Event between (278361) 07JJ43 and star GA0640:16269188 with event index number of 2182146
Geocentric closest approach at 2025/06/07 08:46:19 UTC
J2000 position of star is 17:29:49.5 -25:20:05
Equinox of date position of star is 17:31:19.0 -25:21:07
Stellar brightness G=15.1,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 50 degrees from the moon.
Moon is 86% illuminated.
Apparent brightness V=20.6
[RECON map]
Object is 40.6 AU from the Sun
and 39.6 AU from the Earth.
Apparent velocity is 24.2
km/sec on the sky relative to the star, or,
3.0 arcsec/hr.
The 1-sigma error in the time of the event is 301 seconds.
The 1-sigma cross-track error in the shadow position is
2106 km.
The sky-plane scale is
28707.5 km/arcsec.
The object has an absolute magnitude Hv=4.5
Diameter=758.6 km assuming a 5% albedo -- 31.5 sec chord
Diameter=309.7 km assuming a 30% albedo -- 12.8 sec chord
Dynamical classification is SCATNEAR
Star training set for 278361, (2025/06/07 08:34UT) Object RA Dec mag sep mel Antares 16:30:58.3 -26:29:10 0.9 13.63 37 35Eta Oph 17:11:50.3 -15:45:17 2.6 10.63 46 PPM 266967 17:33:19.2 -26:17:12 6.3 1.03 51 PPM 266914 17:30:13.1 -25:31:47 7.4 0.32 50 278361 17:31:23.7 -25:21:10 15.1 50 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
3.0 sigma about the mid-time.
The median site spacing is 14.3 km
RECON observability=0.6 and success probability=4.0%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Sleaford | 08:45:50 | -11.8 | NT | Down | 10.8 | 197.5 | Really Low | 08:30:50 - 09:00:50 | 3448 |
| Kamloops | 08:46:29 | -15.8 | AT | Up | 13.9 | 184.5 | Really Low | 08:31:29 - 09:01:29 | 3413 |
| Kelowna | 08:46:26 | -16.5 | AT | Up | 14.6 | 185.3 | Really Low | 08:31:26 - 09:01:26 | 3394 |
| Peachland | 08:46:26 | -16.7 | AT | Up | 14.8 | 185.0 | Really Low | 08:31:26 - 09:01:26 | 3390 |
| Summerland | 08:46:26 | -16.8 | AT | Up | 14.9 | 185.1 | Really Low | 08:31:26 - 09:01:26 | 3387 |
| Penticton | 08:46:26 | -16.8 | AT | Up | 15.0 | 185.2 | Really Low | 08:31:26 - 09:01:26 | 3385 |
| Oliver | 08:46:26 | -17.2 | AT | Up | 15.3 | 185.2 | Really Low | 08:31:26 - 09:01:26 | 3375 |
| Anarchist Mountain Observatory | 08:46:25 | -17.3 | AT | Up | 15.5 | 185.4 | Really Low | 08:31:25 - 09:01:25 | 3371 |
| Okanogan | 08:46:25 | -18.0 | AT | Up | 16.1 | 185.2 | Really Low | 08:31:25 - 09:01:25 | 3350 |
| Brewster | 08:46:26 | -18.3 | Dark | Up | 16.4 | 185.1 | Really Low | 08:31:26 - 09:01:26 | 3341 |
| Victoria | 08:46:36 | -18.3 | Dark | Up | 16.1 | 181.7 | Really Low | 08:31:36 - 09:01:36 | 3338 |
| Manson/Chelan | 08:46:27 | -18.5 | Dark | Up | 16.6 | 184.7 | Really Low | 08:31:27 - 09:01:27 | 3333 |
| Wenatchee | 08:46:27 | -19.0 | Dark | Up | 17.1 | 184.6 | Really Low | 08:31:27 - 09:01:27 | 3318 |
| Ellensburg | 08:46:28 | -19.5 | Dark | Up | 17.5 | 184.4 | Really Low | 08:31:28 - 09:01:28 | 3303 |
| Yakima | 08:46:28 | -19.9 | Dark | Up | 18.0 | 184.4 | Really Low | 08:31:28 - 09:01:28 | 3289 |
| Toppenish/White Swan | 08:46:28 | -20.1 | Dark | Up | 18.2 | 184.5 | Really Low | 08:31:28 - 09:01:28 | 3283 |
| PNWRO | 08:46:22 | -20.2 | Dark | Up | 18.4 | 186.0 | Really Low | 08:31:22 - 09:01:22 | 3276 |
| The Dalles | 08:46:29 | -20.9 | Dark | Up | 19.0 | 183.8 | Really Low | 08:31:29 - 09:01:29 | 3252 |
| Maupin | 08:46:29 | -21.3 | Dark | Up | 19.4 | 183.9 | Really Low | 08:31:29 - 09:01:29 | 3237 |
| Sisters | 08:46:30 | -22.3 | Dark | Up | 20.3 | 183.5 | Low | 08:31:30 - 09:01:30 | 3203 |
| Bend | 08:46:29 | -22.5 | Dark | Up | 20.5 | 183.7 | Low | 08:31:29 - 09:01:29 | 3195 |
| Oregon Observatory | 08:46:30 | -22.6 | Dark | Up | 20.7 | 183.6 | Low | 08:31:30 - 09:01:30 | 3188 |
| Chiloquin | 08:46:31 | -24.0 | Dark | Up | 22.0 | 183.2 | Low | 08:31:31 - 09:01:31 | 3133 |
| Klamath Falls | 08:46:30 | -24.3 | Dark | Up | 22.4 | 183.3 | Low | 08:31:30 - 09:01:30 | 3119 |
| Cedarville | 08:46:24 | -24.8 | Dark | Up | 23.0 | 184.9 | Low | 08:31:24 - 09:01:24 | 3097 |
| Fall River/Burney | 08:46:29 | -25.4 | Dark | Up | 23.5 | 183.7 | Low | 08:31:29 - 09:01:29 | 3070 |
| Dunrhomin | 08:45:33 | -22.3 | Dark | Up | 21.9 | 199.2 | Low | 08:30:33 - 09:00:33 | 3036 |
| Gimple | 08:46:26 | -26.2 | Dark | Up | 24.4 | 184.3 | Low | 08:31:26 - 09:01:26 | 3032 |
| Greenville | 08:46:27 | -26.2 | Dark | Up | 24.4 | 184.2 | Low | 08:31:27 - 09:01:27 | 3032 |
| Nikitin | 08:45:33 | -22.5 | Dark | Up | 22.1 | 199.2 | Low | 08:30:33 - 09:00:33 | 3028 |
| CU-SBO | 08:45:33 | -22.6 | Dark | Up | 22.1 | 199.2 | Low | 08:30:33 - 09:00:33 | 3026 |
| Quincy | 08:46:26 | -26.4 | Dark | Up | 24.6 | 184.2 | Low | 08:31:26 - 09:01:26 | 3023 |
| Portola | 08:46:25 | -26.5 | Dark | Up | 24.7 | 184.7 | Low | 08:31:25 - 09:01:25 | 3019 |
| Reno | 08:46:22 | -26.7 | Dark | Up | 24.9 | 185.3 | Low | 08:31:22 - 09:01:22 | 3010 |
| Carson City | 08:46:22 | -27.0 | Dark | Up | 25.3 | 185.3 | Low | 08:31:22 - 09:01:22 | 2993 |
| Yerington | 08:46:20 | -27.1 | Dark | Up | 25.4 | 186.0 | Low | 08:31:20 - 09:01:20 | 2986 |
| Gardnerville | 08:46:22 | -27.2 | Dark | Up | 25.5 | 185.4 | Low | 08:31:22 - 09:01:22 | 2982 |
| Hawthorne | 08:46:18 | -27.4 | Dark | Up | 25.8 | 186.5 | Low | 08:31:18 - 09:01:18 | 2966 |
| Lee Vining | 08:46:19 | -28.1 | Dark | Up | 26.5 | 186.1 | Low | 08:31:19 - 09:01:19 | 2937 |
| Bishop | 08:46:16 | -28.5 | Dark | Up | 27.0 | 186.8 | Low | 08:31:16 - 09:01:16 | 2910 |
| Beatty | 08:46:10 | -28.6 | Dark | Up | 27.3 | 188.5 | Low | 08:31:10 - 09:01:10 | 2891 |
| Patrick | 08:45:59 | -29.4 | Dark | Up | 28.3 | 191.5 | Low | 08:30:59 - 09:00:59 | 2817 |
| Laughlin/Bullhead City | 08:46:01 | -29.8 | Dark | Up | 28.7 | 190.8 | Low | 08:31:01 - 09:01:01 | 2803 |
| Lake Havasu City | 08:46:00 | -30.4 | Dark | Up | 29.3 | 191.1 | Low | 08:31:00 - 09:01:00 | 2767 |
| Wildwood | 08:46:16 | -31.7 | Dark | Up | 30.3 | 186.8 | Up | 08:31:16 - 09:01:16 | 2735 |
| George/Scottsdale | 08:45:50 | -30.4 | Dark | Up | 29.6 | 193.7 | Low | 08:30:50 - 09:00:50 | 2724 |
| Idyllwild | 08:46:08 | -31.7 | Dark | Up | 30.4 | 188.8 | Up | 08:31:08 - 09:01:08 | 2722 |
| Calipatria | 08:46:04 | -32.0 | Dark | Up | 30.8 | 190.0 | Up | 08:31:04 - 09:01:04 | 2688 |
| Yuma | 08:46:00 | -32.2 | Dark | Up | 31.1 | 191.0 | Up | 08:31:00 - 09:01:00 | 2664 |
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 278361, (2025/06/07 08:34UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 13.63 37 35Eta Oph 17:10:22.7 -15:43:29 2.6 10.63 46 PPM 266967 17:31:44.4 -26:16:11 6.3 1.03 51 PPM 266914 17:28:38.8 -25:30:39 7.4 0.32 50 278361 17:29:49.5 -25:20:05 15.1 50 Positions are for J2000
Event circumstances last updated at 2024/03/02 06:19:08 UT
Marc W. Buie, Southwest Research Institute