Event between (342842) 08YB3 and star GA1380:06612972 with event index number of 1058181
Geocentric closest approach at 2021/02/25 11:26:45 UTC
J2000 position of star is 20:26:05.9 +48:26:22
Equinox of date position of star is 20:26:45.2 +48:30:34
Stellar brightness G=15.5,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 110 degrees from the moon.
Moon is 96% illuminated.
TNO apparent brightness V=21.1
[RECON map]
TNO is 13.7 AU from the Sun
and 14.1 AU from the Earth.
The TNO is moving 25.7
km/sec on the sky relative to the star, or,
9.1 arcsec/hr.
The 1-sigma error in the time of the event is 27 seconds.
The 1-sigma cross-track error in the shadow position is
1073 km.
The sky-plane scale is
10220.9 km/arcsec.
The TNO has an absolute magnitude Hv=9.3
Diameter=83.2 km assuming a 5% albedo -- 3.2 sec chord
Diameter=34.0 km assuming a 30% albedo -- 1.3 sec chord
Dynamical classification is CENTAURR
Star training set for 342842, (2021/02/25 11:27UT) Object RA Dec mag sep mel Deneb 20:42:09.2 +45:21:24 1.3 4.10 114 45Ome1Cyg 20:30:42.9 +49:01:25 4.9 0.83 110 PPM 059965 20:28:46.9 +48:19:11 8.3 0.39 110 PPM 059948 20:28:09.4 +48:20:38 9.2 0.29 110 342842 20:26:45.3 +48:30:35 15.5 110 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 4.6 km
RECON observability=1.0 and success probability=0.5%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Victoria | 11:25:23 | -35.5 | Dark | Up | 27.5 | 46.8 | Low | 11:22:36 - 11:28:09 | 4873 |
| Chiloquin | 11:25:00 | -37.5 | Dark | Up | 24.1 | 45.4 | Low | 11:22:14 - 11:27:47 | 4790 |
| Sisters | 11:25:06 | -36.5 | Dark | Up | 25.4 | 46.1 | Low | 11:22:19 - 11:27:52 | 4788 |
| Klamath Falls | 11:25:00 | -37.6 | Dark | Up | 23.9 | 45.3 | Low | 11:22:13 - 11:27:46 | 4783 |
| La Pine/Gilchrist | 11:25:03 | -36.8 | Dark | Up | 25.1 | 45.9 | Low | 11:22:17 - 11:27:50 | 4781 |
| Oregon Observatory | 11:25:04 | -36.6 | Dark | Up | 25.2 | 46.0 | Low | 11:22:18 - 11:27:51 | 4779 |
| The Dalles | 11:25:10 | -35.7 | Dark | Up | 26.6 | 46.7 | Low | 11:22:23 - 11:27:56 | 4775 |
| Bend | 11:25:05 | -36.5 | Dark | Up | 25.4 | 46.1 | Low | 11:22:18 - 11:27:51 | 4774 |
| Redmond | 11:25:05 | -36.3 | Dark | Up | 25.6 | 46.3 | Low | 11:22:19 - 11:27:52 | 4769 |
| Maupin | 11:25:08 | -35.8 | Dark | Up | 26.3 | 46.6 | Low | 11:22:22 - 11:27:55 | 4768 |
| Goldendale | 11:25:10 | -35.4 | Dark | Up | 26.9 | 47.0 | Low | 11:22:24 - 11:27:57 | 4759 |
| Fall River/Burney | 11:24:55 | -37.9 | Dark | Up | 23.2 | 45.1 | Low | 11:22:09 - 11:27:42 | 4754 |
| Ellensburg | 11:25:13 | -34.6 | Dark | Up | 27.8 | 47.6 | Low | 11:22:27 - 11:28:00 | 4750 |
| Yakima | 11:25:12 | -34.8 | Dark | Up | 27.5 | 47.4 | Low | 11:22:25 - 11:27:58 | 4750 |
| North Lake | 11:25:01 | -36.6 | Dark | Up | 25.1 | 46.0 | Low | 11:22:15 - 11:27:48 | 4749 |
| Toppenish/White Swan | 11:25:12 | -34.8 | Dark | Up | 27.5 | 47.4 | Low | 11:22:25 - 11:27:58 | 4741 |
| Wenatchee | 11:25:15 | -34.3 | Dark | Up | 28.2 | 47.9 | Low | 11:22:28 - 11:28:01 | 4740 |
| Manson/Chelan | 11:25:16 | -34.0 | Dark | Up | 28.6 | 48.1 | Low | 11:22:30 - 11:28:03 | 4733 |
| Paisley | 11:24:59 | -36.6 | Dark | Up | 24.9 | 46.0 | Low | 11:22:12 - 11:27:45 | 4728 |
| Greenville | 11:24:51 | -37.9 | Dark | Up | 22.8 | 45.0 | Low | 11:22:05 - 11:27:38 | 4721 |
| Quincy | 11:24:50 | -38.0 | Dark | Up | 22.7 | 45.0 | Low | 11:22:04 - 11:27:37 | 4719 |
| Gimple | 11:24:51 | -37.9 | Dark | Up | 22.9 | 45.0 | Low | 11:22:05 - 11:27:38 | 4717 |
| Brewster | 11:25:16 | -33.7 | Dark | Up | 29.0 | 48.4 | Low | 11:22:30 - 11:28:03 | 4717 |
| Peachland | 11:25:22 | -32.9 | Dark | Up | 30.1 | 49.1 | Up | 11:22:36 - 11:28:09 | 4715 |
| Lakeview | 11:24:57 | -36.7 | Dark | Up | 24.6 | 45.9 | Low | 11:22:10 - 11:27:43 | 4714 |
| Summerland | 11:25:21 | -32.9 | Dark | Up | 30.0 | 49.1 | Up | 11:22:35 - 11:28:08 | 4712 |
| Susanville | 11:24:52 | -37.6 | Dark | Up | 23.2 | 45.2 | Low | 11:22:05 - 11:27:38 | 4710 |
| Okanogan | 11:25:17 | -33.4 | Dark | Up | 29.2 | 48.6 | Low | 11:22:30 - 11:28:03 | 4708 |
| Oliver | 11:25:19 | -33.0 | Dark | Up | 29.8 | 49.0 | Low | 11:22:33 - 11:28:06 | 4707 |
| Penticton | 11:25:21 | -32.8 | Dark | Up | 30.0 | 49.2 | Up | 11:22:35 - 11:28:08 | 4707 |
| Kelowna | 11:25:22 | -32.6 | Dark | Up | 30.3 | 49.3 | Up | 11:22:35 - 11:28:08 | 4702 |
| Tonasket | 11:25:18 | -33.2 | Dark | Up | 29.5 | 48.8 | Low | 11:22:32 - 11:28:05 | 4702 |
| Anarchist Mountain Observatory | 11:25:19 | -33.0 | Dark | Up | 29.8 | 49.0 | Low | 11:22:32 - 11:28:05 | 4699 |
| Cedarville | 11:24:55 | -36.8 | Dark | Up | 24.2 | 45.8 | Low | 11:22:08 - 11:27:41 | 4699 |
| Clarence Fulton | 11:25:23 | -32.4 | Dark | Up | 30.6 | 49.6 | Up | 11:22:37 - 11:28:10 | 4695 |
| Portola | 11:24:49 | -37.7 | Dark | Up | 22.9 | 45.1 | Low | 11:22:03 - 11:27:36 | 4693 |
| Pasco | 11:25:09 | -34.1 | Dark | Up | 28.1 | 48.0 | Low | 11:22:22 - 11:27:55 | 4682 |
| PNWRO | 11:25:08 | -34.1 | Dark | Up | 28.0 | 48.0 | Low | 11:22:21 - 11:27:54 | 4670 |
| Reno | 11:24:48 | -37.4 | Dark | Up | 23.0 | 45.3 | Low | 11:22:01 - 11:27:34 | 4656 |
| Carson City | 11:24:47 | -37.5 | Dark | Up | 22.8 | 45.2 | Low | 11:22:00 - 11:27:33 | 4650 |
| Gardnerville | 11:24:46 | -37.6 | Dark | Up | 22.6 | 45.1 | Low | 11:21:59 - 11:27:32 | 4644 |
| CPSLO | 11:24:36 | -39.6 | Dark | Up | 19.5 | 43.8 | Really Low | 11:21:49 - 11:27:22 | 4629 |
| Yerington | 11:24:45 | -37.1 | Dark | Up | 23.0 | 45.4 | Low | 11:21:59 - 11:27:32 | 4614 |
| Lee Vining | 11:24:42 | -37.5 | Dark | Up | 22.3 | 45.1 | Low | 11:21:55 - 11:27:28 | 4596 |
| Hawthorne | 11:24:43 | -36.9 | Dark | Up | 23.0 | 45.5 | Low | 11:21:56 - 11:27:29 | 4579 |
| Bishop | 11:24:39 | -37.1 | Dark | Up | 22.3 | 45.2 | Low | 11:21:52 - 11:27:25 | 4546 |
| Tonopah | 11:24:39 | -36.0 | Dark | Up | 23.4 | 45.8 | Low | 11:21:52 - 11:27:25 | 4495 |
| Wildwood | 11:24:29 | -38.4 | Dark | Up | 19.8 | 44.2 | Really Low | 11:21:42 - 11:27:15 | 4490 |
| Beatty | 11:24:35 | -36.1 | Dark | Up | 22.9 | 45.7 | Low | 11:21:48 - 11:27:21 | 4448 |
| Indian Springs | 11:24:32 | -35.3 | Dark | Up | 23.2 | 45.9 | Low | 11:21:45 - 11:27:18 | 4380 |
| Idyllwild | 11:24:25 | -37.0 | Dark | Up | 20.6 | 44.8 | Low | 11:21:38 - 11:27:11 | 4375 |
| Henderson | 11:24:30 | -35.0 | Dark | Up | 23.3 | 46.0 | Low | 11:21:43 - 11:27:16 | 4328 |
| Calipatria | 11:24:21 | -36.2 | Dark | Up | 20.9 | 45.0 | Low | 11:21:35 - 11:27:08 | 4289 |
| Laughlin/Bullhead City | 11:24:26 | -34.9 | Dark | Up | 22.9 | 45.9 | Low | 11:21:40 - 11:27:13 | 4284 |
| Mohave Valley | 11:24:25 | -35.0 | Dark | Up | 22.7 | 45.8 | Low | 11:21:39 - 11:27:12 | 4277 |
| Kingman/Dolan Springs | 11:24:25 | -34.5 | Dark | Up | 23.2 | 46.1 | Low | 11:21:39 - 11:27:12 | 4255 |
| Lake Havasu City | 11:24:24 | -34.9 | Dark | Up | 22.6 | 45.8 | Low | 11:21:38 - 11:27:11 | 4253 |
| Patrick | 11:24:26 | -34.3 | Dark | Up | 23.5 | 46.2 | Low | 11:21:40 - 11:27:13 | 4249 |
| Blythe | 11:24:22 | -35.3 | Dark | Up | 21.8 | 45.4 | Low | 11:21:35 - 11:27:08 | 4246 |
| Parker | 11:24:23 | -34.9 | Dark | Up | 22.3 | 45.7 | Low | 11:21:36 - 11:27:09 | 4242 |
| Yuma | 11:24:19 | -35.6 | Dark | Up | 21.1 | 45.1 | Low | 11:21:32 - 11:27:05 | 4224 |
| George/Scottsdale | 11:24:19 | -33.1 | Dark | Up | 23.5 | 46.3 | Low | 11:21:32 - 11:27:05 | 4083 |
| Dunrhomin | 11:24:33 | -26.5 | Dark | Up | 31.8 | 51.1 | Up | 11:21:47 - 11:27:20 | 3845 |
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, (2021/02/25 11:27UT) Object RA Dec mag sep mel Deneb 20:41:25.9 +45:16:49 1.3 4.10 114 45Ome1Cyg 20:30:03.6 +48:57:06 4.9 0.83 110 PPM 059965 20:28:07.1 +48:14:55 8.3 0.39 110 PPM 059948 20:27:29.7 +48:16:23 9.2 0.29 110 342842 20:26:05.9 +48:26:22 15.5 110 Positions are for J2000
Event circumstances last updated at 2021/02/06 20:38:25 UT
Marc W. Buie, Southwest Research Institute