Event between (342842) 08YB3 and star UC4-831-022572 with event index number of 65252
Geocentric closest approach at 2017/04/19 05:47:38 UTC
J2000 position of star is 22:52:39.6 +76:02:03
Equinox of date position of star is 22:53:05.3 +76:07:28
Stellar brightness R=16.6
Star is 98 degrees from the moon.
Moon is 52% illuminated.
TNO apparent brightness V=20.1
[RECON map]
TNO is 10.8 AU from the Sun
and 11.1 AU from the Earth.
The TNO is moving 20.9
km/sec on the sky relative to the star, or,
9.3 arcsec/hr.
The 1-sigma error in the time of the event is 37 seconds.
The 1-sigma cross-track error in the shadow position is
806 km.
The sky-plane scale is
8053.1 km/arcsec.
The TNO has an absolute magnitude Hv=9.3
Diameter=83.2 km assuming a 5% albedo -- 4.0 sec chord
Diameter=34.0 km assuming a 30% albedo -- 1.6 sec chord
Dynamical classification is CENTAURR
Star training set for 342842, (2017/04/19 05:48UT) Object RA Dec mag sep mel Deneb 20:42:01.3 +45:20:34 1.3 33.67 64 PPM 000431 02:53:18.8 +89:20:14 2.0 13.55 108 33Pi Cep 23:08:27.2 +75:28:52 5.3 1.14 98 PPM 011372 22:50:21.6 +75:15:15 8.0 0.89 97 PPM 011401 22:54:35.1 +75:40:22 10.0 0.46 97 PPM 011408 22:55:05.8 +76:15:27 10.5 0.18 98 342842 22:53:05.8 +76:07:35 16.6 98 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 12.3 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) |
| Niwot | 05:49:54 | -36.2 | Dark | Down | 27.4 | 7.0 | Low | 05:46:17 - 05:53:31 | 6545 |
| Yuma | 05:50:32 | -39.2 | Dark | Down | 19.3 | 4.4 | Really Low | 05:46:55 - 05:54:09 | 6422 |
| DCO | 05:50:25 | -37.8 | Dark | Down | 21.8 | 4.8 | Low | 05:46:48 - 05:54:02 | 6412 |
| Blythe | 05:50:31 | -38.4 | Dark | Down | 20.2 | 4.4 | Low | 05:46:54 - 05:54:08 | 6391 |
| Parker | 05:50:29 | -38.1 | Dark | Down | 20.8 | 4.5 | Low | 05:46:52 - 05:54:06 | 6388 |
| Lake Havasu City | 05:50:29 | -37.8 | Dark | Down | 21.1 | 4.5 | Low | 05:46:52 - 05:54:06 | 6374 |
| Patrick | 05:50:26 | -37.2 | Dark | Down | 22.0 | 4.6 | Low | 05:46:49 - 05:54:03 | 6363 |
| Kingman/Dolan Springs | 05:50:28 | -37.4 | Dark | Down | 21.8 | 4.6 | Low | 05:46:51 - 05:54:05 | 6362 |
| Calipatria | 05:50:34 | -38.4 | Dark | Down | 19.7 | 4.2 | Really Low | 05:46:57 - 05:54:11 | 6357 |
| Mohave Valley | 05:50:29 | -37.4 | Dark | Down | 21.5 | 4.5 | Low | 05:46:52 - 05:54:06 | 6346 |
| Laughlin/Bullhead City | 05:50:29 | -37.1 | Dark | Down | 21.8 | 4.5 | Low | 05:46:52 - 05:54:06 | 6335 |
| Searchlight/Boulder City | 05:50:31 | -36.7 | Dark | Down | 22.0 | 4.4 | Low | 05:46:54 - 05:54:08 | 6306 |
| Henderson | 05:50:30 | -36.2 | Dark | Down | 22.6 | 4.4 | Low | 05:46:53 - 05:54:07 | 6280 |
| Idyllwild | 05:50:38 | -37.3 | Dark | Down | 20.2 | 3.9 | Low | 05:47:01 - 05:54:15 | 6271 |
| Indian Springs | 05:50:32 | -35.5 | Dark | Down | 23.1 | 4.2 | Low | 05:46:55 - 05:54:09 | 6223 |
| Beatty | 05:50:36 | -34.7 | Dark | Down | 23.4 | 4.0 | Low | 05:46:59 - 05:54:13 | 6151 |
| Wildwood | 05:50:44 | -36.1 | Dark | Down | 20.5 | 3.4 | Low | 05:47:07 - 05:54:21 | 6149 |
| Lone Pine | 05:50:40 | -34.4 | Dark | Down | 23.0 | 3.6 | Low | 05:47:03 - 05:54:17 | 6091 |
| Tonopah | 05:50:36 | -33.6 | Dark | Down | 24.5 | 3.9 | Low | 05:46:59 - 05:54:13 | 6081 |
| Bishop | 05:50:40 | -33.6 | Dark | Down | 23.7 | 3.6 | Low | 05:47:03 - 05:54:17 | 6043 |
| CPSLO | 05:50:51 | -34.1 | Dark | Down | 21.6 | 2.9 | Low | 05:47:14 - 05:54:28 | 5985 |
| Hawthorne | 05:50:40 | -32.5 | Dark | Down | 24.9 | 3.5 | Low | 05:47:03 - 05:54:17 | 5985 |
| Lee Vining | 05:50:41 | -32.8 | Dark | Down | 24.3 | 3.4 | Low | 05:47:04 - 05:54:18 | 5980 |
| Yerington | 05:50:40 | -31.9 | Dark | Down | 25.3 | 3.4 | Low | 05:47:03 - 05:54:17 | 5937 |
| Gardnerville | 05:50:43 | -31.7 | Dark | Down | 25.2 | 3.3 | Low | 05:47:06 - 05:54:20 | 5906 |
| Carson City | 05:50:42 | -31.5 | Dark | Down | 25.5 | 3.3 | Low | 05:47:05 - 05:54:19 | 5893 |
| Reno | 05:50:42 | -31.2 | Dark | Down | 25.8 | 3.3 | Low | 05:47:05 - 05:54:19 | 5878 |
| Portola | 05:50:44 | -30.7 | Dark | Down | 26.1 | 3.1 | Low | 05:47:07 - 05:54:21 | 5831 |
| Quincy | 05:50:44 | -30.3 | Dark | Down | 26.2 | 3.0 | Low | 05:47:07 - 05:54:21 | 5798 |
| Susanville | 05:50:43 | -30.1 | Dark | Down | 26.7 | 3.1 | Low | 05:47:06 - 05:54:20 | 5796 |
| Gimple | 05:50:44 | -30.2 | Dark | Down | 26.4 | 3.0 | Low | 05:47:07 - 05:54:21 | 5795 |
| Greenville | 05:50:45 | -30.2 | Dark | Down | 26.4 | 3.0 | Low | 05:47:08 - 05:54:22 | 5790 |
| Cedarville | 05:50:40 | -29.4 | Dark | Down | 27.8 | 3.2 | Low | 05:47:03 - 05:54:17 | 5776 |
| Lakeview | 05:50:40 | -28.8 | Dark | Down | 28.5 | 3.2 | Low | 05:47:03 - 05:54:17 | 5738 |
| Fall River/Burney | 05:50:45 | -29.3 | Dark | Down | 27.3 | 2.9 | Low | 05:47:08 - 05:54:22 | 5728 |
| Paisley | 05:50:40 | -28.3 | Dark | Down | 29.0 | 3.1 | Low | 05:47:03 - 05:54:17 | 5706 |
| Tulelake | 05:50:44 | -28.5 | Dark | Down | 28.2 | 2.9 | Low | 05:47:07 - 05:54:21 | 5686 |
| North Lake | 05:50:40 | -27.7 | Dark | Down | 29.5 | 3.1 | Low | 05:47:03 - 05:54:17 | 5662 |
| Klamath Falls | 05:50:44 | -28.2 | Dark | Down | 28.4 | 2.8 | Low | 05:47:07 - 05:54:21 | 5658 |
| Chiloquin | 05:50:44 | -27.9 | Dark | Down | 28.8 | 2.8 | Low | 05:47:07 - 05:54:21 | 5639 |
| PNWRO | 05:50:30 | -26.3 | Dark | Down | 32.3 | 3.7 | Up | 05:46:53 - 05:54:07 | 5637 |
| George/Umatilla | 05:50:31 | -26.2 | Dark | Down | 32.2 | 3.6 | Up | 05:46:54 - 05:54:08 | 5619 |
| Pasco | 05:50:31 | -26.0 | Dark | Down | 32.6 | 3.7 | Up | 05:46:54 - 05:54:08 | 5613 |
| La Pine/Gilchrist | 05:50:41 | -27.1 | Dark | Down | 29.9 | 2.9 | Low | 05:47:04 - 05:54:18 | 5610 |
| Oregon Observatory | 05:50:40 | -27.0 | Dark | Down | 30.1 | 2.9 | Up | 05:47:03 - 05:54:17 | 5604 |
| Bend | 05:50:39 | -26.9 | Dark | Down | 30.3 | 3.0 | Up | 05:47:02 - 05:54:16 | 5604 |
| Redmond | 05:50:39 | -26.8 | Dark | Down | 30.5 | 3.0 | Up | 05:47:02 - 05:54:16 | 5602 |
| Madras/Culver | 05:50:38 | -26.5 | Dark | Down | 30.9 | 3.0 | Up | 05:47:01 - 05:54:15 | 5588 |
| Sisters | 05:50:40 | -26.6 | Dark | Down | 30.5 | 2.9 | Up | 05:47:03 - 05:54:17 | 5579 |
| Maupin | 05:50:37 | -26.1 | Dark | Down | 31.4 | 3.1 | Up | 05:47:00 - 05:54:14 | 5565 |
| Goldendale | 05:50:36 | -25.7 | Dark | Down | 32.1 | 3.2 | Up | 05:46:59 - 05:54:13 | 5548 |
| Toppenish/White Swan | 05:50:33 | -25.4 | Dark | Down | 32.6 | 3.3 | Up | 05:46:56 - 05:54:10 | 5544 |
| The Dalles | 05:50:37 | -25.7 | Dark | Down | 31.8 | 3.1 | Up | 05:47:00 - 05:54:14 | 5540 |
| Yakima | 05:50:33 | -25.2 | Dark | Down | 32.8 | 3.3 | Up | 05:46:56 - 05:54:10 | 5525 |
| Ellensburg | 05:50:32 | -24.9 | Dark | Down | 33.3 | 3.3 | Up | 05:46:55 - 05:54:09 | 5506 |
| Wenatchee | 05:50:31 | -24.6 | Dark | Down | 33.7 | 3.4 | Up | 05:46:54 - 05:54:08 | 5496 |
| Entiat | 05:50:30 | -24.4 | Dark | Down | 33.9 | 3.4 | Up | 05:46:53 - 05:54:07 | 5489 |
| Brewster | 05:50:29 | -24.3 | Dark | Down | 34.4 | 3.5 | Up | 05:46:52 - 05:54:06 | 5489 |
| Okanogan | 05:50:28 | -24.1 | Dark | Down | 34.7 | 3.6 | Up | 05:46:51 - 05:54:05 | 5485 |
| Manson/Chelan | 05:50:30 | -24.3 | Dark | Down | 34.2 | 3.4 | Up | 05:46:53 - 05:54:07 | 5481 |
| Tonasket | 05:50:28 | -23.9 | Dark | Down | 35.0 | 3.7 | Up | 05:46:51 - 05:54:05 | 5475 |
| Oroville | 05:50:26 | -23.7 | Dark | Down | 35.2 | 3.7 | Up | 05:46:49 - 05:54:03 | 5462 |
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 342842, (2017/04/19 05:48UT) Object RA Dec mag sep mel Deneb 20:41:25.9 +45:16:49 1.3 33.67 64 PPM 000431 02:31:52.1 +89:15:50 2.0 13.55 108 33Pi Cep 23:07:54.0 +75:23:15 5.3 1.14 98 PPM 011372 22:49:54.7 +75:09:44 8.0 0.89 97 PPM 011401 22:54:07.4 +75:34:50 10.0 0.46 97 PPM 011408 22:54:39.0 +76:09:54 10.5 0.18 98 342842 22:52:39.6 +76:02:03 16.6 98 Positions are for J2000
Event circumstances last updated at 2016/12/03 17:26:53 UT
Marc W. Buie, Southwest Research Institute