Event between (503858) 98HQ151 and star GA0780:19566571 with event index number of 2452596
Geocentric closest approach at 2024/08/01 04:28:38 UTC
J2000 position of star is 19:18:55.7 -11:16:36
Equinox of date position of star is 19:20:14.4 -11:13:54
Stellar brightness G=15.5,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 155 degrees from the moon.
Moon is 11% illuminated.
Apparent brightness V=24.1
[RECON map]
Object is 33.9 AU from the Sun
and 32.9 AU from the Earth.
Apparent velocity is 22.4
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 200 seconds.
The 1-sigma cross-track error in the shadow position is
1855 km.
The sky-plane scale is
23876.1 km/arcsec.
The object has an absolute magnitude Hv=8.8
Diameter=104.7 km assuming a 5% albedo -- 4.8 sec chord
Diameter=42.8 km assuming a 30% albedo -- 2.0 sec chord
Dynamical classification is 3:2E
Star training set for 503858, (2024/08/01 04:21UT) Object RA Dec mag sep mel Antares 16:30:55.1 -26:29:04 0.9 42.63 159 Nunki 18:56:47.3 -26:15:50 2.0 16.02 168 PPM 235666 19:14:37.9 -12:14:21 5.2 1.71 157 PPM 235755 19:18:14.1 -10:55:34 7.3 0.59 155 PPM 235809 19:19:58.7 -11:20:03 9.1 0.13 155 503858 19:20:17.4 -11:13:48 15.5 155 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
4.5 sigma about the mid-time.
The median site spacing is 35.1 km
RECON observability=0.3 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) |
| Kamloops | 04:29:25 | -6.4 | NT | Down | 21.9 | 145.4 | Low | 04:14:25 - 04:44:25 | 6864 |
| Sleaford | 04:28:43 | -11.7 | NT | Down | 24.7 | 160.3 | Low | 04:13:43 - 04:43:43 | 6833 |
| Kelowna | 04:29:25 | -7.4 | NT | Down | 22.9 | 146.1 | Low | 04:14:25 - 04:44:25 | 6823 |
| Peachland | 04:29:26 | -7.3 | NT | Down | 22.9 | 145.8 | Low | 04:14:26 - 04:44:26 | 6820 |
| Summerland | 04:29:26 | -7.4 | NT | Down | 23.0 | 145.9 | Low | 04:14:26 - 04:44:26 | 6812 |
| Penticton | 04:29:26 | -7.5 | NT | Down | 23.1 | 146.0 | Low | 04:14:26 - 04:44:26 | 6808 |
| Oliver | 04:29:27 | -7.8 | NT | Down | 23.4 | 145.9 | Low | 04:14:27 - 04:44:27 | 6792 |
| Anarchist Mountain Observatory | 04:29:28 | -8.0 | NT | Down | 23.7 | 146.0 | Low | 04:14:28 - 04:44:28 | 6783 |
| Victoria | 04:29:39 | -6.2 | NT | Down | 22.5 | 142.0 | Low | 04:14:39 - 04:44:39 | 6776 |
| Okanogan | 04:29:29 | -8.3 | NT | Down | 24.1 | 145.7 | Low | 04:14:29 - 04:44:29 | 6752 |
| Brewster | 04:29:31 | -8.3 | NT | Down | 24.3 | 145.4 | Low | 04:14:31 - 04:44:31 | 6740 |
| Manson/Chelan | 04:29:32 | -8.3 | NT | Down | 24.3 | 145.0 | Low | 04:14:32 - 04:44:32 | 6732 |
| Wenatchee | 04:29:34 | -8.5 | NT | Down | 24.6 | 144.7 | Low | 04:14:34 - 04:44:34 | 6709 |
| Ellensburg | 04:29:35 | -8.6 | NT | Down | 24.9 | 144.4 | Low | 04:14:35 - 04:44:35 | 6689 |
| Yakima | 04:29:36 | -8.9 | NT | Down | 25.2 | 144.3 | Low | 04:14:36 - 04:44:36 | 6668 |
| Toppenish/White Swan | 04:29:37 | -9.1 | NT | Down | 25.4 | 144.4 | Low | 04:14:37 - 04:44:37 | 6656 |
| PNWRO | 04:29:33 | -10.1 | NT | Down | 26.3 | 145.7 | Low | 04:14:33 - 04:44:33 | 6629 |
| The Dalles | 04:29:41 | -9.2 | NT | Down | 25.7 | 143.4 | Low | 04:14:41 - 04:44:41 | 6618 |
| Maupin | 04:29:41 | -9.5 | NT | Down | 26.1 | 143.4 | Low | 04:14:41 - 04:44:41 | 6595 |
| Sisters | 04:29:46 | -9.7 | NT | Down | 26.6 | 142.6 | Low | 04:14:46 - 04:44:46 | 6550 |
| Bend | 04:29:44 | -10.0 | NT | Down | 26.9 | 142.8 | Low | 04:14:44 - 04:44:44 | 6535 |
| Oregon Observatory | 04:29:45 | -10.1 | NT | Down | 27.0 | 142.6 | Low | 04:14:45 - 04:44:45 | 6526 |
| Chiloquin | 04:29:50 | -10.6 | NT | Down | 27.9 | 141.8 | Low | 04:14:50 - 04:44:50 | 6453 |
| Klamath Falls | 04:29:50 | -10.9 | NT | Down | 28.2 | 141.8 | Low | 04:14:50 - 04:44:50 | 6432 |
| Cedarville | 04:29:47 | -12.2 | AT | Down | 29.5 | 143.1 | Low | 04:14:47 - 04:44:47 | 6383 |
| Fall River/Burney | 04:29:52 | -11.8 | NT | Down | 29.3 | 141.8 | Low | 04:14:52 - 04:44:52 | 6359 |
| Greenville | 04:29:53 | -12.6 | AT | Down | 30.2 | 141.9 | Up | 04:14:53 - 04:44:53 | 6301 |
| Gimple | 04:29:52 | -12.7 | AT | Down | 30.3 | 142.0 | Up | 04:14:52 - 04:44:52 | 6301 |
| Quincy | 04:29:53 | -12.7 | AT | Down | 30.4 | 141.8 | Up | 04:14:53 - 04:44:53 | 6288 |
| Portola | 04:29:52 | -13.1 | AT | Down | 30.7 | 142.3 | Up | 04:14:52 - 04:44:52 | 6278 |
| Reno | 04:29:51 | -13.7 | AT | Down | 31.2 | 142.8 | Up | 04:14:51 - 04:44:51 | 6258 |
| Carson City | 04:29:51 | -13.9 | AT | Down | 31.5 | 142.7 | Up | 04:14:51 - 04:44:51 | 6235 |
| Gardnerville | 04:29:52 | -14.1 | AT | Down | 31.7 | 142.7 | Up | 04:14:52 - 04:44:52 | 6219 |
| Yerington | 04:29:49 | -14.4 | AT | Down | 32.0 | 143.3 | Up | 04:14:49 - 04:44:49 | 6219 |
| Hawthorne | 04:29:49 | -15.0 | AT | Down | 32.6 | 143.6 | Up | 04:14:49 - 04:44:49 | 6185 |
| Dunrhomin | 04:29:00 | -21.2 | Dark | Down | 36.0 | 158.8 | Up | 04:14:00 - 04:44:00 | 6181 |
| Nikitin | 04:29:00 | -21.3 | Dark | Down | 36.2 | 158.7 | Up | 04:14:00 - 04:44:00 | 6170 |
| CU-SBO | 04:29:01 | -21.4 | Dark | Down | 36.2 | 158.6 | Up | 04:14:01 - 04:44:01 | 6166 |
| Lee Vining | 04:29:52 | -15.1 | AT | Down | 32.8 | 142.9 | Up | 04:14:52 - 04:44:52 | 6152 |
| Bishop | 04:29:50 | -15.9 | AT | Down | 33.6 | 143.4 | Up | 04:14:50 - 04:44:50 | 6107 |
| Beatty | 04:29:46 | -17.2 | AT | Down | 34.8 | 144.9 | Up | 04:14:46 - 04:44:46 | 6065 |
| Patrick | 04:29:39 | -19.9 | Dark | Down | 37.3 | 147.4 | Up | 04:14:39 - 04:44:39 | 5939 |
| Laughlin/Bullhead City | 04:29:42 | -19.6 | Dark | Down | 37.2 | 146.6 | Up | 04:14:42 - 04:44:42 | 5927 |
| Wildwood | 04:29:58 | -17.8 | AT | Down | 36.1 | 141.9 | Up | 04:14:58 - 04:44:58 | 5881 |
| Lake Havasu City | 04:29:43 | -20.2 | Dark | Down | 37.9 | 146.6 | Up | 04:14:43 - 04:44:43 | 5877 |
| Idyllwild | 04:29:53 | -19.2 | Dark | Down | 37.4 | 143.7 | Up | 04:14:53 - 04:44:53 | 5842 |
| George/Scottsdale | 04:29:35 | -22.3 | Dark | Down | 39.6 | 149.0 | Up | 04:14:35 - 04:44:35 | 5800 |
| Calipatria | 04:29:50 | -20.4 | Dark | Down | 38.4 | 144.7 | Up | 04:14:50 - 04:44:50 | 5788 |
| Yuma | 04:29:47 | -21.2 | Dark | Down | 39.2 | 145.4 | Up | 04:14:47 - 04:44:47 | 5748 |
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 503858, (2024/08/01 04:21UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 42.63 159 Nunki 18:55:15.9 -26:17:49 2.0 16.02 168 PPM 235666 19:13:15.6 -12:16:58 5.2 1.71 157 PPM 235755 19:16:52.5 -10:58:18 7.3 0.59 155 PPM 235809 19:18:36.9 -11:22:50 9.1 0.13 155 503858 19:18:55.7 -11:16:36 15.5 155 Positions are for J2000
Event circumstances last updated at 2023/09/03 03:05:02 UT
Marc W. Buie, Southwest Research Institute