Event between (503858) 98HQ151 and star GA0780:20128722 with event index number of 2452771
Geocentric closest approach at 2025/07/09 05:55:02 UTC
J2000 position of star is 19:28:46.4 -10:43:52
Equinox of date position of star is 19:30:04.7 -10:40:52
Stellar brightness G=13.6,
use SENSEUP=64 with the MallinCam and and exposure
time of 1 seconds with the QHY174 camera.
Star is 29 degrees from the moon.
Moon is 97% illuminated.
Apparent brightness V=24.1
[RECON map]
Object is 34.1 AU from the Sun
and 33.1 AU from the Earth.
Apparent velocity is 24.0
km/sec on the sky relative to the star, or,
3.6 arcsec/hr.
The 1-sigma error in the time of the event is 234 seconds.
The 1-sigma cross-track error in the shadow position is
1880 km.
The sky-plane scale is
24033.7 km/arcsec.
The object has an absolute magnitude Hv=8.8
Diameter=104.7 km assuming a 5% albedo -- 4.5 sec chord
Diameter=42.8 km assuming a 30% albedo -- 1.8 sec chord
Dynamical classification is 3:2E
Star training set for 503858, (2025/07/09 05:46UT) Object RA Dec mag sep mel Antares 16:30:58.6 -26:29:11 0.9 45.03 19 Nunki 18:56:50.7 -26:15:46 2.0 17.46 14 37 Aql 19:36:31.5 -10:30:10 4.7 1.57 30 PPM 236073 19:31:27.6 -10:53:32 8.2 0.38 29 PPM 236014 19:29:08.7 -10:34:47 9.5 0.27 29 503858 19:30:10.8 -10:40:38 13.6 29 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
3.8 sigma about the mid-time.
The median site spacing is 24.6 km
RECON observability=0.7 and success probability=2.9%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Sleaford | 05:55:37 | -13.9 | AT | Up | 24.4 | 156.4 | Low | 05:40:37 - 06:10:37 | 4682 |
| Kamloops | 05:56:16 | -11.5 | NT | Up | 21.1 | 141.7 | Low | 05:41:16 - 06:11:16 | 4622 |
| Kelowna | 05:56:15 | -12.5 | AT | Up | 22.1 | 142.4 | Low | 05:41:15 - 06:11:15 | 4582 |
| Peachland | 05:56:16 | -12.5 | AT | Up | 22.0 | 142.1 | Low | 05:41:16 - 06:11:16 | 4576 |
| Summerland | 05:56:17 | -12.7 | AT | Up | 22.2 | 142.1 | Low | 05:41:17 - 06:11:17 | 4568 |
| Penticton | 05:56:17 | -12.8 | AT | Up | 22.3 | 142.2 | Low | 05:41:17 - 06:11:17 | 4565 |
| Oliver | 05:56:18 | -13.1 | AT | Up | 22.6 | 142.1 | Low | 05:41:18 - 06:11:18 | 4546 |
| Anarchist Mountain Observatory | 05:56:18 | -13.3 | AT | Up | 22.8 | 142.3 | Low | 05:41:18 - 06:11:18 | 4538 |
| Victoria | 05:56:29 | -12.3 | AT | Up | 21.5 | 138.3 | Low | 05:41:29 - 06:11:29 | 4505 |
| Okanogan | 05:56:20 | -13.8 | AT | Up | 23.2 | 141.9 | Low | 05:41:20 - 06:11:20 | 4502 |
| Brewster | 05:56:21 | -14.0 | AT | Up | 23.3 | 141.6 | Low | 05:41:21 - 06:11:21 | 4487 |
| Manson/Chelan | 05:56:22 | -14.0 | AT | Up | 23.3 | 141.2 | Low | 05:41:22 - 06:11:22 | 4476 |
| Wenatchee | 05:56:24 | -14.4 | AT | Up | 23.6 | 140.9 | Low | 05:41:24 - 06:11:24 | 4449 |
| Ellensburg | 05:56:25 | -14.6 | AT | Up | 23.9 | 140.6 | Low | 05:41:25 - 06:11:25 | 4426 |
| Yakima | 05:56:26 | -15.0 | AT | Up | 24.2 | 140.5 | Low | 05:41:26 - 06:11:26 | 4402 |
| Toppenish/White Swan | 05:56:26 | -15.2 | AT | Up | 24.4 | 140.6 | Low | 05:41:26 - 06:11:26 | 4390 |
| PNWRO | 05:56:23 | -16.1 | AT | Up | 25.3 | 141.9 | Low | 05:41:23 - 06:11:23 | 4371 |
| The Dalles | 05:56:30 | -15.6 | AT | Up | 24.7 | 139.6 | Low | 05:41:30 - 06:11:30 | 4344 |
| Maupin | 05:56:30 | -16.0 | AT | Up | 25.0 | 139.6 | Low | 05:41:30 - 06:11:30 | 4319 |
| Sisters | 05:56:34 | -16.6 | AT | Up | 25.5 | 138.9 | Low | 05:41:34 - 06:11:34 | 4266 |
| Bend | 05:56:33 | -16.9 | AT | Up | 25.8 | 139.0 | Low | 05:41:33 - 06:11:33 | 4252 |
| Oregon Observatory | 05:56:34 | -17.0 | AT | Up | 25.8 | 138.8 | Low | 05:41:34 - 06:11:34 | 4241 |
| Chiloquin | 05:56:39 | -17.9 | AT | Up | 26.6 | 138.0 | Low | 05:41:39 - 06:11:39 | 4158 |
| Klamath Falls | 05:56:39 | -18.2 | Dark | Up | 26.9 | 138.0 | Low | 05:41:39 - 06:11:39 | 4136 |
| Cedarville | 05:56:36 | -19.5 | Dark | Up | 28.2 | 139.3 | Low | 05:41:36 - 06:11:36 | 4094 |
| Fall River/Burney | 05:56:41 | -19.4 | Dark | Up | 28.0 | 138.0 | Low | 05:41:41 - 06:11:41 | 4060 |
| Greenville | 05:56:41 | -20.3 | Dark | Up | 28.9 | 138.1 | Low | 05:41:41 - 06:11:41 | 4000 |
| Gimple | 05:56:41 | -20.4 | Dark | Up | 29.0 | 138.1 | Low | 05:41:41 - 06:11:41 | 4000 |
| Dunrhomin | 05:55:53 | -25.3 | Dark | Up | 35.4 | 154.4 | Up | 05:40:53 - 06:10:53 | 3995 |
| Quincy | 05:56:41 | -20.5 | Dark | Up | 29.1 | 138.0 | Low | 05:41:41 - 06:11:41 | 3987 |
| Nikitin | 05:55:53 | -25.5 | Dark | Up | 35.6 | 154.4 | Up | 05:40:53 - 06:10:53 | 3982 |
| Portola | 05:56:41 | -20.8 | Dark | Up | 29.4 | 138.4 | Low | 05:41:41 - 06:11:41 | 3979 |
| CU-SBO | 05:55:53 | -25.5 | Dark | Up | 35.6 | 154.3 | Up | 05:40:53 - 06:10:53 | 3978 |
| Reno | 05:56:39 | -21.3 | Dark | Up | 29.9 | 138.9 | Low | 05:41:39 - 06:11:39 | 3962 |
| Carson City | 05:56:40 | -21.6 | Dark | Up | 30.2 | 138.8 | Up | 05:41:40 - 06:11:40 | 3937 |
| Yerington | 05:56:38 | -22.0 | Dark | Up | 30.7 | 139.4 | Up | 05:41:38 - 06:11:38 | 3925 |
| Gardnerville | 05:56:41 | -21.8 | Dark | Up | 30.4 | 138.8 | Up | 05:41:41 - 06:11:41 | 3921 |
| Hawthorne | 05:56:38 | -22.7 | Dark | Up | 31.3 | 139.7 | Up | 05:41:38 - 06:11:38 | 3893 |
| Lee Vining | 05:56:41 | -22.9 | Dark | Up | 31.5 | 139.0 | Up | 05:41:41 - 06:11:41 | 3853 |
| Bishop | 05:56:39 | -23.7 | Dark | Up | 32.3 | 139.5 | Up | 05:41:39 - 06:11:39 | 3811 |
| Beatty | 05:56:35 | -24.8 | Dark | Up | 33.5 | 140.9 | Up | 05:41:35 - 06:11:35 | 3778 |
| Patrick | 05:56:28 | -27.2 | Dark | Up | 36.1 | 143.2 | Up | 05:41:28 - 06:11:28 | 3669 |
| Laughlin/Bullhead City | 05:56:31 | -27.2 | Dark | Up | 35.9 | 142.4 | Up | 05:41:31 - 06:11:31 | 3650 |
| Lake Havasu City | 05:56:32 | -27.9 | Dark | Up | 36.6 | 142.3 | Up | 05:41:32 - 06:11:32 | 3599 |
| Wildwood | 05:56:46 | -26.5 | Dark | Up | 34.7 | 137.9 | Up | 05:41:46 - 06:11:46 | 3569 |
| Idyllwild | 05:56:41 | -27.6 | Dark | Up | 36.0 | 139.6 | Up | 05:41:41 - 06:11:41 | 3543 |
| George/Scottsdale | 05:56:24 | -29.5 | Dark | Up | 38.4 | 144.6 | Up | 05:41:24 - 06:11:24 | 3538 |
| Calipatria | 05:56:38 | -28.6 | Dark | Up | 37.1 | 140.5 | Up | 05:41:38 - 06:11:38 | 3495 |
| Yuma | 05:56:36 | -29.3 | Dark | Up | 37.9 | 141.2 | Up | 05:41:36 - 06:11:36 | 3461 |
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, (2025/07/09 05:46UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 45.03 19 Nunki 18:55:15.9 -26:17:50 2.0 17.46 14 37 Aql 19:35:07.3 -10:33:37 4.7 1.57 30 PPM 236073 19:30:03.1 -10:56:49 8.2 0.38 29 PPM 236014 19:27:44.3 -10:38:00 9.5 0.27 29 503858 19:28:46.4 -10:43:52 13.6 29 Positions are for J2000
Event circumstances last updated at 2023/09/03 03:23:21 UT
Marc W. Buie, Southwest Research Institute