Event between 12BZ159 and star GA0920:03589283 with event index number of 1587595
Geocentric closest approach at 2021/05/04 08:18:43 UTC
J2000 position of star is 11:37:21.8 +02:40:40
Equinox of date position of star is 11:38:27.4 +02:33:35
Stellar brightness G=16.6,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 146 degrees from the moon.
Moon is 45% illuminated.
TNO apparent brightness V=22.5
[RECON map]
TNO is 38.1 AU from the Sun
and 37.5 AU from the Earth.
The TNO is moving 14.2
km/sec on the sky relative to the star, or,
1.9 arcsec/hr.
The 1-sigma error in the time of the event is 266 seconds.
The 1-sigma cross-track error in the shadow position is
1778 km.
The sky-plane scale is
27186.8 km/arcsec.
The TNO has an absolute magnitude Hv=6.6
Diameter=285.8 km assuming a 5% albedo -- 20.1 sec chord
Diameter=116.7 km assuming a 30% albedo -- 8.2 sec chord
Dynamical classification is CLASSICAL
Star training set for 12BZ159, (2021/05/04 08:19UT) Object RA Dec mag sep mel Regulus 10:09:30.4 +11:51:44 1.3 23.92 170 Denebola 11:50:08.8 +14:27:10 2.1 12.24 148 89 Leo 11:35:27.5 +02:56:29 6.2 0.84 147 PPM 158073 11:40:33.8 +02:43:43 8.4 0.55 146 PPM 158056 11:39:30.9 +02:14:47 10.0 0.41 146 PPM 158037 11:38:25.8 +02:26:39 10.8 0.12 146 12BZ159 11:38:27.5 +02:33:35 16.6 146 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
3.4 sigma about the mid-time.
The median site spacing is 10.9 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) |
| Clarence Fulton | 08:17:38 | -23.5 | Dark | Down | 24.7 | 241.7 | Low | 08:02:38 - 08:32:38 | 13489 |
| Kelowna | 08:17:32 | -23.9 | Dark | Down | 25.0 | 241.7 | Low | 08:02:32 - 08:32:32 | 13471 |
| Peachland | 08:17:34 | -24.0 | Dark | Down | 25.2 | 241.5 | Low | 08:02:34 - 08:32:34 | 13461 |
| Summerland | 08:17:31 | -24.2 | Dark | Down | 25.3 | 241.6 | Low | 08:02:31 - 08:32:31 | 13457 |
| Penticton | 08:17:29 | -24.2 | Dark | Down | 25.2 | 241.8 | Low | 08:02:29 - 08:32:29 | 13457 |
| Oliver | 08:17:27 | -24.6 | Dark | Down | 25.4 | 241.9 | Low | 08:02:27 - 08:32:27 | 13443 |
| Anarchist Mountain Observatory | 08:17:25 | -24.7 | Dark | Down | 25.4 | 242.1 | Low | 08:02:25 - 08:32:25 | 13441 |
| Tonasket | 08:17:27 | -25.0 | Dark | Down | 25.6 | 242.2 | Low | 08:02:27 - 08:32:27 | 13426 |
| Okanogan | 08:17:20 | -25.4 | Dark | Down | 25.8 | 242.2 | Low | 08:02:20 - 08:32:20 | 13410 |
| Brewster | 08:17:22 | -25.7 | Dark | Down | 26.1 | 242.1 | Low | 08:02:22 - 08:32:22 | 13394 |
| Manson/Chelan | 08:17:24 | -25.9 | Dark | Down | 26.4 | 241.9 | Low | 08:02:24 - 08:32:24 | 13377 |
| Wenatchee | 08:17:17 | -26.4 | Dark | Down | 26.7 | 241.9 | Low | 08:02:17 - 08:32:17 | 13354 |
| Dunrhomin | 08:15:52 | -30.8 | Dark | Down | 19.2 | 256.7 | Really Low | 08:00:52 - 08:30:52 | 13333 |
| Ellensburg | 08:17:17 | -26.8 | Dark | Down | 27.0 | 241.9 | Low | 08:02:17 - 08:32:17 | 13331 |
| Victoria | 08:17:33 | -25.4 | Dark | Down | 27.9 | 238.7 | Low | 08:02:33 - 08:32:33 | 13331 |
| Pasco | 08:17:06 | -27.4 | Dark | Down | 26.5 | 243.5 | Low | 08:02:06 - 08:32:06 | 13330 |
| PNWRO | 08:17:04 | -27.7 | Dark | Down | 26.5 | 243.8 | Low | 08:02:04 - 08:32:04 | 13325 |
| Yakima | 08:17:13 | -27.2 | Dark | Down | 27.3 | 242.1 | Low | 08:02:13 - 08:32:13 | 13313 |
| Toppenish/White Swan | 08:17:11 | -27.4 | Dark | Down | 27.3 | 242.3 | Low | 08:02:11 - 08:32:11 | 13307 |
| Goldendale | 08:17:09 | -28.0 | Dark | Down | 27.8 | 242.2 | Low | 08:02:09 - 08:32:09 | 13273 |
| The Dalles | 08:17:10 | -28.2 | Dark | Down | 28.1 | 242.0 | Low | 08:02:10 - 08:32:10 | 13253 |
| Maupin | 08:17:05 | -28.6 | Dark | Down | 28.3 | 242.2 | Low | 08:02:05 - 08:32:05 | 13237 |
| Redmond | 08:16:59 | -29.6 | Dark | Down | 28.8 | 242.6 | Low | 08:01:59 - 08:31:59 | 13192 |
| Sisters | 08:17:01 | -29.6 | Dark | Down | 29.0 | 242.2 | Low | 08:02:01 - 08:32:01 | 13184 |
| Bend | 08:17:02 | -29.8 | Dark | Down | 28.9 | 242.6 | Low | 08:02:02 - 08:32:02 | 13178 |
| Oregon Observatory | 08:16:59 | -30.0 | Dark | Down | 29.1 | 242.5 | Low | 08:01:59 - 08:31:59 | 13167 |
| La Pine/Gilchrist | 08:17:02 | -30.2 | Dark | Down | 29.2 | 242.6 | Low | 08:02:02 - 08:32:02 | 13156 |
| North Lake | 08:16:54 | -30.6 | Dark | Down | 29.1 | 243.3 | Low | 08:01:54 - 08:31:54 | 13149 |
| Paisley | 08:16:49 | -31.1 | Dark | Down | 29.1 | 243.9 | Low | 08:01:49 - 08:31:49 | 13130 |
| Lakeview | 08:16:45 | -31.6 | Dark | Down | 29.2 | 244.3 | Low | 08:01:45 - 08:31:45 | 13109 |
| Chiloquin | 08:16:52 | -31.3 | Dark | Down | 30.0 | 242.8 | Low | 08:01:52 - 08:31:52 | 13091 |
| Cedarville | 08:16:42 | -32.2 | Dark | Down | 29.4 | 244.7 | Low | 08:01:42 - 08:31:42 | 13079 |
| Klamath Falls | 08:16:52 | -31.6 | Dark | Down | 30.1 | 243.1 | Up | 08:01:52 - 08:31:52 | 13075 |
| Fall River/Burney | 08:16:42 | -32.8 | Dark | Down | 30.4 | 244.0 | Up | 08:01:42 - 08:31:42 | 13022 |
| Susanville | 08:16:35 | -33.4 | Dark | Down | 30.2 | 244.9 | Up | 08:01:35 - 08:31:35 | 13007 |
| Gimple | 08:16:33 | -33.7 | Dark | Down | 30.5 | 244.9 | Up | 08:01:33 - 08:31:33 | 12987 |
| Greenville | 08:16:35 | -33.7 | Dark | Down | 30.5 | 244.8 | Up | 08:01:35 - 08:31:35 | 12985 |
| Reno | 08:16:26 | -34.2 | Dark | Down | 30.0 | 246.0 | Low | 08:01:26 - 08:31:26 | 12981 |
| Portola | 08:16:31 | -34.0 | Dark | Down | 30.3 | 245.4 | Up | 08:01:31 - 08:31:31 | 12979 |
| Quincy | 08:16:34 | -33.9 | Dark | Down | 30.6 | 244.9 | Up | 08:01:34 - 08:31:34 | 12973 |
| Yerington | 08:16:21 | -34.7 | Dark | Down | 29.8 | 246.8 | Low | 08:01:21 - 08:31:21 | 12966 |
| Tonopah | 08:16:08 | -35.4 | Dark | Down | 28.7 | 248.8 | Low | 08:01:08 - 08:31:08 | 12963 |
| Carson City | 08:16:25 | -34.5 | Dark | Down | 30.1 | 246.2 | Up | 08:01:25 - 08:31:25 | 12961 |
| Hawthorne | 08:16:17 | -35.1 | Dark | Down | 29.6 | 247.5 | Low | 08:01:17 - 08:31:17 | 12954 |
| Gardnerville | 08:16:24 | -34.8 | Dark | Down | 30.2 | 246.4 | Up | 08:01:24 - 08:31:24 | 12949 |
| Indian Springs | 08:15:56 | -36.7 | Dark | Down | 28.1 | 250.7 | Low | 08:00:56 - 08:30:56 | 12914 |
| Lee Vining | 08:16:15 | -35.7 | Dark | Down | 30.1 | 247.4 | Up | 08:01:15 - 08:31:15 | 12909 |
| Beatty | 08:16:01 | -36.5 | Dark | Down | 28.8 | 249.7 | Low | 08:01:01 - 08:31:01 | 12906 |
| Henderson | 08:15:50 | -37.1 | Dark | Down | 27.8 | 251.4 | Low | 08:00:50 - 08:30:50 | 12899 |
| Bishop | 08:16:10 | -36.2 | Dark | Down | 29.9 | 248.3 | Low | 08:01:10 - 08:31:10 | 12893 |
| Patrick | 08:15:42 | -37.5 | Dark | Down | 27.2 | 252.5 | Low | 08:00:42 - 08:30:42 | 12888 |
| Kingman/Dolan Springs | 08:15:42 | -37.8 | Dark | Down | 27.4 | 252.5 | Low | 08:00:42 - 08:30:42 | 12871 |
| Laughlin/Bullhead City | 08:15:42 | -37.9 | Dark | Down | 27.8 | 252.1 | Low | 08:00:42 - 08:30:42 | 12856 |
| Mohave Valley | 08:15:43 | -38.1 | Dark | Down | 27.9 | 252.3 | Low | 08:00:43 - 08:30:43 | 12840 |
| George/Scottsdale | 08:15:28 | -38.7 | Dark | Down | 26.1 | 254.7 | Low | 08:00:28 - 08:30:28 | 12832 |
| Lake Havasu City | 08:15:38 | -38.5 | Dark | Down | 27.8 | 252.6 | Low | 08:00:38 - 08:30:38 | 12821 |
| Parker | 08:15:35 | -38.8 | Dark | Down | 27.9 | 252.8 | Low | 08:00:35 - 08:30:35 | 12800 |
| Blythe | 08:15:33 | -39.4 | Dark | Down | 28.3 | 252.9 | Low | 08:00:33 - 08:30:33 | 12760 |
| Idyllwild | 08:15:43 | -39.6 | Dark | Down | 29.9 | 251.4 | Low | 08:00:43 - 08:30:43 | 12715 |
| CPSLO | 08:16:06 | -38.5 | Dark | Down | 32.3 | 247.6 | Up | 08:01:06 - 08:31:06 | 12708 |
| Calipatria | 08:15:35 | -40.0 | Dark | Down | 29.2 | 252.5 | Low | 08:00:35 - 08:30:35 | 12705 |
| Yuma | 08:15:28 | -40.3 | Dark | Down | 28.6 | 253.3 | Low | 08:00:28 - 08:30:28 | 12700 |
| Wildwood | 08:15:52 | -39.5 | Dark | Down | 31.2 | 249.8 | Up | 08:00:52 - 08:30:52 | 12688 |
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 12BZ159, (2021/05/04 08:19UT) Object RA Dec mag sep mel Regulus 10:08:22.0 +11:58:02 1.3 23.92 170 Denebola 11:49:02.9 +14:34:17 2.1 12.24 148 89 Leo 11:34:21.7 +03:03:34 6.2 0.84 147 PPM 158073 11:39:28.1 +02:50:49 8.4 0.55 146 PPM 158056 11:38:25.2 +02:21:53 10.0 0.41 146 PPM 158037 11:37:20.1 +02:33:45 10.8 0.12 146 12BZ159 11:37:21.8 +02:40:40 16.6 146 Positions are for J2000
Event circumstances last updated at 2021/04/21 22:32:13 UT
Marc W. Buie, Southwest Research Institute