Event between 11MM4 and star GA1620:01539164 with event index number of 212089
Geocentric closest approach at 2019/09/18 09:41:13 UTC
J2000 position of star is 11:33:26.8 +72:15:06
Equinox of date position of star is 11:34:35.7 +72:08:39
Stellar brightness G=16.1,
use SENSEUP=128
Star is 91 degrees from the moon.
Moon is 84% illuminated.
TNO apparent brightness V=22.7
[RECON map]
TNO is 19.7 AU from the Sun
and 20.0 AU from the Earth.
The TNO is moving 21.6
km/sec on the sky relative to the star, or,
5.4 arcsec/hr.
The 1-sigma error in the time of the event is 391 seconds.
The 1-sigma cross-track error in the shadow position is
1826 km.
The sky-plane scale is
14482.7 km/arcsec.
The TNO has an absolute magnitude Hv=9.5
Diameter=77.3 km assuming a 5% albedo -- 3.6 sec chord
Diameter=31.5 km assuming a 30% albedo -- 1.5 sec chord
Dynamical classification is CENTAURR
Star training set for 11MM4, (2019/09/18 09:41UT) Object RA Dec mag sep mel Vega 18:37:36.4 +38:48:11 0.0 57.89 106 Dubhe 11:04:55.7 +61:38:38 1.8 10.88 96 1Lam Dra 11:32:33.2 +69:13:19 3.8 2.93 93 PPM 007996 11:45:48.7 +73:02:14 8.2 1.23 91 PPM 007957 11:36:39.7 +71:57:18 10.0 0.25 91 PPM 007952 11:34:35.0 +72:21:24 10.5 0.21 91 11MM4 11:34:36.7 +72:08:33 16.1 91 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
2.3 sigma about the mid-time.
The median site spacing is 5.0 km
RECON observability=0.9 and success probability=13.8%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| CPSLO | 09:38:37 | -45.8 | Dark | Up | 19.3 | 8.6 | Really Low | 09:23:37 - 09:53:37 | 1056 |
| Wildwood | 09:38:29 | -45.7 | Dark | Up | 18.3 | 9.1 | Really Low | 09:23:29 - 09:53:29 | 967 |
| Quincy | 09:38:46 | -42.2 | Dark | Up | 23.8 | 8.8 | Low | 09:23:46 - 09:53:46 | 957 |
| Greenville | 09:38:46 | -42.1 | Dark | Up | 24.0 | 8.8 | Low | 09:23:46 - 09:53:46 | 952 |
| Gimple | 09:38:46 | -42.0 | Dark | Up | 24.0 | 8.9 | Low | 09:23:46 - 09:53:46 | 947 |
| Fall River/Burney | 09:38:49 | -41.5 | Dark | Up | 24.9 | 8.8 | Low | 09:23:49 - 09:53:49 | 947 |
| Portola | 09:38:44 | -42.1 | Dark | Up | 23.8 | 9.0 | Low | 09:23:44 - 09:53:44 | 937 |
| Susanville | 09:38:46 | -41.7 | Dark | Up | 24.3 | 8.9 | Low | 09:23:46 - 09:53:46 | 929 |
| Klamath Falls | 09:38:52 | -40.7 | Dark | Up | 26.0 | 8.7 | Low | 09:23:52 - 09:53:52 | 928 |
| Gardnerville | 09:38:40 | -42.5 | Dark | Up | 23.0 | 9.1 | Low | 09:23:40 - 09:53:40 | 923 |
| Tulelake | 09:38:51 | -40.8 | Dark | Up | 25.8 | 8.8 | Low | 09:23:51 - 09:53:51 | 922 |
| Chiloquin | 09:38:53 | -40.4 | Dark | Up | 26.3 | 8.7 | Low | 09:23:53 - 09:53:53 | 921 |
| Carson City | 09:38:41 | -42.3 | Dark | Up | 23.2 | 9.1 | Low | 09:23:41 - 09:53:41 | 919 |
| Lee Vining | 09:38:37 | -43.0 | Dark | Up | 22.1 | 9.2 | Low | 09:23:37 - 09:53:37 | 915 |
| Reno | 09:38:42 | -42.0 | Dark | Up | 23.6 | 9.1 | Low | 09:23:42 - 09:53:42 | 911 |
| Yerington | 09:38:39 | -42.2 | Dark | Up | 23.1 | 9.3 | Low | 09:23:39 - 09:53:39 | 891 |
| Bishop | 09:38:33 | -43.1 | Dark | Up | 21.6 | 9.4 | Low | 09:23:33 - 09:53:33 | 890 |
| Lone Pine | 09:38:31 | -43.5 | Dark | Up | 20.9 | 9.5 | Low | 09:23:31 - 09:53:31 | 888 |
| Hawthorne | 09:38:36 | -42.3 | Dark | Up | 22.7 | 9.4 | Low | 09:23:36 - 09:53:36 | 875 |
| Cedarville | 09:38:47 | -40.6 | Dark | Up | 25.5 | 9.2 | Low | 09:23:47 - 09:53:47 | 872 |
| La Pine/Gilchrist | 09:38:54 | -39.3 | Dark | Up | 27.5 | 8.9 | Low | 09:23:54 - 09:53:54 | 867 |
| Idyllwild | 09:38:22 | -44.9 | Dark | Up | 18.2 | 9.7 | Really Low | 09:23:22 - 09:53:22 | 865 |
| Lakeview | 09:38:48 | -40.1 | Dark | Up | 26.1 | 9.2 | Low | 09:23:48 - 09:53:48 | 861 |
| Oregon Observatory | 09:38:54 | -39.1 | Dark | Up | 27.7 | 9.0 | Low | 09:23:54 - 09:53:54 | 857 |
| Paisley | 09:38:50 | -39.8 | Dark | Up | 26.6 | 9.2 | Low | 09:23:50 - 09:53:50 | 854 |
| North Lake | 09:38:51 | -39.5 | Dark | Up | 27.1 | 9.1 | Low | 09:23:51 - 09:53:51 | 854 |
| Sisters | 09:38:55 | -38.8 | Dark | Up | 28.1 | 9.0 | Low | 09:23:55 - 09:53:55 | 849 |
| Bend | 09:38:54 | -38.9 | Dark | Up | 27.9 | 9.0 | Low | 09:23:54 - 09:53:54 | 845 |
| Redmond | 09:38:54 | -38.7 | Dark | Up | 28.1 | 9.1 | Low | 09:23:54 - 09:53:54 | 832 |
| Madras/Culver | 09:38:55 | -38.4 | Dark | Up | 28.4 | 9.1 | Low | 09:23:55 - 09:53:55 | 817 |
| Tonopah | 09:38:31 | -42.0 | Dark | Up | 22.4 | 9.8 | Low | 09:23:31 - 09:53:31 | 809 |
| Beatty | 09:38:27 | -42.6 | Dark | Up | 21.3 | 9.9 | Low | 09:23:27 - 09:53:27 | 809 |
| Calipatria | 09:38:18 | -44.7 | Dark | Up | 17.8 | 10.0 | Really Low | 09:23:18 - 09:53:18 | 803 |
| Maupin | 09:38:56 | -37.9 | Dark | Up | 29.0 | 9.2 | Low | 09:23:56 - 09:53:56 | 795 |
| The Dalles | 09:38:57 | -37.6 | Dark | Up | 29.4 | 9.2 | Low | 09:23:57 - 09:53:57 | 785 |
| Goldendale | 09:38:57 | -37.3 | Dark | Up | 29.7 | 9.3 | Low | 09:23:57 - 09:53:57 | 760 |
| Yuma | 09:38:14 | -44.4 | Dark | Up | 17.5 | 10.2 | Really Low | 09:23:14 - 09:53:14 | 755 |
| Indian Springs | 09:38:23 | -42.3 | Dark | Up | 21.2 | 10.1 | Low | 09:23:23 - 09:53:23 | 754 |
| Blythe | 09:38:15 | -43.8 | Dark | Up | 18.4 | 10.3 | Really Low | 09:23:15 - 09:53:15 | 739 |
| Searchlight/Boulder City | 09:38:19 | -42.7 | Dark | Up | 20.2 | 10.3 | Low | 09:23:19 - 09:53:19 | 730 |
| Henderson | 09:38:21 | -42.3 | Dark | Up | 20.7 | 10.3 | Low | 09:23:21 - 09:53:21 | 723 |
| Toppenish/White Swan | 09:38:57 | -36.6 | Dark | Up | 30.2 | 9.5 | Up | 09:23:57 - 09:53:57 | 720 |
| Yakima | 09:38:58 | -36.5 | Dark | Up | 30.4 | 9.5 | Up | 09:23:58 - 09:53:58 | 720 |
| Mohave Valley | 09:38:18 | -42.9 | Dark | Up | 19.7 | 10.3 | Really Low | 09:23:18 - 09:53:18 | 718 |
| Laughlin/Bullhead City | 09:38:18 | -42.7 | Dark | Up | 19.9 | 10.4 | Really Low | 09:23:18 - 09:53:18 | 714 |
| Parker | 09:38:15 | -43.2 | Dark | Up | 19.0 | 10.4 | Really Low | 09:23:15 - 09:53:15 | 713 |
| Lake Havasu City | 09:38:16 | -43.0 | Dark | Up | 19.3 | 10.4 | Really Low | 09:23:16 - 09:53:16 | 710 |
| Ellensburg | 09:38:58 | -36.2 | Dark | Up | 30.8 | 9.6 | Up | 09:23:58 - 09:53:58 | 704 |
| George/Umatilla | 09:38:53 | -36.6 | Dark | Up | 29.9 | 9.8 | Low | 09:23:53 - 09:53:53 | 688 |
| Kingman/Dolan Springs | 09:38:17 | -42.4 | Dark | Up | 20.0 | 10.5 | Low | 09:23:17 - 09:53:17 | 683 |
| Wenatchee | 09:38:58 | -35.7 | Dark | Up | 31.3 | 9.7 | Up | 09:23:58 - 09:53:58 | 678 |
| Patrick | 09:38:16 | -42.1 | Dark | Up | 20.3 | 10.6 | Low | 09:23:16 - 09:53:16 | 668 |
| Pasco | 09:38:52 | -36.3 | Dark | Up | 30.3 | 9.9 | Up | 09:23:52 - 09:53:52 | 666 |
| PNWRO | 09:38:51 | -36.4 | Dark | Up | 30.1 | 10.0 | Up | 09:23:51 - 09:53:51 | 664 |
| Entiat | 09:38:59 | -35.5 | Dark | Up | 31.5 | 9.7 | Up | 09:23:59 - 09:53:59 | 664 |
| Manson/Chelan | 09:38:59 | -35.3 | Dark | Up | 31.8 | 9.8 | Up | 09:23:59 - 09:53:59 | 652 |
| DCO | 09:38:13 | -41.9 | Dark | Up | 20.1 | 10.7 | Low | 09:23:13 - 09:53:13 | 629 |
| Brewster | 09:38:58 | -35.0 | Dark | Up | 32.0 | 9.9 | Up | 09:23:58 - 09:53:58 | 628 |
| Okanogan | 09:38:59 | -34.7 | Dark | Up | 32.3 | 10.0 | Up | 09:23:59 - 09:53:59 | 608 |
| Tonasket | 09:38:59 | -34.3 | Dark | Up | 32.7 | 10.1 | Up | 09:23:59 - 09:53:59 | 588 |
| Oroville | 09:38:59 | -34.1 | Dark | Up | 32.9 | 10.1 | Up | 09:23:59 - 09:53:59 | 579 |
| Oliver | 09:39:00 | -34.0 | Dark | Up | 33.1 | 10.1 | Up | 09:24:00 - 09:54:00 | 574 |
| Anarchist Mountain Observatory | 09:38:59 | -34.0 | Dark | Up | 33.0 | 10.2 | Up | 09:23:59 - 09:53:59 | 573 |
| Okanagan Falls | 09:39:00 | -33.8 | Dark | Up | 33.3 | 10.1 | Up | 09:24:00 - 09:54:00 | 568 |
| Summerland | 09:39:01 | -33.7 | Dark | Up | 33.5 | 10.1 | Up | 09:24:01 - 09:54:01 | 562 |
| Penticton | 09:39:01 | -33.7 | Dark | Up | 33.5 | 10.2 | Up | 09:24:01 - 09:54:01 | 560 |
| Kelowna | 09:39:01 | -33.3 | Dark | Up | 33.8 | 10.3 | Up | 09:24:01 - 09:54:01 | 537 |
| SwRI | 09:38:02 | -34.0 | Dark | Up | 26.2 | 13.4 | Low | 09:23:02 - 09:53:02 | 52 |
| Niwot | 09:38:02 | -33.9 | Dark | Up | 26.3 | 13.4 | Low | 09:23:02 - 09:53:02 | 44 |
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 11MM4, (2019/09/18 09:41UT) Object RA Dec mag sep mel Vega 18:36:56.7 +38:47:07 0.0 57.89 106 Dubhe 11:03:43.3 +61:45:02 1.8 10.88 96 1Lam Dra 11:31:24.1 +69:19:52 3.8 2.93 93 PPM 007996 11:44:42.5 +73:08:49 8.2 1.23 91 PPM 007957 11:35:30.6 +72:03:51 10.0 0.25 91 PPM 007952 11:33:25.0 +72:27:57 10.5 0.21 91 11MM4 11:33:26.8 +72:15:06 16.1 91 Positions are for J2000
Event circumstances last updated at 2019/06/07 22:40:22 UT
Marc W. Buie, Southwest Research Institute