Event between (85627) 98HP151 and star GA0640:18327412 with event index number of 2407555
Geocentric closest approach at 2025/08/17 05:40:35 UTC
J2000 position of star is 17:41:23.3 -24:09:43
Equinox of date position of star is 17:42:53.2 -24:10:21
Stellar brightness G=15.0,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 162 degrees from the moon.
Moon is 39% illuminated.
Apparent brightness V=23.4
[RECON map]
Object is 40.9 AU from the Sun
and 40.4 AU from the Earth.
Apparent velocity is 10.3
km/sec on the sky relative to the star, or,
1.3 arcsec/hr.
The 1-sigma error in the time of the event is 612 seconds.
The 1-sigma cross-track error in the shadow position is
1869 km.
The sky-plane scale is
29290.7 km/arcsec.
The object has an absolute magnitude Hv=7.2
Diameter=199.5 km assuming a 5% albedo -- 20.7 sec chord
Diameter=81.5 km assuming a 30% albedo -- 8.5 sec chord
Dynamical classification is CLASSICAL
Star training set for 85627, (2025/08/17 05:41UT) Object RA Dec mag sep mel Antares 16:30:59.0 -26:29:12 0.9 16.41 178 35Eta Oph 17:11:51.0 -15:45:17 2.6 11.14 164 PPM 267309 17:49:18.6 -22:29:06 6.1 2.23 160 PPM 267136 17:42:23.8 -23:50:51 8.2 0.35 162 PPM 267143 17:42:35.3 -24:00:57 9.4 0.18 162 85627 17:42:57.4 -24:10:23 15.0 161 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
1.5 sigma about the mid-time.
The median site spacing is 19.8 km
RECON observability=0.5 and success probability=2.2%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Kamloops | 05:38:25 | -18.4 | Dark | Down | 12.0 | 203.0 | Really Low | 05:23:25 - 05:53:25 | 3798 |
| Kelowna | 05:38:17 | -19.4 | Dark | Down | 12.6 | 203.8 | Really Low | 05:23:17 - 05:53:17 | 3765 |
| Peachland | 05:38:19 | -19.4 | Dark | Down | 12.7 | 203.6 | Really Low | 05:23:19 - 05:53:19 | 3765 |
| Summerland | 05:38:17 | -19.5 | Dark | Down | 12.9 | 203.7 | Really Low | 05:23:17 - 05:53:17 | 3759 |
| Penticton | 05:38:16 | -19.6 | Dark | Down | 12.9 | 203.8 | Really Low | 05:23:16 - 05:53:16 | 3756 |
| Victoria | 05:38:37 | -18.8 | Dark | Down | 14.8 | 200.5 | Really Low | 05:23:37 - 05:53:37 | 3753 |
| Oliver | 05:38:15 | -19.9 | Dark | Down | 13.2 | 203.8 | Really Low | 05:23:15 - 05:53:15 | 3744 |
| Anarchist Mountain Observatory | 05:38:14 | -20.1 | Dark | Down | 13.3 | 204.0 | Really Low | 05:23:14 - 05:53:14 | 3737 |
| Okanogan | 05:38:13 | -20.5 | Dark | Down | 14.0 | 203.9 | Really Low | 05:23:13 - 05:53:13 | 3717 |
| Brewster | 05:38:12 | -20.6 | Dark | Down | 14.3 | 203.7 | Really Low | 05:23:12 - 05:53:12 | 3709 |
| Manson/Chelan | 05:38:15 | -20.7 | Dark | Down | 14.6 | 203.4 | Really Low | 05:23:15 - 05:53:15 | 3705 |
| Wenatchee | 05:38:14 | -21.0 | Dark | Down | 15.0 | 203.3 | Really Low | 05:23:14 - 05:53:14 | 3690 |
| Sleaford | 05:37:11 | -21.7 | Dark | Up | 6.5 | 215.2 | Really Low | 05:22:11 - 05:52:11 | 3677 |
| Ellensburg | 05:38:15 | -21.2 | Dark | Down | 15.5 | 203.1 | Really Low | 05:23:15 - 05:53:15 | 3677 |
| Yakima | 05:38:14 | -21.5 | Dark | Down | 15.9 | 203.2 | Really Low | 05:23:14 - 05:53:14 | 3662 |
| Toppenish/White Swan | 05:38:10 | -21.7 | Dark | Down | 16.0 | 203.3 | Really Low | 05:23:10 - 05:53:10 | 3652 |
| The Dalles | 05:38:15 | -22.0 | Dark | Down | 16.9 | 202.7 | Really Low | 05:23:15 - 05:53:15 | 3629 |
| PNWRO | 05:38:00 | -22.6 | Dark | Down | 15.9 | 204.7 | Really Low | 05:23:00 - 05:53:00 | 3624 |
| Maupin | 05:38:12 | -22.4 | Dark | Down | 17.3 | 202.9 | Really Low | 05:23:12 - 05:53:12 | 3611 |
| Sisters | 05:38:12 | -22.8 | Dark | Down | 18.2 | 202.5 | Really Low | 05:23:12 - 05:53:12 | 3580 |
| Bend | 05:38:10 | -23.1 | Dark | Down | 18.4 | 202.8 | Really Low | 05:23:10 - 05:53:10 | 3568 |
| Oregon Observatory | 05:38:11 | -23.2 | Dark | Down | 18.6 | 202.7 | Really Low | 05:23:11 - 05:53:11 | 3562 |
| Chiloquin | 05:38:09 | -24.0 | Dark | Down | 19.9 | 202.5 | Really Low | 05:23:09 - 05:53:09 | 3509 |
| Klamath Falls | 05:38:07 | -24.3 | Dark | Down | 20.2 | 202.6 | Low | 05:23:07 - 05:53:07 | 3493 |
| Cedarville | 05:37:54 | -25.5 | Dark | Down | 20.4 | 204.1 | Low | 05:22:54 - 05:52:54 | 3446 |
| Fall River/Burney | 05:38:02 | -25.3 | Dark | Down | 21.2 | 203.1 | Low | 05:23:02 - 05:53:02 | 3434 |
| Greenville | 05:37:55 | -26.2 | Dark | Down | 21.9 | 203.6 | Low | 05:22:55 - 05:52:55 | 3387 |
| Gimple | 05:37:54 | -26.2 | Dark | Down | 21.9 | 203.7 | Low | 05:22:54 - 05:52:54 | 3386 |
| Quincy | 05:37:54 | -26.4 | Dark | Down | 22.1 | 203.6 | Low | 05:22:54 - 05:52:54 | 3377 |
| Portola | 05:37:51 | -26.7 | Dark | Down | 22.1 | 204.1 | Low | 05:22:51 - 05:52:51 | 3366 |
| Reno | 05:37:46 | -27.2 | Dark | Down | 22.1 | 204.7 | Low | 05:22:46 - 05:52:46 | 3346 |
| Carson City | 05:37:44 | -27.5 | Dark | Down | 22.4 | 204.8 | Low | 05:22:44 - 05:52:44 | 3328 |
| Gardnerville | 05:37:44 | -27.7 | Dark | Down | 22.6 | 204.9 | Low | 05:22:44 - 05:52:44 | 3315 |
| Yerington | 05:37:38 | -27.9 | Dark | Down | 22.4 | 205.4 | Low | 05:22:38 - 05:52:38 | 3311 |
| Hawthorne | 05:37:35 | -28.6 | Dark | Down | 22.6 | 206.0 | Low | 05:22:35 - 05:52:35 | 3282 |
| Lee Vining | 05:37:36 | -28.7 | Dark | Down | 23.3 | 205.6 | Low | 05:22:36 - 05:52:36 | 3258 |
| Bishop | 05:37:29 | -29.6 | Dark | Down | 23.6 | 206.4 | Low | 05:22:29 - 05:52:29 | 3217 |
| Dunrhomin | 05:36:07 | -32.6 | Dark | Down | 15.9 | 217.0 | Really Low | 05:21:07 - 05:51:07 | 3175 |
| Beatty | 05:37:14 | -30.7 | Dark | Down | 23.5 | 207.9 | Low | 05:22:14 - 05:52:14 | 3173 |
| Nikitin | 05:36:08 | -32.8 | Dark | Down | 16.0 | 217.0 | Really Low | 05:21:08 - 05:51:08 | 3166 |
| CU-SBO | 05:36:07 | -32.8 | Dark | Down | 16.1 | 217.0 | Really Low | 05:21:07 - 05:51:07 | 3164 |
| Patrick | 05:36:49 | -33.3 | Dark | Down | 23.7 | 210.7 | Low | 05:21:49 - 05:51:49 | 3050 |
| Laughlin/Bullhead City | 05:36:53 | -33.1 | Dark | Down | 24.2 | 210.2 | Low | 05:21:53 - 05:51:53 | 3045 |
| Wildwood | 05:37:20 | -31.9 | Dark | Down | 26.6 | 206.8 | Low | 05:22:20 - 05:52:20 | 3034 |
| Lake Havasu City | 05:36:48 | -33.8 | Dark | Down | 24.6 | 210.5 | Low | 05:21:48 - 05:51:48 | 3002 |
| Idyllwild | 05:37:05 | -33.2 | Dark | Down | 26.2 | 208.6 | Low | 05:22:05 - 05:52:05 | 2990 |
| Calipatria | 05:36:54 | -34.2 | Dark | Down | 26.3 | 209.8 | Low | 05:21:54 - 05:51:54 | 2936 |
| George/Scottsdale | 05:36:28 | -35.6 | Dark | Down | 24.3 | 212.8 | Low | 05:21:28 - 05:51:28 | 2919 |
| Yuma | 05:36:45 | -35.0 | Dark | Down | 26.3 | 210.7 | Low | 05:21:45 - 05:51:45 | 2897 |
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 85627, (2025/08/17 05:41UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 16.41 178 35Eta Oph 17:10:22.7 -15:43:29 2.6 11.14 164 PPM 267309 17:47:45.6 -22:28:40 6.1 2.23 160 PPM 267136 17:40:49.9 -23:50:10 8.2 0.35 162 PPM 267143 17:41:01.3 -24:00:16 9.4 0.18 162 85627 17:41:23.3 -24:09:43 15.0 162 Positions are for J2000
Event circumstances last updated at 2024/06/18 02:52:45 UT
Marc W. Buie, Southwest Research Institute