Event between (248835) 06SX368 and star UC4-662-017498 with event index number of 105506
Geocentric closest approach at 2018/02/23 03:15:17 UTC
J2000 position of star is 03:35:43.7 +42:19:40
Equinox of date position of star is 03:36:57.3 +42:23:13
Stellar brightness R=15.4,
use SENSEUP=128
Star is 27 degrees from the moon.
Moon is 48% illuminated.
TNO apparent brightness V=21.6
[RECON map]
TNO is 15.0 AU from the Sun
and 15.0 AU from the Earth.
The TNO is moving 17.4
km/sec on the sky relative to the star, or,
5.8 arcsec/hr.
The 1-sigma error in the time of the event is 131 seconds.
The 1-sigma cross-track error in the shadow position is
2746 km.
The sky-plane scale is
10889.7 km/arcsec.
The TNO has an absolute magnitude Hv=9.5
Diameter=75.9 km assuming a 5% albedo -- 4.4 sec chord
Diameter=31.0 km assuming a 30% albedo -- 1.8 sec chord
Dynamical classification is CENTAURR
Star training set for 248835, (2018/02/23 03:15UT) Object RA Dec mag sep mel Aldebaran 04:36:57.8 +16:32:40 0.8 28.85 8 Algol 03:09:21.4 +41:01:28 2.1 5.33 28 PPM 046386 03:39:14.2 +42:38:28 6.2 0.49 28 PPM 046363 03:37:23.4 +42:23:52 8.5 0.08 27 248835 03:36:57.4 +42:23:14 15.4 27 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
5.0 sigma about the mid-time.
The median site spacing is 7.0 km
RECON observability=1.0 and success probability=7.2%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Niwot | 03:16:57 | -29.7 | Dark | Up | 57.8 | 288.3 | Up | 03:05:32 - 03:28:21 | 5186 |
| Oroville | 03:15:47 | -18.0 | Dark | Up | 69.1 | 262.4 | Up | 03:04:23 - 03:27:12 | 4513 |
| Tonasket | 03:15:49 | -18.1 | Dark | Up | 69.1 | 263.0 | Up | 03:04:24 - 03:27:13 | 4503 |
| Okanogan | 03:15:50 | -18.0 | AT | Up | 69.3 | 263.7 | Up | 03:04:26 - 03:27:15 | 4480 |
| Brewster | 03:15:52 | -17.9 | AT | Up | 69.4 | 264.3 | Up | 03:04:27 - 03:27:16 | 4456 |
| PNWRO | 03:16:05 | -18.7 | Dark | Up | 68.9 | 270.5 | Up | 03:04:41 - 03:27:30 | 4429 |
| Pasco | 03:16:04 | -18.5 | Dark | Up | 69.0 | 269.7 | Up | 03:04:39 - 03:27:28 | 4424 |
| Manson/Chelan | 03:15:52 | -17.7 | AT | Up | 69.7 | 264.5 | Up | 03:04:28 - 03:27:17 | 4423 |
| Entiat | 03:15:53 | -17.6 | AT | Up | 69.8 | 265.0 | Up | 03:04:29 - 03:27:18 | 4410 |
| DCO | 03:17:17 | -24.3 | Dark | Up | 61.8 | 295.5 | Up | 03:05:53 - 03:28:42 | 4401 |
| George/Umatilla | 03:16:05 | -18.4 | Dark | Up | 69.2 | 270.4 | Up | 03:04:40 - 03:27:29 | 4395 |
| Wenatchee | 03:15:55 | -17.6 | AT | Up | 69.8 | 265.6 | Up | 03:04:30 - 03:27:19 | 4392 |
| Ellensburg | 03:15:57 | -17.5 | AT | Up | 70.0 | 266.6 | Up | 03:04:33 - 03:27:22 | 4360 |
| Patrick | 03:17:15 | -23.7 | Dark | Up | 62.5 | 295.1 | Up | 03:05:50 - 03:28:39 | 4358 |
| Toppenish/White Swan | 03:16:01 | -17.6 | AT | Up | 69.9 | 268.4 | Up | 03:04:36 - 03:27:25 | 4344 |
| Yakima | 03:15:59 | -17.5 | AT | Up | 70.0 | 267.7 | Up | 03:04:35 - 03:27:24 | 4342 |
| Kingman/Dolan Springs | 03:17:16 | -23.5 | Dark | Up | 62.5 | 295.5 | Up | 03:05:51 - 03:28:40 | 4333 |
| Henderson | 03:17:10 | -22.7 | Dark | Up | 63.6 | 294.0 | Up | 03:05:45 - 03:28:34 | 4296 |
| Laughlin/Bullhead City | 03:17:15 | -23.1 | Dark | Up | 62.9 | 295.6 | Up | 03:05:50 - 03:28:39 | 4291 |
| Goldendale | 03:16:04 | -17.4 | AT | Up | 70.2 | 269.6 | Up | 03:04:39 - 03:27:28 | 4291 |
| Lake Havasu City | 03:17:19 | -23.4 | Dark | Up | 62.4 | 296.7 | Up | 03:05:55 - 03:28:44 | 4283 |
| Mohave Valley | 03:17:17 | -23.1 | Dark | Up | 62.8 | 296.0 | Up | 03:05:52 - 03:28:41 | 4280 |
| Searchlight/Boulder City | 03:17:13 | -22.8 | Dark | Up | 63.3 | 295.1 | Up | 03:05:48 - 03:28:37 | 4276 |
| Parker | 03:17:21 | -23.4 | Dark | Up | 62.2 | 297.3 | Up | 03:05:57 - 03:28:46 | 4270 |
| Indian Springs | 03:17:05 | -22.1 | Dark | Up | 64.3 | 293.1 | Up | 03:05:41 - 03:28:30 | 4265 |
| The Dalles | 03:16:04 | -17.2 | AT | Up | 70.5 | 270.0 | Up | 03:04:40 - 03:27:29 | 4256 |
| Maupin | 03:16:06 | -17.3 | AT | Up | 70.4 | 271.3 | Up | 03:04:42 - 03:27:31 | 4245 |
| Blythe | 03:17:24 | -23.2 | Dark | Up | 62.2 | 298.2 | Up | 03:06:00 - 03:28:49 | 4223 |
| Madras/Culver | 03:16:09 | -17.3 | AT | Up | 70.4 | 272.8 | Up | 03:04:45 - 03:27:34 | 4218 |
| Tonopah | 03:16:54 | -20.7 | Dark | Up | 66.0 | 290.1 | Up | 03:05:30 - 03:28:19 | 4211 |
| Redmond | 03:16:12 | -17.3 | AT | Up | 70.4 | 273.8 | Up | 03:04:47 - 03:27:36 | 4198 |
| Beatty | 03:17:02 | -21.2 | Dark | Up | 65.3 | 292.5 | Up | 03:05:37 - 03:28:26 | 4195 |
| Yuma | 03:17:29 | -23.3 | Dark | Up | 61.7 | 299.7 | Up | 03:06:04 - 03:28:53 | 4179 |
| Bend | 03:16:12 | -17.2 | AT | Up | 70.5 | 274.3 | Up | 03:04:48 - 03:27:37 | 4179 |
| Sisters | 03:16:11 | -17.0 | AT | Up | 70.7 | 273.5 | Up | 03:04:46 - 03:27:35 | 4172 |
| Paisley | 03:16:22 | -17.8 | AT | Up | 69.7 | 278.4 | Up | 03:04:58 - 03:27:47 | 4171 |
| North Lake | 03:16:18 | -17.5 | AT | Up | 70.1 | 276.8 | Up | 03:04:54 - 03:27:43 | 4171 |
| Lakeview | 03:16:25 | -18.0 | Dark | Up | 69.5 | 279.8 | Up | 03:05:01 - 03:27:50 | 4162 |
| Oregon Observatory | 03:16:13 | -17.1 | AT | Up | 70.6 | 274.7 | Up | 03:04:49 - 03:27:38 | 4162 |
| La Pine/Gilchrist | 03:16:15 | -17.1 | AT | Up | 70.6 | 275.3 | Up | 03:04:50 - 03:27:39 | 4148 |
| Cedarville | 03:16:29 | -18.2 | Dark | Up | 69.3 | 281.6 | Up | 03:05:05 - 03:27:54 | 4145 |
| Calipatria | 03:17:25 | -22.5 | Dark | Up | 62.6 | 299.2 | Up | 03:06:00 - 03:28:49 | 4126 |
| Hawthorne | 03:16:49 | -19.6 | Dark | Up | 67.3 | 289.1 | Up | 03:05:25 - 03:28:14 | 4124 |
| Yerington | 03:16:46 | -19.1 | Dark | Up | 67.8 | 288.0 | Up | 03:05:21 - 03:28:10 | 4105 |
| Bishop | 03:16:56 | -19.8 | Dark | Up | 66.7 | 291.6 | Up | 03:05:32 - 03:28:21 | 4089 |
| Reno | 03:16:41 | -18.6 | Dark | Up | 68.5 | 286.7 | Up | 03:05:17 - 03:28:06 | 4081 |
| Lone Pine | 03:17:01 | -20.2 | Dark | Up | 66.1 | 293.2 | Up | 03:05:37 - 03:28:26 | 4081 |
| Chiloquin | 03:16:20 | -16.9 | AT | Up | 70.7 | 278.3 | Up | 03:04:55 - 03:27:44 | 4072 |
| Tulelake | 03:16:24 | -17.2 | AT | Up | 70.3 | 280.1 | Up | 03:05:00 - 03:27:49 | 4071 |
| Carson City | 03:16:44 | -18.6 | Dark | Up | 68.3 | 287.5 | Up | 03:05:19 - 03:28:08 | 4066 |
| Klamath Falls | 03:16:23 | -16.9 | AT | Up | 70.6 | 279.2 | Up | 03:04:58 - 03:27:47 | 4062 |
| Lee Vining | 03:16:52 | -19.2 | Dark | Up | 67.4 | 290.4 | Up | 03:05:27 - 03:28:16 | 4061 |
| Susanville | 03:16:35 | -17.9 | AT | Up | 69.3 | 284.4 | Up | 03:05:10 - 03:27:59 | 4059 |
| Gardnerville | 03:16:45 | -18.7 | Dark | Up | 68.2 | 288.1 | Up | 03:05:20 - 03:28:09 | 4058 |
| Idyllwild | 03:17:20 | -21.5 | Dark | Up | 63.8 | 298.5 | Up | 03:05:56 - 03:28:45 | 4057 |
| Portola | 03:16:39 | -18.1 | Dark | Up | 69.0 | 285.9 | Up | 03:05:14 - 03:28:03 | 4045 |
| Fall River/Burney | 03:16:30 | -17.3 | AT | Up | 70.1 | 282.6 | Up | 03:05:05 - 03:27:54 | 4034 |
| Gimple | 03:16:36 | -17.7 | AT | Up | 69.4 | 285.1 | Up | 03:05:12 - 03:28:01 | 4031 |
| Greenville | 03:16:36 | -17.7 | AT | Up | 69.5 | 285.1 | Up | 03:05:12 - 03:28:01 | 4024 |
| Quincy | 03:16:37 | -17.7 | AT | Up | 69.4 | 285.6 | Up | 03:05:13 - 03:28:02 | 4015 |
| Wildwood | 03:17:14 | -19.9 | Dark | Up | 65.4 | 298.3 | Up | 03:05:50 - 03:28:39 | 3922 |
| CPSLO | 03:17:04 | -18.1 | Dark | Up | 67.5 | 296.5 | Up | 03:05:39 - 03:28:28 | 3816 |
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, (2018/02/23 03:15UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:30 0.8 28.85 8 Algol 03:08:10.1 +40:57:20 2.1 5.33 28 PPM 046386 03:38:00.2 +42:34:58 6.2 0.49 28 PPM 046363 03:36:09.7 +42:20:19 8.5 0.08 27 248835 03:35:43.7 +42:19:40 15.4 27 Positions are for J2000
Event circumstances last updated at 2018/02/08 17:06:04 UT
Marc W. Buie, Southwest Research Institute