Event between (342842) 08YB3 and star GA1380:06721961 with event index number of 1061369
Geocentric closest approach at 2021/03/08 10:11:00 UTC
J2000 position of star is 20:29:29.9 +48:45:35
Equinox of date position of star is 20:30:09.2 +48:49:52
Stellar brightness G=16.0,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 75 degrees from the moon.
Moon is 25% 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 24.7
km/sec on the sky relative to the star, or,
8.7 arcsec/hr.
The 1-sigma error in the time of the event is 34 seconds.
The 1-sigma cross-track error in the shadow position is
965 km.
The sky-plane scale is
10228.8 km/arcsec.
The TNO has an absolute magnitude Hv=9.3
Diameter=83.2 km assuming a 5% albedo -- 3.4 sec chord
Diameter=34.0 km assuming a 30% albedo -- 1.4 sec chord
Dynamical classification is CENTAURR
Star training set for 342842, (2021/03/08 10:11UT) Object RA Dec mag sep mel Deneb 20:42:09.3 +45:21:25 1.3 4.03 73 45Ome1Cyg 20:30:42.9 +49:01:25 4.9 0.21 76 PPM 060034 20:30:44.7 +48:42:49 7.5 0.15 75 PPM 060030 20:30:40.7 +48:51:05 8.9 0.09 75 342842 20:30:09.3 +48:49:53 16.0 75 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 4.9 km
RECON observability=0.5 and success probability=1.9%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| CPSLO | 10:09:45 | -49.3 | Dark | Down | 14.9 | 40.1 | Really Low | 10:06:25 - 10:13:06 | 3256 |
| Fall River/Burney | 10:10:05 | -45.6 | Dark | Down | 18.9 | 40.9 | Really Low | 10:06:44 - 10:13:25 | 3252 |
| Klamath Falls | 10:10:09 | -44.9 | Dark | Down | 19.6 | 41.0 | Really Low | 10:06:49 - 10:13:30 | 3250 |
| Chiloquin | 10:10:10 | -44.7 | Dark | Down | 19.9 | 41.1 | Really Low | 10:06:50 - 10:13:31 | 3248 |
| Quincy | 10:10:00 | -46.2 | Dark | Down | 18.3 | 40.9 | Really Low | 10:06:39 - 10:13:20 | 3248 |
| Greenville | 10:10:01 | -46.1 | Dark | Down | 18.5 | 40.9 | Really Low | 10:06:40 - 10:13:21 | 3246 |
| Gimple | 10:10:01 | -46.0 | Dark | Down | 18.5 | 41.0 | Really Low | 10:06:40 - 10:13:21 | 3243 |
| Susanville | 10:10:01 | -45.7 | Dark | Down | 18.8 | 41.1 | Really Low | 10:06:40 - 10:13:21 | 3234 |
| Portola | 10:09:58 | -46.1 | Dark | Down | 18.5 | 41.1 | Really Low | 10:06:38 - 10:13:19 | 3233 |
| La Pine/Gilchrist | 10:10:13 | -43.7 | Dark | Down | 20.9 | 41.5 | Low | 10:06:52 - 10:13:33 | 3222 |
| Oregon Observatory | 10:10:14 | -43.5 | Dark | Down | 21.1 | 41.6 | Low | 10:06:53 - 10:13:34 | 3217 |
| Carson City | 10:09:55 | -46.1 | Dark | Down | 18.3 | 41.2 | Really Low | 10:06:34 - 10:13:15 | 3215 |
| Gardnerville | 10:09:54 | -46.3 | Dark | Down | 18.2 | 41.2 | Really Low | 10:06:34 - 10:13:15 | 3215 |
| Sisters | 10:10:15 | -43.3 | Dark | Down | 21.3 | 41.7 | Low | 10:06:54 - 10:13:35 | 3214 |
| Reno | 10:09:56 | -45.9 | Dark | Down | 18.6 | 41.3 | Really Low | 10:06:35 - 10:13:16 | 3213 |
| Bend | 10:10:14 | -43.3 | Dark | Down | 21.3 | 41.7 | Low | 10:06:53 - 10:13:34 | 3210 |
| North Lake | 10:10:10 | -43.8 | Dark | Down | 20.8 | 41.7 | Low | 10:06:49 - 10:13:30 | 3210 |
| Cedarville | 10:10:03 | -44.7 | Dark | Down | 19.9 | 41.6 | Really Low | 10:06:43 - 10:13:24 | 3208 |
| Lakeview | 10:10:06 | -44.3 | Dark | Down | 20.3 | 41.7 | Low | 10:06:45 - 10:13:26 | 3206 |
| Paisley | 10:10:08 | -44.0 | Dark | Down | 20.6 | 41.7 | Low | 10:06:47 - 10:13:28 | 3206 |
| Redmond | 10:10:14 | -43.1 | Dark | Down | 21.5 | 41.8 | Low | 10:06:53 - 10:13:34 | 3202 |
| Lee Vining | 10:09:49 | -46.6 | Dark | Down | 17.7 | 41.2 | Really Low | 10:06:29 - 10:13:10 | 3198 |
| Yerington | 10:09:53 | -45.9 | Dark | Down | 18.5 | 41.5 | Really Low | 10:06:33 - 10:13:14 | 3194 |
| Maupin | 10:10:17 | -42.4 | Dark | Down | 22.2 | 42.1 | Low | 10:06:56 - 10:13:37 | 3184 |
| The Dalles | 10:10:18 | -42.1 | Dark | Down | 22.5 | 42.2 | Low | 10:06:58 - 10:13:39 | 3179 |
| Wildwood | 10:09:37 | -48.8 | Dark | Down | 15.1 | 40.7 | Really Low | 10:06:16 - 10:12:57 | 3179 |
| Victoria | 10:10:31 | -40.7 | Dark | Down | 23.6 | 41.9 | Low | 10:07:11 - 10:13:52 | 3179 |
| Hawthorne | 10:09:50 | -45.9 | Dark | Down | 18.4 | 41.6 | Really Low | 10:06:30 - 10:13:11 | 3178 |
| Bishop | 10:09:46 | -46.6 | Dark | Down | 17.7 | 41.4 | Really Low | 10:06:25 - 10:13:06 | 3173 |
| Goldendale | 10:10:18 | -41.8 | Dark | Down | 22.8 | 42.5 | Low | 10:06:58 - 10:13:39 | 3165 |
| Yakima | 10:10:20 | -41.1 | Dark | Down | 23.5 | 42.8 | Low | 10:06:59 - 10:13:40 | 3142 |
| Toppenish/White Swan | 10:10:19 | -41.1 | Dark | Down | 23.4 | 42.8 | Low | 10:06:58 - 10:13:39 | 3141 |
| Ellensburg | 10:10:21 | -40.7 | Dark | Down | 23.8 | 42.9 | Low | 10:07:01 - 10:13:42 | 3134 |
| Tonopah | 10:09:46 | -45.4 | Dark | Down | 18.8 | 42.1 | Really Low | 10:06:25 - 10:13:06 | 3128 |
| Wenatchee | 10:10:22 | -40.3 | Dark | Down | 24.2 | 43.2 | Low | 10:07:01 - 10:13:42 | 3118 |
| Beatty | 10:09:40 | -45.9 | Dark | Down | 18.2 | 42.0 | Really Low | 10:06:20 - 10:13:01 | 3112 |
| Idyllwild | 10:09:31 | -47.8 | Dark | Down | 15.8 | 41.3 | Really Low | 10:06:11 - 10:12:52 | 3105 |
| Pasco | 10:10:16 | -40.7 | Dark | Down | 23.9 | 43.4 | Low | 10:06:55 - 10:13:36 | 3104 |
| Manson/Chelan | 10:10:23 | -39.9 | Dark | Down | 24.6 | 43.4 | Low | 10:07:03 - 10:13:44 | 3103 |
| PNWRO | 10:10:15 | -40.7 | Dark | Down | 23.8 | 43.5 | Low | 10:06:54 - 10:13:35 | 3102 |
| Brewster | 10:10:23 | -39.6 | Dark | Down | 25.0 | 43.7 | Low | 10:07:03 - 10:13:44 | 3088 |
| Okanogan | 10:10:24 | -39.3 | Dark | Down | 25.2 | 43.9 | Low | 10:07:03 - 10:13:44 | 3076 |
| Indian Springs | 10:09:37 | -45.4 | Dark | Down | 18.5 | 42.3 | Really Low | 10:06:17 - 10:12:58 | 3070 |
| Tonasket | 10:10:24 | -38.9 | Dark | Down | 25.6 | 44.1 | Low | 10:07:04 - 10:13:45 | 3064 |
| Oliver | 10:10:26 | -38.6 | Dark | Down | 25.8 | 44.2 | Low | 10:07:06 - 10:13:47 | 3056 |
| Anarchist Mountain Observatory | 10:10:25 | -38.7 | Dark | Down | 25.8 | 44.2 | Low | 10:07:05 - 10:13:46 | 3055 |
| Calipatria | 10:09:27 | -47.4 | Dark | Down | 16.0 | 41.7 | Really Low | 10:06:06 - 10:12:47 | 3052 |
| Summerland | 10:10:28 | -38.4 | Dark | Down | 26.1 | 44.3 | Low | 10:07:07 - 10:13:48 | 3050 |
| Peachland | 10:10:29 | -38.3 | Dark | Down | 26.2 | 44.3 | Low | 10:07:08 - 10:13:49 | 3049 |
| Penticton | 10:10:28 | -38.4 | Dark | Down | 26.1 | 44.3 | Low | 10:07:07 - 10:13:48 | 3048 |
| Henderson | 10:09:34 | -45.3 | Dark | Down | 18.5 | 42.5 | Really Low | 10:06:14 - 10:12:55 | 3041 |
| Kelowna | 10:10:28 | -38.1 | Dark | Down | 26.4 | 44.5 | Low | 10:07:08 - 10:13:49 | 3037 |
| Clarence Fulton | 10:10:29 | -37.7 | Dark | Down | 26.7 | 44.7 | Low | 10:07:09 - 10:13:50 | 3023 |
| Laughlin/Bullhead City | 10:09:31 | -45.5 | Dark | Down | 18.0 | 42.4 | Really Low | 10:06:10 - 10:12:51 | 3022 |
| Mohave Valley | 10:09:30 | -45.7 | Dark | Down | 17.8 | 42.4 | Really Low | 10:06:09 - 10:12:50 | 3021 |
| Blythe | 10:09:26 | -46.4 | Dark | Down | 16.9 | 42.1 | Really Low | 10:06:05 - 10:12:46 | 3015 |
| Yuma | 10:09:23 | -47.0 | Dark | Down | 16.2 | 41.9 | Really Low | 10:06:03 - 10:12:44 | 3011 |
| Lake Havasu City | 10:09:28 | -45.8 | Dark | Down | 17.7 | 42.4 | Really Low | 10:06:07 - 10:12:48 | 3008 |
| Parker | 10:09:27 | -45.9 | Dark | Down | 17.4 | 42.3 | Really Low | 10:06:06 - 10:12:47 | 3005 |
| Kingman/Dolan Springs | 10:09:29 | -45.2 | Dark | Down | 18.3 | 42.6 | Really Low | 10:06:09 - 10:12:50 | 3001 |
| Patrick | 10:09:29 | -44.9 | Dark | Down | 18.6 | 42.8 | Really Low | 10:06:09 - 10:12:50 | 2993 |
| George/Scottsdale | 10:09:19 | -44.5 | Dark | Down | 18.5 | 43.1 | Really Low | 10:05:59 - 10:12:40 | 2896 |
| Dunrhomin | 10:09:29 | -36.5 | Dark | Down | 26.9 | 47.5 | Low | 10:06:09 - 10:12:50 | 2604 |
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, (2021/03/08 10:11UT) Object RA Dec mag sep mel Deneb 20:41:25.9 +45:16:49 1.3 4.03 73 45Ome1Cyg 20:30:03.6 +48:57:06 4.9 0.21 76 PPM 060034 20:30:05.0 +48:38:30 7.5 0.15 75 PPM 060030 20:30:01.2 +48:46:46 8.9 0.09 75 342842 20:29:29.9 +48:45:35 16.0 75 Positions are for J2000
Event circumstances last updated at 2021/02/06 20:43:51 UT
Marc W. Buie, Southwest Research Institute