Event between (10370) Hylonome and star GDR2_278.508_-18.995 with event index number of 130817
Geocentric closest approach at 2018/08/07 06:48:40 UTC
J2000 position of star is 18:34:02.0 -18:59:41
Equinox of date position of star is 18:35:06.9 -18:58:46
Stellar brightness G=16.0,
use SENSEUP=128
Star is 159 degrees from the moon.
Moon is 23% illuminated.
TNO apparent brightness V=22.5
[RECON map]
TNO is 24.1 AU from the Sun
and 23.2 AU from the Earth.
The TNO is moving 17.5
km/sec on the sky relative to the star, or,
3.7 arcsec/hr.
The 1-sigma error in the time of the event is 1471 seconds.
The 1-sigma cross-track error in the shadow position is
1644 km.
The sky-plane scale is
16852.6 km/arcsec.
The TNO has an absolute magnitude Hv=8.6
Diameter=114.8 km assuming a 5% albedo -- 6.6 sec chord
Diameter=46.9 km assuming a 30% albedo -- 2.7 sec chord
Dynamical classification is CENTAURR
Star training set for 10370, (2018/08/07 06:49UT) Object RA Dec mag sep mel Antares 16:30:33.0 -26:28:18 0.9 29.60 169 Nunki 18:56:25.0 -26:16:19 2.0 8.79 154 PPM 234652 18:32:31.7 -18:23:18 5.0 0.85 160 PPM 234682 18:33:34.8 -18:57:28 7.2 0.37 160 PPM 234737 18:35:53.3 -19:16:00 9.3 0.34 159 10370 18:35:07.6 -18:58:45 16.0 159 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
0.6 sigma about the mid-time.
The median site spacing is 14.6 km
RECON observability=1.0 and success probability=17.8%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Oroville | 06:46:36 | -22.5 | Dark | Down | 19.9 | 199.6 | Really Low | 06:31:36 - 07:01:36 | 102 |
| Tonasket | 06:46:36 | -22.7 | Dark | Down | 20.1 | 199.6 | Low | 06:31:36 - 07:01:36 | 91 |
| Okanogan | 06:46:36 | -23.0 | Dark | Down | 20.5 | 199.5 | Low | 06:31:36 - 07:01:36 | 77 |
| Brewster | 06:46:36 | -23.2 | Dark | Down | 20.8 | 199.3 | Low | 06:31:36 - 07:01:36 | 68 |
| Manson/Chelan | 06:46:37 | -23.3 | Dark | Down | 21.0 | 199.0 | Low | 06:31:37 - 07:01:37 | 64 |
| Entiat | 06:46:37 | -23.5 | Dark | Down | 21.3 | 199.0 | Low | 06:31:37 - 07:01:37 | 55 |
| Wenatchee | 06:46:37 | -23.7 | Dark | Down | 21.5 | 198.9 | Low | 06:31:37 - 07:01:37 | 44 |
| Ellensburg | 06:46:38 | -24.0 | Dark | Down | 22.0 | 198.7 | Low | 06:31:38 - 07:01:38 | 28 |
| Yakima | 06:46:38 | -24.4 | Dark | Down | 22.4 | 198.8 | Low | 06:31:38 - 07:01:38 | 8 |
| Toppenish/White Swan | 06:46:37 | -24.6 | Dark | Down | 22.5 | 199.0 | Low | 06:31:37 - 07:01:37 | -7 |
| Goldendale | 06:46:38 | -25.0 | Dark | Down | 23.1 | 198.6 | Low | 06:31:38 - 07:01:38 | -27 |
| The Dalles | 06:46:39 | -25.1 | Dark | Down | 23.4 | 198.3 | Low | 06:31:39 - 07:01:39 | -32 |
| Pasco | 06:46:32 | -25.0 | Dark | Down | 22.3 | 200.2 | Low | 06:31:32 - 07:01:32 | -35 |
| George/Umatilla | 06:46:32 | -25.3 | Dark | Down | 22.7 | 200.0 | Low | 06:31:32 - 07:01:32 | -49 |
| PNWRO | 06:46:30 | -25.3 | Dark | Down | 22.5 | 200.5 | Low | 06:31:30 - 07:01:30 | -52 |
| Maupin | 06:46:38 | -25.6 | Dark | Down | 23.8 | 198.4 | Low | 06:31:38 - 07:01:38 | -56 |
| Madras/Culver | 06:46:38 | -26.1 | Dark | Down | 24.3 | 198.5 | Low | 06:31:38 - 07:01:38 | -84 |
| Sisters | 06:46:40 | -26.2 | Dark | Down | 24.8 | 198.1 | Low | 06:31:40 - 07:01:40 | -94 |
| Redmond | 06:46:38 | -26.4 | Dark | Down | 24.7 | 198.5 | Low | 06:31:38 - 07:01:38 | -102 |
| Bend | 06:46:38 | -26.5 | Dark | Down | 24.9 | 198.4 | Low | 06:31:38 - 07:01:38 | -111 |
| Oregon Observatory | 06:46:39 | -26.7 | Dark | Down | 25.1 | 198.3 | Low | 06:31:39 - 07:01:39 | -118 |
| La Pine/Gilchrist | 06:46:39 | -26.8 | Dark | Down | 25.3 | 198.2 | Low | 06:31:39 - 07:01:39 | -128 |
| North Lake | 06:46:36 | -27.4 | Dark | Down | 25.6 | 198.9 | Low | 06:31:36 - 07:01:36 | -163 |
| Chiloquin | 06:46:39 | -27.7 | Dark | Down | 26.5 | 198.0 | Low | 06:31:39 - 07:01:39 | -184 |
| Paisley | 06:46:34 | -28.0 | Dark | Down | 26.0 | 199.3 | Low | 06:31:34 - 07:01:34 | -201 |
| Klamath Falls | 06:46:39 | -28.1 | Dark | Down | 26.8 | 198.2 | Low | 06:31:39 - 07:01:39 | -205 |
| Tulelake | 06:46:37 | -28.4 | Dark | Down | 27.0 | 198.5 | Low | 06:31:37 - 07:01:37 | -226 |
| Lakeview | 06:46:33 | -28.5 | Dark | Down | 26.5 | 199.6 | Low | 06:31:33 - 07:01:33 | -234 |
| Cedarville | 06:46:31 | -29.2 | Dark | Down | 27.0 | 199.9 | Low | 06:31:31 - 07:01:31 | -275 |
| Fall River/Burney | 06:46:36 | -29.3 | Dark | Down | 27.8 | 198.7 | Low | 06:31:36 - 07:01:36 | -280 |
| Susanville | 06:46:32 | -30.1 | Dark | Down | 28.2 | 199.6 | Low | 06:31:32 - 07:01:32 | -332 |
| Greenville | 06:46:34 | -30.2 | Dark | Down | 28.5 | 199.4 | Low | 06:31:34 - 07:01:34 | -343 |
| Gimple | 06:46:33 | -30.3 | Dark | Down | 28.5 | 199.4 | Low | 06:31:33 - 07:01:33 | -345 |
| Quincy | 06:46:34 | -30.4 | Dark | Down | 28.7 | 199.4 | Low | 06:31:34 - 07:01:34 | -355 |
| Portola | 06:46:31 | -30.7 | Dark | Down | 28.7 | 199.9 | Low | 06:31:31 - 07:01:31 | -372 |
| Reno | 06:46:28 | -31.1 | Dark | Down | 28.8 | 200.6 | Low | 06:31:28 - 07:01:28 | -401 |
| Carson City | 06:46:27 | -31.5 | Dark | Down | 29.1 | 200.7 | Low | 06:31:27 - 07:01:27 | -424 |
| Gardnerville | 06:46:27 | -31.7 | Dark | Down | 29.4 | 200.8 | Low | 06:31:27 - 07:01:27 | -440 |
| Yerington | 06:46:25 | -31.8 | Dark | Down | 29.2 | 201.4 | Low | 06:31:25 - 07:01:25 | -449 |
| Hawthorne | 06:46:22 | -32.4 | Dark | Down | 29.4 | 202.0 | Low | 06:31:22 - 07:01:22 | -489 |
| Lee Vining | 06:46:23 | -32.8 | Dark | Down | 30.1 | 201.6 | Up | 06:31:23 - 07:01:23 | -515 |
| Tonopah | 06:46:15 | -33.2 | Dark | Down | 29.4 | 203.5 | Low | 06:31:15 - 07:01:15 | -549 |
| Bishop | 06:46:20 | -33.5 | Dark | Down | 30.4 | 202.5 | Up | 06:31:20 - 07:01:20 | -569 |
| Lone Pine | 06:46:18 | -34.3 | Dark | Down | 31.0 | 203.0 | Up | 06:31:18 - 07:01:18 | -626 |
| Beatty | 06:46:12 | -34.4 | Dark | Down | 30.4 | 204.3 | Up | 06:31:12 - 07:01:12 | -634 |
| CPSLO | 06:46:29 | -34.8 | Dark | Down | 33.0 | 200.6 | Up | 06:31:29 - 07:01:29 | -659 |
| Indian Springs | 06:46:07 | -35.0 | Dark | Down | 30.3 | 205.4 | Up | 06:31:07 - 07:01:07 | -680 |
| Niwot | 06:45:28 | -33.3 | Dark | Down | 23.2 | 214.5 | Low | 06:30:28 - 07:00:28 | -692 |
| Henderson | 06:46:03 | -35.7 | Dark | Down | 30.5 | 206.3 | Up | 06:31:03 - 07:01:03 | -732 |
| Searchlight/Boulder City | 06:46:02 | -36.2 | Dark | Down | 31.0 | 206.5 | Up | 06:31:02 - 07:01:02 | -773 |
| Wildwood | 06:46:18 | -36.5 | Dark | Down | 33.5 | 203.1 | Up | 06:31:18 - 07:01:18 | -786 |
| Patrick | 06:45:57 | -36.5 | Dark | Down | 30.7 | 207.5 | Up | 06:30:57 - 07:00:57 | -801 |
| Laughlin/Bullhead City | 06:46:01 | -36.6 | Dark | Down | 31.2 | 206.9 | Up | 06:31:01 - 07:01:01 | -801 |
| Kingman/Dolan Springs | 06:45:58 | -36.7 | Dark | Down | 31.0 | 207.4 | Up | 06:30:58 - 07:00:58 | -812 |
| Mohave Valley | 06:46:00 | -36.9 | Dark | Down | 31.4 | 207.0 | Up | 06:31:00 - 07:01:00 | -820 |
| DCO | 06:45:54 | -37.0 | Dark | Down | 30.7 | 208.3 | Up | 06:30:54 - 07:00:54 | -839 |
| Idyllwild | 06:46:09 | -37.4 | Dark | Down | 33.2 | 205.1 | Up | 06:31:09 - 07:01:09 | -853 |
| Lake Havasu City | 06:45:59 | -37.3 | Dark | Down | 31.7 | 207.3 | Up | 06:30:59 - 07:00:59 | -854 |
| Parker | 06:45:58 | -37.7 | Dark | Down | 32.0 | 207.5 | Up | 06:30:58 - 07:00:58 | -880 |
| Blythe | 06:45:59 | -38.1 | Dark | Down | 32.6 | 207.3 | Up | 06:30:59 - 07:00:59 | -911 |
| Calipatria | 06:46:03 | -38.3 | Dark | Down | 33.4 | 206.5 | Up | 06:31:03 - 07:01:03 | -924 |
| Yuma | 06:45:58 | -39.0 | Dark | Down | 33.4 | 207.6 | Up | 06:30:58 - 07:00:58 | -977 |
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 10370, (2018/08/07 06:49UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 29.60 169 Nunki 18:55:15.9 -26:17:49 2.0 8.79 154 PPM 234652 18:31:26.3 -18:24:10 5.0 0.85 160 PPM 234682 18:32:29.2 -18:58:22 7.2 0.37 160 PPM 234737 18:34:47.6 -19:16:58 9.3 0.34 159 10370 18:34:02.0 -18:59:41 16.0 159 Positions are for J2000
Event circumstances last updated at 2018/05/24 17:55:25 UT
Marc W. Buie, Southwest Research Institute