Event between (469987) 06HJ123 and star UC4-369-073803 with event index number of 147323
Geocentric closest approach at 2017/05/10 10:02:50 UTC
J2000 position of star is 16:05:09.0 -16:23:28
Equinox of date position of star is 16:06:06.1 -16:26:08
Stellar brightness R=16.2
Star is 18 degrees from the moon.
Moon is 100% illuminated.
TNO apparent brightness V=21.3
[RECON map]
TNO is 34.4 AU from the Sun
and 33.4 AU from the Earth.
The TNO is moving 23.6
km/sec on the sky relative to the star, or,
3.5 arcsec/hr.
The 1-sigma error in the time of the event is 68 seconds.
The 1-sigma cross-track error in the shadow position is
1242 km.
The sky-plane scale is
24259.4 km/arcsec.
The TNO has an absolute magnitude Hv=5.9
Diameter=398.1 km assuming a 5% albedo -- 16.9 sec chord
Diameter=162.5 km assuming a 30% albedo -- 6.9 sec chord
Dynamical classification is 3:2E
Star training set for 469987, (2017/05/10 10:03UT) Object RA Dec mag sep mel Antares 16:30:28.5 -26:28:09 0.9 11.51 27 8Bet1Sco 16:06:26.9 -19:51:06 2.6 3.41 19 49 Lib 16:01:18.2 -16:35:00 5.5 1.17 17 PPM 231136 16:04:33.0 -16:26:56 8.2 0.38 17 PPM 231168 16:06:04.4 -16:40:41 9.3 0.24 18 PPM 231169 16:06:05.4 -16:12:29 10.1 0.23 18 469987 16:06:08.4 -16:26:15 16.2 18 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 11.9 km
RECON observability=1.0 and success probability=0.1%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Oroville | 10:02:57 | -17.5 | AT | Up | 22.7 | 199.2 | Low | 09:56:46 - 10:09:08 | 6455 |
| Tonasket | 10:02:57 | -17.7 | AT | Up | 22.9 | 199.2 | Low | 09:56:46 - 10:09:08 | 6446 |
| Okanogan | 10:02:57 | -18.0 | AT | Up | 23.2 | 199.1 | Low | 09:56:46 - 10:09:08 | 6431 |
| Brewster | 10:02:57 | -18.3 | Dark | Up | 23.5 | 198.9 | Low | 09:56:46 - 10:09:08 | 6418 |
| Manson/Chelan | 10:02:57 | -18.6 | Dark | Up | 23.8 | 198.6 | Low | 09:56:46 - 10:09:08 | 6405 |
| Entiat | 10:02:57 | -18.8 | Dark | Up | 24.0 | 198.5 | Low | 09:56:46 - 10:09:08 | 6395 |
| Wenatchee | 10:02:57 | -19.1 | Dark | Up | 24.3 | 198.5 | Low | 09:56:46 - 10:09:08 | 6383 |
| Ellensburg | 10:02:57 | -19.5 | Dark | Up | 24.7 | 198.3 | Low | 09:56:46 - 10:09:08 | 6363 |
| Pasco | 10:02:51 | -19.6 | Dark | Up | 25.1 | 199.9 | Low | 09:56:40 - 10:09:02 | 6347 |
| Yakima | 10:02:57 | -19.8 | Dark | Up | 25.1 | 198.3 | Low | 09:56:46 - 10:09:08 | 6345 |
| PNWRO | 10:02:50 | -19.7 | Dark | Up | 25.3 | 200.1 | Low | 09:56:39 - 10:09:01 | 6339 |
| Toppenish/White Swan | 10:02:56 | -20.0 | Dark | Up | 25.3 | 198.6 | Low | 09:56:45 - 10:09:07 | 6338 |
| George/Umatilla | 10:02:51 | -20.0 | Dark | Up | 25.5 | 199.7 | Low | 09:56:40 - 10:09:02 | 6330 |
| Goldendale | 10:02:56 | -20.6 | Dark | Up | 25.9 | 198.2 | Low | 09:56:45 - 10:09:07 | 6308 |
| The Dalles | 10:02:57 | -20.9 | Dark | Up | 26.2 | 197.8 | Low | 09:56:46 - 10:09:08 | 6293 |
| Maupin | 10:02:56 | -21.2 | Dark | Up | 26.6 | 198.0 | Low | 09:56:45 - 10:09:07 | 6275 |
| Madras/Culver | 10:02:55 | -21.7 | Dark | Up | 27.1 | 198.1 | Low | 09:56:44 - 10:09:06 | 6249 |
| Redmond | 10:02:55 | -22.1 | Dark | Up | 27.5 | 198.1 | Low | 09:56:44 - 10:09:06 | 6232 |
| Sisters | 10:02:56 | -22.2 | Dark | Up | 27.5 | 197.6 | Low | 09:56:45 - 10:09:07 | 6228 |
| Bend | 10:02:55 | -22.3 | Dark | Up | 27.7 | 197.9 | Low | 09:56:44 - 10:09:06 | 6220 |
| Oregon Observatory | 10:02:55 | -22.5 | Dark | Up | 27.9 | 197.8 | Low | 09:56:44 - 10:09:06 | 6210 |
| La Pine/Gilchrist | 10:02:55 | -22.7 | Dark | Up | 28.1 | 197.8 | Low | 09:56:44 - 10:09:06 | 6199 |
| North Lake | 10:02:53 | -22.8 | Dark | Up | 28.4 | 198.5 | Low | 09:56:42 - 10:09:04 | 6186 |
| Niwot | 10:01:57 | -17.9 | AT | Up | 25.9 | 214.9 | Low | 09:55:46 - 10:08:08 | 6178 |
| Paisley | 10:02:50 | -23.2 | Dark | Up | 28.8 | 199.0 | Low | 09:56:39 - 10:09:01 | 6163 |
| Lakeview | 10:02:49 | -23.5 | Dark | Up | 29.2 | 199.3 | Low | 09:56:38 - 10:09:00 | 6140 |
| Chiloquin | 10:02:54 | -23.8 | Dark | Up | 29.2 | 197.6 | Low | 09:56:43 - 10:09:05 | 6139 |
| Klamath Falls | 10:02:54 | -24.0 | Dark | Up | 29.5 | 197.8 | Low | 09:56:43 - 10:09:05 | 6122 |
| Tulelake | 10:02:52 | -24.1 | Dark | Up | 29.7 | 198.1 | Low | 09:56:41 - 10:09:03 | 6112 |
| Cedarville | 10:02:48 | -24.0 | Dark | Up | 29.8 | 199.6 | Low | 09:56:37 - 10:08:59 | 6108 |
| Fall River/Burney | 10:02:50 | -24.9 | Dark | Up | 30.6 | 198.4 | Up | 09:56:39 - 10:09:01 | 6065 |
| Susanville | 10:02:48 | -25.1 | Dark | Up | 31.0 | 199.3 | Up | 09:56:37 - 10:08:59 | 6042 |
| Greenville | 10:02:48 | -25.5 | Dark | Up | 31.3 | 199.0 | Up | 09:56:37 - 10:08:59 | 6023 |
| Portola | 10:02:45 | -25.6 | Dark | Up | 31.5 | 199.6 | Up | 09:56:34 - 10:08:56 | 6012 |
| Quincy | 10:02:48 | -25.7 | Dark | Up | 31.5 | 199.1 | Up | 09:56:37 - 10:08:59 | 6012 |
| Reno | 10:02:43 | -25.5 | Dark | Up | 31.6 | 200.3 | Up | 09:56:32 - 10:08:54 | 6006 |
| Carson City | 10:02:43 | -25.8 | Dark | Up | 31.9 | 200.4 | Up | 09:56:32 - 10:08:54 | 5986 |
| Yerington | 10:02:40 | -25.7 | Dark | Up | 31.9 | 201.2 | Up | 09:56:29 - 10:08:51 | 5983 |
| Gardnerville | 10:02:43 | -26.0 | Dark | Up | 32.1 | 200.5 | Up | 09:56:32 - 10:08:54 | 5973 |
| Hawthorne | 10:02:39 | -25.8 | Dark | Up | 32.2 | 201.8 | Up | 09:56:28 - 10:08:50 | 5964 |
| Tonopah | 10:02:32 | -25.6 | Dark | Up | 32.2 | 203.4 | Up | 09:56:21 - 10:08:43 | 5955 |
| Lee Vining | 10:02:39 | -26.5 | Dark | Up | 32.9 | 201.4 | Up | 09:56:28 - 10:08:50 | 5926 |
| Bishop | 10:02:35 | -26.7 | Dark | Up | 33.2 | 202.4 | Up | 09:56:24 - 10:08:46 | 5900 |
| Beatty | 10:02:28 | -26.3 | Dark | Up | 33.2 | 204.2 | Up | 09:56:17 - 10:08:39 | 5893 |
| Indian Springs | 10:02:25 | -26.0 | Dark | Up | 33.1 | 205.4 | Up | 09:56:14 - 10:08:36 | 5886 |
| Henderson | 10:02:21 | -26.1 | Dark | Up | 33.3 | 206.3 | Up | 09:56:10 - 10:08:32 | 5862 |
| Lone Pine | 10:02:33 | -27.1 | Dark | Up | 33.8 | 202.9 | Up | 09:56:22 - 10:08:44 | 5859 |
| Patrick | 10:02:17 | -26.0 | Dark | Up | 33.5 | 207.7 | Up | 09:56:06 - 10:08:28 | 5837 |
| Searchlight/Boulder City | 10:02:20 | -26.5 | Dark | Up | 33.8 | 206.6 | Up | 09:56:09 - 10:08:31 | 5828 |
| DCO | 10:02:14 | -25.9 | Dark | Up | 33.5 | 208.5 | Up | 09:56:03 - 10:08:25 | 5826 |
| Kingman/Dolan Springs | 10:02:16 | -26.3 | Dark | Up | 33.8 | 207.5 | Up | 09:56:05 - 10:08:27 | 5821 |
| Laughlin/Bullhead City | 10:02:18 | -26.6 | Dark | Up | 34.0 | 207.0 | Up | 09:56:07 - 10:08:29 | 5813 |
| Mohave Valley | 10:02:18 | -26.8 | Dark | Up | 34.2 | 207.1 | Up | 09:56:07 - 10:08:29 | 5796 |
| Lake Havasu City | 10:02:16 | -27.0 | Dark | Up | 34.5 | 207.5 | Up | 09:56:05 - 10:08:27 | 5774 |
| Parker | 10:02:15 | -27.2 | Dark | Up | 34.8 | 207.6 | Up | 09:56:04 - 10:08:26 | 5752 |
| CPSLO | 10:02:40 | -29.4 | Dark | Up | 35.8 | 200.4 | Up | 09:56:29 - 10:08:51 | 5742 |
| Blythe | 10:02:15 | -27.8 | Dark | Up | 35.4 | 207.5 | Up | 09:56:04 - 10:08:26 | 5715 |
| Idyllwild | 10:02:23 | -28.8 | Dark | Up | 36.0 | 205.2 | Up | 09:56:12 - 10:08:34 | 5698 |
| Wildwood | 10:02:30 | -29.4 | Dark | Up | 36.3 | 203.0 | Up | 09:56:19 - 10:08:41 | 5695 |
| Calipatria | 10:02:18 | -28.6 | Dark | Up | 36.1 | 206.6 | Up | 09:56:07 - 10:08:29 | 5672 |
| Yuma | 10:02:14 | -28.5 | Dark | Up | 36.2 | 207.7 | Up | 09:56:03 - 10:08:25 | 5655 |
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 469987, (2017/05/10 10:03UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:55 0.9 11.51 27 8Bet1Sco 16:05:26.2 -19:48:20 2.6 3.41 19 49 Lib 16:00:18.9 -16:32:07 5.5 1.17 17 PPM 231136 16:03:33.7 -16:24:08 8.2 0.38 17 PPM 231168 16:05:04.9 -16:37:54 9.3 0.24 18 PPM 231169 16:05:06.1 -16:09:43 10.1 0.23 18 469987 16:05:09.0 -16:23:28 16.2 18 Positions are for J2000
Event circumstances last updated at 2016/09/01 18:12:54 UT
Marc W. Buie, Southwest Research Institute