Event between (248835) 06SX368 and star UC4-664-023517 with event index number of 171056
Geocentric closest approach at 2018/12/15 11:55:57 UTC
J2000 position of star is 04:16:46.9 +42:38:38
Equinox of date position of star is 04:18:02.4 +42:41:14
Stellar brightness R=15.7,
use SENSEUP=128
Star is 79 degrees from the moon.
Moon is 50% illuminated.
TNO apparent brightness V=21.5
[RECON map]
TNO is 15.5 AU from the Sun
and 14.6 AU from the Earth.
The TNO is moving 23.5
km/sec on the sky relative to the star, or,
8.0 arcsec/hr.
The 1-sigma error in the time of the event is 356 seconds.
The 1-sigma cross-track error in the shadow position is
5797 km.
The sky-plane scale is
10619.0 km/arcsec.
The TNO has an absolute magnitude Hv=9.5
Diameter=75.9 km assuming a 5% albedo -- 3.2 sec chord
Diameter=31.0 km assuming a 30% albedo -- 1.3 sec chord
Dynamical classification is CENTAURR
Star training set for 248835, (2018/12/15 11:56UT) Object RA Dec mag sep mel Aldebaran 04:37:00.6 +16:32:45 0.8 26.45 76 Mirphak 03:25:41.1 +49:55:38 1.8 11.56 74 PPM 046963 04:19:27.2 +42:11:10 6.1 0.56 79 PPM 046894 04:15:18.2 +42:37:45 8.2 0.52 78 PPM 046938 04:17:51.2 +42:58:59 10.0 0.30 79 PPM 046961 04:19:21.8 +42:46:23 11.4 0.25 79 248835 04:18:06.3 +42:41:22 15.7 79 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
2.5 sigma about the mid-time.
The median site spacing is 19.2 km
RECON observability=1.0 and success probability=6.3%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Oroville | 11:52:24 | -36.9 | Dark | Down | 37.3 | 294.9 | Up | 11:37:24 - 12:07:24 | 3887 |
| Tonasket | 11:52:23 | -36.9 | Dark | Down | 37.2 | 295.1 | Up | 11:37:23 - 12:07:23 | 3865 |
| Okanogan | 11:52:23 | -37.1 | Dark | Down | 37.2 | 295.2 | Up | 11:37:23 - 12:07:23 | 3827 |
| Brewster | 11:52:23 | -37.2 | Dark | Down | 37.2 | 295.3 | Up | 11:37:23 - 12:07:23 | 3794 |
| Manson/Chelan | 11:52:23 | -37.5 | Dark | Down | 37.3 | 295.3 | Up | 11:37:23 - 12:07:23 | 3760 |
| Entiat | 11:52:23 | -37.6 | Dark | Down | 37.3 | 295.4 | Up | 11:37:23 - 12:07:23 | 3736 |
| Niwot | 11:51:50 | -26.6 | Dark | Down | 24.2 | 306.3 | Low | 11:36:50 - 12:06:50 | 3716 |
| Wenatchee | 11:52:22 | -37.7 | Dark | Down | 37.2 | 295.5 | Up | 11:37:22 - 12:07:22 | 3708 |
| Ellensburg | 11:52:22 | -37.9 | Dark | Down | 37.2 | 295.7 | Up | 11:37:22 - 12:07:22 | 3660 |
| Pasco | 11:52:18 | -37.0 | Dark | Down | 36.0 | 296.9 | Up | 11:37:18 - 12:07:18 | 3642 |
| PNWRO | 11:52:18 | -36.8 | Dark | Down | 35.7 | 297.1 | Up | 11:37:18 - 12:07:18 | 3627 |
| Yakima | 11:52:21 | -37.9 | Dark | Down | 37.0 | 295.9 | Up | 11:37:21 - 12:07:21 | 3620 |
| Toppenish/White Swan | 11:52:21 | -37.8 | Dark | Down | 36.8 | 296.2 | Up | 11:37:21 - 12:07:21 | 3605 |
| George/Umatilla | 11:52:18 | -37.1 | Dark | Down | 36.0 | 297.0 | Up | 11:37:18 - 12:07:18 | 3601 |
| Goldendale | 11:52:20 | -38.2 | Dark | Down | 36.9 | 296.3 | Up | 11:37:20 - 12:07:20 | 3536 |
| The Dalles | 11:52:21 | -38.4 | Dark | Down | 37.0 | 296.3 | Up | 11:37:21 - 12:07:21 | 3500 |
| Maupin | 11:52:20 | -38.4 | Dark | Down | 36.7 | 296.6 | Up | 11:37:20 - 12:07:20 | 3463 |
| Madras/Culver | 11:52:19 | -38.5 | Dark | Down | 36.5 | 297.0 | Up | 11:37:19 - 12:07:19 | 3408 |
| Redmond | 11:52:19 | -38.5 | Dark | Down | 36.4 | 297.2 | Up | 11:37:19 - 12:07:19 | 3371 |
| Sisters | 11:52:19 | -38.8 | Dark | Down | 36.6 | 297.0 | Up | 11:37:19 - 12:07:19 | 3358 |
| Bend | 11:52:19 | -38.7 | Dark | Down | 36.4 | 297.3 | Up | 11:37:19 - 12:07:19 | 3345 |
| Oregon Observatory | 11:52:19 | -38.8 | Dark | Down | 36.4 | 297.3 | Up | 11:37:19 - 12:07:19 | 3323 |
| La Pine/Gilchrist | 11:52:18 | -38.8 | Dark | Down | 36.3 | 297.4 | Up | 11:37:18 - 12:07:18 | 3301 |
| North Lake | 11:52:17 | -38.4 | Dark | Down | 35.7 | 298.0 | Up | 11:37:17 - 12:07:17 | 3282 |
| Paisley | 11:52:16 | -38.2 | Dark | Down | 35.2 | 298.5 | Up | 11:37:16 - 12:07:16 | 3242 |
| Lakeview | 11:52:14 | -38.1 | Dark | Down | 34.9 | 298.9 | Up | 11:37:14 - 12:07:14 | 3200 |
| Chiloquin | 11:52:18 | -39.2 | Dark | Down | 36.0 | 298.0 | Up | 11:37:18 - 12:07:18 | 3178 |
| Klamath Falls | 11:52:17 | -39.1 | Dark | Down | 35.8 | 298.2 | Up | 11:37:17 - 12:07:17 | 3148 |
| Cedarville | 11:52:13 | -38.0 | Dark | Down | 34.5 | 299.3 | Up | 11:37:13 - 12:07:13 | 3144 |
| Tulelake | 11:52:16 | -38.9 | Dark | Down | 35.5 | 298.5 | Up | 11:37:16 - 12:07:16 | 3133 |
| Fall River/Burney | 11:52:15 | -38.9 | Dark | Down | 35.0 | 299.1 | Up | 11:37:15 - 12:07:15 | 3047 |
| Susanville | 11:52:13 | -38.3 | Dark | Down | 34.2 | 299.8 | Up | 11:37:13 - 12:07:13 | 3016 |
| Gimple | 11:52:13 | -38.5 | Dark | Down | 34.2 | 299.9 | Up | 11:37:13 - 12:07:13 | 2980 |
| Greenville | 11:52:13 | -38.6 | Dark | Down | 34.3 | 299.8 | Up | 11:37:13 - 12:07:13 | 2977 |
| Reno | 11:52:10 | -37.7 | Dark | Down | 33.2 | 300.6 | Up | 11:37:10 - 12:07:10 | 2966 |
| Portola | 11:52:12 | -38.2 | Dark | Down | 33.8 | 300.2 | Up | 11:37:12 - 12:07:12 | 2964 |
| Quincy | 11:52:13 | -38.6 | Dark | Down | 34.2 | 300.0 | Up | 11:37:13 - 12:07:13 | 2957 |
| Yerington | 11:52:08 | -37.2 | Dark | Down | 32.5 | 301.2 | Up | 11:37:08 - 12:07:08 | 2940 |
| Tonopah | 11:52:04 | -35.7 | Dark | Down | 30.7 | 302.4 | Up | 11:37:04 - 12:07:04 | 2937 |
| Carson City | 11:52:09 | -37.7 | Dark | Down | 33.0 | 300.8 | Up | 11:37:09 - 12:07:09 | 2932 |
| Hawthorne | 11:52:07 | -36.8 | Dark | Down | 31.9 | 301.6 | Up | 11:37:07 - 12:07:07 | 2919 |
| Gardnerville | 11:52:09 | -37.6 | Dark | Down | 32.9 | 301.0 | Up | 11:37:09 - 12:07:09 | 2910 |
| Indian Springs | 11:52:00 | -34.3 | Dark | Down | 28.9 | 303.6 | Low | 11:37:00 - 12:07:00 | 2868 |
| DCO | 11:51:54 | -32.2 | Dark | Down | 26.4 | 305.1 | Low | 11:36:54 - 12:06:54 | 2854 |
| Henderson | 11:51:58 | -33.7 | Dark | Down | 28.2 | 304.1 | Low | 11:36:58 - 12:06:58 | 2851 |
| Beatty | 11:52:02 | -35.2 | Dark | Down | 29.8 | 303.1 | Low | 11:37:02 - 12:07:02 | 2848 |
| Patrick | 11:51:55 | -32.8 | Dark | Down | 27.1 | 304.8 | Low | 11:36:55 - 12:06:55 | 2847 |
| Lee Vining | 11:52:07 | -37.1 | Dark | Down | 32.0 | 301.7 | Up | 11:37:07 - 12:07:07 | 2843 |
| Bishop | 11:52:05 | -36.5 | Dark | Down | 31.2 | 302.3 | Up | 11:37:05 - 12:07:05 | 2818 |
| Kingman/Dolan Springs | 11:51:56 | -32.9 | Dark | Down | 27.1 | 304.8 | Low | 11:36:56 - 12:06:56 | 2817 |
| Searchlight/Boulder City | 11:51:57 | -33.6 | Dark | Down | 27.8 | 304.4 | Low | 11:36:57 - 12:06:57 | 2800 |
| Laughlin/Bullhead City | 11:51:56 | -33.3 | Dark | Down | 27.4 | 304.6 | Low | 11:36:56 - 12:06:56 | 2789 |
| Mohave Valley | 11:51:56 | -33.3 | Dark | Down | 27.2 | 304.7 | Low | 11:36:56 - 12:06:56 | 2764 |
| Lone Pine | 11:52:04 | -36.2 | Dark | Down | 30.5 | 302.8 | Up | 11:37:04 - 12:07:04 | 2760 |
| Lake Havasu City | 11:51:55 | -33.0 | Dark | Down | 26.8 | 305.0 | Low | 11:36:55 - 12:06:55 | 2739 |
| Parker | 11:51:55 | -33.0 | Dark | Down | 26.6 | 305.1 | Low | 11:36:55 - 12:06:55 | 2708 |
| Blythe | 11:51:55 | -33.1 | Dark | Down | 26.5 | 305.3 | Low | 11:36:55 - 12:06:55 | 2644 |
| Yuma | 11:51:55 | -33.0 | Dark | Down | 26.0 | 305.6 | Low | 11:36:55 - 12:06:55 | 2556 |
| Calipatria | 11:51:57 | -33.8 | Dark | Down | 26.9 | 305.2 | Low | 11:36:57 - 12:06:57 | 2552 |
| Idyllwild | 11:51:59 | -34.9 | Dark | Down | 28.0 | 304.6 | Low | 11:36:59 - 12:06:59 | 2551 |
| CPSLO | 11:52:08 | -38.2 | Dark | Down | 31.6 | 302.6 | Up | 11:37:08 - 12:07:08 | 2519 |
| Wildwood | 11:52:02 | -36.5 | Dark | Down | 29.5 | 303.8 | Low | 11:37:02 - 12:07:02 | 2496 |
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 248835, (2018/12/15 11:56UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:30 0.8 26.45 76 Mirphak 03:24:19.4 +49:51:40 1.8 11.56 74 PPM 046963 04:18:08.2 +42:08:28 6.1 0.56 79 PPM 046894 04:13:59.0 +42:34:57 8.2 0.52 78 PPM 046938 04:16:31.7 +42:56:14 10.0 0.30 79 PPM 046961 04:18:02.3 +42:43:40 11.4 0.25 79 248835 04:16:46.9 +42:38:38 15.7 79 Positions are for J2000
Event circumstances last updated at 2018/01/09 17:45:45 UT
Marc W. Buie, Southwest Research Institute