Event between 13MR18 and star GA0980:04405539 with event index number of 2068660
Geocentric closest approach at 2021/09/06 04:56:45 UTC
J2000 position of star is 16:31:10.8 +08:57:25
Equinox of date position of star is 16:32:12.9 +08:54:43
Stellar brightness G=12.4,
use SENSEUP=16 with the MallinCam and and exposure
time of 250 milli-seconds with the QHY174 camera.
Star is 88 degrees from the moon.
Moon is 1% illuminated.
TNO apparent brightness V=22.5
[RECON map]
TNO is 27.3 AU from the Sun
and 27.5 AU from the Earth.
The TNO is moving 18.1
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 61 seconds.
The 1-sigma cross-track error in the shadow position is
1461 km.
The sky-plane scale is
19920.8 km/arcsec.
The TNO has an absolute magnitude Hv=7.9
Diameter=160.7 km assuming a 5% albedo -- 8.9 sec chord
Diameter=65.6 km assuming a 30% albedo -- 3.6 sec chord
Dynamical classification is 3:2E+6:4II
Star training set for 13MR18, (2021/09/06 04:57UT) Object RA Dec mag sep mel Arcturus 14:16:39.1 +19:04:14 0.0 34.34 54 Unukalhai 15:45:20.3 +06:21:32 2.6 11.89 78 29 Her 16:33:37.3 +11:26:34 6.5 2.55 88 PPM 162758 16:32:58.7 +09:22:10 7.3 0.49 88 PPM 162741 16:32:16.3 +08:46:32 9.9 0.14 88 13MR18 16:32:13.2 +08:54:42 12.4 89 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 2.8 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) |
| Dunrhomin | 04:55:43 | -35.4 | Dark | Down | 23.7 | 261.5 | Low | 04:50:10 - 05:01:15 | 9591 |
| George/Scottsdale | 04:56:17 | -36.5 | Dark | Down | 29.9 | 260.4 | Low | 04:50:44 - 05:01:49 | 9361 |
| Patrick | 04:56:07 | -34.2 | Dark | Down | 31.2 | 258.0 | Up | 04:50:35 - 05:01:40 | 9264 |
| Kingman/Dolan Springs | 04:56:06 | -34.2 | Dark | Down | 31.4 | 258.0 | Up | 04:50:34 - 05:01:39 | 9255 |
| Parker | 04:56:13 | -34.7 | Dark | Down | 31.8 | 258.5 | Up | 04:50:41 - 05:01:46 | 9243 |
| Lake Havasu City | 04:56:11 | -34.5 | Dark | Down | 31.8 | 258.3 | Up | 04:50:39 - 05:01:44 | 9242 |
| Mohave Valley | 04:56:08 | -34.1 | Dark | Down | 31.9 | 257.9 | Up | 04:50:35 - 05:01:40 | 9229 |
| Laughlin/Bullhead City | 04:56:09 | -33.9 | Dark | Down | 31.8 | 257.7 | Up | 04:50:36 - 05:01:41 | 9229 |
| Blythe | 04:56:15 | -34.9 | Dark | Down | 32.1 | 258.6 | Up | 04:50:42 - 05:01:47 | 9227 |
| Yuma | 04:56:21 | -35.4 | Dark | Down | 32.3 | 259.2 | Up | 04:50:49 - 05:01:54 | 9223 |
| Henderson | 04:56:01 | -33.0 | Dark | Down | 32.0 | 256.9 | Up | 04:50:28 - 05:01:33 | 9208 |
| Calipatria | 04:56:20 | -34.6 | Dark | Down | 33.0 | 258.4 | Up | 04:50:48 - 05:01:53 | 9179 |
| Indian Springs | 04:55:56 | -32.3 | Dark | Down | 32.4 | 256.0 | Up | 04:50:24 - 05:01:29 | 9173 |
| Idyllwild | 04:56:12 | -33.4 | Dark | Down | 33.8 | 257.1 | Up | 04:50:40 - 05:01:45 | 9120 |
| Beatty | 04:55:54 | -31.4 | Dark | Down | 33.2 | 255.0 | Up | 04:50:21 - 05:01:26 | 9117 |
| Tonopah | 04:55:45 | -30.3 | Dark | Down | 33.3 | 253.9 | Up | 04:50:12 - 05:01:17 | 9092 |
| Bishop | 04:55:49 | -30.0 | Dark | Down | 34.3 | 253.5 | Up | 04:50:17 - 05:01:22 | 9033 |
| Wildwood | 04:56:09 | -31.9 | Dark | Down | 35.3 | 255.6 | Up | 04:50:36 - 05:01:41 | 9019 |
| Hawthorne | 04:55:42 | -29.2 | Dark | Down | 34.2 | 252.5 | Up | 04:50:10 - 05:01:15 | 9018 |
| Lee Vining | 04:55:46 | -29.2 | Dark | Down | 34.7 | 252.5 | Up | 04:50:14 - 05:01:19 | 8994 |
| Yerington | 04:55:39 | -28.6 | Dark | Down | 34.5 | 251.8 | Up | 04:50:06 - 05:01:11 | 8988 |
| Gardnerville | 04:55:38 | -28.2 | Dark | Down | 34.9 | 251.4 | Up | 04:50:05 - 05:01:10 | 8958 |
| Carson City | 04:55:38 | -28.0 | Dark | Down | 34.9 | 251.2 | Up | 04:50:05 - 05:01:10 | 8955 |
| Reno | 04:55:36 | -27.8 | Dark | Down | 34.8 | 250.9 | Up | 04:50:04 - 05:01:09 | 8952 |
| PNWRO | 04:54:58 | -24.2 | Dark | Down | 31.9 | 247.6 | Up | 04:49:26 - 05:00:31 | 8935 |
| Cedarville | 04:55:22 | -26.4 | Dark | Down | 34.4 | 249.3 | Up | 04:49:50 - 05:00:55 | 8923 |
| Pasco | 04:54:57 | -24.0 | Dark | Down | 32.0 | 247.2 | Up | 04:49:24 - 05:00:29 | 8920 |
| Portola | 04:55:34 | -27.2 | Dark | Down | 35.2 | 250.2 | Up | 04:50:02 - 05:01:07 | 8917 |
| CPSLO | 04:55:59 | -29.8 | Dark | Down | 36.6 | 253.2 | Up | 04:50:27 - 05:01:32 | 8909 |
| Lakeview | 04:55:20 | -25.9 | Dark | Down | 34.3 | 248.7 | Up | 04:49:48 - 05:00:53 | 8909 |
| Susanville | 04:55:31 | -26.8 | Dark | Down | 35.1 | 249.6 | Up | 04:49:58 - 05:01:03 | 8904 |
| Paisley | 04:55:16 | -25.4 | Dark | Down | 34.2 | 248.2 | Up | 04:49:44 - 05:00:49 | 8895 |
| Gimple | 04:55:30 | -26.8 | Dark | Down | 35.3 | 249.6 | Up | 04:49:57 - 05:01:02 | 8894 |
| Quincy | 04:55:33 | -26.9 | Dark | Down | 35.5 | 249.7 | Up | 04:50:00 - 05:01:05 | 8891 |
| Greenville | 04:55:29 | -26.7 | Dark | Down | 35.4 | 249.5 | Up | 04:49:57 - 05:01:02 | 8890 |
| North Lake | 04:55:12 | -24.9 | Dark | Down | 34.3 | 247.5 | Up | 04:49:39 - 05:00:44 | 8872 |
| Tonasket | 04:54:45 | -22.2 | Dark | Down | 31.2 | 245.5 | Up | 04:49:13 - 05:00:18 | 8866 |
| Okanogan | 04:54:45 | -22.3 | Dark | Down | 31.5 | 245.6 | Up | 04:49:13 - 05:00:18 | 8865 |
| Anarchist Mountain Observatory | 04:54:41 | -22.0 | Dark | Down | 31.1 | 245.4 | Up | 04:49:09 - 05:00:14 | 8864 |
| Fall River/Burney | 04:55:24 | -25.9 | Dark | Down | 35.4 | 248.5 | Up | 04:49:51 - 05:00:56 | 8862 |
| Brewster | 04:54:45 | -22.4 | Dark | Down | 31.7 | 245.5 | Up | 04:49:13 - 05:00:18 | 8861 |
| Toppenish/White Swan | 04:54:54 | -23.2 | Dark | Down | 32.8 | 246.0 | Up | 04:49:22 - 05:00:27 | 8860 |
| Oliver | 04:54:38 | -21.8 | Dark | Down | 31.1 | 245.1 | Up | 04:49:06 - 05:00:11 | 8851 |
| Yakima | 04:54:56 | -23.0 | Dark | Down | 32.8 | 245.7 | Up | 04:49:23 - 05:00:28 | 8849 |
| Redmond | 04:55:08 | -24.1 | Dark | Down | 34.1 | 246.6 | Up | 04:49:36 - 05:00:41 | 8848 |
| Wenatchee | 04:54:50 | -22.6 | Dark | Down | 32.3 | 245.4 | Up | 04:49:18 - 05:00:23 | 8848 |
| Manson/Chelan | 04:54:47 | -22.4 | Dark | Down | 32.0 | 245.3 | Up | 04:49:14 - 05:00:19 | 8847 |
| Goldendale | 04:54:59 | -23.3 | Dark | Down | 33.2 | 246.0 | Up | 04:49:27 - 05:00:32 | 8847 |
| Penticton | 04:54:38 | -21.6 | Dark | Down | 31.0 | 244.9 | Up | 04:49:06 - 05:00:11 | 8845 |
| Ellensburg | 04:54:52 | -22.7 | Dark | Down | 32.6 | 245.5 | Up | 04:49:20 - 05:00:25 | 8844 |
| Bend | 04:55:06 | -24.1 | Dark | Down | 34.3 | 246.6 | Up | 04:49:34 - 05:00:39 | 8843 |
| Maupin | 04:55:03 | -23.6 | Dark | Down | 33.7 | 246.1 | Up | 04:49:30 - 05:00:35 | 8842 |
| Kelowna | 04:54:38 | -21.4 | Dark | Down | 30.8 | 244.8 | Up | 04:49:06 - 05:00:11 | 8842 |
| Clarence Fulton | 04:54:36 | -21.2 | Dark | Down | 30.5 | 244.7 | Up | 04:49:03 - 05:00:08 | 8841 |
| Oregon Observatory | 04:55:08 | -24.2 | Dark | Down | 34.4 | 246.6 | Up | 04:49:36 - 05:00:41 | 8839 |
| Summerland | 04:54:38 | -21.5 | Dark | Down | 31.0 | 244.8 | Up | 04:49:06 - 05:00:11 | 8838 |
| La Pine/Gilchrist | 04:55:08 | -24.3 | Dark | Down | 34.5 | 246.7 | Up | 04:49:36 - 05:00:41 | 8838 |
| Klamath Falls | 04:55:19 | -25.0 | Dark | Down | 35.2 | 247.4 | Up | 04:49:46 - 05:00:51 | 8835 |
| The Dalles | 04:54:58 | -23.3 | Dark | Down | 33.6 | 245.8 | Up | 04:49:26 - 05:00:31 | 8832 |
| Peachland | 04:54:36 | -21.3 | Dark | Down | 31.0 | 244.6 | Up | 04:49:04 - 05:00:09 | 8832 |
| Chiloquin | 04:55:17 | -24.7 | Dark | Down | 35.2 | 247.1 | Up | 04:49:44 - 05:00:49 | 8828 |
| Sisters | 04:55:05 | -23.8 | Dark | Down | 34.3 | 246.2 | Up | 04:49:33 - 05:00:38 | 8828 |
| Victoria | 04:54:40 | -20.2 | Dark | Down | 33.7 | 241.9 | Up | 04:49:07 - 05:00:12 | 8686 |
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 13MR18, (2021/09/06 04:57UT) Object RA Dec mag sep mel Arcturus 14:15:38.0 +19:10:14 0.0 34.34 54 Unukalhai 15:44:16.3 +06:25:33 2.6 11.89 78 29 Her 16:32:36.1 +11:29:15 6.5 2.55 88 PPM 162758 16:31:56.5 +09:24:52 7.3 0.49 88 PPM 162741 16:31:13.8 +08:49:15 9.9 0.14 88 13MR18 16:31:10.8 +08:57:25 12.4 88 Positions are for J2000
Event circumstances last updated at 2021/07/25 00:49:02 UT
Marc W. Buie, Southwest Research Institute