Event between 13GF138 and star GA0720:05392213 with event index number of 1124800
Geocentric closest approach at 2021/04/18 08:03:29 UTC
J2000 position of star is 15:05:30.5 -16:57:37
Equinox of date position of star is 15:06:41.5 -17:02:27
Stellar brightness G=16.4,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 132 degrees from the moon.
Moon is 31% illuminated.
TNO apparent brightness V=23.8
[RECON map]
TNO is 44.3 AU from the Sun
and 43.3 AU from the Earth.
The TNO is moving 23.2
km/sec on the sky relative to the star, or,
2.7 arcsec/hr.
The 1-sigma error in the time of the event is 264 seconds.
The 1-sigma cross-track error in the shadow position is
2819 km.
The sky-plane scale is
31423.1 km/arcsec.
The TNO has an absolute magnitude Hv=7.3
Diameter=206.1 km assuming a 5% albedo -- 8.9 sec chord
Diameter=84.1 km assuming a 30% albedo -- 3.6 sec chord
Dynamical classification is CLASSICAL
Star training set for 13GF138, (2021/04/18 08:03UT) Object RA Dec mag sep mel Antares 16:30:43.0 -26:28:39 0.9 21.63 153 27Bet Lib 15:18:09.4 -09:27:37 2.6 8.08 132 21Nu Lib 15:07:49.1 -16:20:17 5.2 0.75 132 PPM 229767 15:08:00.6 -16:33:56 6.6 0.57 132 PPM 229734 15:06:34.4 -17:03:59 9.8 0.04 132 13GF138 15:06:42.3 -17:02:30 16.4 133 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 12.0 km
RECON observability=1.0 and success probability=4.3%
| 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 | 08:05:30 | -28.8 | Dark | Up | 21.0 | 161.9 | Low | 07:50:30 - 08:20:30 | 5622 |
| Kelowna | 08:05:30 | -29.2 | Dark | Up | 21.4 | 161.7 | Low | 07:50:30 - 08:20:30 | 5599 |
| Peachland | 08:05:31 | -29.3 | Dark | Up | 21.4 | 161.4 | Low | 07:50:31 - 08:20:31 | 5586 |
| Summerland | 08:05:31 | -29.4 | Dark | Up | 21.6 | 161.5 | Low | 07:50:31 - 08:20:31 | 5581 |
| Penticton | 08:05:31 | -29.5 | Dark | Up | 21.6 | 161.6 | Low | 07:50:31 - 08:20:31 | 5580 |
| Oliver | 08:05:31 | -29.8 | Dark | Up | 22.0 | 161.5 | Low | 07:50:31 - 08:20:31 | 5562 |
| Anarchist Mountain Observatory | 08:05:30 | -30.0 | Dark | Up | 22.2 | 161.7 | Low | 07:50:30 - 08:20:30 | 5558 |
| Tonasket | 08:05:31 | -30.3 | Dark | Up | 22.5 | 161.6 | Low | 07:50:31 - 08:20:31 | 5540 |
| Okanogan | 08:05:32 | -30.7 | Dark | Up | 22.7 | 161.4 | Low | 07:50:32 - 08:20:32 | 5519 |
| Brewster | 08:05:32 | -30.9 | Dark | Up | 23.0 | 161.2 | Low | 07:50:32 - 08:20:32 | 5499 |
| Manson/Chelan | 08:05:33 | -31.2 | Dark | Up | 23.1 | 160.8 | Low | 07:50:33 - 08:20:33 | 5478 |
| Wenatchee | 08:05:34 | -31.6 | Dark | Up | 23.5 | 160.5 | Low | 07:50:34 - 08:20:34 | 5448 |
| Dunrhomin | 08:04:46 | -36.6 | Dark | Down | 32.7 | 175.8 | Up | 07:49:46 - 08:19:46 | 5436 |
| Victoria | 08:05:42 | -30.5 | Dark | Up | 21.7 | 157.6 | Low | 07:50:42 - 08:20:42 | 5427 |
| Ellensburg | 08:05:35 | -32.1 | Dark | Up | 23.8 | 160.2 | Low | 07:50:35 - 08:20:35 | 5419 |
| Pasco | 08:05:31 | -32.8 | Dark | Up | 24.8 | 161.6 | Low | 07:50:31 - 08:20:31 | 5416 |
| PNWRO | 08:05:30 | -33.0 | Dark | Up | 25.1 | 161.8 | Low | 07:50:30 - 08:20:30 | 5408 |
| Yakima | 08:05:35 | -32.5 | Dark | Up | 24.2 | 160.2 | Low | 07:50:35 - 08:20:35 | 5396 |
| Toppenish/White Swan | 08:05:35 | -32.7 | Dark | Up | 24.5 | 160.3 | Low | 07:50:35 - 08:20:35 | 5389 |
| Goldendale | 08:05:36 | -33.2 | Dark | Up | 24.9 | 159.8 | Low | 07:50:36 - 08:20:36 | 5346 |
| The Dalles | 08:05:38 | -33.5 | Dark | Up | 25.0 | 159.4 | Low | 07:50:38 - 08:20:38 | 5323 |
| Maupin | 08:05:38 | -33.9 | Dark | Up | 25.4 | 159.4 | Low | 07:50:38 - 08:20:38 | 5301 |
| Redmond | 08:05:38 | -34.8 | Dark | Up | 26.2 | 159.2 | Low | 07:50:38 - 08:20:38 | 5246 |
| Sisters | 08:05:39 | -34.8 | Dark | Up | 26.1 | 158.8 | Low | 07:50:39 - 08:20:39 | 5236 |
| Bend | 08:05:38 | -35.0 | Dark | Up | 26.4 | 159.0 | Low | 07:50:38 - 08:20:38 | 5229 |
| Oregon Observatory | 08:05:39 | -35.2 | Dark | Up | 26.5 | 158.8 | Low | 07:50:39 - 08:20:39 | 5215 |
| La Pine/Gilchrist | 08:05:39 | -35.4 | Dark | Up | 26.7 | 158.7 | Low | 07:50:39 - 08:20:39 | 5201 |
| North Lake | 08:05:37 | -35.8 | Dark | Up | 27.3 | 159.3 | Low | 07:50:37 - 08:20:37 | 5192 |
| Paisley | 08:05:37 | -36.4 | Dark | Up | 27.9 | 159.5 | Low | 07:50:37 - 08:20:37 | 5168 |
| Lakeview | 08:05:36 | -36.9 | Dark | Up | 28.4 | 159.6 | Low | 07:50:36 - 08:20:36 | 5142 |
| Cedarville | 08:05:36 | -37.5 | Dark | Up | 29.1 | 159.7 | Low | 07:50:36 - 08:20:36 | 5106 |
| Klamath Falls | 08:05:40 | -36.8 | Dark | Up | 28.0 | 158.2 | Low | 07:50:40 - 08:20:40 | 5103 |
| Fall River/Burney | 08:05:40 | -38.0 | Dark | Up | 29.2 | 158.3 | Low | 07:50:40 - 08:20:40 | 5039 |
| Susanville | 08:05:38 | -38.6 | Dark | Up | 30.0 | 159.0 | Low | 07:50:38 - 08:20:38 | 5020 |
| Gimple | 08:05:39 | -38.9 | Dark | Up | 30.2 | 158.7 | Up | 07:50:39 - 08:20:39 | 4996 |
| Greenville | 08:05:39 | -38.9 | Dark | Up | 30.2 | 158.6 | Up | 07:50:39 - 08:20:39 | 4993 |
| Reno | 08:05:36 | -39.5 | Dark | Up | 31.0 | 159.7 | Up | 07:50:36 - 08:20:36 | 4988 |
| Portola | 08:05:37 | -39.2 | Dark | Up | 30.6 | 159.0 | Up | 07:50:37 - 08:20:37 | 4986 |
| Quincy | 08:05:39 | -39.1 | Dark | Up | 30.3 | 158.6 | Up | 07:50:39 - 08:20:39 | 4980 |
| Yerington | 08:05:33 | -40.0 | Dark | Up | 31.7 | 160.3 | Up | 07:50:33 - 08:20:33 | 4971 |
| Tonopah | 08:05:27 | -40.8 | Dark | Down | 33.1 | 162.2 | Up | 07:50:27 - 08:20:27 | 4967 |
| Carson City | 08:05:35 | -39.8 | Dark | Up | 31.4 | 159.6 | Up | 07:50:35 - 08:20:35 | 4965 |
| Hawthorne | 08:05:31 | -40.5 | Dark | Down | 32.3 | 160.7 | Up | 07:50:31 - 08:20:31 | 4956 |
| Gardnerville | 08:05:35 | -40.1 | Dark | Up | 31.6 | 159.6 | Up | 07:50:35 - 08:20:35 | 4950 |
| Indian Springs | 08:05:22 | -42.2 | Dark | Down | 34.8 | 163.6 | Up | 07:50:22 - 08:20:22 | 4912 |
| Lee Vining | 08:05:33 | -41.0 | Dark | Down | 32.7 | 160.1 | Up | 07:50:33 - 08:20:33 | 4904 |
| Beatty | 08:05:25 | -41.9 | Dark | Down | 34.3 | 162.4 | Up | 07:50:25 - 08:20:25 | 4902 |
| Henderson | 08:05:19 | -42.6 | Dark | Down | 35.5 | 164.2 | Up | 07:50:19 - 08:20:19 | 4896 |
| Patrick | 08:05:16 | -43.1 | Dark | Down | 36.4 | 165.4 | Up | 07:50:16 - 08:20:16 | 4886 |
| Bishop | 08:05:31 | -41.6 | Dark | Down | 33.4 | 160.7 | Up | 07:50:31 - 08:20:31 | 4885 |
| Kingman/Dolan Springs | 08:05:16 | -43.3 | Dark | Down | 36.5 | 165.1 | Up | 07:50:16 - 08:20:16 | 4865 |
| Laughlin/Bullhead City | 08:05:18 | -43.4 | Dark | Down | 36.4 | 164.5 | Up | 07:50:18 - 08:20:18 | 4847 |
| Mohave Valley | 08:05:18 | -43.7 | Dark | Down | 36.7 | 164.5 | Up | 07:50:18 - 08:20:18 | 4829 |
| George/Scottsdale | 08:05:07 | -44.4 | Dark | Down | 38.4 | 167.4 | Up | 07:50:07 - 08:20:07 | 4827 |
| Lake Havasu City | 08:05:16 | -44.1 | Dark | Down | 37.1 | 164.7 | Up | 07:50:16 - 08:20:16 | 4808 |
| Parker | 08:05:17 | -44.4 | Dark | Down | 37.5 | 164.7 | Up | 07:50:17 - 08:20:17 | 4784 |
| Blythe | 08:05:17 | -45.0 | Dark | Down | 37.9 | 164.2 | Up | 07:50:17 - 08:20:17 | 4737 |
| Idyllwild | 08:05:25 | -45.1 | Dark | Down | 37.3 | 161.8 | Up | 07:50:25 - 08:20:25 | 4681 |
| Calipatria | 08:05:20 | -45.6 | Dark | Down | 38.2 | 163.0 | Up | 07:50:20 - 08:20:20 | 4672 |
| CPSLO | 08:05:39 | -43.7 | Dark | Down | 34.7 | 157.8 | Up | 07:50:39 - 08:20:39 | 4669 |
| Yuma | 08:05:17 | -45.9 | Dark | Down | 38.8 | 163.9 | Up | 07:50:17 - 08:20:17 | 4669 |
| Wildwood | 08:05:31 | -44.9 | Dark | Down | 36.5 | 159.7 | Up | 07:50:31 - 08:20:31 | 4647 |
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 13GF138, (2021/04/18 08:03UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 21.63 153 27Bet Lib 15:17:00.3 -09:22:59 2.6 8.08 132 21Nu Lib 15:06:37.6 -16:15:25 5.2 0.75 132 PPM 229767 15:06:49.0 -16:29:04 6.6 0.57 132 PPM 229734 15:05:22.6 -16:59:05 9.8 0.04 132 13GF138 15:05:30.5 -16:57:37 16.4 132 Positions are for J2000
Event circumstances last updated at 2021/01/20 20:36:15 UT
Marc W. Buie, Southwest Research Institute