | Low | 11:27:31 - 12:42:25 | 15213 |
| Greenville | 12:04:56 | -15.8 | AT | Up | 21.3 | 258.7 | Low | 11:27:29 - 12:42:23 | 15191 |
| Niwot | 12:04:47 | -4.6 | CT | Up | 9.3 | 269.3 | Really Low | 11:27:20 - 12:42:14 | 15429 |
| Quincy | 12:04:56 | -15.9 | AT | Up | 21.3 | 258.8 | Low | 11:27:29 - 12:42:23 | 15179 |
| Portola | 12:04:56 | -15.6 | AT | Up | 21.0 | 259.2 | Low | 11:27:29 - 12:42:23 | 15181 |
| Reno | 12:04:51 | -15.3 | AT | Up | 20.6 | 259.7 | Low | 11:27:24 - 12:42:18 | 15177 |
| Carson City | 12:04:52 | -15.4 | AT | Up | 20.6 | 259.9 | Low | 11:27:25 - 12:42:19 | 15157 |
| Yerington | 12:04:50 | -15.1 | AT | Up | 20.2 | 260.4 | Low | 11:27:23 - 12:42:17 | 15157 |
| Gardnerville | 12:04:51 | -15.5 | AT | Up | 20.6 | 260.0 | Low | 11:27:24 - 12:42:18 | 15143 |
| Hawthorne | 12:04:48 | -14.9 | AT | Up | 19.8 | 260.9 | Really Low | 11:27:21 - 12:42:15 | 15138 |
| Lee Vining | 12:04:47 | -15.5 | AT | Up | 20.3 | 260.8 | Low | 11:27:20 - 12:42:14 | 15096 |
| Tonopah | 12:04:45 | -14.1 | AT | Up | 18.8 | 262.0 | Really Low | 11:27:18 - 12:42:12 | 15136 |
| Bishop | 12:04:43 | -15.2 | AT | Up | 19.8 | 261.5 | Really Low | 11:27:16 - 12:42:10 | 15072 |
| Lone Pine | 12:04:41 | -15.3 | AT | Up | 19.7 | 261.9 | Really Low | 11:27:14 - 12:42:08 | 15030 |
| Beatty | 12:04:41 | -14.3 | AT | Up | 18.6 | 262.7 | Really Low | 11:27:14 - 12:42:08 | 15072 |
| Indian Springs | 12:04:38 | -13.6 | AT | Up | 17.8 | 263.4 | Really Low | 11:27:11 - 12:42:05 | 15071 |
| Henderson | 12:04:36 | -13.3 | AT | Up | 17.3 | 264.0 | Really Low | 11:27:09 - 12:42:03 | 15049 |
| Searchlight/Boulder City | 12:04:34 | -13.5 | AT | Up | 17.3 | 264.2 | Really Low | 11:27:07 - 12:42:01 | 15013 |
| San Luis Obispo | 12:04:37 | -17.8 | AT | Up | 22.0 | 260.8 | Low | 11:27:10 - 12:42:04 | 14896 |
| Kingman/Dolan Springs | 12:04:31 | -12.9 | AT | Up | 16.7 | 264.8 | Really Low | 11:27:04 - 12:41:58 | 15010 |
| Laughlin/Bullhead City | 12:04:32 | -13.3 | AT | Up | 17.1 | 264.5 | Really Low | 11:27:05 - 12:41:59 | 14999 |
| DCO | 12:04:30 | -12.3 | AT | Up | 15.9 | 265.4 | Really Low | 11:27:03 - 12:41:57 | 15020 |
| Mohave Valley | 12:04:31 | -13.4 | AT | Up | 17.1 | 264.6 | Really Low | 11:27:04 - 12:41:58 | 14982 |
| Lake Havasu City | 12:04:29 | -13.4 | AT | Up | 16.9 | 264.9 | Really Low | 11:27:02 - 12:41:56 | 14960 |
| Parker | 12:04:28 | -13.5 | AT | Up | 17.0 | 265.0 | Really Low | 11:27:01 - 12:41:55 | 14937 |
| Idyllwild | 12:04:27 | -15.5 | AT | Up | 19.0 | 263.7 | Really Low | 11:27:00 - 12:41:54 | 14869 |
| Blythe | 12:04:27 | -13.9 | AT | Up | 17.3 | 265.0 | Really Low | 11:27:00 - 12:41:54 | 14898 |
| Calipatria | 12:04:25 | -14.8 | AT | Up | 18.1 | 264.6 | Really Low | 11:26:58 - 12:41:52 | 14848 |
| Yuma | 12:04:21 | -14.3 | AT | Up | 17.4 | 265.2 | Really Low | 11:26:54 - 12:41:48 | 14834 |
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.
Event circumstances last updated at 2015/11/22 21:28:00 UT
Marc W. Buie, Southwest Research Institute