Event between (87555) 00QB243 and star GA0980:00056916 with event index number of 1117747
Geocentric closest approach at 2021/11/06 05:05:04 UTC
J2000 position of star is 00:37:49.8 +09:15:28
Equinox of date position of star is 00:38:57.6 +09:22:39
Stellar brightness G=12.8,
use SENSEUP=32 with the MallinCam and and exposure
time of 500 milli-seconds with the QHY174 camera.
Star is 130 degrees from the moon.
Moon is 3% illuminated.
TNO apparent brightness V=23.4
[RECON map]
TNO is 32.7 AU from the Sun
and 31.9 AU from the Earth.
The TNO is moving 21.0
km/sec on the sky relative to the star, or,
3.3 arcsec/hr.
The 1-sigma error in the time of the event is 117 seconds.
The 1-sigma cross-track error in the shadow position is
2098 km.
The sky-plane scale is
23124.9 km/arcsec.
The TNO has an absolute magnitude Hv=8.2
Diameter=138.0 km assuming a 5% albedo -- 6.6 sec chord
Diameter=56.4 km assuming a 30% albedo -- 2.7 sec chord
Dynamical classification is CENTAURR
Star training set for 87555, (2021/11/06 05:05UT) Object RA Dec mag sep mel Algenib 00:14:21.8 +15:18:18 2.8 8.44 126 PPM 116483 00:29:28.0 +10:18:34 6.0 2.52 128 PPM 143767 00:42:19.8 +09:28:27 6.7 0.84 130 PPM 143687 00:38:30.9 +09:07:16 9.2 0.28 129 87555 00:38:57.8 +09:22:40 12.8 130 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 20.5 km
RECON observability=1.0 and success probability=0.3%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Victoria | 05:04:20 | -42.1 | Dark | Down | 49.6 | 162.9 | Up | 04:54:07 - 05:14:33 | 9554 |
| Clarence Fulton | 05:04:03 | -43.5 | Dark | Down | 48.6 | 169.4 | Up | 04:53:50 - 05:14:16 | 9543 |
| Peachland | 05:04:06 | -43.6 | Dark | Down | 49.0 | 168.6 | Up | 04:53:53 - 05:14:19 | 9522 |
| Kelowna | 05:04:04 | -43.7 | Dark | Down | 49.0 | 169.0 | Up | 04:53:51 - 05:14:17 | 9520 |
| Summerland | 05:04:06 | -43.7 | Dark | Down | 49.2 | 168.7 | Up | 04:53:53 - 05:14:19 | 9508 |
| Penticton | 05:04:06 | -43.8 | Dark | Down | 49.3 | 168.8 | Up | 04:53:53 - 05:14:19 | 9500 |
| Oliver | 05:04:07 | -44.0 | Dark | Down | 49.6 | 168.8 | Up | 04:53:54 - 05:14:20 | 9474 |
| Anarchist Mountain Observatory | 05:04:06 | -44.2 | Dark | Down | 49.8 | 169.0 | Up | 04:53:53 - 05:14:19 | 9456 |
| Tonasket | 05:04:07 | -44.3 | Dark | Down | 50.1 | 168.9 | Up | 04:53:54 - 05:14:20 | 9436 |
| Okanogan | 05:04:08 | -44.4 | Dark | Down | 50.4 | 168.5 | Up | 04:53:55 - 05:14:21 | 9416 |
| Brewster | 05:04:10 | -44.4 | Dark | Down | 50.6 | 168.2 | Up | 04:53:57 - 05:14:23 | 9403 |
| Manson/Chelan | 05:04:11 | -44.3 | Dark | Down | 50.8 | 167.6 | Up | 04:53:58 - 05:14:24 | 9400 |
| Wenatchee | 05:04:13 | -44.5 | Dark | Down | 51.2 | 167.2 | Up | 04:54:00 - 05:14:26 | 9370 |
| Ellensburg | 05:04:15 | -44.5 | Dark | Down | 51.6 | 166.7 | Up | 04:54:02 - 05:14:28 | 9347 |
| Yakima | 05:04:16 | -44.7 | Dark | Down | 52.0 | 166.6 | Up | 04:54:03 - 05:14:29 | 9318 |
| Toppenish/White Swan | 05:04:16 | -44.9 | Dark | Down | 52.2 | 166.8 | Up | 04:54:03 - 05:14:29 | 9295 |
| Goldendale | 05:04:19 | -44.9 | Dark | Down | 52.7 | 166.0 | Up | 04:54:06 - 05:14:32 | 9269 |
| The Dalles | 05:04:21 | -44.8 | Dark | Down | 52.9 | 165.3 | Up | 04:54:08 - 05:14:34 | 9264 |
| Pasco | 05:04:12 | -45.7 | Dark | Down | 52.5 | 168.8 | Up | 04:53:59 - 05:14:25 | 9243 |
| Maupin | 05:04:21 | -45.1 | Dark | Down | 53.3 | 165.4 | Up | 04:54:08 - 05:14:34 | 9229 |
| PNWRO | 05:04:12 | -46.0 | Dark | Down | 52.8 | 169.1 | Up | 04:53:59 - 05:14:25 | 9216 |
| Sisters | 05:04:25 | -45.2 | Dark | Down | 54.0 | 164.3 | Up | 04:54:12 - 05:14:38 | 9180 |
| Redmond | 05:04:23 | -45.4 | Dark | Down | 54.1 | 164.9 | Up | 04:54:10 - 05:14:36 | 9163 |
| Bend | 05:04:24 | -45.4 | Dark | Down | 54.3 | 164.6 | Up | 04:54:11 - 05:14:37 | 9152 |
| Oregon Observatory | 05:04:24 | -45.4 | Dark | Down | 54.5 | 164.3 | Up | 04:54:11 - 05:14:37 | 9144 |
| La Pine/Gilchrist | 05:04:26 | -45.5 | Dark | Down | 54.7 | 164.1 | Up | 04:54:13 - 05:14:39 | 9130 |
| North Lake | 05:04:25 | -46.1 | Dark | Down | 55.2 | 165.0 | Up | 04:54:12 - 05:14:38 | 9074 |
| Chiloquin | 05:04:30 | -45.7 | Dark | Down | 55.7 | 163.1 | Up | 04:54:17 - 05:14:43 | 9056 |
| Klamath Falls | 05:04:30 | -45.9 | Dark | Down | 56.0 | 163.1 | Up | 04:54:17 - 05:14:43 | 9026 |
| Paisley | 05:04:25 | -46.5 | Dark | Down | 55.8 | 165.4 | Up | 04:54:12 - 05:14:38 | 9018 |
| Lakeview | 05:04:26 | -46.9 | Dark | Down | 56.3 | 165.6 | Up | 04:54:13 - 05:14:39 | 8971 |
| Fall River/Burney | 05:04:32 | -46.6 | Dark | Down | 57.2 | 163.3 | Up | 04:54:19 - 05:14:45 | 8918 |
| Cedarville | 05:04:26 | -47.3 | Dark | Down | 57.0 | 165.6 | Up | 04:54:13 - 05:14:39 | 8911 |
| Susanville | 05:04:31 | -47.4 | Dark | Down | 58.0 | 164.3 | Up | 04:54:18 - 05:14:44 | 8839 |
| Greenville | 05:04:33 | -47.3 | Dark | Down | 58.2 | 163.7 | Up | 04:54:20 - 05:14:46 | 8828 |
| Gimple | 05:04:32 | -47.4 | Dark | Down | 58.2 | 163.8 | Up | 04:54:19 - 05:14:45 | 8825 |
| Quincy | 05:04:33 | -47.4 | Dark | Down | 58.4 | 163.6 | Up | 04:54:20 - 05:14:46 | 8811 |
| Portola | 05:04:31 | -47.8 | Dark | Down | 58.6 | 164.4 | Up | 04:54:18 - 05:14:44 | 8783 |
| Reno | 05:04:30 | -48.3 | Dark | Down | 59.0 | 165.5 | Up | 04:54:17 - 05:14:43 | 8736 |
| Carson City | 05:04:31 | -48.5 | Dark | Down | 59.3 | 165.4 | Up | 04:54:18 - 05:14:44 | 8706 |
| Gardnerville | 05:04:31 | -48.6 | Dark | Down | 59.6 | 165.4 | Up | 04:54:18 - 05:14:44 | 8684 |
| Yerington | 05:04:29 | -49.0 | Dark | Down | 59.6 | 166.5 | Up | 04:54:16 - 05:14:42 | 8665 |
| Hawthorne | 05:04:28 | -49.6 | Dark | Down | 60.2 | 167.4 | Up | 04:54:15 - 05:14:41 | 8606 |
| Lee Vining | 05:04:31 | -49.4 | Dark | Down | 60.6 | 166.2 | Up | 04:54:18 - 05:14:44 | 8578 |
| Tonopah | 05:04:24 | -50.8 | Dark | Down | 60.9 | 170.0 | Up | 04:54:11 - 05:14:37 | 8512 |
| Bishop | 05:04:30 | -50.2 | Dark | Down | 61.4 | 167.4 | Up | 04:54:17 - 05:14:43 | 8498 |
| CPSLO | 05:04:43 | -49.2 | Dark | Down | 62.9 | 161.8 | Up | 04:54:30 - 05:14:56 | 8411 |
| Beatty | 05:04:25 | -51.6 | Dark | Down | 62.1 | 170.6 | Up | 04:54:12 - 05:14:38 | 8394 |
| Indian Springs | 05:04:21 | -52.5 | Dark | Down | 62.5 | 172.7 | Up | 04:54:08 - 05:14:34 | 8323 |
| Dunrhomin | 05:03:35 | -57.4 | Dark | Down | 58.4 | 193.1 | Up | 04:53:22 - 05:13:48 | 8260 |
| Henderson | 05:04:20 | -53.2 | Dark | Down | 63.1 | 174.1 | Up | 04:54:07 - 05:14:33 | 8249 |
| Wildwood | 05:04:38 | -51.2 | Dark | Down | 64.5 | 165.5 | Up | 04:54:25 - 05:14:51 | 8222 |
| Laughlin/Bullhead City | 05:04:20 | -53.9 | Dark | Down | 64.0 | 174.8 | Up | 04:54:07 - 05:14:33 | 8156 |
| Patrick | 05:04:17 | -54.3 | Dark | Down | 63.8 | 176.4 | Up | 04:54:04 - 05:14:30 | 8150 |
| Kingman/Dolan Springs | 05:04:18 | -54.2 | Dark | Down | 64.0 | 176.0 | Up | 04:54:05 - 05:14:31 | 8137 |
| Mohave Valley | 05:04:20 | -54.0 | Dark | Down | 64.3 | 174.8 | Up | 04:54:07 - 05:14:33 | 8131 |
| Idyllwild | 05:04:32 | -52.8 | Dark | Down | 65.2 | 169.6 | Up | 04:54:19 - 05:14:45 | 8114 |
| Lake Havasu City | 05:04:20 | -54.3 | Dark | Down | 64.7 | 175.3 | Up | 04:54:07 - 05:14:33 | 8085 |
| Parker | 05:04:21 | -54.5 | Dark | Down | 65.0 | 175.3 | Up | 04:54:08 - 05:14:34 | 8053 |
| Blythe | 05:04:24 | -54.4 | Dark | Down | 65.5 | 174.5 | Up | 04:54:11 - 05:14:37 | 8017 |
| Calipatria | 05:04:28 | -53.9 | Dark | Down | 65.9 | 172.2 | Up | 04:54:15 - 05:14:41 | 8011 |
| Yuma | 05:04:26 | -54.7 | Dark | Down | 66.5 | 174.2 | Up | 04:54:13 - 05:14:39 | 7935 |
| George/Scottsdale | 05:04:13 | -56.5 | Dark | Down | 65.5 | 180.9 | Up | 04:54:00 - 05:14:26 | 7917 |
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 87555, (2021/11/06 05:05UT) Object RA Dec mag sep mel Algenib 00:13:14.2 +15:11:01 2.8 8.44 126 PPM 116483 00:28:20.1 +10:11:19 6.0 2.52 128 PPM 143767 00:41:11.7 +09:21:16 6.7 0.84 130 PPM 143687 00:37:22.9 +09:00:05 9.2 0.28 129 87555 00:37:49.8 +09:15:28 12.8 130 Positions are for J2000
Event circumstances last updated at 2021/10/12 02:01:05 UT
Marc W. Buie, Southwest Research Institute