Event between (10370) Hylonome and star UC4-356-146112 with event index number of 73774
Geocentric closest approach at 2017/05/27 08:38:39 UTC
J2000 position of star is 18:29:54.3 -18:59:29
Equinox of date position of star is 18:30:54.1 -18:58:44
Stellar brightness R=14.5
Star is 171 degrees from the moon.
Moon is 4% illuminated.
TNO apparent brightness V=22.4
[RECON map]
TNO is 23.7 AU from the Sun
and 22.8 AU from the Earth.
The TNO is moving 19.0
km/sec on the sky relative to the star, or,
4.1 arcsec/hr.
The 1-sigma error in the time of the event is 939 seconds.
The 1-sigma cross-track error in the shadow position is
1881 km.
The sky-plane scale is
16538.5 km/arcsec.
The TNO has an absolute magnitude Hv=8.6
Diameter=114.8 km assuming a 5% albedo -- 6.0 sec chord
Diameter=46.9 km assuming a 30% albedo -- 2.5 sec chord
Dynamical classification is CENTAURR
Star training set for 10370, (2017/05/27 08:39UT) Object RA Dec mag sep mel Antares 16:30:28.6 -26:28:09 0.9 28.69 160 Nunki 18:56:20.6 -26:16:25 2.0 9.36 164 PPM 234623 18:31:13.2 -18:42:59 5.5 0.27 171 PPM 234645 18:32:20.2 -18:53:47 7.1 0.34 171 PPM 234598 18:30:06.8 -19:02:51 9.2 0.20 171 10370 18:30:55.7 -18:58:43 14.5 171 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
1.0 sigma about the mid-time.
The median site spacing is 12.8 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 | 08:39:47 | -19.0 | Dark | Down | 19.3 | 158.1 | Really Low | 08:24:47 - 08:54:47 | 8947 |
| Tonasket | 08:39:47 | -19.2 | Dark | Down | 19.6 | 158.1 | Really Low | 08:24:47 - 08:54:47 | 8937 |
| Okanogan | 08:40:03 | -19.6 | Dark | Down | 19.8 | 157.9 | Really Low | 08:25:03 - 08:55:03 | 8916 |
| Brewster | 08:40:04 | -19.9 | Dark | Down | 20.0 | 157.7 | Low | 08:25:04 - 08:55:04 | 8902 |
| Manson/Chelan | 08:40:06 | -20.1 | Dark | Down | 20.1 | 157.3 | Low | 08:25:06 - 08:55:06 | 8889 |
| Entiat | 08:40:06 | -20.3 | Dark | Down | 20.3 | 157.2 | Low | 08:25:06 - 08:55:06 | 8878 |
| Wenatchee | 08:40:07 | -20.6 | Dark | Down | 20.5 | 157.1 | Low | 08:25:07 - 08:55:07 | 8865 |
| Ellensburg | 08:40:09 | -21.0 | Dark | Down | 20.9 | 156.8 | Low | 08:25:09 - 08:55:09 | 8844 |
| Yakima | 08:40:09 | -21.4 | Dark | Down | 21.2 | 156.7 | Low | 08:25:09 - 08:55:09 | 8824 |
| Pasco | 08:40:05 | -21.6 | Dark | Down | 21.9 | 158.1 | Low | 08:25:05 - 08:55:05 | 8822 |
| Toppenish/White Swan | 08:40:10 | -21.6 | Dark | Down | 21.5 | 156.9 | Low | 08:25:10 - 08:55:10 | 8815 |
| PNWRO | 08:40:04 | -21.8 | Dark | Down | 22.2 | 158.3 | Low | 08:25:04 - 08:55:04 | 8812 |
| George/Umatilla | 08:40:06 | -21.9 | Dark | Down | 22.2 | 157.8 | Low | 08:25:06 - 08:55:06 | 8803 |
| Goldendale | 08:40:11 | -22.2 | Dark | Down | 21.9 | 156.4 | Low | 08:25:11 - 08:55:11 | 8784 |
| The Dalles | 08:40:13 | -22.5 | Dark | Down | 22.0 | 156.0 | Low | 08:25:13 - 08:55:13 | 8769 |
| Maupin | 08:40:13 | -22.9 | Dark | Down | 22.4 | 156.0 | Low | 08:25:13 - 08:55:13 | 8749 |
| Madras/Culver | 08:40:14 | -23.4 | Dark | Down | 22.9 | 155.9 | Low | 08:25:14 - 08:55:14 | 8721 |
| Redmond | 08:40:14 | -23.8 | Dark | Down | 23.2 | 155.8 | Low | 08:25:14 - 08:55:14 | 8703 |
| Sisters | 08:40:16 | -23.8 | Dark | Down | 23.1 | 155.4 | Low | 08:25:16 - 08:55:16 | 8700 |
| Bend | 08:40:15 | -24.0 | Dark | Down | 23.3 | 155.6 | Low | 08:25:15 - 08:55:15 | 8690 |
| Oregon Observatory | 08:40:16 | -24.2 | Dark | Down | 23.5 | 155.5 | Low | 08:25:16 - 08:55:16 | 8680 |
| La Pine/Gilchrist | 08:40:17 | -24.4 | Dark | Down | 23.6 | 155.4 | Low | 08:25:17 - 08:55:17 | 8668 |
| North Lake | 08:40:15 | -24.8 | Dark | Down | 24.2 | 155.9 | Low | 08:25:15 - 08:55:15 | 8651 |
| Paisley | 08:40:15 | -25.3 | Dark | Down | 24.8 | 156.1 | Low | 08:25:15 - 08:55:15 | 8625 |
| Chiloquin | 08:40:20 | -25.6 | Dark | Down | 24.5 | 154.8 | Low | 08:25:20 - 08:55:20 | 8604 |
| Lakeview | 08:40:15 | -25.7 | Dark | Down | 25.3 | 156.2 | Low | 08:25:15 - 08:55:15 | 8599 |
| Niwot | 08:39:15 | -24.2 | Dark | Down | 30.5 | 171.5 | Up | 08:24:15 - 08:54:15 | 8593 |
| Klamath Falls | 08:40:20 | -25.9 | Dark | Down | 24.9 | 154.8 | Low | 08:25:20 - 08:55:20 | 8586 |
| Tulelake | 08:40:19 | -26.1 | Dark | Down | 25.2 | 155.1 | Low | 08:25:19 - 08:55:19 | 8574 |
| Cedarville | 08:40:16 | -26.4 | Dark | Down | 26.0 | 156.3 | Low | 08:25:16 - 08:55:16 | 8564 |
| Fall River/Burney | 08:40:21 | -27.0 | Dark | Down | 26.1 | 155.0 | Low | 08:25:21 - 08:55:21 | 8523 |
| Susanville | 08:40:18 | -27.5 | Dark | Down | 26.9 | 155.6 | Low | 08:25:18 - 08:55:18 | 8495 |
| Gimple | 08:40:20 | -27.8 | Dark | Down | 27.1 | 155.3 | Low | 08:25:20 - 08:55:20 | 8476 |
| Greenville | 08:40:20 | -27.8 | Dark | Down | 27.0 | 155.2 | Low | 08:25:20 - 08:55:20 | 8476 |
| Quincy | 08:40:21 | -28.0 | Dark | Down | 27.2 | 155.2 | Low | 08:25:21 - 08:55:21 | 8464 |
| Portola | 08:40:19 | -28.1 | Dark | Down | 27.5 | 155.6 | Low | 08:25:19 - 08:55:19 | 8462 |
| Reno | 08:40:16 | -28.3 | Dark | Down | 27.9 | 156.2 | Low | 08:25:16 - 08:55:16 | 8453 |
| Carson City | 08:40:17 | -28.6 | Dark | Down | 28.3 | 156.2 | Low | 08:25:17 - 08:55:17 | 8432 |
| Yerington | 08:40:14 | -28.7 | Dark | Down | 28.6 | 156.8 | Low | 08:25:14 - 08:55:14 | 8426 |
| Gardnerville | 08:40:17 | -28.8 | Dark | Down | 28.5 | 156.2 | Low | 08:25:17 - 08:55:17 | 8417 |
| Hawthorne | 08:40:13 | -29.1 | Dark | Down | 29.2 | 157.2 | Low | 08:25:13 - 08:55:13 | 8403 |
| Tonopah | 08:40:08 | -29.2 | Dark | Down | 30.1 | 158.5 | Up | 08:25:08 - 08:55:08 | 8389 |
| Lee Vining | 08:40:15 | -29.7 | Dark | Down | 29.6 | 156.6 | Low | 08:25:15 - 08:55:15 | 8364 |
| Bishop | 08:40:14 | -30.1 | Dark | Down | 30.4 | 157.2 | Up | 08:25:14 - 08:55:14 | 8334 |
| Beatty | 08:40:08 | -30.3 | Dark | Down | 31.3 | 158.8 | Up | 08:25:08 - 08:55:08 | 8320 |
| Indian Springs | 08:40:03 | -30.4 | Dark | Down | 31.9 | 159.8 | Up | 08:25:03 - 08:55:03 | 8310 |
| Lone Pine | 08:40:13 | -30.8 | Dark | Down | 31.2 | 157.4 | Up | 08:25:13 - 08:55:13 | 8289 |
| Henderson | 08:39:47 | -30.7 | Dark | Down | 32.6 | 160.4 | Up | 08:24:47 - 08:54:47 | 8285 |
| Patrick | 08:39:47 | -31.0 | Dark | Down | 33.4 | 161.5 | Up | 08:24:47 - 08:54:47 | 8252 |
| Searchlight/Boulder City | 08:39:47 | -31.3 | Dark | Down | 33.1 | 160.3 | Up | 08:24:47 - 08:54:47 | 8249 |
| DCO | 08:39:47 | -31.2 | Dark | Down | 33.9 | 162.2 | Up | 08:24:47 - 08:54:47 | 8237 |
| Kingman/Dolan Springs | 08:39:47 | -31.3 | Dark | Down | 33.6 | 161.2 | Up | 08:24:47 - 08:54:47 | 8236 |
| Laughlin/Bullhead City | 08:39:47 | -31.5 | Dark | Down | 33.5 | 160.6 | Up | 08:24:47 - 08:54:47 | 8231 |
| Mohave Valley | 08:39:47 | -31.7 | Dark | Down | 33.7 | 160.6 | Up | 08:24:47 - 08:54:47 | 8213 |
| Lake Havasu City | 08:39:47 | -32.0 | Dark | Down | 34.2 | 160.8 | Up | 08:24:47 - 08:54:47 | 8188 |
| CPSLO | 08:40:25 | -32.5 | Dark | Down | 31.5 | 154.4 | Up | 08:25:25 - 08:55:25 | 8175 |
| Parker | 08:39:47 | -32.4 | Dark | Down | 34.5 | 160.7 | Up | 08:24:47 - 08:54:47 | 8165 |
| Blythe | 08:39:47 | -32.9 | Dark | Down | 34.9 | 160.3 | Up | 08:24:47 - 08:54:47 | 8128 |
| Wildwood | 08:40:18 | -33.4 | Dark | Down | 33.3 | 156.2 | Up | 08:25:18 - 08:55:18 | 8117 |
| Idyllwild | 08:40:10 | -33.3 | Dark | Down | 34.2 | 158.1 | Up | 08:25:10 - 08:55:10 | 8113 |
| Calipatria | 08:40:06 | -33.6 | Dark | Down | 35.2 | 159.2 | Up | 08:25:06 - 08:55:06 | 8081 |
| Yuma | 08:39:47 | -33.8 | Dark | Down | 35.8 | 160.0 | Up | 08:24:47 - 08:54:47 | 8064 |
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, (2017/05/27 08:39UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:55 0.9 28.69 160 Nunki 18:55:15.9 -26:17:49 2.0 9.36 164 PPM 234623 18:30:11.9 -18:43:45 5.5 0.27 171 PPM 234645 18:31:18.8 -18:54:36 7.1 0.34 171 PPM 234598 18:29:05.3 -19:03:36 9.2 0.20 171 10370 18:29:54.3 -18:59:29 14.5 171 Positions are for J2000
Event circumstances last updated at 2016/12/09 18:48:45 UT
Marc W. Buie, Southwest Research Institute