Event between (471172) 10JC80 and star GA0660:07451072 with event index number of 328023
Geocentric closest approach at 2020/04/29 10:38:00 UTC
J2000 position of star is 16:30:26.0 -22:49:46
Equinox of date position of star is 16:31:37.1 -22:52:17
Stellar brightness G=16.4,
use SENSEUP=128
Star is 137 degrees from the moon.
Moon is 35% illuminated.
TNO apparent brightness V=21.0
[RECON map]
TNO is 32.0 AU from the Sun
and 31.2 AU from the Earth.
The TNO is moving 19.1
km/sec on the sky relative to the star, or,
3.0 arcsec/hr.
The 1-sigma error in the time of the event is 918 seconds.
The 1-sigma cross-track error in the shadow position is
4019 km.
The sky-plane scale is
22593.4 km/arcsec.
The TNO has an absolute magnitude Hv=5.9
Diameter=398.1 km assuming a 5% albedo -- 20.8 sec chord
Diameter=162.5 km assuming a 30% albedo -- 8.5 sec chord
Dynamical classification is 5:2EEE
Star training set for 471172, (2020/04/29 10:38UT) Object RA Dec mag sep mel Antares 16:30:39.4 -26:28:31 0.9 3.61 138 23Tau Sco 16:37:09.1 -28:15:23 2.8 5.52 139 22 Sco 16:31:26.8 -25:09:30 4.5 2.29 138 PPM 265625 16:32:50.4 -22:50:37 8.3 0.28 138 PPM 265584 16:30:56.3 -22:53:26 10.0 0.16 137 471172 16:31:39.1 -22:52:21 16.4 138 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
1.0 sigma about the mid-time.
The median site spacing is 11.9 km
RECON observability=0.8 and success probability=0.7%
| 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 | 10:37:59 | -15.8 | AT | Down | 16.3 | 190.0 | Really Low | 10:22:59 - 10:52:59 | 11484 |
| Kelowna | 10:38:00 | -16.2 | AT | Down | 16.7 | 189.9 | Really Low | 10:23:00 - 10:53:00 | 11472 |
| Summerland | 10:38:00 | -16.5 | AT | Down | 17.0 | 189.7 | Really Low | 10:23:00 - 10:53:00 | 11463 |
| Penticton | 10:37:58 | -16.5 | AT | Down | 17.1 | 189.8 | Really Low | 10:22:58 - 10:52:58 | 11461 |
| Oliver | 10:37:59 | -16.8 | AT | Down | 17.4 | 189.8 | Really Low | 10:22:59 - 10:52:59 | 11450 |
| Anarchist Mountain Observatory | 10:37:58 | -16.8 | AT | Down | 17.6 | 190.0 | Really Low | 10:22:58 - 10:52:58 | 11445 |
| Tonasket | 10:37:58 | -17.1 | AT | Down | 17.9 | 190.0 | Really Low | 10:22:58 - 10:52:58 | 11434 |
| Okanogan | 10:37:59 | -17.4 | AT | Down | 18.2 | 189.8 | Really Low | 10:22:59 - 10:52:59 | 11422 |
| Brewster | 10:37:59 | -17.7 | AT | Down | 18.5 | 189.7 | Really Low | 10:22:59 - 10:52:59 | 11412 |
| Victoria | 10:38:13 | -18.9 | Dark | Down | 18.4 | 186.2 | Really Low | 10:23:13 - 10:53:13 | 11409 |
| Manson/Chelan | 10:38:00 | -18.0 | AT | Down | 18.8 | 189.3 | Really Low | 10:23:00 - 10:53:00 | 11403 |
| Entiat | 10:37:59 | -18.2 | Dark | Down | 19.0 | 189.3 | Really Low | 10:22:59 - 10:52:59 | 11395 |
| Wenatchee | 10:38:00 | -18.4 | Dark | Down | 19.2 | 189.2 | Really Low | 10:23:00 - 10:53:00 | 11385 |
| Ellensburg | 10:38:01 | -18.8 | Dark | Down | 19.7 | 189.0 | Really Low | 10:23:01 - 10:53:01 | 11370 |
| Yakima | 10:38:01 | -19.1 | Dark | Down | 20.1 | 189.0 | Low | 10:23:01 - 10:53:01 | 11354 |
| Pasco | 10:37:54 | -18.8 | Dark | Down | 20.3 | 190.4 | Low | 10:22:54 - 10:52:54 | 11347 |
| Toppenish/White Swan | 10:38:00 | -19.2 | Dark | Down | 20.3 | 189.2 | Low | 10:23:00 - 10:53:00 | 11347 |
| PNWRO | 10:37:54 | -18.8 | Dark | Down | 20.5 | 190.6 | Low | 10:22:54 - 10:52:54 | 11339 |
| Goldendale | 10:38:01 | -19.8 | Dark | Down | 20.9 | 188.8 | Low | 10:23:01 - 10:53:01 | 11324 |
| The Dalles | 10:38:03 | -20.2 | Dark | Down | 21.1 | 188.5 | Low | 10:23:03 - 10:53:03 | 11313 |
| Maupin | 10:38:02 | -20.5 | Dark | Down | 21.5 | 188.6 | Low | 10:23:02 - 10:53:02 | 11297 |
| Redmond | 10:38:00 | -21.2 | Dark | Down | 22.4 | 188.5 | Low | 10:23:00 - 10:53:00 | 11260 |
| Sisters | 10:38:03 | -21.4 | Dark | Down | 22.5 | 188.2 | Low | 10:23:03 - 10:53:03 | 11259 |
| Bend | 10:38:01 | -21.4 | Dark | Down | 22.7 | 188.4 | Low | 10:23:01 - 10:53:01 | 11250 |
| Oregon Observatory | 10:38:01 | -21.6 | Dark | Down | 22.9 | 188.3 | Low | 10:23:01 - 10:53:01 | 11242 |
| La Pine/Gilchrist | 10:38:01 | -21.8 | Dark | Down | 23.1 | 188.3 | Low | 10:23:01 - 10:53:01 | 11233 |
| North Lake | 10:37:58 | -21.8 | Dark | Down | 23.4 | 188.9 | Low | 10:22:58 - 10:52:58 | 11218 |
| Paisley | 10:37:57 | -22.1 | Dark | Down | 23.9 | 189.3 | Low | 10:22:57 - 10:52:57 | 11195 |
| Lakeview | 10:37:55 | -22.4 | Dark | Down | 24.4 | 189.5 | Low | 10:22:55 - 10:52:55 | 11173 |
| Klamath Falls | 10:38:04 | -23.0 | Dark | Down | 24.5 | 188.1 | Low | 10:23:04 - 10:53:04 | 11168 |
| Cedarville | 10:37:55 | -22.8 | Dark | Down | 25.0 | 189.7 | Low | 10:22:55 - 10:52:55 | 11144 |
| Fall River/Burney | 10:37:58 | -23.7 | Dark | Down | 25.7 | 188.5 | Low | 10:22:58 - 10:52:58 | 11114 |
| Susanville | 10:37:57 | -23.8 | Dark | Down | 26.2 | 189.3 | Low | 10:22:57 - 10:52:57 | 11088 |
| Niwot | 10:36:51 | -15.3 | AT | Down | 23.1 | 204.3 | Low | 10:21:51 - 10:51:51 | 11082 |
| SwRI | 10:36:51 | -15.4 | AT | Down | 23.2 | 204.3 | Low | 10:21:51 - 10:51:51 | 11076 |
| Gimple | 10:37:56 | -24.1 | Dark | Down | 26.5 | 189.1 | Low | 10:22:56 - 10:52:56 | 11073 |
| Greenville | 10:37:56 | -24.2 | Dark | Down | 26.5 | 189.0 | Low | 10:22:56 - 10:52:56 | 11073 |
| Quincy | 10:37:56 | -24.3 | Dark | Down | 26.7 | 189.1 | Low | 10:22:56 - 10:52:56 | 11063 |
| Portola | 10:37:53 | -24.2 | Dark | Down | 26.8 | 189.5 | Low | 10:22:53 - 10:52:53 | 11060 |
| Reno | 10:37:50 | -24.0 | Dark | Down | 26.9 | 190.2 | Low | 10:22:50 - 10:52:50 | 11049 |
| Carson City | 10:37:50 | -24.3 | Dark | Down | 27.3 | 190.3 | Low | 10:22:50 - 10:52:50 | 11031 |
| Yerington | 10:37:49 | -24.1 | Dark | Down | 27.4 | 190.9 | Low | 10:22:49 - 10:52:49 | 11024 |
| Gardnerville | 10:37:50 | -24.4 | Dark | Down | 27.5 | 190.3 | Low | 10:22:50 - 10:52:50 | 11019 |
| Hawthorne | 10:37:46 | -24.1 | Dark | Down | 27.8 | 191.5 | Low | 10:22:46 - 10:52:46 | 11002 |
| Tonopah | 10:37:39 | -23.7 | Dark | Down | 28.0 | 193.0 | Low | 10:22:39 - 10:52:39 | 10983 |
| Lee Vining | 10:37:46 | -24.8 | Dark | Down | 28.4 | 191.1 | Low | 10:22:46 - 10:52:46 | 10972 |
| Bishop | 10:37:43 | -24.8 | Dark | Down | 28.9 | 191.9 | Low | 10:22:43 - 10:52:43 | 10942 |
| Beatty | 10:37:35 | -24.2 | Dark | Down | 29.0 | 193.6 | Low | 10:22:35 - 10:52:35 | 10922 |
| Indian Springs | 10:37:30 | -23.8 | Dark | Down | 29.2 | 194.7 | Low | 10:22:30 - 10:52:30 | 10907 |
| Henderson | 10:37:25 | -23.8 | Dark | Down | 29.5 | 195.5 | Low | 10:22:25 - 10:52:25 | 10879 |
| Searchlight/Boulder City | 10:37:25 | -24.1 | Dark | Down | 30.1 | 195.7 | Up | 10:22:25 - 10:52:25 | 10847 |
| Patrick | 10:37:21 | -23.5 | Dark | Down | 29.9 | 196.7 | Low | 10:22:21 - 10:52:21 | 10845 |
| Kingman/Dolan Springs | 10:37:20 | -23.8 | Dark | Down | 30.1 | 196.6 | Up | 10:22:20 - 10:52:20 | 10832 |
| Laughlin/Bullhead City | 10:37:23 | -24.1 | Dark | Down | 30.3 | 196.1 | Up | 10:22:23 - 10:52:23 | 10830 |
| DCO | 10:37:17 | -23.3 | Dark | Down | 30.0 | 197.5 | Up | 10:22:17 - 10:52:17 | 10829 |
| CPSLO | 10:37:51 | -27.6 | Dark | Down | 31.2 | 189.8 | Up | 10:22:51 - 10:52:51 | 10817 |
| Mohave Valley | 10:37:22 | -24.3 | Dark | Down | 30.5 | 196.1 | Up | 10:22:22 - 10:52:22 | 10814 |
| Lake Havasu City | 10:37:21 | -24.4 | Dark | Down | 30.9 | 196.4 | Up | 10:22:21 - 10:52:21 | 10791 |
| Parker | 10:37:21 | -24.6 | Dark | Down | 31.2 | 196.5 | Up | 10:22:21 - 10:52:21 | 10771 |
| Wildwood | 10:37:40 | -27.3 | Dark | Down | 32.1 | 192.0 | Up | 10:22:40 - 10:52:40 | 10756 |
| George/Scottsdale | 10:37:08 | -23.4 | Dark | Down | 31.0 | 199.1 | Up | 10:22:08 - 10:52:08 | 10747 |
| Idyllwild | 10:37:32 | -26.4 | Dark | Down | 32.1 | 194.1 | Up | 10:22:32 - 10:52:32 | 10742 |
| Blythe | 10:37:21 | -25.2 | Dark | Down | 31.8 | 196.3 | Up | 10:22:21 - 10:52:21 | 10739 |
| Calipatria | 10:37:26 | -26.1 | Dark | Down | 32.5 | 195.4 | Up | 10:22:26 - 10:52:26 | 10707 |
| Yuma | 10:37:21 | -25.8 | Dark | Down | 32.7 | 196.4 | Up | 10:22:21 - 10:52:21 | 10683 |
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 471172, (2020/04/29 10:38UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 3.61 138 23Tau Sco 16:35:52.9 -28:12:58 2.8 5.52 139 22 Sco 16:30:12.5 -25:06:55 4.5 2.29 138 PPM 265625 16:31:37.3 -22:48:05 8.3 0.28 138 PPM 265584 16:29:43.3 -22:50:50 10.0 0.16 137 471172 16:30:26.0 -22:49:46 16.4 137 Positions are for J2000
Event circumstances last updated at 2019/10/15 22:18:01 UT
Marc W. Buie, Southwest Research Institute