Event between (307261) 02MS4 and star GA0820:13971093 with event index number of 184262
Geocentric closest approach at 2019/03/22 10:32:05 UTC
J2000 position of star is 18:49:26.3 -06:46:38
Equinox of date position of star is 18:50:26.9 -06:45:17
Stellar brightness G=13.5,
use SENSEUP=32
Star is 81 degrees from the moon.
Moon is 97% illuminated.
TNO apparent brightness V=20.4
[RECON map]
TNO is 46.6 AU from the Sun
and 46.8 AU from the Earth.
The TNO is moving 13.6
km/sec on the sky relative to the star, or,
1.4 arcsec/hr.
The 1-sigma error in the time of the event is 233 seconds.
The 1-sigma cross-track error in the shadow position is
3220 km.
The sky-plane scale is
33937.3 km/arcsec.
The TNO has an absolute magnitude Hv=3.6
Diameter=1148.2 km assuming a 5% albedo -- 84.5 sec chord
Diameter=468.7 km assuming a 30% albedo -- 34.5 sec chord
Dynamical classification is SCATEXTD
Star training set for 307261, (2019/03/22 10:32UT) Object RA Dec mag sep mel Antares 16:30:35.3 -26:28:23 0.9 38.66 50 Nunki 18:56:27.3 -26:16:16 2.0 19.57 82 PPM 202138 18:48:30.5 -05:40:59 4.6 1.18 81 PPM 202153 18:49:38.0 -07:06:35 8.4 0.41 81 PPM 202177 18:50:45.4 -06:47:54 9.7 0.08 81 307261 18:50:28.4 -06:45:15 13.5 81 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
3.9 sigma about the mid-time.
The median site spacing is 6.7 km
RECON observability=0.2 and success probability=0.8%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Sisters | 10:32:28 | -35.5 | Dark | Up | 11.8 | 111.9 | Really Low | 10:17:28 - 10:47:28 | 5647 |
| The Dalles | 10:32:37 | -34.3 | Dark | Up | 11.6 | 112.4 | Really Low | 10:17:37 - 10:47:37 | 5644 |
| La Pine/Gilchrist | 10:32:18 | -35.9 | Dark | Up | 12.1 | 111.8 | Really Low | 10:17:18 - 10:47:18 | 5643 |
| Oregon Observatory | 10:32:22 | -35.7 | Dark | Up | 12.0 | 111.9 | Really Low | 10:17:22 - 10:47:22 | 5643 |
| Chiloquin | 10:32:13 | -36.9 | Dark | Up | 12.2 | 111.3 | Really Low | 10:17:13 - 10:47:13 | 5643 |
| Bend | 10:32:25 | -35.5 | Dark | Up | 12.1 | 112.0 | Really Low | 10:17:25 - 10:47:25 | 5642 |
| Maupin | 10:32:33 | -34.6 | Dark | Up | 11.8 | 112.4 | Really Low | 10:17:33 - 10:47:33 | 5641 |
| Madras/Culver | 10:32:30 | -35.0 | Dark | Up | 12.0 | 112.3 | Really Low | 10:17:30 - 10:47:30 | 5641 |
| Redmond | 10:32:27 | -35.3 | Dark | Up | 12.1 | 112.2 | Really Low | 10:17:27 - 10:47:27 | 5640 |
| Klamath Falls | 10:32:08 | -37.1 | Dark | Up | 12.4 | 111.2 | Really Low | 10:17:08 - 10:47:08 | 5639 |
| Goldendale | 10:32:39 | -34.0 | Dark | Up | 11.8 | 112.8 | Really Low | 10:17:39 - 10:47:39 | 5638 |
| Yakima | 10:32:44 | -33.3 | Dark | Up | 11.6 | 113.1 | Really Low | 10:17:44 - 10:47:44 | 5634 |
| Ellensburg | 10:32:49 | -33.0 | Dark | Up | 11.5 | 113.2 | Really Low | 10:17:49 - 10:47:49 | 5633 |
| Tulelake | 10:32:05 | -37.1 | Dark | Up | 12.7 | 111.4 | Really Low | 10:17:05 - 10:47:05 | 5632 |
| Toppenish/White Swan | 10:32:46 | -33.4 | Dark | Up | 11.8 | 113.2 | Really Low | 10:17:46 - 10:47:46 | 5631 |
| North Lake | 10:32:20 | -35.9 | Dark | Up | 12.6 | 112.1 | Really Low | 10:17:20 - 10:47:20 | 5631 |
| Wenatchee | 10:32:53 | -32.6 | Dark | Up | 11.5 | 113.5 | Really Low | 10:17:53 - 10:47:53 | 5629 |
| Entiat | 10:32:55 | -32.4 | Dark | Up | 11.4 | 113.6 | Really Low | 10:17:55 - 10:47:55 | 5627 |
| Manson/Chelan | 10:32:56 | -32.2 | Dark | Up | 11.4 | 113.7 | Really Low | 10:17:56 - 10:47:56 | 5625 |
| Fall River/Burney | 10:32:00 | -37.7 | Dark | Up | 13.0 | 111.2 | Really Low | 10:17:00 - 10:47:00 | 5623 |
| Paisley | 10:32:17 | -36.1 | Dark | Up | 13.1 | 112.3 | Really Low | 10:17:17 - 10:47:17 | 5621 |
| Brewster | 10:33:00 | -31.8 | Dark | Up | 11.6 | 114.1 | Really Low | 10:18:00 - 10:48:00 | 5618 |
| Lakeview | 10:32:13 | -36.3 | Dark | Up | 13.4 | 112.3 | Really Low | 10:17:13 - 10:47:13 | 5614 |
| Okanogan | 10:33:02 | -31.5 | Dark | Up | 11.6 | 114.3 | Really Low | 10:18:02 - 10:48:02 | 5614 |
| George/Umatilla | 10:32:41 | -33.2 | Dark | Up | 12.7 | 113.9 | Really Low | 10:17:41 - 10:47:41 | 5613 |
| Tonasket | 10:33:00 | -31.2 | Dark | Up | 11.5 | 114.5 | Really Low | 10:18:00 - 10:48:00 | 5610 |
| Southern Okanagan | 10:33:04 | -31.0 | Dark | Up | 11.3 | 114.5 | Really Low | 10:18:04 - 10:48:04 | 5610 |
| Okanagan Falls | 10:33:09 | -30.8 | Dark | Up | 11.2 | 114.5 | Really Low | 10:18:09 - 10:48:09 | 5609 |
| Oroville | 10:33:07 | -31.1 | Dark | Up | 11.4 | 114.5 | Really Low | 10:18:07 - 10:48:07 | 5609 |
| Pasco | 10:32:44 | -32.8 | Dark | Up | 12.7 | 114.2 | Really Low | 10:17:44 - 10:47:44 | 5609 |
| Penticton | 10:33:08 | -30.7 | Dark | Up | 11.1 | 114.6 | Really Low | 10:18:08 - 10:48:08 | 5608 |
| Cedarville | 10:32:04 | -36.7 | Dark | Up | 13.7 | 112.3 | Really Low | 10:17:04 - 10:47:04 | 5605 |
| Greenville | 10:31:57 | -38.1 | Dark | Up | 13.7 | 111.4 | Really Low | 10:16:57 - 10:46:57 | 5605 |
| PNWRO | 10:32:43 | -32.9 | Dark | Up | 12.9 | 114.3 | Really Low | 10:17:43 - 10:47:43 | 5604 |
| Gimple | 10:31:56 | -38.1 | Dark | Up | 13.7 | 111.4 | Really Low | 10:16:56 - 10:46:56 | 5604 |
| Rutland | 10:33:12 | -30.3 | Dark | Up | 11.1 | 114.8 | Really Low | 10:18:12 - 10:48:12 | 5603 |
| Susanville | 10:31:58 | -37.8 | Dark | Up | 13.8 | 111.6 | Really Low | 10:16:58 - 10:46:58 | 5603 |
| Quincy | 10:31:53 | -38.3 | Dark | Up | 13.8 | 111.3 | Really Low | 10:16:53 - 10:46:53 | 5602 |
| Portola | 10:31:53 | -38.1 | Dark | Up | 14.1 | 111.6 | Really Low | 10:16:53 - 10:46:53 | 5592 |
| Reno | 10:31:50 | -37.9 | Dark | Up | 14.7 | 112.0 | Really Low | 10:16:50 - 10:46:50 | 5577 |
| Carson City | 10:31:51 | -38.1 | Dark | Up | 14.8 | 111.9 | Really Low | 10:16:51 - 10:46:51 | 5571 |
| Gardnerville | 10:31:50 | -38.2 | Dark | Up | 15.0 | 111.9 | Really Low | 10:16:50 - 10:46:50 | 5567 |
| Yerington | 10:31:53 | -37.8 | Dark | Up | 15.4 | 112.3 | Really Low | 10:16:53 - 10:46:53 | 5556 |
| Lee Vining | 10:31:42 | -38.5 | Dark | Up | 15.8 | 112.1 | Really Low | 10:16:42 - 10:46:42 | 5540 |
| Hawthorne | 10:31:48 | -37.8 | Dark | Up | 15.9 | 112.6 | Really Low | 10:16:48 - 10:46:48 | 5539 |
| CPSLO | 10:31:18 | -41.2 | Dark | Up | 15.5 | 110.3 | Really Low | 10:16:18 - 10:46:18 | 5522 |
| Bishop | 10:31:41 | -38.4 | Dark | Up | 16.5 | 112.4 | Really Low | 10:16:41 - 10:46:41 | 5515 |
| Tonopah | 10:31:46 | -37.3 | Dark | Up | 17.1 | 113.5 | Really Low | 10:16:46 - 10:46:46 | 5501 |
| Lone Pine | 10:31:34 | -38.7 | Dark | Up | 17.0 | 112.4 | Really Low | 10:16:34 - 10:46:34 | 5494 |
| Beatty | 10:31:42 | -37.7 | Dark | Up | 17.9 | 113.4 | Really Low | 10:16:42 - 10:46:42 | 5470 |
| Wildwood | 10:31:16 | -40.6 | Dark | Up | 17.5 | 111.3 | Really Low | 10:16:16 - 10:46:16 | 5453 |
| Indian Springs | 10:31:43 | -37.2 | Dark | Up | 18.8 | 114.1 | Really Low | 10:16:43 - 10:46:43 | 5439 |
| Henderson | 10:31:39 | -37.0 | Dark | Up | 19.6 | 114.4 | Really Low | 10:16:39 - 10:46:39 | 5411 |
| Idyllwild | 10:31:18 | -39.6 | Dark | Up | 19.1 | 112.4 | Really Low | 10:16:18 - 10:46:18 | 5402 |
| Searchlight/Boulder City | 10:31:32 | -37.3 | Dark | Up | 19.8 | 114.2 | Really Low | 10:16:32 - 10:46:32 | 5397 |
| Laughlin/Bullhead City | 10:31:32 | -37.3 | Dark | Up | 20.2 | 114.4 | Low | 10:16:32 - 10:46:32 | 5381 |
| Mohave Valley | 10:31:34 | -37.4 | Dark | Up | 20.3 | 114.3 | Low | 10:16:34 - 10:46:34 | 5375 |
| Patrick | 10:31:39 | -36.6 | Dark | Up | 20.6 | 115.0 | Low | 10:16:39 - 10:46:39 | 5368 |
| Kingman/Dolan Springs | 10:31:37 | -36.9 | Dark | Up | 20.6 | 114.8 | Low | 10:16:37 - 10:46:37 | 5368 |
| Lake Havasu City | 10:31:30 | -37.5 | Dark | Up | 20.7 | 114.3 | Low | 10:16:30 - 10:46:30 | 5359 |
| Calipatria | 10:31:16 | -39.1 | Dark | Up | 20.2 | 113.0 | Low | 10:16:16 - 10:46:16 | 5357 |
| Parker | 10:31:26 | -37.6 | Dark | Up | 20.8 | 114.2 | Low | 10:16:26 - 10:46:26 | 5350 |
| Blythe | 10:31:24 | -38.1 | Dark | Up | 20.8 | 113.8 | Low | 10:16:24 - 10:46:24 | 5345 |
| DCO | 10:31:36 | -36.3 | Dark | Up | 21.3 | 115.4 | Low | 10:16:36 - 10:46:36 | 5343 |
| Yuma | 10:31:17 | -38.7 | Dark | Up | 21.1 | 113.5 | Low | 10:16:17 - 10:46:17 | 5322 |
| Niwot | 10:32:41 | -28.2 | Dark | Up | 24.5 | 123.6 | Low | 10:17:41 - 10:47:41 | 5198 |
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 307261, (2019/03/22 10:32UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 38.66 50 Nunki 18:55:15.9 -26:17:49 2.0 19.57 82 PPM 202138 18:47:28.9 -05:42:19 4.6 1.18 81 PPM 202153 18:48:35.7 -07:07:57 8.4 0.41 81 PPM 202177 18:49:43.3 -06:49:18 9.7 0.08 81 307261 18:49:26.3 -06:46:38 13.5 81 Positions are for J2000
Event circumstances last updated at 2018/10/04 19:03:38 UT
Marc W. Buie, Southwest Research Institute