Event between (86177) 99RY215 and star GA1080:00026523 with event index number of 2408904
Geocentric closest approach at 2024/09/12 07:45:26 UTC
J2000 position of star is 00:13:23.4 +19:04:01
Equinox of date position of star is 00:14:31.1 +19:11:18
Stellar brightness G=15.4,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 99 degrees from the moon.
Moon is 61% illuminated.
TNO apparent brightness V=22.4
[RECON map]
TNO is 34.6 AU from the Sun
and 33.7 AU from the Earth.
The TNO is moving 22.8
km/sec on the sky relative to the star, or,
3.4 arcsec/hr.
The 1-sigma error in the time of the event is 81 seconds.
The 1-sigma cross-track error in the shadow position is
1689 km.
The sky-plane scale is
24408.0 km/arcsec.
The TNO has an absolute magnitude Hv=7.0
Diameter=237.7 km assuming a 5% albedo -- 10.4 sec chord
Diameter=97.0 km assuming a 30% albedo -- 4.3 sec chord
Dynamical classification is SCATNEAR
Star training set for 86177, (2024/09/12 07:45UT) Object RA Dec mag sep mel Deneb 20:42:16.5 +45:22:11 1.3 50.77 81 Algenib 00:14:30.7 +15:19:15 2.8 3.88 97 89Chi Peg 00:15:53.1 +20:20:38 4.8 1.18 100 PPM 116219 00:12:52.6 +19:02:53 8.4 0.45 99 PPM 116247 00:14:59.7 +18:46:22 8.7 0.44 99 86177 00:14:40.0 +19:12:15 15.4 100 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 24.4 km
RECON observability=1.0 and success probability=24.2%
| 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 | 07:45:37 | -35.8 | Dark | Down | 56.8 | 154.5 | Up | 07:38:25 - 07:52:50 | -610 |
| Kelowna | 07:45:38 | -36.2 | Dark | Down | 57.1 | 154.0 | Up | 07:38:26 - 07:52:51 | -641 |
| Peachland | 07:45:40 | -36.3 | Dark | Down | 57.1 | 153.5 | Up | 07:38:27 - 07:52:52 | -644 |
| Summerland | 07:45:39 | -36.4 | Dark | Down | 57.2 | 153.5 | Up | 07:38:27 - 07:52:52 | -659 |
| Penticton | 07:45:39 | -36.5 | Dark | Down | 57.3 | 153.7 | Up | 07:38:27 - 07:52:52 | -668 |
| Victoria | 07:45:52 | -37.3 | Dark | Down | 57.0 | 146.6 | Up | 07:38:40 - 07:53:05 | -669 |
| Oliver | 07:45:40 | -36.8 | Dark | Down | 57.7 | 153.4 | Up | 07:38:28 - 07:52:53 | -698 |
| Anarchist Mountain Observatory | 07:45:40 | -37.0 | Dark | Down | 57.9 | 153.6 | Up | 07:38:27 - 07:52:52 | -718 |
| Tonasket | 07:45:40 | -37.3 | Dark | Down | 58.1 | 153.3 | Up | 07:38:28 - 07:52:53 | -744 |
| Okanogan | 07:45:42 | -37.7 | Dark | Down | 58.4 | 152.8 | Up | 07:38:29 - 07:52:54 | -770 |
| Brewster | 07:45:43 | -37.9 | Dark | Down | 58.6 | 152.2 | Up | 07:38:30 - 07:52:55 | -790 |
| Manson/Chelan | 07:45:44 | -38.1 | Dark | Down | 58.6 | 151.5 | Up | 07:38:32 - 07:52:57 | -800 |
| Wenatchee | 07:45:46 | -38.6 | Dark | Down | 59.0 | 150.8 | Up | 07:38:33 - 07:52:58 | -838 |
| Ellensburg | 07:45:47 | -39.0 | Dark | Down | 59.3 | 150.1 | Up | 07:38:35 - 07:53:00 | -870 |
| Yakima | 07:45:48 | -39.4 | Dark | Down | 59.6 | 149.7 | Up | 07:38:35 - 07:53:00 | -906 |
| Toppenish/White Swan | 07:45:48 | -39.6 | Dark | Down | 59.9 | 149.8 | Up | 07:38:35 - 07:53:00 | -930 |
| Goldendale | 07:45:50 | -40.1 | Dark | Down | 60.2 | 148.6 | Up | 07:38:37 - 07:53:02 | -970 |
| Pasco | 07:45:44 | -39.8 | Dark | Down | 60.4 | 152.0 | Up | 07:38:31 - 07:52:56 | -971 |
| The Dalles | 07:45:52 | -40.3 | Dark | Down | 60.3 | 147.8 | Up | 07:38:39 - 07:53:04 | -982 |
| PNWRO | 07:45:44 | -40.0 | Dark | Down | 60.7 | 152.2 | Up | 07:38:31 - 07:52:56 | -998 |
| Maupin | 07:45:52 | -40.8 | Dark | Down | 60.7 | 147.6 | Up | 07:38:39 - 07:53:04 | -1022 |
| Sisters | 07:45:55 | -41.6 | Dark | Down | 61.2 | 145.8 | Up | 07:38:43 - 07:53:08 | -1090 |
| Redmond | 07:45:54 | -41.7 | Dark | Down | 61.4 | 146.5 | Up | 07:38:42 - 07:53:07 | -1103 |
| Bend | 07:45:55 | -41.9 | Dark | Down | 61.5 | 146.1 | Up | 07:38:42 - 07:53:07 | -1119 |
| Oregon Observatory | 07:45:56 | -42.0 | Dark | Down | 61.6 | 145.6 | Up | 07:38:43 - 07:53:08 | -1131 |
| La Pine/Gilchrist | 07:45:56 | -42.2 | Dark | Down | 61.7 | 145.3 | Up | 07:38:44 - 07:53:09 | -1149 |
| North Lake | 07:45:55 | -42.7 | Dark | Down | 62.3 | 146.0 | Up | 07:38:43 - 07:53:08 | -1204 |
| Chiloquin | 07:45:59 | -43.3 | Dark | Down | 62.5 | 143.5 | Up | 07:38:47 - 07:53:12 | -1243 |
| Paisley | 07:45:55 | -43.3 | Dark | Down | 62.9 | 146.0 | Up | 07:38:43 - 07:53:08 | -1265 |
| Klamath Falls | 07:46:00 | -43.7 | Dark | Down | 62.8 | 143.2 | Up | 07:38:47 - 07:53:12 | -1277 |
| Lakeview | 07:45:55 | -43.8 | Dark | Down | 63.4 | 145.8 | Up | 07:38:43 - 07:53:08 | -1317 |
| Cedarville | 07:45:56 | -44.5 | Dark | Down | 64.1 | 145.4 | Up | 07:38:44 - 07:53:09 | -1384 |
| Fall River/Burney | 07:46:01 | -44.9 | Dark | Down | 63.9 | 142.5 | Up | 07:38:49 - 07:53:14 | -1398 |
| Susanville | 07:46:00 | -45.5 | Dark | Down | 64.8 | 143.2 | Up | 07:38:47 - 07:53:12 | -1477 |
| Greenville | 07:46:01 | -45.8 | Dark | Down | 64.8 | 142.2 | Up | 07:38:49 - 07:53:14 | -1496 |
| Gimple | 07:46:01 | -45.8 | Dark | Down | 64.9 | 142.4 | Up | 07:38:48 - 07:53:13 | -1498 |
| Quincy | 07:46:02 | -46.0 | Dark | Down | 65.0 | 142.0 | Up | 07:38:49 - 07:53:14 | -1515 |
| Portola | 07:46:00 | -46.2 | Dark | Down | 65.3 | 142.7 | Up | 07:38:48 - 07:53:13 | -1540 |
| Reno | 07:45:58 | -46.5 | Dark | Down | 65.8 | 143.7 | Up | 07:38:46 - 07:53:11 | -1582 |
| Carson City | 07:45:59 | -46.8 | Dark | Down | 66.1 | 143.2 | Up | 07:38:46 - 07:53:11 | -1618 |
| Gardnerville | 07:45:59 | -47.1 | Dark | Down | 66.4 | 143.0 | Up | 07:38:47 - 07:53:12 | -1643 |
| Yerington | 07:45:57 | -47.0 | Dark | Down | 66.6 | 144.3 | Up | 07:38:45 - 07:53:10 | -1653 |
| Hawthorne | 07:45:56 | -47.5 | Dark | Down | 67.2 | 144.8 | Up | 07:38:43 - 07:53:08 | -1712 |
| Lee Vining | 07:45:59 | -48.1 | Dark | Down | 67.4 | 142.9 | Up | 07:38:46 - 07:53:11 | -1754 |
| Tonopah | 07:45:52 | -48.0 | Dark | Down | 68.2 | 147.2 | Up | 07:38:39 - 07:53:04 | -1794 |
| Bishop | 07:45:57 | -48.7 | Dark | Down | 68.3 | 143.6 | Up | 07:38:45 - 07:53:10 | -1832 |
| Dunrhomin | 07:45:06 | -44.4 | Dark | Down | 68.8 | 178.9 | Up | 07:37:53 - 07:52:18 | -1849 |
| Beatty | 07:45:52 | -49.2 | Dark | Down | 69.4 | 146.6 | Up | 07:38:40 - 07:53:05 | -1921 |
| CPSLO | 07:46:09 | -50.6 | Dark | Down | 68.7 | 135.5 | Up | 07:38:56 - 07:53:21 | -1975 |
| Indian Springs | 07:45:48 | -49.4 | Dark | Down | 70.1 | 148.8 | Up | 07:38:36 - 07:53:01 | -1981 |
| Henderson | 07:45:47 | -50.0 | Dark | Down | 70.9 | 149.7 | Up | 07:38:35 - 07:53:00 | -2052 |
| Patrick | 07:45:44 | -50.5 | Dark | Down | 71.8 | 151.8 | Up | 07:38:32 - 07:52:57 | -2143 |
| Laughlin/Bullhead City | 07:45:47 | -50.8 | Dark | Down | 71.8 | 149.5 | Up | 07:38:34 - 07:52:59 | -2150 |
| Wildwood | 07:46:04 | -51.9 | Dark | Down | 70.7 | 137.7 | Up | 07:38:51 - 07:53:16 | -2152 |
| Kingman/Dolan Springs | 07:45:45 | -50.7 | Dark | Down | 72.0 | 151.0 | Up | 07:38:32 - 07:52:57 | -2161 |
| Mohave Valley | 07:45:47 | -51.1 | Dark | Down | 72.0 | 149.1 | Up | 07:38:35 - 07:53:00 | -2178 |
| Lake Havasu City | 07:45:47 | -51.5 | Dark | Down | 72.5 | 149.2 | Up | 07:38:35 - 07:53:00 | -2225 |
| Idyllwild | 07:45:57 | -52.3 | Dark | Down | 72.0 | 141.5 | Up | 07:38:45 - 07:53:10 | -2239 |
| Parker | 07:45:47 | -51.8 | Dark | Down | 72.8 | 148.7 | Up | 07:38:35 - 07:53:00 | -2262 |
| Blythe | 07:45:49 | -52.3 | Dark | Down | 73.1 | 146.9 | Up | 07:38:37 - 07:53:02 | -2307 |
| Calipatria | 07:45:53 | -52.9 | Dark | Down | 73.1 | 143.4 | Up | 07:38:41 - 07:53:06 | -2333 |
| George/Scottsdale | 07:45:39 | -52.0 | Dark | Down | 74.1 | 155.3 | Up | 07:38:26 - 07:52:51 | -2366 |
| Yuma | 07:45:51 | -53.3 | Dark | Down | 73.8 | 145.1 | Up | 07:38:38 - 07:53:03 | -2401 |
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 86177, (2024/09/12 07:45UT) Object RA Dec mag sep mel Deneb 20:41:25.9 +45:16:49 1.3 50.77 81 Algenib 00:13:14.2 +15:11:01 2.8 3.88 97 89Chi Peg 00:14:36.3 +20:12:24 4.8 1.18 100 PPM 116219 00:11:36.1 +18:54:39 8.4 0.45 99 PPM 116247 00:13:43.0 +18:38:08 8.7 0.44 99 86177 00:13:23.4 +19:04:01 15.4 99 Positions are for J2000
Event circumstances last updated at 2021/10/29 23:12:33 UT
Marc W. Buie, Southwest Research Institute