Event between 12UL177 and star GA1200:00413671 with event index number of 212279
Geocentric closest approach at 2019/09/24 04:30:33 UTC
J2000 position of star is 02:31:42.8 +30:33:05
Equinox of date position of star is 02:32:49.5 +30:38:01
Stellar brightness G=14.6,
use SENSEUP=128
Star is 72 degrees from the moon.
Moon is 28% illuminated.
TNO apparent brightness V=23.2
[RECON map]
TNO is 36.1 AU from the Sun
and 35.4 AU from the Earth.
The TNO is moving 16.8
km/sec on the sky relative to the star, or,
2.4 arcsec/hr.
The 1-sigma error in the time of the event is 421 seconds.
The 1-sigma cross-track error in the shadow position is
1663 km.
The sky-plane scale is
25669.6 km/arcsec.
The TNO has an absolute magnitude Hv=7.5
Diameter=193.2 km assuming a 5% albedo -- 11.5 sec chord
Diameter=78.9 km assuming a 30% albedo -- 4.7 sec chord
Dynamical classification is SCATEXTD
Star training set for 12UL177, (2019/09/24 04:31UT) Object RA Dec mag sep mel Aldebaran 04:37:03.3 +16:32:51 0.8 31.59 48 Hamal 02:08:17.4 +23:33:17 2.0 8.95 79 13 Tri 02:29:58.3 +30:01:10 6.5 0.88 73 PPM 091778 02:34:18.1 +30:03:02 8.1 0.66 72 PPM 067386 02:30:31.8 +30:57:09 8.6 0.60 73 PPM 067430 02:33:03.1 +30:32:03 10.7 0.11 72 12UL177 02:32:53.1 +30:38:16 14.6 72 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
2.1 sigma about the mid-time.
The median site spacing is 16.8 km
RECON observability=1.0 and success probability=4.8%
Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
Rutland | 04:34:19 | -25.4 | Dark | Down | 25.3 | 71.9 | Low | 04:19:19 - 04:49:19 | 4966 |
Penticton | 04:34:21 | -25.5 | Dark | Down | 25.1 | 71.6 | Low | 04:19:21 - 04:49:21 | 4951 |
Okanagan Falls | 04:34:22 | -25.6 | Dark | Down | 25.0 | 71.5 | Low | 04:19:22 - 04:49:22 | 4941 |
Southern Okanagan | 04:34:23 | -25.7 | Dark | Down | 25.0 | 71.4 | Low | 04:19:23 - 04:49:23 | 4931 |
Oroville | 04:34:24 | -25.9 | Dark | Down | 25.0 | 71.4 | Low | 04:19:24 - 04:49:24 | 4912 |
Tonasket | 04:34:25 | -26.0 | Dark | Down | 24.9 | 71.3 | Low | 04:19:25 - 04:49:25 | 4898 |
Okanogan | 04:34:27 | -26.1 | Dark | Down | 24.7 | 71.1 | Low | 04:19:27 - 04:49:27 | 4883 |
Manson/Chelan | 04:34:30 | -26.1 | Dark | Down | 24.2 | 70.5 | Low | 04:19:30 - 04:49:30 | 4876 |
Brewster | 04:34:28 | -26.1 | Dark | Down | 24.5 | 70.8 | Low | 04:19:28 - 04:49:28 | 4875 |
Entiat | 04:34:31 | -26.1 | Dark | Down | 24.1 | 70.4 | Low | 04:19:31 - 04:49:31 | 4866 |
Wenatchee | 04:34:32 | -26.2 | Dark | Down | 23.9 | 70.2 | Low | 04:19:32 - 04:49:32 | 4854 |
Ellensburg | 04:34:34 | -26.3 | Dark | Down | 23.7 | 69.9 | Low | 04:19:34 - 04:49:34 | 4838 |
Yakima | 04:34:36 | -26.5 | Dark | Down | 23.5 | 69.7 | Low | 04:19:36 - 04:49:36 | 4813 |
Toppenish/White Swan | 04:34:37 | -26.7 | Dark | Down | 23.6 | 69.7 | Low | 04:19:37 - 04:49:37 | 4793 |
The Dalles | 04:34:41 | -26.7 | Dark | Down | 22.8 | 69.0 | Low | 04:19:41 - 04:49:41 | 4777 |
Goldendale | 04:34:41 | -26.8 | Dark | Down | 23.1 | 69.3 | Low | 04:19:41 - 04:49:41 | 4776 |
Maupin | 04:34:44 | -26.9 | Dark | Down | 22.7 | 68.9 | Low | 04:19:44 - 04:49:44 | 4746 |
Pasco | 04:34:38 | -27.5 | Dark | Down | 24.3 | 70.5 | Low | 04:19:38 - 04:49:38 | 4736 |
George/Umatilla | 04:34:40 | -27.6 | Dark | Down | 24.1 | 70.2 | Low | 04:19:40 - 04:49:40 | 4723 |
Madras/Culver | 04:34:46 | -27.2 | Dark | Down | 22.5 | 68.6 | Low | 04:19:46 - 04:49:46 | 4713 |
PNWRO | 04:34:38 | -27.8 | Dark | Down | 24.4 | 70.5 | Low | 04:19:38 - 04:49:38 | 4711 |
Sisters | 04:34:48 | -27.1 | Dark | Down | 22.1 | 68.2 | Low | 04:19:48 - 04:49:48 | 4710 |
Redmond | 04:34:48 | -27.3 | Dark | Down | 22.3 | 68.5 | Low | 04:19:48 - 04:49:48 | 4692 |
Bend | 04:34:49 | -27.4 | Dark | Down | 22.2 | 68.3 | Low | 04:19:49 - 04:49:49 | 4685 |
Oregon Observatory | 04:34:50 | -27.4 | Dark | Down | 22.0 | 68.2 | Low | 04:19:50 - 04:49:50 | 4679 |
La Pine/Gilchrist | 04:34:51 | -27.4 | Dark | Down | 21.9 | 68.1 | Low | 04:19:51 - 04:49:51 | 4668 |
North Lake | 04:34:53 | -28.0 | Dark | Down | 22.1 | 68.2 | Low | 04:19:53 - 04:49:53 | 4615 |
Chiloquin | 04:34:56 | -27.8 | Dark | Down | 21.2 | 67.5 | Low | 04:19:56 - 04:49:56 | 4611 |
Klamath Falls | 04:34:58 | -28.0 | Dark | Down | 21.2 | 67.4 | Low | 04:19:58 - 04:49:58 | 4585 |
Paisley | 04:34:56 | -28.5 | Dark | Down | 22.2 | 68.2 | Low | 04:19:56 - 04:49:56 | 4564 |
Tulelake | 04:35:00 | -28.3 | Dark | Down | 21.3 | 67.5 | Low | 04:20:00 - 04:50:00 | 4554 |
Lakeview | 04:34:58 | -28.9 | Dark | Down | 22.1 | 68.2 | Low | 04:19:58 - 04:49:58 | 4522 |
Fall River/Burney | 04:35:03 | -28.8 | Dark | Down | 21.0 | 67.2 | Low | 04:20:03 - 04:50:03 | 4489 |
Cedarville | 04:35:02 | -29.4 | Dark | Down | 22.0 | 68.0 | Low | 04:20:02 - 04:50:02 | 4470 |
Susanville | 04:35:06 | -29.6 | Dark | Down | 21.3 | 67.4 | Low | 04:20:06 - 04:50:06 | 4414 |
Greenville | 04:35:08 | -29.5 | Dark | Down | 21.0 | 67.1 | Low | 04:20:08 - 04:50:08 | 4408 |
Gimple | 04:35:08 | -29.6 | Dark | Down | 21.0 | 67.2 | Low | 04:20:08 - 04:50:08 | 4404 |
Quincy | 04:35:09 | -29.6 | Dark | Down | 20.9 | 67.1 | Low | 04:20:09 - 04:50:09 | 4394 |
Portola | 04:35:09 | -30.0 | Dark | Down | 21.2 | 67.3 | Low | 04:20:09 - 04:50:09 | 4364 |
Reno | 04:35:10 | -30.6 | Dark | Down | 21.6 | 67.5 | Low | 04:20:10 - 04:50:10 | 4317 |
Carson City | 04:35:12 | -30.8 | Dark | Down | 21.4 | 67.4 | Low | 04:20:12 - 04:50:12 | 4291 |
Gardnerville | 04:35:13 | -30.9 | Dark | Down | 21.4 | 67.3 | Low | 04:20:13 - 04:50:13 | 4271 |
Yerington | 04:35:13 | -31.3 | Dark | Down | 21.8 | 67.6 | Low | 04:20:13 - 04:50:13 | 4249 |
Hawthorne | 04:35:15 | -31.9 | Dark | Down | 22.0 | 67.7 | Low | 04:20:15 - 04:50:15 | 4192 |
Lee Vining | 04:35:18 | -31.8 | Dark | Down | 21.5 | 67.3 | Low | 04:20:18 - 04:50:18 | 4173 |
Bishop | 04:35:20 | -32.6 | Dark | Down | 21.8 | 67.4 | Low | 04:20:20 - 04:50:20 | 4096 |
Tonopah | 04:35:16 | -33.1 | Dark | Down | 22.9 | 68.3 | Low | 04:20:16 - 04:50:16 | 4094 |
CPSLO | 04:35:30 | -32.0 | Dark | Down | 19.3 | 65.7 | Really Low | 04:20:30 - 04:50:30 | 4047 |
Lone Pine | 04:35:23 | -33.3 | Dark | Down | 21.7 | 67.3 | Low | 04:20:23 - 04:50:23 | 4024 |
Beatty | 04:35:21 | -34.0 | Dark | Down | 22.8 | 68.1 | Low | 04:20:21 - 04:50:21 | 3987 |
Indian Springs | 04:35:23 | -34.9 | Dark | Down | 23.5 | 68.4 | Low | 04:20:23 - 04:50:23 | 3913 |
Wildwood | 04:35:34 | -34.1 | Dark | Down | 20.4 | 66.2 | Low | 04:20:34 - 04:50:34 | 3859 |
Henderson | 04:35:24 | -35.7 | Dark | Down | 23.8 | 68.5 | Low | 04:20:24 - 04:50:24 | 3839 |
Searchlight/Boulder City | 04:35:27 | -36.0 | Dark | Down | 23.7 | 68.3 | Low | 04:20:27 - 04:50:27 | 3792 |
Laughlin/Bullhead City | 04:35:28 | -36.4 | Dark | Down | 23.8 | 68.4 | Low | 04:20:28 - 04:50:28 | 3753 |
Idyllwild | 04:35:35 | -35.6 | Dark | Down | 21.7 | 66.9 | Low | 04:20:35 - 04:50:35 | 3741 |
Patrick | 04:35:26 | -36.8 | Dark | Down | 24.5 | 68.8 | Low | 04:20:26 - 04:50:26 | 3739 |
Mohave Valley | 04:35:28 | -36.6 | Dark | Down | 23.7 | 68.3 | Low | 04:20:28 - 04:50:28 | 3731 |
Kingman/Dolan Springs | 04:35:27 | -36.8 | Dark | Down | 24.2 | 68.6 | Low | 04:20:27 - 04:50:27 | 3730 |
Niwot | 04:34:57 | -39.4 | Dark | Down | 32.4 | 75.3 | Up | 04:19:57 - 04:49:57 | 3717 |
Lake Havasu City | 04:35:30 | -37.0 | Dark | Down | 23.8 | 68.2 | Low | 04:20:30 - 04:50:30 | 3688 |
DCO | 04:35:27 | -37.5 | Dark | Down | 24.9 | 69.0 | Low | 04:20:27 - 04:50:27 | 3681 |
Parker | 04:35:31 | -37.2 | Dark | Down | 23.7 | 68.1 | Low | 04:20:31 - 04:50:31 | 3659 |
Calipatria | 04:35:37 | -36.8 | Dark | Down | 22.4 | 67.2 | Low | 04:20:37 - 04:50:37 | 3637 |
Blythe | 04:35:34 | -37.2 | Dark | Down | 23.3 | 67.8 | Low | 04:20:34 - 04:50:34 | 3631 |
Yuma | 04:35:38 | -37.7 | Dark | Down | 22.9 | 67.4 | Low | 04:20:38 - 04:50:38 | 3559 |
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 12UL177, (2019/09/24 04:31UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:30 0.8 31.59 48 Hamal 02:07:10.7 +23:27:42 2.0 8.95 79 13 Tri 02:28:48.4 +29:55:55 6.5 0.88 73 PPM 091778 02:33:08.0 +29:57:52 8.1 0.66 72 PPM 067386 02:29:21.5 +30:51:55 8.6 0.60 73 PPM 067430 02:31:52.8 +30:26:52 10.7 0.11 72 12UL177 02:31:42.8 +30:33:05 14.6 72 Positions are for J2000
Event circumstances last updated at 2018/09/26 17:33:18 UT
Marc W. Buie, Southwest Research Institute