Event between (5145) Pholus and star GA0740:21849664 with event index number of 1402402
Geocentric closest approach at 2025/06/27 10:36:39 UTC
J2000 position of star is 18:40:13.5 -14:01:10
Equinox of date position of star is 18:41:36.7 -13:59:43
Stellar brightness G=16.0,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 154 degrees from the moon.
Moon is 5% illuminated.
Apparent brightness V=21.9
[RECON map]
Object is 30.3 AU from the Sun
and 29.3 AU from the Earth.
Apparent velocity is 25.9
km/sec on the sky relative to the star, or,
4.4 arcsec/hr.
The 1-sigma error in the time of the event is 112 seconds.
The 1-sigma cross-track error in the shadow position is
1479 km.
The sky-plane scale is
21274.8 km/arcsec.
The object has an absolute magnitude Hv=7.1
Diameter=229.1 km assuming a 5% albedo -- 9.0 sec chord
Diameter=93.5 km assuming a 30% albedo -- 3.7 sec chord
Dynamical classification is CENTAURR
Star training set for 5145, (2025/06/27 10:37UT) Object RA Dec mag sep mel Antares 16:30:58.5 -26:29:11 0.9 32.98 127 Nunki 18:56:50.6 -26:15:46 2.0 12.77 160 PPM 234707 18:35:06.4 -14:49:57 6.1 1.80 153 PPM 234837 18:40:19.8 -13:45:09 7.8 0.41 154 PPM 234847 18:40:52.8 -13:49:18 9.5 0.26 154 5145 18:41:40.2 -13:59:39 16.0 154 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 26.7 km
RECON observability=0.5 and success probability=0.0%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Kamloops | 10:34:49 | -8.9 | NT | Down | 18.8 | 215.0 | Really Low | 10:24:59 - 10:44:40 | 6786 |
| Kelowna | 10:34:46 | -9.3 | NT | Down | 19.1 | 216.0 | Really Low | 10:24:56 - 10:44:37 | 6725 |
| Peachland | 10:34:47 | -9.5 | NT | Down | 19.3 | 215.8 | Really Low | 10:24:57 - 10:44:38 | 6724 |
| Summerland | 10:34:46 | -9.6 | NT | Down | 19.4 | 215.9 | Really Low | 10:24:56 - 10:44:37 | 6714 |
| Victoria | 10:34:53 | -11.8 | NT | Down | 21.7 | 212.6 | Low | 10:25:02 - 10:44:43 | 6712 |
| Penticton | 10:34:46 | -9.6 | NT | Down | 19.4 | 216.0 | Really Low | 10:24:55 - 10:44:36 | 6708 |
| Oliver | 10:34:45 | -9.9 | NT | Down | 19.7 | 216.1 | Really Low | 10:24:55 - 10:44:36 | 6687 |
| Anarchist Mountain Observatory | 10:34:45 | -9.9 | NT | Down | 19.8 | 216.3 | Really Low | 10:24:54 - 10:44:35 | 6675 |
| Okanogan | 10:34:44 | -10.6 | NT | Down | 20.4 | 216.2 | Low | 10:24:53 - 10:44:34 | 6639 |
| Brewster | 10:34:45 | -10.9 | NT | Down | 20.7 | 216.1 | Low | 10:24:54 - 10:44:35 | 6626 |
| Sleaford | 10:34:24 | -2.1 | CT | Down | 11.8 | 227.8 | Really Low | 10:24:33 - 10:44:14 | 6625 |
| Manson/Chelan | 10:34:45 | -11.2 | NT | Down | 21.0 | 215.8 | Low | 10:24:55 - 10:44:36 | 6620 |
| Wenatchee | 10:34:44 | -11.6 | NT | Down | 21.4 | 215.8 | Low | 10:24:54 - 10:44:35 | 6594 |
| Ellensburg | 10:34:44 | -12.0 | AT | Down | 21.9 | 215.6 | Low | 10:24:54 - 10:44:35 | 6573 |
| Yakima | 10:34:44 | -12.4 | AT | Down | 22.2 | 215.7 | Low | 10:24:54 - 10:44:35 | 6547 |
| Toppenish/White Swan | 10:34:43 | -12.5 | AT | Down | 22.3 | 215.9 | Low | 10:24:52 - 10:44:33 | 6531 |
| The Dalles | 10:34:44 | -13.4 | AT | Down | 23.3 | 215.4 | Low | 10:24:54 - 10:44:35 | 6495 |
| PNWRO | 10:34:39 | -12.2 | AT | Down | 22.0 | 217.4 | Low | 10:24:49 - 10:44:30 | 6481 |
| Maupin | 10:34:43 | -13.8 | AT | Down | 23.6 | 215.6 | Low | 10:24:52 - 10:44:33 | 6467 |
| Sisters | 10:34:43 | -14.7 | AT | Down | 24.5 | 215.3 | Low | 10:24:52 - 10:44:33 | 6419 |
| Bend | 10:34:42 | -14.8 | AT | Down | 24.6 | 215.6 | Low | 10:24:51 - 10:44:32 | 6399 |
| Oregon Observatory | 10:34:43 | -15.0 | AT | Down | 24.8 | 215.5 | Low | 10:24:52 - 10:44:33 | 6390 |
| Chiloquin | 10:34:41 | -16.2 | AT | Down | 26.0 | 215.5 | Low | 10:24:51 - 10:44:32 | 6309 |
| Klamath Falls | 10:34:41 | -16.5 | AT | Down | 26.2 | 215.7 | Low | 10:24:51 - 10:44:32 | 6284 |
| Cedarville | 10:34:36 | -16.4 | AT | Down | 26.1 | 217.4 | Low | 10:24:46 - 10:44:27 | 6206 |
| Fall River/Burney | 10:34:38 | -17.3 | AT | Down | 27.0 | 216.4 | Low | 10:24:48 - 10:44:29 | 6194 |
| Greenville | 10:34:36 | -17.8 | AT | Down | 27.6 | 217.1 | Low | 10:24:46 - 10:44:27 | 6122 |
| Gimple | 10:34:36 | -17.8 | AT | Down | 27.5 | 217.2 | Low | 10:24:45 - 10:44:26 | 6120 |
| Quincy | 10:34:36 | -18.0 | Dark | Down | 27.7 | 217.2 | Low | 10:24:46 - 10:44:27 | 6107 |
| Portola | 10:34:34 | -17.9 | AT | Down | 27.6 | 217.6 | Low | 10:24:44 - 10:44:25 | 6089 |
| Reno | 10:34:32 | -17.8 | AT | Down | 27.5 | 218.3 | Low | 10:24:42 - 10:44:23 | 6057 |
| Carson City | 10:34:32 | -18.1 | Dark | Down | 27.8 | 218.5 | Low | 10:24:42 - 10:44:23 | 6030 |
| Gardnerville | 10:34:32 | -18.3 | Dark | Down | 28.0 | 218.6 | Low | 10:24:41 - 10:44:22 | 6011 |
| Yerington | 10:34:30 | -18.0 | AT | Down | 27.6 | 219.1 | Low | 10:24:39 - 10:44:20 | 6003 |
| Hawthorne | 10:34:28 | -18.1 | Dark | Down | 27.7 | 219.8 | Low | 10:24:37 - 10:44:18 | 5958 |
| Lee Vining | 10:34:29 | -18.8 | Dark | Down | 28.4 | 219.5 | Low | 10:24:38 - 10:44:19 | 5926 |
| Bishop | 10:34:26 | -18.9 | Dark | Down | 28.5 | 220.4 | Low | 10:24:36 - 10:44:17 | 5866 |
| Dunrhomin | 10:33:59 | -9.8 | NT | Down | 19.2 | 230.9 | Really Low | 10:24:08 - 10:43:49 | 5806 |
| Beatty | 10:34:21 | -18.4 | Dark | Down | 28.0 | 222.1 | Low | 10:24:31 - 10:44:12 | 5796 |
| Nikitin | 10:33:59 | -10.0 | NT | Down | 19.3 | 230.9 | Really Low | 10:24:08 - 10:43:49 | 5793 |
| CU-SBO | 10:33:58 | -10.1 | NT | Down | 19.4 | 230.9 | Really Low | 10:24:08 - 10:43:49 | 5790 |
| Patrick | 10:34:12 | -18.1 | Dark | Down | 27.5 | 225.2 | Low | 10:24:22 - 10:44:03 | 5617 |
| Wildwood | 10:34:23 | -21.6 | Dark | Down | 31.1 | 221.4 | Up | 10:24:32 - 10:44:13 | 5613 |
| Laughlin/Bullhead City | 10:34:14 | -18.6 | Dark | Down | 28.1 | 224.6 | Low | 10:24:23 - 10:44:04 | 5612 |
| Lake Havasu City | 10:34:12 | -19.0 | Dark | Down | 28.4 | 225.1 | Low | 10:24:22 - 10:44:03 | 5553 |
| Idyllwild | 10:34:17 | -20.9 | Dark | Down | 30.3 | 223.3 | Up | 10:24:27 - 10:44:08 | 5544 |
| Calipatria | 10:34:14 | -20.7 | Dark | Down | 30.1 | 224.6 | Up | 10:24:23 - 10:44:04 | 5467 |
| George/Scottsdale | 10:34:05 | -18.2 | Dark | Down | 27.5 | 227.5 | Low | 10:24:14 - 10:43:55 | 5434 |
| Yuma | 10:34:11 | -20.5 | Dark | Down | 29.9 | 225.6 | Low | 10:24:20 - 10:44:01 | 5412 |
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 5145, (2025/06/27 10:37UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 32.98 127 Nunki 18:55:15.9 -26:17:49 2.0 12.77 160 PPM 234707 18:33:39.1 -14:51:14 6.1 1.80 153 PPM 234837 18:38:53.2 -13:46:37 7.8 0.41 154 PPM 234847 18:39:26.1 -13:50:47 9.5 0.26 154 5145 18:40:13.5 -14:01:10 16.0 154 Positions are for J2000
Event circumstances last updated at 2024/06/13 03:56:53 UT
Marc W. Buie, Southwest Research Institute