Event between 03LD9 and star GA0700:21411912 with event index number of 1662373
Geocentric closest approach at 2021/07/31 08:18:46 UTC
J2000 position of star is 18:14:08.0 -19:08:14
Equinox of date position of star is 18:15:23.6 -19:07:46
Stellar brightness G=16.2,
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 52% illuminated.
TNO apparent brightness V=23.0
[RECON map]
TNO is 42.9 AU from the Sun
and 42.1 AU from the Earth.
The TNO is moving 19.3
km/sec on the sky relative to the star, or,
2.3 arcsec/hr.
The 1-sigma error in the time of the event is 692 seconds.
The 1-sigma cross-track error in the shadow position is
2208 km.
The sky-plane scale is
30534.8 km/arcsec.
The TNO has an absolute magnitude Hv=6.6
Diameter=295.1 km assuming a 5% albedo -- 15.3 sec chord
Diameter=120.5 km assuming a 30% albedo -- 6.2 sec chord
Dynamical classification is SCATNEAR
Star training set for 03LD9, (2021/07/31 08:19UT) Object RA Dec mag sep mel Antares 16:30:44.0 -26:28:41 0.9 25.16 146 Nunki 18:56:36.1 -26:16:05 2.0 11.88 113 PPM 234244 18:16:46.9 -18:39:11 6.1 0.58 122 PPM 234237 18:16:33.0 -18:59:04 7.6 0.31 123 PPM 234215 18:15:23.3 -19:11:28 9.5 0.06 123 03LD9 18:15:24.3 -19:07:46 16.2 123 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
1.3 sigma about the mid-time.
The median site spacing is 22.4 km
RECON observability=0.5 and success probability=6.4%
| 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 | 08:16:11 | -21.5 | Dark | Up | 12.0 | 218.7 | Really Low | 08:01:11 - 08:31:11 | 3620 |
| Victoria | 08:16:18 | -23.3 | Dark | Up | 15.0 | 215.4 | Really Low | 08:01:18 - 08:31:18 | 3609 |
| Peachland | 08:16:11 | -22.0 | Dark | Up | 12.6 | 218.4 | Really Low | 08:01:11 - 08:31:11 | 3604 |
| Kelowna | 08:16:11 | -21.9 | Dark | Up | 12.4 | 218.7 | Really Low | 08:01:11 - 08:31:11 | 3604 |
| Summerland | 08:16:11 | -22.2 | Dark | Up | 12.7 | 218.5 | Really Low | 08:01:11 - 08:31:11 | 3595 |
| Penticton | 08:16:10 | -22.2 | Dark | Up | 12.7 | 218.6 | Really Low | 08:01:10 - 08:31:10 | 3589 |
| Oliver | 08:16:10 | -22.6 | Dark | Up | 12.9 | 218.7 | Really Low | 08:01:10 - 08:31:10 | 3571 |
| Anarchist Mountain Observatory | 08:16:08 | -22.8 | Dark | Up | 13.0 | 218.9 | Really Low | 08:01:08 - 08:31:08 | 3559 |
| Tonasket | 08:16:07 | -23.1 | Dark | Up | 13.3 | 218.8 | Really Low | 08:01:07 - 08:31:07 | 3544 |
| Okanogan | 08:16:07 | -23.4 | Dark | Up | 13.6 | 218.8 | Really Low | 08:01:07 - 08:31:07 | 3530 |
| Brewster | 08:16:06 | -23.7 | Dark | Up | 13.9 | 218.6 | Really Low | 08:01:06 - 08:31:06 | 3519 |
| Manson/Chelan | 08:16:07 | -23.9 | Dark | Up | 14.2 | 218.3 | Really Low | 08:01:07 - 08:31:07 | 3515 |
| Wenatchee | 08:16:07 | -24.4 | Dark | Up | 14.7 | 218.3 | Really Low | 08:01:07 - 08:31:07 | 3493 |
| Ellensburg | 08:16:07 | -24.8 | Dark | Up | 15.1 | 218.1 | Really Low | 08:01:07 - 08:31:07 | 3476 |
| Yakima | 08:16:05 | -25.2 | Dark | Up | 15.4 | 218.2 | Really Low | 08:01:05 - 08:31:05 | 3454 |
| Toppenish/White Swan | 08:16:05 | -25.4 | Dark | Up | 15.5 | 218.4 | Really Low | 08:01:05 - 08:31:05 | 3439 |
| Goldendale | 08:16:04 | -26.0 | Dark | Up | 16.1 | 218.1 | Really Low | 08:01:04 - 08:31:04 | 3417 |
| The Dalles | 08:16:05 | -26.2 | Dark | Up | 16.5 | 217.8 | Really Low | 08:01:05 - 08:31:05 | 3411 |
| Pasco | 08:16:00 | -25.5 | Dark | Up | 15.1 | 219.5 | Really Low | 08:01:00 - 08:31:00 | 3407 |
| PNWRO | 08:15:59 | -25.7 | Dark | Up | 15.1 | 219.7 | Really Low | 08:00:59 - 08:30:59 | 3388 |
| Maupin | 08:16:04 | -26.6 | Dark | Up | 16.7 | 218.0 | Really Low | 08:01:04 - 08:31:04 | 3385 |
| Sisters | 08:16:03 | -27.5 | Dark | Up | 17.7 | 217.7 | Really Low | 08:01:03 - 08:31:03 | 3345 |
| Redmond | 08:16:02 | -27.5 | Dark | Up | 17.5 | 218.1 | Really Low | 08:01:02 - 08:31:02 | 3336 |
| Bend | 08:16:03 | -27.8 | Dark | Up | 17.7 | 218.0 | Really Low | 08:01:03 - 08:31:03 | 3326 |
| Oregon Observatory | 08:16:02 | -27.9 | Dark | Up | 17.9 | 217.9 | Really Low | 08:01:02 - 08:31:02 | 3319 |
| La Pine/Gilchrist | 08:16:01 | -28.1 | Dark | Up | 18.1 | 217.9 | Really Low | 08:01:01 - 08:31:01 | 3308 |
| North Lake | 08:15:59 | -28.6 | Dark | Up | 18.2 | 218.5 | Really Low | 08:00:59 - 08:30:59 | 3270 |
| Chiloquin | 08:16:00 | -29.3 | Dark | Up | 19.2 | 217.8 | Really Low | 08:01:00 - 08:31:00 | 3249 |
| Paisley | 08:15:56 | -29.1 | Dark | Up | 18.5 | 218.9 | Really Low | 08:00:56 - 08:30:56 | 3229 |
| Klamath Falls | 08:16:00 | -29.6 | Dark | Up | 19.4 | 217.9 | Really Low | 08:01:00 - 08:31:00 | 3226 |
| Lakeview | 08:15:54 | -29.6 | Dark | Up | 18.8 | 219.2 | Really Low | 08:00:54 - 08:30:54 | 3194 |
| Cedarville | 08:15:52 | -30.3 | Dark | Up | 19.2 | 219.5 | Really Low | 08:00:52 - 08:30:52 | 3150 |
| Fall River/Burney | 08:15:56 | -30.8 | Dark | Up | 20.1 | 218.5 | Low | 08:00:56 - 08:30:56 | 3145 |
| Susanville | 08:15:52 | -31.4 | Dark | Up | 20.3 | 219.3 | Low | 08:00:52 - 08:30:52 | 3089 |
| Greenville | 08:15:52 | -31.7 | Dark | Up | 20.6 | 219.1 | Low | 08:00:52 - 08:30:52 | 3078 |
| Gimple | 08:15:52 | -31.7 | Dark | Up | 20.6 | 219.2 | Low | 08:00:52 - 08:30:52 | 3076 |
| Quincy | 08:15:51 | -31.9 | Dark | Up | 20.8 | 219.2 | Low | 08:00:51 - 08:30:51 | 3064 |
| Portola | 08:15:50 | -32.0 | Dark | Up | 20.7 | 219.6 | Low | 08:00:50 - 08:30:50 | 3046 |
| Reno | 08:15:47 | -32.2 | Dark | Up | 20.6 | 220.2 | Low | 08:00:47 - 08:30:47 | 3015 |
| Carson City | 08:15:46 | -32.6 | Dark | Up | 20.8 | 220.3 | Low | 08:00:46 - 08:30:46 | 2990 |
| Gardnerville | 08:15:46 | -32.8 | Dark | Up | 21.0 | 220.4 | Low | 08:00:46 - 08:30:46 | 2973 |
| Yerington | 08:15:44 | -32.8 | Dark | Up | 20.7 | 220.9 | Low | 08:00:44 - 08:30:44 | 2963 |
| Hawthorne | 08:15:41 | -33.2 | Dark | Up | 20.7 | 221.4 | Low | 08:00:41 - 08:30:41 | 2920 |
| Lee Vining | 08:15:42 | -33.8 | Dark | Up | 21.4 | 221.2 | Low | 08:00:42 - 08:30:42 | 2893 |
| Tonopah | 08:15:36 | -33.6 | Dark | Up | 20.4 | 222.7 | Low | 08:00:36 - 08:30:36 | 2856 |
| Bishop | 08:15:38 | -34.3 | Dark | Up | 21.5 | 221.9 | Low | 08:00:38 - 08:30:38 | 2835 |
| Beatty | 08:15:32 | -34.7 | Dark | Up | 21.0 | 223.4 | Low | 08:00:32 - 08:30:32 | 2764 |
| CPSLO | 08:15:42 | -36.5 | Dark | Up | 24.2 | 220.6 | Low | 08:00:42 - 08:30:42 | 2742 |
| Indian Springs | 08:15:28 | -34.9 | Dark | Up | 20.6 | 224.3 | Low | 08:00:28 - 08:30:28 | 2715 |
| Dunrhomin | 08:15:06 | -29.5 | Dark | Up | 12.1 | 231.6 | Really Low | 08:00:06 - 08:30:06 | 2711 |
| Henderson | 08:15:24 | -35.3 | Dark | Up | 20.6 | 225.0 | Low | 08:00:24 - 08:30:24 | 2659 |
| Wildwood | 08:15:32 | -37.6 | Dark | Up | 24.0 | 222.7 | Low | 08:00:32 - 08:30:32 | 2606 |
| Patrick | 08:15:19 | -35.8 | Dark | Up | 20.4 | 226.1 | Low | 08:00:19 - 08:30:19 | 2586 |
| Laughlin/Bullhead City | 08:15:21 | -36.2 | Dark | Up | 21.0 | 225.6 | Low | 08:00:21 - 08:30:21 | 2586 |
| Kingman/Dolan Springs | 08:15:20 | -36.1 | Dark | Up | 20.7 | 226.0 | Low | 08:00:20 - 08:30:20 | 2575 |
| Mohave Valley | 08:15:21 | -36.4 | Dark | Up | 21.2 | 225.7 | Low | 08:00:21 - 08:30:21 | 2565 |
| Idyllwild | 08:15:25 | -37.8 | Dark | Up | 23.2 | 224.3 | Low | 08:00:25 - 08:30:25 | 2534 |
| Lake Havasu City | 08:15:19 | -36.8 | Dark | Up | 21.3 | 226.0 | Low | 08:00:19 - 08:30:19 | 2529 |
| Parker | 08:15:18 | -37.1 | Dark | Up | 21.5 | 226.1 | Low | 08:00:18 - 08:30:18 | 2502 |
| Blythe | 08:15:18 | -37.7 | Dark | Up | 22.1 | 226.0 | Low | 08:00:18 - 08:30:18 | 2471 |
| Calipatria | 08:15:20 | -38.3 | Dark | Up | 23.0 | 225.4 | Low | 08:00:20 - 08:30:20 | 2457 |
| George/Scottsdale | 08:15:09 | -37.2 | Dark | Up | 20.4 | 228.1 | Low | 08:00:09 - 08:30:09 | 2408 |
| Yuma | 08:15:16 | -38.6 | Dark | Up | 22.8 | 226.2 | Low | 08:00:16 - 08:30:16 | 2401 |
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 03LD9, (2021/07/31 08:19UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 25.16 146 Nunki 18:55:15.9 -26:17:49 2.0 11.88 113 PPM 234244 18:15:30.8 -18:39:42 6.1 0.58 122 PPM 234237 18:15:16.8 -18:59:34 7.6 0.31 123 PPM 234215 18:14:06.9 -19:11:55 9.5 0.06 123 03LD9 18:14:08.0 -19:08:14 16.2 123 Positions are for J2000
Event circumstances last updated at 2021/05/17 01:05:51 UT
Marc W. Buie, Southwest Research Institute