Event between (469362) 01KB77 and star UC4-388-078273 with event index number of 149862
Geocentric closest approach at 2018/04/25 11:10:59 UTC
J2000 position of star is 17:16:53.5 -12:32:54
Equinox of date position of star is 17:17:53.8 -12:34:00
Stellar brightness R=16.0,
use SENSEUP=128
Star is 100 degrees from the moon.
Moon is 77% illuminated.
TNO apparent brightness V=22.1
[RECON map]
TNO is 28.7 AU from the Sun
and 27.9 AU from the Earth.
The TNO is moving 15.7
km/sec on the sky relative to the star, or,
2.8 arcsec/hr.
The 1-sigma error in the time of the event is 230 seconds.
The 1-sigma cross-track error in the shadow position is
1764 km.
The sky-plane scale is
20263.2 km/arcsec.
The TNO has an absolute magnitude Hv=7.4
Diameter=199.5 km assuming a 5% albedo -- 12.7 sec chord
Diameter=81.5 km assuming a 30% albedo -- 5.2 sec chord
Dynamical classification is 3:2E
Star training set for 469362, (2018/04/25 11:11UT) Object RA Dec mag sep mel Antares 16:30:32.0 -26:28:16 0.9 17.81 92 35Eta Oph 17:11:25.8 -15:44:47 2.6 3.55 99 53Nu Ser 17:21:51.5 -12:51:51 4.0 1.01 101 PPM 232885 17:18:53.4 -12:19:54 8.4 0.33 101 PPM 232864 17:17:58.2 -12:38:54 9.8 0.08 100 469362 17:17:55.1 -12:34:02 16.0 101 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
3.9 sigma about the mid-time.
The median site spacing is 9.5 km
RECON observability=0.9 and success probability=0.5%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Oroville | 11:13:09 | -14.1 | AT | Up | 28.5 | 183.4 | Low | 10:58:09 - 11:28:09 | 6817 |
| Tonasket | 11:13:08 | -14.3 | AT | Up | 28.7 | 183.4 | Low | 10:58:08 - 11:28:08 | 6806 |
| Okanogan | 11:13:09 | -14.5 | AT | Up | 29.0 | 183.2 | Low | 10:58:09 - 11:28:09 | 6786 |
| Niwot | 11:11:45 | -10.8 | CT | Down | 35.0 | 200.4 | Up | 10:56:45 - 11:26:45 | 6783 |
| Brewster | 11:13:09 | -14.8 | AT | Up | 29.3 | 183.0 | Low | 10:58:09 - 11:28:09 | 6767 |
| Manson/Chelan | 11:13:11 | -15.1 | AT | Up | 29.5 | 182.6 | Low | 10:58:11 - 11:28:11 | 6746 |
| Entiat | 11:13:10 | -15.3 | AT | Up | 29.8 | 182.5 | Low | 10:58:10 - 11:28:10 | 6733 |
| Wenatchee | 11:13:11 | -15.5 | AT | Up | 30.0 | 182.4 | Up | 10:58:11 - 11:28:11 | 6717 |
| Pasco | 11:13:03 | -15.7 | AT | Down | 31.1 | 183.8 | Up | 10:58:03 - 11:28:03 | 6695 |
| Ellensburg | 11:13:11 | -15.9 | AT | Up | 30.4 | 182.2 | Up | 10:58:11 - 11:28:11 | 6690 |
| PNWRO | 11:13:02 | -15.7 | AT | Down | 31.4 | 184.1 | Up | 10:58:02 - 11:28:02 | 6689 |
| George/Umatilla | 11:13:04 | -16.0 | AT | Down | 31.5 | 183.6 | Up | 10:58:04 - 11:28:04 | 6671 |
| Yakima | 11:13:10 | -16.2 | AT | Up | 30.8 | 182.2 | Up | 10:58:10 - 11:28:10 | 6669 |
| Toppenish/White Swan | 11:13:09 | -16.3 | AT | Up | 31.0 | 182.4 | Up | 10:58:09 - 11:28:09 | 6663 |
| Goldendale | 11:13:10 | -16.8 | AT | Up | 31.6 | 181.9 | Up | 10:58:10 - 11:28:10 | 6621 |
| The Dalles | 11:13:11 | -17.2 | AT | Up | 31.8 | 181.5 | Up | 10:58:11 - 11:28:11 | 6598 |
| Maupin | 11:13:10 | -17.4 | AT | Up | 32.3 | 181.6 | Up | 10:58:10 - 11:28:10 | 6579 |
| Madras/Culver | 11:13:09 | -17.8 | AT | Up | 32.8 | 181.6 | Up | 10:58:09 - 11:28:09 | 6548 |
| Redmond | 11:13:09 | -18.0 | Dark | Up | 33.2 | 181.5 | Up | 10:58:09 - 11:28:09 | 6527 |
| Sisters | 11:13:11 | -18.2 | Dark | Up | 33.1 | 181.1 | Up | 10:58:11 - 11:28:11 | 6515 |
| Bend | 11:13:09 | -18.3 | Dark | Up | 33.4 | 181.4 | Up | 10:58:09 - 11:28:09 | 6510 |
| Oregon Observatory | 11:13:10 | -18.4 | Dark | Up | 33.6 | 181.2 | Up | 10:58:10 - 11:28:10 | 6496 |
| La Pine/Gilchrist | 11:13:10 | -18.6 | Dark | Up | 33.8 | 181.2 | Up | 10:58:10 - 11:28:10 | 6483 |
| North Lake | 11:13:05 | -18.6 | Dark | Up | 34.2 | 181.9 | Up | 10:58:05 - 11:28:05 | 6478 |
| Paisley | 11:13:04 | -18.7 | Dark | Down | 34.7 | 182.3 | Up | 10:58:04 - 11:28:04 | 6459 |
| Lakeview | 11:13:02 | -18.9 | Dark | Down | 35.2 | 182.5 | Up | 10:58:02 - 11:28:02 | 6435 |
| Chiloquin | 11:13:09 | -19.5 | Dark | Up | 34.9 | 180.7 | Up | 10:58:09 - 11:28:09 | 6408 |
| Cedarville | 11:13:00 | -19.3 | Dark | Down | 35.9 | 182.7 | Up | 10:58:00 - 11:28:00 | 6403 |
| Klamath Falls | 11:13:09 | -19.7 | Dark | Up | 35.2 | 180.8 | Up | 10:58:09 - 11:28:09 | 6391 |
| Tulelake | 11:13:05 | -19.7 | Dark | Up | 35.5 | 181.2 | Up | 10:58:05 - 11:28:05 | 6385 |
| Fall River/Burney | 11:13:05 | -20.3 | Dark | Down | 36.4 | 181.3 | Up | 10:58:05 - 11:28:05 | 6334 |
| Susanville | 11:12:58 | -20.3 | Dark | Down | 37.0 | 182.2 | Up | 10:57:58 - 11:27:58 | 6321 |
| Gimple | 11:13:01 | -20.6 | Dark | Down | 37.3 | 181.9 | Up | 10:58:01 - 11:28:01 | 6297 |
| Reno | 11:12:54 | -20.3 | Dark | Down | 37.9 | 183.2 | Up | 10:57:54 - 11:27:54 | 6296 |
| Greenville | 11:13:01 | -20.6 | Dark | Down | 37.3 | 181.8 | Up | 10:58:01 - 11:28:01 | 6294 |
| Tonopah | 11:12:38 | -19.6 | Dark | Down | 39.2 | 186.5 | Up | 10:57:38 - 11:27:38 | 6292 |
| Portola | 11:12:58 | -20.5 | Dark | Down | 37.6 | 182.4 | Up | 10:57:58 - 11:27:58 | 6290 |
| Yerington | 11:12:50 | -20.3 | Dark | Down | 38.4 | 184.0 | Up | 10:57:50 - 11:27:50 | 6284 |
| Quincy | 11:13:01 | -20.7 | Dark | Down | 37.5 | 181.9 | Up | 10:58:01 - 11:28:01 | 6282 |
| Carson City | 11:12:53 | -20.5 | Dark | Down | 38.2 | 183.3 | Up | 10:57:53 - 11:27:53 | 6275 |
| Hawthorne | 11:12:47 | -20.2 | Dark | Down | 38.8 | 184.7 | Up | 10:57:47 - 11:27:47 | 6273 |
| Gardnerville | 11:12:52 | -20.7 | Dark | Down | 38.5 | 183.3 | Up | 10:57:52 - 11:27:52 | 6261 |
| Indian Springs | 11:12:25 | -19.5 | Dark | Down | 40.5 | 188.5 | Up | 10:57:25 - 11:27:25 | 6250 |
| DCO | 11:12:10 | -18.7 | Dark | Down | 41.6 | 191.9 | Up | 10:57:10 - 11:27:10 | 6241 |
| Henderson | 11:12:23 | -19.4 | Dark | Down | 40.9 | 189.5 | Up | 10:57:23 - 11:27:23 | 6240 |
| Patrick | 11:12:16 | -19.0 | Dark | Down | 41.4 | 191.0 | Up | 10:57:16 - 11:27:16 | 6237 |
| Beatty | 11:12:33 | -20.0 | Dark | Down | 40.3 | 187.1 | Up | 10:57:33 - 11:27:33 | 6235 |
| Lee Vining | 11:12:48 | -20.9 | Dark | Down | 39.4 | 184.1 | Up | 10:57:48 - 11:27:48 | 6221 |
| Kingman/Dolan Springs | 11:12:15 | -19.2 | Dark | Down | 41.6 | 190.7 | Up | 10:57:15 - 11:27:15 | 6216 |
| Bishop | 11:12:43 | -20.8 | Dark | Down | 39.9 | 185.1 | Up | 10:57:43 - 11:27:43 | 6208 |
| Searchlight/Boulder City | 11:12:20 | -19.7 | Dark | Down | 41.5 | 189.6 | Up | 10:57:20 - 11:27:20 | 6205 |
| Laughlin/Bullhead City | 11:12:19 | -19.6 | Dark | Down | 41.7 | 190.1 | Up | 10:57:19 - 11:27:19 | 6197 |
| Mohave Valley | 11:12:18 | -19.8 | Dark | Down | 42.0 | 190.1 | Up | 10:57:18 - 11:27:18 | 6180 |
| Lone Pine | 11:12:39 | -21.0 | Dark | Down | 40.7 | 185.5 | Up | 10:57:39 - 11:27:39 | 6171 |
| Lake Havasu City | 11:12:14 | -19.8 | Dark | Down | 42.4 | 190.5 | Up | 10:57:14 - 11:27:14 | 6162 |
| Parker | 11:12:14 | -20.0 | Dark | Down | 42.7 | 190.6 | Up | 10:57:14 - 11:27:14 | 6139 |
| Blythe | 11:12:16 | -20.5 | Dark | Down | 43.3 | 190.3 | Up | 10:57:16 - 11:27:16 | 6094 |
| Yuma | 11:12:13 | -21.0 | Dark | Down | 44.2 | 190.4 | Up | 10:57:13 - 11:27:13 | 6030 |
| Calipatria | 11:12:18 | -21.4 | Dark | Down | 43.9 | 189.2 | Up | 10:57:18 - 11:27:18 | 6028 |
| Idyllwild | 11:12:27 | -21.8 | Dark | Down | 43.4 | 187.5 | Up | 10:57:27 - 11:27:27 | 6028 |
| CPSLO | 11:12:51 | -23.5 | Dark | Down | 42.1 | 182.3 | Up | 10:57:51 - 11:27:51 | 5993 |
| Wildwood | 11:12:37 | -22.9 | Dark | Down | 43.2 | 185.0 | Up | 10:57:37 - 11:27:37 | 5985 |
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 469362, (2018/04/25 11:11UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 17.81 92 35Eta Oph 17:10:22.7 -15:43:29 2.6 3.55 99 53Nu Ser 17:20:49.7 -12:50:49 4.0 1.01 101 PPM 232885 17:17:51.8 -12:18:47 8.4 0.33 101 PPM 232864 17:16:56.5 -12:37:46 9.8 0.08 100 469362 17:16:53.5 -12:32:54 16.0 100 Positions are for J2000
Event circumstances last updated at 2017/12/02 17:28:11 UT
Marc W. Buie, Southwest Research Institute