Event between (169071) 01FR185 and star GA0640:07211275 with event index number of 261924
Geocentric closest approach at 2020/01/25 13:45:47 UTC
J2000 position of star is 15:52:48.1 -24:27:08
Equinox of date position of star is 15:53:54.2 -24:30:22
Stellar brightness G=16.0,
use SENSEUP=128
Star is 71 degrees from the moon.
Moon is 1% illuminated.
TNO apparent brightness V=23.3
[RECON map]
TNO is 32.2 AU from the Sun
and 32.6 AU from the Earth.
The TNO is moving 19.4
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 679 seconds.
The 1-sigma cross-track error in the shadow position is
3124 km.
The sky-plane scale is
23669.1 km/arcsec.
The TNO has an absolute magnitude Hv=8.0
Diameter=151.4 km assuming a 5% albedo -- 7.8 sec chord
Diameter=61.8 km assuming a 30% albedo -- 3.2 sec chord
Dynamical classification is 3:2E
Star training set for 169071, (2020/01/25 13:46UT) Object RA Dec mag sep mel Antares 16:30:38.5 -26:28:29 0.9 8.50 63 7Del Sco 16:01:31.4 -22:40:38 2.3 2.52 70 PPM 264828 15:55:06.1 -24:35:29 5.3 0.26 71 PPM 264863 15:56:34.8 -24:43:40 8.4 0.62 71 PPM 264828 15:55:06.1 -24:35:29 5.3 0.26 71 PPM 264815 15:54:22.9 -24:31:41 10.2 0.09 71 169071 15:54:00.2 -24:30:39 16.0 71 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 8.4 km
RECON observability=0.2 and success probability=2.8%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Niwot | 13:43:27 | -6.5 | CT | Down | 24.3 | 166.9 | Low | 13:28:27 - 13:58:27 | 430 |
| Penticton | 13:42:43 | -18.8 | Dark | Down | 12.0 | 154.3 | Really Low | 13:27:43 - 13:57:43 | 411 |
| Oroville | 13:42:43 | -18.6 | Dark | Down | 12.6 | 154.4 | Really Low | 13:27:43 - 13:57:43 | 388 |
| Tonasket | 13:42:42 | -18.6 | Dark | Down | 12.8 | 154.4 | Really Low | 13:27:42 - 13:57:42 | 378 |
| Okanogan | 13:42:42 | -18.6 | Dark | Down | 13.0 | 154.2 | Really Low | 13:27:42 - 13:57:42 | 357 |
| Brewster | 13:42:41 | -18.7 | Dark | Down | 13.2 | 154.0 | Really Low | 13:27:41 - 13:57:41 | 338 |
| Manson/Chelan | 13:42:39 | -19.0 | Dark | Down | 13.3 | 153.6 | Really Low | 13:27:39 - 13:57:39 | 315 |
| Entiat | 13:42:39 | -19.0 | Dark | Down | 13.5 | 153.5 | Really Low | 13:27:39 - 13:57:39 | 302 |
| Wenatchee | 13:42:38 | -19.0 | Dark | Down | 13.7 | 153.4 | Really Low | 13:27:38 - 13:57:38 | 287 |
| Pasco | 13:42:40 | -18.0 | Dark | Down | 15.1 | 154.4 | Really Low | 13:27:40 - 13:57:40 | 271 |
| PNWRO | 13:42:41 | -17.8 | AT | Down | 15.4 | 154.5 | Really Low | 13:27:41 - 13:57:41 | 266 |
| Ellensburg | 13:42:37 | -19.1 | Dark | Down | 14.0 | 153.2 | Really Low | 13:27:37 - 13:57:37 | 259 |
| George/Umatilla | 13:42:39 | -18.1 | Dark | Down | 15.3 | 154.1 | Really Low | 13:27:39 - 13:57:39 | 247 |
| Yakima | 13:42:36 | -19.1 | Dark | Down | 14.3 | 153.1 | Really Low | 13:27:36 - 13:57:36 | 238 |
| Toppenish/White Swan | 13:42:36 | -18.9 | Dark | Down | 14.6 | 153.2 | Really Low | 13:27:36 - 13:57:36 | 233 |
| Goldendale | 13:42:34 | -19.1 | Dark | Down | 14.9 | 152.8 | Really Low | 13:27:34 - 13:57:34 | 190 |
| The Dalles | 13:42:33 | -19.4 | Dark | Down | 15.0 | 152.4 | Really Low | 13:27:33 - 13:57:33 | 166 |
| Maupin | 13:42:33 | -19.2 | Dark | Down | 15.4 | 152.5 | Really Low | 13:27:33 - 13:57:33 | 148 |
| Madras/Culver | 13:42:32 | -19.2 | Dark | Down | 15.9 | 152.4 | Really Low | 13:27:32 - 13:57:32 | 117 |
| Redmond | 13:42:31 | -19.2 | Dark | Down | 16.2 | 152.3 | Really Low | 13:27:31 - 13:57:31 | 97 |
| Sisters | 13:42:30 | -19.5 | Dark | Down | 16.0 | 151.9 | Really Low | 13:27:30 - 13:57:30 | 83 |
| Bend | 13:42:30 | -19.2 | Dark | Down | 16.3 | 152.1 | Really Low | 13:27:30 - 13:57:30 | 80 |
| Oregon Observatory | 13:42:30 | -19.3 | Dark | Down | 16.4 | 152.0 | Really Low | 13:27:30 - 13:57:30 | 66 |
| La Pine/Gilchrist | 13:42:30 | -19.3 | Dark | Down | 16.6 | 151.9 | Really Low | 13:27:30 - 13:57:30 | 52 |
| North Lake | 13:42:31 | -18.8 | Dark | Down | 17.2 | 152.4 | Really Low | 13:27:31 - 13:57:31 | 50 |
| Paisley | 13:42:31 | -18.5 | Dark | Down | 17.8 | 152.6 | Really Low | 13:27:31 - 13:57:31 | 33 |
| Lakeview | 13:42:32 | -18.3 | Dark | Down | 18.3 | 152.7 | Really Low | 13:27:32 - 13:57:32 | 13 |
| Cedarville | 13:42:31 | -18.0 | Dark | Down | 19.0 | 152.8 | Really Low | 13:27:31 - 13:57:31 | -19 |
| Chiloquin | 13:42:27 | -19.4 | Dark | Down | 17.5 | 151.4 | Really Low | 13:27:27 - 13:57:27 | -23 |
| Klamath Falls | 13:42:27 | -19.3 | Dark | Down | 17.8 | 151.4 | Really Low | 13:27:27 - 13:57:27 | -39 |
| Tulelake | 13:42:27 | -19.1 | Dark | Down | 18.1 | 151.6 | Really Low | 13:27:27 - 13:57:27 | -43 |
| Fall River/Burney | 13:42:27 | -18.9 | Dark | Down | 19.0 | 151.6 | Really Low | 13:27:27 - 13:57:27 | -93 |
| Susanville | 13:42:29 | -18.2 | Dark | Down | 19.8 | 152.1 | Really Low | 13:27:29 - 13:57:29 | -102 |
| Tonopah | 13:42:39 | -15.1 | AT | Down | 23.1 | 154.9 | Low | 13:27:39 - 13:57:39 | -110 |
| Reno | 13:42:31 | -17.4 | AT | Down | 20.9 | 152.7 | Low | 13:27:31 - 13:57:31 | -121 |
| Gimple | 13:42:28 | -18.3 | Dark | Down | 19.9 | 151.9 | Really Low | 13:27:28 - 13:57:28 | -126 |
| Yerington | 13:42:33 | -16.8 | AT | Down | 21.6 | 153.2 | Low | 13:27:33 - 13:57:33 | -129 |
| Greenville | 13:42:27 | -18.4 | Dark | Down | 19.9 | 151.8 | Really Low | 13:27:27 - 13:57:27 | -129 |
| Portola | 13:42:29 | -18.0 | AT | Down | 20.4 | 152.2 | Low | 13:27:29 - 13:57:29 | -130 |
| DCO | 13:42:53 | -11.2 | CT | Down | 27.1 | 158.2 | Low | 13:27:53 - 13:57:53 | -136 |
| Hawthorne | 13:42:34 | -16.3 | AT | Down | 22.2 | 153.6 | Low | 13:27:34 - 13:57:34 | -137 |
| Quincy | 13:42:27 | -18.3 | Dark | Down | 20.1 | 151.8 | Low | 13:27:27 - 13:57:27 | -141 |
| Indian Springs | 13:42:44 | -13.6 | AT | Down | 25.0 | 156.0 | Low | 13:27:44 - 13:57:44 | -142 |
| Carson City | 13:42:30 | -17.3 | AT | Down | 21.2 | 152.7 | Low | 13:27:30 - 13:57:30 | -142 |
| Patrick | 13:42:51 | -11.8 | CT | Down | 26.6 | 157.6 | Low | 13:27:51 - 13:57:51 | -144 |
| Henderson | 13:42:47 | -12.9 | AT | Down | 25.7 | 156.6 | Low | 13:27:47 - 13:57:47 | -148 |
| Gardnerville | 13:42:30 | -17.2 | AT | Down | 21.4 | 152.7 | Low | 13:27:30 - 13:57:30 | -155 |
| Beatty | 13:42:40 | -14.5 | AT | Down | 24.3 | 155.1 | Low | 13:27:40 - 13:57:40 | -163 |
| Kingman/Dolan Springs | 13:42:50 | -11.9 | CT | Down | 26.8 | 157.3 | Low | 13:27:50 - 13:57:50 | -165 |
| Searchlight/Boulder City | 13:42:47 | -12.7 | AT | Down | 26.2 | 156.6 | Low | 13:27:47 - 13:57:47 | -181 |
| Laughlin/Bullhead City | 13:42:48 | -12.3 | AT | Down | 26.6 | 156.8 | Low | 13:27:48 - 13:57:48 | -186 |
| Lee Vining | 13:42:32 | -16.6 | AT | Down | 22.5 | 153.1 | Low | 13:27:32 - 13:57:32 | -190 |
| Bishop | 13:42:34 | -15.9 | AT | Down | 23.3 | 153.6 | Low | 13:27:34 - 13:57:34 | -199 |
| Mohave Valley | 13:42:48 | -12.3 | AT | Down | 26.9 | 156.8 | Low | 13:27:48 - 13:57:48 | -203 |
| Lake Havasu City | 13:42:48 | -11.9 | CT | Down | 27.3 | 156.9 | Low | 13:27:48 - 13:57:48 | -219 |
| Lone Pine | 13:42:35 | -15.5 | AT | Down | 24.1 | 153.8 | Low | 13:27:35 - 13:57:35 | -233 |
| Parker | 13:42:48 | -11.8 | CT | Down | 27.6 | 156.9 | Low | 13:27:48 - 13:57:48 | -240 |
| Blythe | 13:42:47 | -11.9 | CT | Down | 28.0 | 156.5 | Low | 13:27:47 - 13:57:47 | -286 |
| Yuma | 13:42:47 | -11.7 | CT | Down | 28.9 | 156.3 | Low | 13:27:47 - 13:57:47 | -348 |
| Calipatria | 13:42:43 | -12.6 | AT | Down | 28.2 | 155.5 | Low | 13:27:43 - 13:57:43 | -356 |
| Idyllwild | 13:42:39 | -13.7 | AT | Down | 27.2 | 154.5 | Low | 13:27:39 - 13:57:39 | -363 |
| Wildwood | 13:42:31 | -15.3 | AT | Down | 26.1 | 152.8 | Low | 13:27:31 - 13:57:31 | -416 |
| CPSLO | 13:42:25 | -17.3 | AT | Down | 24.3 | 151.1 | Low | 13:27:25 - 13:57:25 | -421 |
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 169071, (2020/01/25 13:46UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 8.50 63 7Del Sco 16:00:20.0 -22:37:18 2.3 2.52 70 PPM 264828 15:53:53.9 -24:32:00 5.3 0.26 71 PPM 264863 15:55:22.5 -24:40:13 8.4 0.62 71 PPM 264828 15:53:53.9 -24:32:00 5.3 0.26 71 PPM 264815 15:53:10.8 -24:28:10 10.2 0.09 71 169071 15:52:48.1 -24:27:08 16.0 71 Positions are for J2000
Event circumstances last updated at 2018/05/30 18:23:48 UT
Marc W. Buie, Southwest Research Institute