Event between (10370) Hylonome and star GA0700:32833845 with event index number of 1089663
Geocentric closest approach at 2021/06/11 08:18:14 UTC
J2000 position of star is 19:19:38.1 -18:05:31
Equinox of date position of star is 19:20:52.7 -18:03:04
Stellar brightness G=14.8,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 161 degrees from the moon.
Moon is 1% illuminated.
TNO apparent brightness V=22.6
[RECON map]
TNO is 25.0 AU from the Sun
and 24.1 AU from the Earth.
The TNO is moving 19.9
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 1894 seconds.
The 1-sigma cross-track error in the shadow position is
4763 km.
The sky-plane scale is
17448.6 km/arcsec.
The TNO has an absolute magnitude Hv=8.6
Diameter=114.8 km assuming a 5% albedo -- 5.8 sec chord
Diameter=46.9 km assuming a 30% albedo -- 2.4 sec chord
Dynamical classification is CENTAURR
Star training set for 10370, (2021/06/11 08:18UT) Object RA Dec mag sep mel Antares 16:30:43.5 -26:28:40 0.9 40.07 159 Nunki 18:56:35.6 -26:16:06 2.0 9.95 168 44Rho1Sgr 19:22:54.9 -17:48:19 4.0 0.54 160 PPM 235789 19:19:23.4 -18:10:05 8.5 0.37 161 PPM 235823 19:20:14.0 -17:53:15 8.9 0.22 161 10370 19:20:52.8 -18:03:04 14.8 160 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
0.5 sigma about the mid-time.
The median site spacing is 15.2 km
RECON observability=0.8 and success probability=4.2%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Clarence Fulton | 08:19:11 | -16.5 | AT | Down | 18.3 | 155.4 | Really Low | 08:04:11 - 08:34:11 | 4808 |
| Kelowna | 08:19:12 | -16.9 | AT | Down | 18.6 | 155.2 | Really Low | 08:04:12 - 08:34:12 | 4791 |
| Peachland | 08:19:14 | -17.0 | AT | Down | 18.7 | 154.9 | Really Low | 08:04:14 - 08:34:14 | 4786 |
| Summerland | 08:19:14 | -17.1 | AT | Down | 18.8 | 155.0 | Really Low | 08:04:14 - 08:34:14 | 4780 |
| Penticton | 08:19:14 | -17.2 | AT | Down | 18.9 | 155.1 | Really Low | 08:04:14 - 08:34:14 | 4778 |
| Oliver | 08:19:15 | -17.6 | AT | Down | 19.2 | 155.1 | Really Low | 08:04:15 - 08:34:15 | 4763 |
| Anarchist Mountain Observatory | 08:19:14 | -17.7 | AT | Down | 19.4 | 155.2 | Really Low | 08:04:14 - 08:34:14 | 4757 |
| Tonasket | 08:19:15 | -18.0 | Dark | Down | 19.7 | 155.1 | Really Low | 08:04:15 - 08:34:15 | 4743 |
| Okanogan | 08:19:16 | -18.4 | Dark | Down | 20.0 | 154.9 | Really Low | 08:04:16 - 08:34:16 | 4728 |
| Victoria | 08:19:23 | -18.4 | Dark | Down | 18.7 | 151.3 | Really Low | 08:04:23 - 08:34:23 | 4721 |
| Brewster | 08:19:17 | -18.7 | Dark | Down | 20.1 | 154.7 | Low | 08:04:17 - 08:34:17 | 4716 |
| Manson/Chelan | 08:19:19 | -18.9 | Dark | Down | 20.2 | 154.3 | Low | 08:04:19 - 08:34:19 | 4705 |
| Wenatchee | 08:19:20 | -19.4 | Dark | Down | 20.6 | 154.1 | Low | 08:04:20 - 08:34:20 | 4683 |
| Ellensburg | 08:19:22 | -19.8 | Dark | Down | 20.9 | 153.8 | Low | 08:04:22 - 08:34:22 | 4664 |
| Yakima | 08:19:23 | -20.2 | Dark | Down | 21.3 | 153.7 | Low | 08:04:23 - 08:34:23 | 4645 |
| Toppenish/White Swan | 08:19:23 | -20.4 | Dark | Down | 21.5 | 153.8 | Low | 08:04:23 - 08:34:23 | 4635 |
| Pasco | 08:19:19 | -20.4 | Dark | Down | 22.0 | 155.0 | Low | 08:04:19 - 08:34:19 | 4634 |
| PNWRO | 08:19:19 | -20.7 | Dark | Down | 22.3 | 155.2 | Low | 08:04:19 - 08:34:19 | 4623 |
| Goldendale | 08:19:23 | -21.0 | Dark | Down | 21.9 | 153.3 | Low | 08:04:23 - 08:34:23 | 4608 |
| The Dalles | 08:19:23 | -21.2 | Dark | Down | 22.0 | 152.9 | Low | 08:04:23 - 08:34:23 | 4596 |
| Maupin | 08:19:23 | -21.6 | Dark | Down | 22.4 | 153.0 | Low | 08:04:23 - 08:34:23 | 4577 |
| Sisters | 08:19:23 | -22.5 | Dark | Down | 23.0 | 152.3 | Low | 08:04:23 - 08:34:23 | 4533 |
| Redmond | 08:19:23 | -22.5 | Dark | Down | 23.2 | 152.7 | Low | 08:04:23 - 08:34:23 | 4533 |
| Bend | 08:19:23 | -22.8 | Dark | Down | 23.3 | 152.5 | Low | 08:04:23 - 08:34:23 | 4522 |
| Oregon Observatory | 08:19:23 | -22.9 | Dark | Down | 23.4 | 152.4 | Low | 08:04:23 - 08:34:23 | 4513 |
| La Pine/Gilchrist | 08:19:23 | -23.1 | Dark | Down | 23.6 | 152.3 | Low | 08:04:23 - 08:34:23 | 4503 |
| North Lake | 08:19:23 | -23.5 | Dark | Down | 24.2 | 152.8 | Low | 08:04:23 - 08:34:23 | 4482 |
| Paisley | 08:19:23 | -24.1 | Dark | Down | 24.8 | 153.0 | Low | 08:04:23 - 08:34:23 | 4454 |
| Chiloquin | 08:19:23 | -24.3 | Dark | Down | 24.4 | 151.7 | Low | 08:04:23 - 08:34:23 | 4447 |
| Klamath Falls | 08:19:23 | -24.6 | Dark | Down | 24.8 | 151.7 | Low | 08:04:23 - 08:34:23 | 4429 |
| Lakeview | 08:19:23 | -24.6 | Dark | Down | 25.3 | 153.1 | Low | 08:04:23 - 08:34:23 | 4428 |
| Cedarville | 08:19:23 | -25.2 | Dark | Down | 25.9 | 153.1 | Low | 08:04:23 - 08:34:23 | 4393 |
| Fall River/Burney | 08:19:23 | -25.8 | Dark | Down | 25.9 | 151.8 | Low | 08:04:23 - 08:34:23 | 4367 |
| Susanville | 08:19:23 | -26.4 | Dark | Down | 26.8 | 152.4 | Low | 08:04:23 - 08:34:23 | 4333 |
| Dunrhomin | 08:18:34 | -24.1 | Dark | Down | 30.8 | 168.3 | Up | 08:03:34 - 08:33:34 | 4326 |
| Greenville | 08:19:23 | -26.6 | Dark | Down | 26.9 | 152.0 | Low | 08:04:23 - 08:34:23 | 4318 |
| Gimple | 08:19:23 | -26.6 | Dark | Down | 26.9 | 152.1 | Low | 08:04:23 - 08:34:23 | 4317 |
| Quincy | 08:19:23 | -26.8 | Dark | Down | 27.1 | 152.0 | Low | 08:04:23 - 08:34:23 | 4306 |
| Portola | 08:19:23 | -26.9 | Dark | Down | 27.4 | 152.4 | Low | 08:04:23 - 08:34:23 | 4300 |
| Reno | 08:19:23 | -27.2 | Dark | Down | 27.8 | 153.0 | Low | 08:04:23 - 08:34:23 | 4284 |
| Carson City | 08:19:23 | -27.5 | Dark | Down | 28.1 | 152.9 | Low | 08:04:23 - 08:34:23 | 4264 |
| Yerington | 08:19:23 | -27.7 | Dark | Down | 28.5 | 153.5 | Low | 08:04:23 - 08:34:23 | 4253 |
| Gardnerville | 08:19:23 | -27.8 | Dark | Down | 28.4 | 152.9 | Low | 08:04:23 - 08:34:23 | 4250 |
| Hawthorne | 08:19:23 | -28.1 | Dark | Down | 29.1 | 154.0 | Low | 08:04:23 - 08:34:23 | 4226 |
| Tonopah | 08:19:23 | -28.4 | Dark | Down | 30.0 | 155.3 | Up | 08:04:23 - 08:34:23 | 4200 |
| Lee Vining | 08:19:23 | -28.7 | Dark | Down | 29.5 | 153.3 | Low | 08:04:23 - 08:34:23 | 4193 |
| Bishop | 08:19:23 | -29.2 | Dark | Down | 30.3 | 153.9 | Up | 08:04:23 - 08:34:23 | 4156 |
| Beatty | 08:19:23 | -29.5 | Dark | Down | 31.2 | 155.5 | Up | 08:04:23 - 08:34:23 | 4129 |
| Indian Springs | 08:19:22 | -29.7 | Dark | Down | 31.9 | 156.5 | Up | 08:04:22 - 08:34:22 | 4110 |
| Henderson | 08:19:20 | -30.1 | Dark | Down | 32.6 | 157.1 | Up | 08:04:20 - 08:34:20 | 4077 |
| Patrick | 08:19:16 | -30.6 | Dark | Down | 33.5 | 158.1 | Up | 08:04:16 - 08:34:16 | 4039 |
| Kingman/Dolan Springs | 08:19:17 | -30.8 | Dark | Down | 33.7 | 157.9 | Up | 08:04:17 - 08:34:17 | 4024 |
| Laughlin/Bullhead City | 08:19:19 | -30.9 | Dark | Down | 33.5 | 157.3 | Up | 08:04:19 - 08:34:19 | 4021 |
| CPSLO | 08:19:45 | -31.4 | Dark | Down | 31.3 | 151.1 | Up | 08:04:45 - 08:34:45 | 4012 |
| Mohave Valley | 08:19:20 | -31.2 | Dark | Down | 33.8 | 157.3 | Up | 08:04:20 - 08:34:20 | 4003 |
| Lake Havasu City | 08:19:19 | -31.5 | Dark | Down | 34.2 | 157.4 | Up | 08:04:19 - 08:34:19 | 3977 |
| Parker | 08:19:19 | -31.9 | Dark | Down | 34.6 | 157.4 | Up | 08:04:19 - 08:34:19 | 3954 |
| Wildwood | 08:19:23 | -32.5 | Dark | Down | 33.1 | 152.8 | Up | 08:04:23 - 08:34:23 | 3952 |
| George/Scottsdale | 08:19:09 | -31.8 | Dark | Down | 35.7 | 159.9 | Up | 08:04:09 - 08:34:09 | 3927 |
| Idyllwild | 08:19:23 | -32.6 | Dark | Down | 34.1 | 154.7 | Up | 08:04:23 - 08:34:23 | 3926 |
| Blythe | 08:19:21 | -32.4 | Dark | Down | 35.0 | 156.9 | Up | 08:04:21 - 08:34:21 | 3918 |
| Calipatria | 08:19:23 | -33.1 | Dark | Down | 35.1 | 155.8 | Up | 08:04:23 - 08:34:23 | 3883 |
| Yuma | 08:19:22 | -33.3 | Dark | Down | 35.8 | 156.6 | Up | 08:04:22 - 08:34:22 | 3855 |
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, (2021/06/11 08:18UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 40.07 159 Nunki 18:55:15.9 -26:17:49 2.0 9.95 168 44Rho1Sgr 19:21:40.3 -17:50:50 4.0 0.54 160 PPM 235789 19:18:08.6 -18:12:30 8.5 0.37 161 PPM 235823 19:18:59.4 -17:55:41 8.9 0.22 161 10370 19:19:38.1 -18:05:31 14.8 161 Positions are for J2000
Event circumstances last updated at 2021/06/02 01:31:35 UT
Marc W. Buie, Southwest Research Institute