Event between (531074) 12DX98 and star GA0760:04808133 with event index number of 1600520
Geocentric closest approach at 2021/02/28 08:34:21 UTC
J2000 position of star is 13:29:24.5 -13:03:13
Equinox of date position of star is 13:30:31.7 -13:09:43
Stellar brightness G=14.9,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 33 degrees from the moon.
Moon is 98% illuminated.
TNO apparent brightness V=22.9
[RECON map]
TNO is 35.2 AU from the Sun
and 34.5 AU from the Earth.
The TNO is moving 15.3
km/sec on the sky relative to the star, or,
2.2 arcsec/hr.
The 1-sigma error in the time of the event is 152 seconds.
The 1-sigma cross-track error in the shadow position is
1869 km.
The sky-plane scale is
24992.9 km/arcsec.
The TNO has an absolute magnitude Hv=7.3
Diameter=206.1 km assuming a 5% albedo -- 13.4 sec chord
Diameter=84.1 km assuming a 30% albedo -- 5.5 sec chord
Dynamical classification is 2:1E
Star training set for 531074, (2021/02/28 08:34UT) Object RA Dec mag sep mel Spica 13:26:18.7 -11:16:16 1.0 2.15 31 68 Vir 13:27:50.4 -12:49:02 5.3 0.74 32 PPM 227310 13:28:23.4 -13:25:11 8.0 0.58 33 PPM 227388 13:31:30.3 -13:02:12 9.7 0.27 33 531074 13:30:32.1 -13:09:45 14.9 33 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 19.8 km
RECON observability=1.0 and success probability=2.4%
| 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 | 08:37:59 | -47.2 | Dark | Up | 20.1 | 144.8 | Low | 08:24:48 - 08:51:10 | 5910 |
| Kelowna | 08:38:03 | -47.6 | Dark | Up | 20.4 | 144.6 | Low | 08:24:52 - 08:51:14 | 5883 |
| Peachland | 08:38:03 | -47.7 | Dark | Up | 20.4 | 144.2 | Low | 08:24:52 - 08:51:14 | 5869 |
| Summerland | 08:38:02 | -47.9 | Dark | Up | 20.5 | 144.3 | Low | 08:24:51 - 08:51:13 | 5862 |
| Penticton | 08:38:03 | -47.9 | Dark | Up | 20.6 | 144.4 | Low | 08:24:52 - 08:51:14 | 5860 |
| Oliver | 08:38:03 | -48.2 | Dark | Up | 20.9 | 144.3 | Low | 08:24:52 - 08:51:14 | 5838 |
| Anarchist Mountain Observatory | 08:38:03 | -48.4 | Dark | Up | 21.1 | 144.5 | Low | 08:24:52 - 08:51:14 | 5832 |
| Tonasket | 08:38:03 | -48.7 | Dark | Up | 21.4 | 144.3 | Low | 08:24:52 - 08:51:14 | 5810 |
| Okanogan | 08:38:04 | -49.1 | Dark | Up | 21.6 | 144.1 | Low | 08:24:53 - 08:51:15 | 5785 |
| Brewster | 08:38:05 | -49.3 | Dark | Up | 21.7 | 143.9 | Low | 08:24:54 - 08:51:16 | 5763 |
| Manson/Chelan | 08:38:08 | -49.6 | Dark | Up | 21.7 | 143.5 | Low | 08:24:57 - 08:51:19 | 5741 |
| Victoria | 08:38:18 | -49.2 | Dark | Up | 19.9 | 140.6 | Really Low | 08:25:07 - 08:51:29 | 5711 |
| Wenatchee | 08:38:10 | -50.1 | Dark | Up | 22.1 | 143.2 | Low | 08:24:59 - 08:51:21 | 5706 |
| Ellensburg | 08:38:10 | -50.5 | Dark | Up | 22.3 | 142.9 | Low | 08:24:59 - 08:51:21 | 5674 |
| Pasco | 08:38:08 | -51.1 | Dark | Up | 23.5 | 144.1 | Low | 08:24:57 - 08:51:19 | 5656 |
| Yakima | 08:38:13 | -50.9 | Dark | Up | 22.6 | 142.8 | Low | 08:25:02 - 08:51:24 | 5646 |
| PNWRO | 08:38:08 | -51.3 | Dark | Up | 23.8 | 144.2 | Low | 08:24:57 - 08:51:19 | 5644 |
| Toppenish/White Swan | 08:38:11 | -51.1 | Dark | Up | 22.9 | 142.9 | Low | 08:25:00 - 08:51:22 | 5635 |
| Goldendale | 08:38:14 | -51.7 | Dark | Up | 23.1 | 142.3 | Low | 08:25:03 - 08:51:25 | 5588 |
| The Dalles | 08:38:17 | -52.0 | Dark | Up | 23.1 | 141.9 | Low | 08:25:06 - 08:51:28 | 5564 |
| Dunrhomin | 08:37:13 | -52.5 | Dark | Up | 33.6 | 156.6 | Up | 08:24:02 - 08:50:24 | 5560 |
| Maupin | 08:38:18 | -52.4 | Dark | Up | 23.5 | 141.9 | Low | 08:25:07 - 08:51:29 | 5537 |
| Redmond | 08:38:19 | -53.3 | Dark | Up | 24.2 | 141.6 | Low | 08:25:08 - 08:51:30 | 5472 |
| Sisters | 08:38:20 | -53.3 | Dark | Up | 24.0 | 141.2 | Low | 08:25:09 - 08:51:31 | 5464 |
| Bend | 08:38:21 | -53.5 | Dark | Up | 24.3 | 141.4 | Low | 08:25:10 - 08:51:32 | 5453 |
| Oregon Observatory | 08:38:20 | -53.7 | Dark | Up | 24.4 | 141.2 | Low | 08:25:09 - 08:51:31 | 5438 |
| La Pine/Gilchrist | 08:38:22 | -53.9 | Dark | Up | 24.5 | 141.1 | Low | 08:25:11 - 08:51:33 | 5422 |
| North Lake | 08:38:21 | -54.2 | Dark | Up | 25.1 | 141.6 | Low | 08:25:10 - 08:51:32 | 5405 |
| Paisley | 08:38:20 | -54.7 | Dark | Up | 25.7 | 141.8 | Low | 08:25:09 - 08:51:31 | 5373 |
| Lakeview | 08:38:20 | -55.2 | Dark | Up | 26.2 | 141.8 | Low | 08:25:09 - 08:51:31 | 5341 |
| Klamath Falls | 08:38:25 | -55.4 | Dark | Up | 25.5 | 140.5 | Low | 08:25:14 - 08:51:36 | 5309 |
| Cedarville | 08:38:20 | -55.8 | Dark | Up | 26.8 | 141.8 | Low | 08:25:09 - 08:51:31 | 5297 |
| Fall River/Burney | 08:38:26 | -56.5 | Dark | Up | 26.6 | 140.5 | Low | 08:25:15 - 08:51:37 | 5230 |
| Susanville | 08:38:24 | -57.0 | Dark | Up | 27.5 | 141.0 | Low | 08:25:13 - 08:51:35 | 5201 |
| Gimple | 08:38:26 | -57.3 | Dark | Up | 27.6 | 140.7 | Low | 08:25:15 - 08:51:37 | 5174 |
| Greenville | 08:38:26 | -57.3 | Dark | Up | 27.5 | 140.6 | Low | 08:25:15 - 08:51:37 | 5172 |
| Portola | 08:38:24 | -57.6 | Dark | Up | 28.0 | 140.9 | Low | 08:25:13 - 08:51:35 | 5160 |
| Quincy | 08:38:27 | -57.5 | Dark | Up | 27.7 | 140.5 | Low | 08:25:16 - 08:51:38 | 5157 |
| Reno | 08:38:22 | -57.7 | Dark | Up | 28.5 | 141.5 | Low | 08:25:11 - 08:51:33 | 5156 |
| Yerington | 08:38:20 | -58.2 | Dark | Up | 29.3 | 141.9 | Low | 08:25:09 - 08:51:31 | 5129 |
| Carson City | 08:38:22 | -58.1 | Dark | Up | 28.8 | 141.4 | Low | 08:25:11 - 08:51:33 | 5129 |
| Gardnerville | 08:38:23 | -58.3 | Dark | Up | 29.0 | 141.3 | Low | 08:25:12 - 08:51:34 | 5111 |
| Tonopah | 08:38:12 | -58.6 | Dark | Up | 30.9 | 143.5 | Up | 08:25:01 - 08:51:23 | 5107 |
| Hawthorne | 08:38:18 | -58.5 | Dark | Up | 29.9 | 142.3 | Low | 08:25:07 - 08:51:29 | 5107 |
| Lee Vining | 08:38:21 | -59.1 | Dark | Up | 30.1 | 141.6 | Up | 08:25:10 - 08:51:32 | 5051 |
| Indian Springs | 08:38:08 | -59.6 | Dark | Up | 32.8 | 144.4 | Up | 08:24:57 - 08:51:19 | 5029 |
| Beatty | 08:38:13 | -59.6 | Dark | Up | 32.1 | 143.5 | Up | 08:25:02 - 08:51:24 | 5027 |
| Bishop | 08:38:19 | -59.6 | Dark | Up | 30.9 | 142.1 | Up | 08:25:08 - 08:51:30 | 5022 |
| Henderson | 08:38:05 | -59.9 | Dark | Up | 33.6 | 144.9 | Up | 08:24:54 - 08:51:16 | 5005 |
| Patrick | 08:38:00 | -60.1 | Dark | Up | 34.6 | 145.8 | Up | 08:24:49 - 08:51:11 | 4984 |
| Kingman/Dolan Springs | 08:38:03 | -60.4 | Dark | Up | 34.7 | 145.6 | Up | 08:24:52 - 08:51:14 | 4961 |
| Laughlin/Bullhead City | 08:38:03 | -60.6 | Dark | Up | 34.5 | 145.0 | Up | 08:24:52 - 08:51:14 | 4945 |
| Mohave Valley | 08:38:04 | -60.8 | Dark | Up | 34.7 | 144.9 | Up | 08:24:53 - 08:51:15 | 4923 |
| George/Scottsdale | 08:37:51 | -60.9 | Dark | Up | 36.9 | 147.3 | Up | 08:24:40 - 08:51:02 | 4899 |
| Lake Havasu City | 08:38:03 | -61.1 | Dark | Up | 35.2 | 145.0 | Up | 08:24:52 - 08:51:14 | 4898 |
| Parker | 08:38:03 | -61.4 | Dark | Up | 35.5 | 144.9 | Up | 08:24:52 - 08:51:14 | 4870 |
| Blythe | 08:38:05 | -62.0 | Dark | Up | 35.8 | 144.4 | Up | 08:24:54 - 08:51:16 | 4819 |
| CPSLO | 08:38:32 | -62.0 | Dark | Up | 31.4 | 139.1 | Up | 08:25:21 - 08:51:43 | 4796 |
| Idyllwild | 08:38:16 | -62.6 | Dark | Up | 34.6 | 142.3 | Up | 08:25:05 - 08:51:27 | 4773 |
| Calipatria | 08:38:11 | -62.8 | Dark | Up | 35.7 | 143.2 | Up | 08:25:00 - 08:51:22 | 4753 |
| Wildwood | 08:38:24 | -62.7 | Dark | Up | 33.4 | 140.6 | Up | 08:25:13 - 08:51:35 | 4751 |
| Yuma | 08:38:06 | -62.8 | Dark | Up | 36.5 | 143.9 | Up | 08:24:55 - 08:51:17 | 4741 |
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 531074, (2021/02/28 08:34UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 2.15 31 68 Vir 13:26:43.0 -12:42:28 5.3 0.74 32 PPM 227310 13:27:15.8 -13:18:37 8.0 0.58 33 PPM 227388 13:30:22.7 -12:55:41 9.7 0.27 33 531074 13:29:24.5 -13:03:13 14.9 33 Positions are for J2000
Event circumstances last updated at 2021/01/18 21:56:12 UT
Marc W. Buie, Southwest Research Institute