Event between (536922) 15FP345 and star GA0860:04332213 with event index number of 1620439
Geocentric closest approach at 2021/04/08 08:52:37 UTC
J2000 position of star is 14:22:06.3 -03:18:15
Equinox of date position of star is 14:23:12.0 -03:23:58
Stellar brightness G=16.4,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 123 degrees from the moon.
Moon is 13% illuminated.
TNO apparent brightness V=22.5
[RECON map]
TNO is 36.5 AU from the Sun
and 35.5 AU from the Earth.
The TNO is moving 23.3
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 119 seconds.
The 1-sigma cross-track error in the shadow position is
1923 km.
The sky-plane scale is
25780.7 km/arcsec.
The TNO has an absolute magnitude Hv=6.9
Diameter=252.4 km assuming a 5% albedo -- 10.8 sec chord
Diameter=103.0 km assuming a 30% albedo -- 4.4 sec chord
Dynamical classification is 7:4EEE+7:4EII
Star training set for 536922, (2021/04/08 08:53UT) Object RA Dec mag sep mel Spica 13:26:19.0 -11:16:18 1.0 16.14 132 27Bet Lib 15:18:09.3 -09:27:36 2.6 14.93 108 105Phi Vir 14:29:18.0 -02:19:20 4.8 1.86 121 PPM 197541 14:27:04.3 -03:48:29 8.4 1.05 121 PPM 197473 14:23:09.3 -03:25:54 9.9 0.03 123 536922 14:23:12.6 -03:24:01 16.4 122 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 13.2 km
RECON observability=1.0 and success probability=13.3%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Clarence Fulton | 08:54:16 | -31.2 | Dark | Down | 36.3 | 174.5 | Up | 08:43:51 - 09:04:41 | 2501 |
| Kelowna | 08:54:16 | -31.6 | Dark | Down | 36.7 | 174.3 | Up | 08:43:51 - 09:04:41 | 2472 |
| Peachland | 08:54:16 | -31.7 | Dark | Down | 36.8 | 173.9 | Up | 08:43:51 - 09:04:41 | 2456 |
| Summerland | 08:54:16 | -31.9 | Dark | Down | 36.9 | 174.0 | Up | 08:43:51 - 09:04:41 | 2449 |
| Penticton | 08:54:16 | -31.9 | Dark | Down | 37.0 | 174.2 | Up | 08:43:51 - 09:04:41 | 2448 |
| Oliver | 08:54:16 | -32.2 | Dark | Down | 37.4 | 174.1 | Up | 08:43:51 - 09:04:41 | 2425 |
| Anarchist Mountain Observatory | 08:54:15 | -32.4 | Dark | Down | 37.5 | 174.3 | Up | 08:43:50 - 09:04:40 | 2420 |
| Tonasket | 08:54:15 | -32.7 | Dark | Down | 37.8 | 174.2 | Up | 08:43:50 - 09:04:40 | 2397 |
| Okanogan | 08:54:15 | -33.0 | Dark | Down | 38.2 | 174.0 | Up | 08:43:50 - 09:04:40 | 2371 |
| Brewster | 08:54:15 | -33.3 | Dark | Down | 38.4 | 173.7 | Up | 08:43:50 - 09:04:40 | 2347 |
| Manson/Chelan | 08:54:16 | -33.6 | Dark | Down | 38.6 | 173.3 | Up | 08:43:51 - 09:04:41 | 2322 |
| Wenatchee | 08:54:16 | -34.1 | Dark | Down | 39.1 | 173.0 | Up | 08:43:51 - 09:04:41 | 2285 |
| Victoria | 08:54:26 | -33.5 | Dark | Down | 37.6 | 169.3 | Up | 08:44:01 - 09:04:51 | 2270 |
| Dunrhomin | 08:53:19 | -36.0 | Dark | Down | 45.6 | 193.6 | Up | 08:42:54 - 09:03:44 | 2263 |
| Ellensburg | 08:54:16 | -34.5 | Dark | Down | 39.5 | 172.7 | Up | 08:43:51 - 09:04:41 | 2250 |
| Pasco | 08:54:12 | -35.0 | Dark | Down | 40.3 | 174.4 | Up | 08:43:47 - 09:04:37 | 2242 |
| PNWRO | 08:54:11 | -35.2 | Dark | Down | 40.6 | 174.7 | Up | 08:43:46 - 09:04:36 | 2232 |
| Yakima | 08:54:16 | -34.9 | Dark | Down | 39.9 | 172.6 | Up | 08:43:51 - 09:04:41 | 2222 |
| Toppenish/White Swan | 08:54:16 | -35.1 | Dark | Down | 40.1 | 172.8 | Up | 08:43:51 - 09:04:41 | 2212 |
| Goldendale | 08:54:16 | -35.7 | Dark | Down | 40.6 | 172.2 | Up | 08:43:51 - 09:04:41 | 2160 |
| The Dalles | 08:54:17 | -36.0 | Dark | Down | 40.8 | 171.7 | Up | 08:43:52 - 09:04:42 | 2133 |
| Maupin | 08:54:17 | -36.4 | Dark | Down | 41.2 | 171.8 | Up | 08:43:52 - 09:04:42 | 2107 |
| Redmond | 08:54:16 | -37.3 | Dark | Down | 42.1 | 171.5 | Up | 08:43:51 - 09:04:41 | 2039 |
| Sisters | 08:54:17 | -37.3 | Dark | Down | 42.0 | 171.0 | Up | 08:43:52 - 09:04:42 | 2028 |
| Bend | 08:54:16 | -37.5 | Dark | Down | 42.3 | 171.3 | Up | 08:43:51 - 09:04:41 | 2019 |
| Oregon Observatory | 08:54:16 | -37.7 | Dark | Down | 42.4 | 171.1 | Up | 08:43:51 - 09:04:41 | 2003 |
| La Pine/Gilchrist | 08:54:17 | -37.9 | Dark | Down | 42.6 | 171.0 | Up | 08:43:52 - 09:04:42 | 1986 |
| North Lake | 08:54:14 | -38.2 | Dark | Down | 43.1 | 171.7 | Up | 08:43:49 - 09:04:39 | 1973 |
| Paisley | 08:54:13 | -38.7 | Dark | Down | 43.7 | 172.2 | Up | 08:43:48 - 09:04:38 | 1944 |
| Lakeview | 08:54:12 | -39.1 | Dark | Down | 44.2 | 172.3 | Up | 08:43:47 - 09:04:37 | 1912 |
| Cedarville | 08:54:10 | -39.7 | Dark | Down | 44.9 | 172.5 | Up | 08:43:45 - 09:04:35 | 1869 |
| Klamath Falls | 08:54:16 | -39.4 | Dark | Down | 44.0 | 170.4 | Up | 08:43:51 - 09:04:41 | 1869 |
| Fall River/Burney | 08:54:14 | -40.4 | Dark | Down | 45.3 | 170.7 | Up | 08:43:49 - 09:04:39 | 1792 |
| Susanville | 08:54:11 | -40.9 | Dark | Down | 46.0 | 171.7 | Up | 08:43:46 - 09:04:36 | 1768 |
| Gimple | 08:54:11 | -41.2 | Dark | Down | 46.2 | 171.3 | Up | 08:43:46 - 09:04:36 | 1740 |
| Greenville | 08:54:11 | -41.2 | Dark | Down | 46.2 | 171.2 | Up | 08:43:46 - 09:04:36 | 1737 |
| Reno | 08:54:07 | -41.5 | Dark | Down | 46.9 | 172.7 | Up | 08:43:42 - 09:04:32 | 1729 |
| Portola | 08:54:09 | -41.4 | Dark | Down | 46.6 | 171.8 | Up | 08:43:44 - 09:04:34 | 1728 |
| Quincy | 08:54:11 | -41.4 | Dark | Down | 46.4 | 171.2 | Up | 08:43:46 - 09:04:36 | 1721 |
| Yerington | 08:54:04 | -41.9 | Dark | Down | 47.5 | 173.6 | Up | 08:43:39 - 09:04:29 | 1708 |
| Tonopah | 08:53:57 | -42.3 | Dark | Down | 48.6 | 176.4 | Up | 08:43:32 - 09:04:22 | 1702 |
| Carson City | 08:54:06 | -41.9 | Dark | Down | 47.3 | 172.7 | Up | 08:43:41 - 09:04:31 | 1702 |
| Hawthorne | 08:54:02 | -42.2 | Dark | Down | 48.0 | 174.3 | Up | 08:43:37 - 09:04:27 | 1690 |
| Gardnerville | 08:54:06 | -42.1 | Dark | Down | 47.5 | 172.7 | Up | 08:43:41 - 09:04:31 | 1684 |
| Indian Springs | 08:53:49 | -43.2 | Dark | Down | 50.1 | 178.6 | Up | 08:43:24 - 09:04:14 | 1638 |
| Lee Vining | 08:54:03 | -42.9 | Dark | Down | 48.5 | 173.5 | Up | 08:43:38 - 09:04:28 | 1629 |
| Beatty | 08:53:54 | -43.2 | Dark | Down | 49.8 | 177.0 | Up | 08:43:29 - 09:04:19 | 1626 |
| Henderson | 08:53:46 | -43.4 | Dark | Down | 50.7 | 179.6 | Up | 08:43:21 - 09:04:11 | 1620 |
| Patrick | 08:53:41 | -43.6 | Dark | Down | 51.3 | 181.4 | Up | 08:43:16 - 09:04:06 | 1609 |
| Bishop | 08:54:00 | -43.2 | Dark | Down | 49.2 | 174.5 | Up | 08:43:35 - 09:04:25 | 1607 |
| Kingman/Dolan Springs | 08:53:42 | -43.9 | Dark | Down | 51.5 | 181.1 | Up | 08:43:17 - 09:04:07 | 1585 |
| Laughlin/Bullhead City | 08:53:44 | -44.1 | Dark | Down | 51.5 | 180.3 | Up | 08:43:19 - 09:04:09 | 1565 |
| George/Scottsdale | 08:53:31 | -44.3 | Dark | Down | 52.9 | 184.7 | Up | 08:43:06 - 09:03:56 | 1545 |
| Mohave Valley | 08:53:42 | -44.3 | Dark | Down | 51.8 | 180.3 | Up | 08:43:17 - 09:04:07 | 1543 |
| Lake Havasu City | 08:53:42 | -44.6 | Dark | Down | 52.2 | 180.7 | Up | 08:43:17 - 09:04:07 | 1519 |
| Parker | 08:53:41 | -44.9 | Dark | Down | 52.6 | 180.7 | Up | 08:43:16 - 09:04:06 | 1492 |
| Blythe | 08:53:41 | -45.5 | Dark | Down | 53.1 | 180.2 | Up | 08:43:16 - 09:04:06 | 1439 |
| Idyllwild | 08:53:49 | -46.1 | Dark | Down | 52.9 | 176.8 | Up | 08:43:24 - 09:04:14 | 1373 |
| Calipatria | 08:53:44 | -46.3 | Dark | Down | 53.6 | 178.7 | Up | 08:43:19 - 09:04:09 | 1364 |
| Yuma | 08:53:40 | -46.3 | Dark | Down | 54.0 | 180.2 | Up | 08:43:15 - 09:04:05 | 1361 |
| CPSLO | 08:54:05 | -45.8 | Dark | Down | 51.0 | 170.7 | Up | 08:43:40 - 09:04:30 | 1360 |
| Wildwood | 08:53:56 | -46.4 | Dark | Down | 52.4 | 173.8 | Up | 08:43:31 - 09:04:21 | 1334 |
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 536922, (2021/04/08 08:53UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 16.14 132 27Bet Lib 15:17:00.3 -09:22:59 2.6 14.93 108 105Phi Vir 14:28:12.0 -02:13:41 4.8 1.86 121 PPM 197541 14:25:57.8 -03:42:47 8.4 1.05 121 PPM 197473 14:22:02.9 -03:20:07 9.9 0.03 123 536922 14:22:06.3 -03:18:15 16.4 123 Positions are for J2000
Event circumstances last updated at 2021/01/19 21:54:38 UT
Marc W. Buie, Southwest Research Institute