Event between (531682) 12UB178 and star GA1020:00407114 with event index number of 1601413
Geocentric closest approach at 2019/12/20 09:18:35 UTC
J2000 position of star is 04:05:43.7 +12:37:24
Equinox of date position of star is 04:06:48.8 +12:40:30
Stellar brightness G=16.4,
use SENSEUP=128
Star is 132 degrees from the moon.
Moon is 37% illuminated.
TNO apparent brightness V=22.7
[RECON map]
TNO is 47.0 AU from the Sun
and 46.2 AU from the Earth.
The TNO is moving 23.1
km/sec on the sky relative to the star, or,
2.5 arcsec/hr.
The 1-sigma error in the time of the event is 250 seconds.
The 1-sigma cross-track error in the shadow position is
1813 km.
The sky-plane scale is
33481.2 km/arcsec.
The TNO has an absolute magnitude Hv=6.0
Diameter=380.2 km assuming a 5% albedo -- 16.4 sec chord
Diameter=155.2 km assuming a 30% albedo -- 6.7 sec chord
Dynamical classification is CLASSICAL
Star training set for 531682, (2019/12/20 09:19UT) Object RA Dec mag sep mel Aldebaran 04:37:04.1 +16:32:52 0.8 8.27 124 Menkar 03:03:19.5 +04:10:01 2.5 17.85 149 PPM 119653 04:10:08.7 +13:26:59 5.9 1.12 131 PPM 119633 04:08:17.8 +12:19:14 7.9 0.50 132 PPM 119590 04:05:25.5 +12:33:40 8.7 0.36 132 531682 04:06:50.4 +12:40:34 16.4 132 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
3.6 sigma about the mid-time.
The median site spacing is 23.1 km
RECON observability=1.0 and success probability=9.0%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Kelowna | 09:16:05 | -59.1 | Dark | Up | 36.6 | 242.6 | Up | 09:01:05 - 09:31:05 | -2922 |
| Summerland | 09:16:05 | -59.5 | Dark | Up | 36.9 | 242.5 | Up | 09:01:05 - 09:31:05 | -2950 |
| Penticton | 09:16:04 | -59.5 | Dark | Up | 36.9 | 242.7 | Up | 09:01:04 - 09:31:04 | -2955 |
| Okanagan Falls | 09:16:04 | -59.7 | Dark | Up | 37.0 | 242.8 | Up | 09:01:04 - 09:31:04 | -2973 |
| Oliver | 09:16:03 | -59.8 | Dark | Up | 37.1 | 242.9 | Up | 09:01:03 - 09:31:03 | -2987 |
| Anarchist Mountain Observatory | 09:16:03 | -59.8 | Dark | Up | 37.0 | 243.2 | Up | 09:01:03 - 09:31:03 | -3002 |
| Oroville | 09:16:02 | -59.9 | Dark | Up | 37.1 | 243.2 | Up | 09:01:02 - 09:31:02 | -3009 |
| Tonasket | 09:16:02 | -60.1 | Dark | Up | 37.2 | 243.3 | Up | 09:01:02 - 09:31:02 | -3030 |
| Okanogan | 09:16:02 | -60.4 | Dark | Up | 37.5 | 243.4 | Up | 09:01:02 - 09:31:02 | -3062 |
| Brewster | 09:16:01 | -60.7 | Dark | Up | 37.7 | 243.4 | Up | 09:01:01 - 09:31:01 | -3088 |
| Manson/Chelan | 09:16:02 | -61.0 | Dark | Up | 38.0 | 243.2 | Up | 09:01:02 - 09:31:02 | -3109 |
| Wenatchee | 09:16:02 | -61.5 | Dark | Up | 38.3 | 243.3 | Up | 09:01:02 - 09:31:02 | -3154 |
| Ellensburg | 09:16:02 | -61.9 | Dark | Up | 38.7 | 243.4 | Up | 09:01:02 - 09:31:02 | -3193 |
| Yakima | 09:16:00 | -62.2 | Dark | Up | 38.9 | 243.7 | Up | 09:01:00 - 09:31:00 | -3231 |
| Toppenish/White Swan | 09:16:00 | -62.3 | Dark | Up | 38.8 | 244.0 | Up | 09:01:00 - 09:31:00 | -3250 |
| Pasco | 09:15:56 | -61.8 | Dark | Up | 38.1 | 245.3 | Up | 09:00:56 - 09:30:56 | -3255 |
| PNWRO | 09:15:55 | -61.9 | Dark | Up | 38.1 | 245.7 | Up | 09:00:55 - 09:30:55 | -3277 |
| George/Umatilla | 09:15:56 | -62.2 | Dark | Up | 38.4 | 245.3 | Up | 09:00:56 - 09:30:56 | -3287 |
| Goldendale | 09:16:00 | -62.9 | Dark | Up | 39.3 | 244.0 | Up | 09:01:00 - 09:31:00 | -3305 |
| The Dalles | 09:16:00 | -63.2 | Dark | Up | 39.7 | 243.8 | Up | 09:01:00 - 09:31:00 | -3328 |
| Maupin | 09:15:59 | -63.5 | Dark | Up | 39.8 | 244.2 | Up | 09:00:59 - 09:30:59 | -3367 |
| Madras/Culver | 09:15:58 | -63.9 | Dark | Up | 40.1 | 244.6 | Up | 09:00:58 - 09:30:58 | -3419 |
| Sisters | 09:15:58 | -64.4 | Dark | Up | 40.5 | 244.4 | Up | 09:00:58 - 09:30:58 | -3453 |
| Redmond | 09:15:58 | -64.2 | Dark | Up | 40.2 | 244.8 | Up | 09:00:58 - 09:30:58 | -3453 |
| Bend | 09:15:57 | -64.5 | Dark | Up | 40.4 | 244.8 | Up | 09:00:57 - 09:30:57 | -3475 |
| Oregon Observatory | 09:15:58 | -64.7 | Dark | Up | 40.6 | 244.9 | Up | 09:00:58 - 09:30:58 | -3492 |
| La Pine/Gilchrist | 09:15:58 | -64.8 | Dark | Up | 40.7 | 245.0 | Up | 09:00:58 - 09:30:58 | -3512 |
| North Lake | 09:15:55 | -64.9 | Dark | Up | 40.5 | 245.9 | Up | 09:00:55 - 09:30:55 | -3551 |
| Paisley | 09:15:53 | -65.1 | Dark | Up | 40.5 | 246.6 | Up | 09:00:53 - 09:30:53 | -3603 |
| Chiloquin | 09:15:56 | -65.8 | Dark | Up | 41.4 | 245.5 | Up | 09:00:56 - 09:30:56 | -3622 |
| Lakeview | 09:15:52 | -65.3 | Dark | Up | 40.6 | 247.2 | Up | 09:00:52 - 09:30:52 | -3651 |
| Klamath Falls | 09:15:55 | -66.0 | Dark | Up | 41.5 | 245.8 | Up | 09:00:55 - 09:30:55 | -3655 |
| Tulelake | 09:15:55 | -66.1 | Dark | Up | 41.4 | 246.3 | Up | 09:00:55 - 09:30:55 | -3680 |
| Cedarville | 09:15:50 | -65.7 | Dark | Up | 40.7 | 247.9 | Up | 09:00:50 - 09:30:50 | -3714 |
| SwRI | 09:15:14 | -56.8 | Dark | Up | 30.4 | 260.7 | Up | 09:00:14 - 09:30:14 | -3739 |
| Fall River/Burney | 09:15:52 | -66.7 | Dark | Up | 41.7 | 247.2 | Up | 09:00:52 - 09:30:52 | -3769 |
| Susanville | 09:15:49 | -66.7 | Dark | Up | 41.5 | 248.3 | Up | 09:00:49 - 09:30:49 | -3827 |
| Gimple | 09:15:50 | -67.0 | Dark | Up | 41.7 | 248.4 | Up | 09:00:50 - 09:30:50 | -3856 |
| Greenville | 09:15:50 | -67.0 | Dark | Up | 41.8 | 248.3 | Up | 09:00:50 - 09:30:50 | -3856 |
| Quincy | 09:15:49 | -67.2 | Dark | Up | 41.8 | 248.5 | Up | 09:00:49 - 09:30:49 | -3876 |
| Portola | 09:15:48 | -67.0 | Dark | Up | 41.5 | 249.0 | Up | 09:00:48 - 09:30:48 | -3886 |
| Reno | 09:15:46 | -66.8 | Dark | Up | 41.2 | 249.8 | Up | 09:00:46 - 09:30:46 | -3909 |
| Carson City | 09:15:45 | -67.0 | Dark | Up | 41.3 | 250.1 | Up | 09:00:45 - 09:30:45 | -3944 |
| Yerington | 09:15:44 | -66.7 | Dark | Up | 40.9 | 250.8 | Up | 09:00:44 - 09:30:44 | -3960 |
| Gardnerville | 09:15:45 | -67.1 | Dark | Up | 41.3 | 250.3 | Up | 09:00:45 - 09:30:45 | -3969 |
| Hawthorne | 09:15:41 | -66.6 | Dark | Up | 40.7 | 251.6 | Up | 09:00:41 - 09:30:41 | -4003 |
| Tonopah | 09:15:37 | -66.0 | Dark | Up | 39.8 | 253.1 | Up | 09:00:37 - 09:30:37 | -4041 |
| Lee Vining | 09:15:41 | -67.3 | Dark | Up | 41.2 | 251.7 | Up | 09:00:41 - 09:30:41 | -4063 |
| Bishop | 09:15:39 | -67.1 | Dark | Up | 40.8 | 252.7 | Up | 09:00:39 - 09:30:39 | -4119 |
| Beatty | 09:15:34 | -66.2 | Dark | Up | 39.7 | 254.4 | Up | 09:00:34 - 09:30:34 | -4154 |
| Indian Springs | 09:15:30 | -65.6 | Dark | Up | 39.0 | 255.5 | Up | 09:00:30 - 09:30:30 | -4180 |
| Lone Pine | 09:15:36 | -67.3 | Dark | Up | 40.8 | 253.6 | Up | 09:00:36 - 09:30:36 | -4194 |
| Henderson | 09:15:28 | -65.3 | Dark | Up | 38.6 | 256.4 | Up | 09:00:28 - 09:30:28 | -4228 |
| Patrick | 09:15:24 | -64.8 | Dark | Up | 37.9 | 257.7 | Up | 09:00:24 - 09:30:24 | -4283 |
| Searchlight/Boulder City | 09:15:26 | -65.5 | Dark | Up | 38.7 | 256.9 | Up | 09:00:26 - 09:30:26 | -4287 |
| Kingman/Dolan Springs | 09:15:24 | -65.0 | Dark | Up | 38.1 | 257.7 | Up | 09:00:24 - 09:30:24 | -4308 |
| Laughlin/Bullhead City | 09:15:25 | -65.4 | Dark | Up | 38.5 | 257.4 | Up | 09:00:25 - 09:30:25 | -4314 |
| Mohave Valley | 09:15:25 | -65.5 | Dark | Up | 38.5 | 257.6 | Up | 09:00:25 - 09:30:25 | -4342 |
| CPSLO | 09:15:42 | -69.7 | Dark | Up | 43.2 | 252.7 | Up | 09:00:42 - 09:30:42 | -4344 |
| Lake Havasu City | 09:15:24 | -65.4 | Dark | Up | 38.4 | 258.1 | Up | 09:00:24 - 09:30:24 | -4382 |
| Parker | 09:15:23 | -65.5 | Dark | Up | 38.5 | 258.4 | Up | 09:00:23 - 09:30:23 | -4418 |
| Wildwood | 09:15:34 | -68.8 | Dark | Up | 41.9 | 255.3 | Up | 09:00:34 - 09:30:34 | -4456 |
| Blythe | 09:15:23 | -65.9 | Dark | Up | 38.8 | 258.6 | Up | 09:00:23 - 09:30:23 | -4475 |
| Idyllwild | 09:15:28 | -67.5 | Dark | Up | 40.5 | 257.0 | Up | 09:00:28 - 09:30:28 | -4480 |
| Calipatria | 09:15:25 | -66.8 | Dark | Up | 39.7 | 258.3 | Up | 09:00:25 - 09:30:25 | -4534 |
| Yuma | 09:15:21 | -66.2 | Dark | Up | 39.0 | 259.3 | Up | 09:00:21 - 09:30:21 | -4571 |
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 531682, (2019/12/20 09:19UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:30 0.8 8.27 124 Menkar 03:02:16.8 +04:05:21 2.5 17.85 149 PPM 119653 04:09:01.7 +13:23:54 5.9 1.12 131 PPM 119633 04:07:11.3 +12:16:05 7.9 0.50 132 PPM 119590 04:04:18.9 +12:30:27 8.7 0.36 132 531682 04:05:43.7 +12:37:24 16.4 132 Positions are for J2000
Event circumstances last updated at 2019/07/02 02:25:05 UT
Marc W. Buie, Southwest Research Institute