Event between (139775) 01QG298 and star GA1000:00249103 with event index number of 1474280
Geocentric closest approach at 2025/12/04 01:00:38 UTC
J2000 position of star is 02:50:06.0 +10:11:59
Equinox of date position of star is 02:51:23.6 +10:17:52
Stellar brightness G=15.2,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 19 degrees from the moon.
Moon is 98% illuminated.
Apparent brightness V=22.1
[RECON map]
Object is 32.6 AU from the Sun
and 31.7 AU from the Earth.
Apparent velocity is 20.8
km/sec on the sky relative to the star, or,
3.3 arcsec/hr.
The 1-sigma error in the time of the event is 68 seconds.
The 1-sigma cross-track error in the shadow position is
1174 km.
The sky-plane scale is
23006.1 km/arcsec.
The object has an absolute magnitude Hv=6.9
Diameter=253.5 km assuming a 5% albedo -- 12.0 sec chord
Diameter=103.5 km assuming a 30% albedo -- 4.9 sec chord
Dynamical classification is 3:2E
Star training set for 139775, (2025/12/04 01:02UT) Object RA Dec mag sep mel Aldebaran 04:37:24.7 +16:33:34 0.8 26.48 15 Menkar 03:03:38.3 +04:11:24 2.5 6.82 23 87Mu Cet 02:46:20.8 +10:13:20 4.3 1.27 20 PPM 146018 02:55:10.0 +09:26:25 7.9 1.25 19 PPM 118594 02:51:50.7 +10:44:05 9.7 0.44 19 PPM 118588 02:51:19.5 +10:16:58 10.3 0.05 19 139775 02:51:30.0 +10:18:21 15.2 19 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 13.0 km
RECON observability=0.1 and success probability=46.3%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Kamloops | 01:02:48 | -9.7 | NT | Up | 17.9 | 95.8 | Really Low | 00:56:37 - 01:08:58 | 1088 |
| Kelowna | 01:02:51 | -9.9 | NT | Up | 18.6 | 96.3 | Really Low | 00:56:40 - 01:09:01 | 1030 |
| Peachland | 01:02:51 | -9.7 | NT | Up | 18.4 | 96.0 | Really Low | 00:56:41 - 01:09:02 | 1029 |
| Victoria | 01:03:00 | -7.1 | NT | Up | 16.2 | 92.8 | Really Low | 00:56:49 - 01:09:10 | 1023 |
| Summerland | 01:02:52 | -9.7 | NT | Up | 18.5 | 96.0 | Really Low | 00:56:42 - 01:09:03 | 1020 |
| Penticton | 01:02:52 | -9.8 | NT | Up | 18.6 | 96.1 | Really Low | 00:56:42 - 01:09:03 | 1014 |
| Oliver | 01:02:54 | -9.6 | NT | Up | 18.6 | 96.0 | Really Low | 00:56:44 - 01:09:05 | 995 |
| Anarchist Mountain Observatory | 01:02:55 | -9.7 | NT | Up | 18.8 | 96.1 | Really Low | 00:56:44 - 01:09:05 | 983 |
| Okanogan | 01:02:58 | -9.3 | NT | Up | 18.7 | 95.7 | Really Low | 00:56:47 - 01:09:08 | 950 |
| Brewster | 01:02:59 | -9.1 | NT | Up | 18.6 | 95.5 | Really Low | 00:56:49 - 01:09:10 | 938 |
| Manson/Chelan | 01:03:01 | -8.8 | NT | Up | 18.4 | 95.1 | Really Low | 00:56:50 - 01:09:11 | 933 |
| Sleaford | 01:02:25 | -18.7 | Dark | Up | 26.4 | 108.4 | Low | 00:56:14 - 01:08:35 | 912 |
| Wenatchee | 01:03:03 | -8.5 | NT | Up | 18.3 | 94.8 | Really Low | 00:56:52 - 01:09:13 | 909 |
| Ellensburg | 01:03:05 | -8.2 | NT | Up | 18.2 | 94.5 | Really Low | 00:56:54 - 01:09:15 | 889 |
| Yakima | 01:03:07 | -8.0 | NT | Up | 18.2 | 94.4 | Really Low | 00:56:56 - 01:09:17 | 866 |
| Toppenish/White Swan | 01:03:07 | -8.0 | NT | Up | 18.4 | 94.5 | Really Low | 00:56:57 - 01:09:18 | 850 |
| The Dalles | 01:03:12 | -7.2 | NT | Up | 17.9 | 93.6 | Really Low | 00:57:01 - 01:09:22 | 818 |
| PNWRO | 01:03:08 | -8.8 | NT | Up | 19.4 | 95.4 | Really Low | 00:56:57 - 01:09:18 | 801 |
| Maupin | 01:03:14 | -7.1 | NT | Up | 18.0 | 93.6 | Really Low | 00:57:03 - 01:09:24 | 791 |
| Sisters | 01:03:18 | -6.4 | NT | Up | 17.7 | 93.0 | Really Low | 00:57:07 - 01:09:28 | 746 |
| Bend | 01:03:19 | -6.5 | NT | Up | 17.9 | 93.1 | Really Low | 00:57:08 - 01:09:29 | 727 |
| Oregon Observatory | 01:03:20 | -6.4 | NT | Up | 17.8 | 92.9 | Really Low | 00:57:09 - 01:09:30 | 718 |
| Chiloquin | 01:03:26 | -5.5 | CT | Up | 17.6 | 92.2 | Really Low | 00:57:15 - 01:09:36 | 642 |
| Klamath Falls | 01:03:27 | -5.5 | CT | Up | 17.7 | 92.2 | Really Low | 00:57:17 - 01:09:38 | 619 |
| Cedarville | 01:03:29 | -6.3 | NT | Up | 18.9 | 93.0 | Really Low | 00:57:18 - 01:09:39 | 543 |
| Fall River/Burney | 01:03:32 | -5.2 | CT | Up | 18.0 | 92.1 | Really Low | 00:57:21 - 01:09:42 | 534 |
| Greenville | 01:03:35 | -5.2 | CT | Up | 18.4 | 92.1 | Really Low | 00:57:25 - 01:09:46 | 464 |
| Gimple | 01:03:35 | -5.2 | CT | Up | 18.5 | 92.1 | Really Low | 00:57:25 - 01:09:46 | 462 |
| Quincy | 01:03:36 | -5.1 | CT | Up | 18.4 | 92.0 | Really Low | 00:57:25 - 01:09:46 | 450 |
| Portola | 01:03:36 | -5.4 | CT | Up | 18.8 | 92.3 | Really Low | 00:57:26 - 01:09:47 | 432 |
| Reno | 01:03:37 | -5.7 | CT | Up | 19.3 | 92.6 | Really Low | 00:57:26 - 01:09:47 | 401 |
| Carson City | 01:03:38 | -5.6 | CT | Up | 19.3 | 92.5 | Really Low | 00:57:28 - 01:09:49 | 375 |
| Gardnerville | 01:03:39 | -5.5 | CT | Up | 19.4 | 92.5 | Really Low | 00:57:29 - 01:09:50 | 357 |
| Yerington | 01:03:38 | -6.0 | CT | Up | 19.8 | 92.9 | Really Low | 00:57:28 - 01:09:49 | 349 |
| Hawthorne | 01:03:39 | -6.1 | NT | Up | 20.3 | 93.0 | Low | 00:57:29 - 01:09:50 | 305 |
| Lee Vining | 01:03:43 | -5.6 | CT | Up | 19.9 | 92.5 | Really Low | 00:57:32 - 01:09:53 | 275 |
| Bishop | 01:03:44 | -5.9 | CT | Up | 20.5 | 92.8 | Low | 00:57:33 - 01:09:54 | 216 |
| Beatty | 01:03:44 | -6.9 | NT | Up | 21.9 | 93.6 | Low | 00:57:34 - 01:09:55 | 147 |
| Dunrhomin | 01:03:13 | -16.4 | AT | Up | 30.3 | 103.0 | Up | 00:57:02 - 01:09:23 | 135 |
| Nikitin | 01:03:14 | -16.4 | AT | Up | 30.3 | 102.9 | Up | 00:57:03 - 01:09:24 | 122 |
| CU-SBO | 01:03:14 | -16.3 | AT | Up | 30.2 | 102.8 | Up | 00:57:03 - 01:09:24 | 119 |
| Wildwood | 01:03:57 | -4.4 | CT | Up | 20.5 | 91.4 | Low | 00:57:47 - 01:10:08 | -26 |
| Patrick | 01:03:46 | -8.5 | NT | Up | 24.3 | 94.7 | Low | 00:57:35 - 01:09:56 | -29 |
| Laughlin/Bullhead City | 01:03:48 | -7.9 | NT | Up | 23.8 | 94.2 | Low | 00:57:37 - 01:09:58 | -33 |
| Lake Havasu City | 01:03:50 | -7.8 | NT | Up | 24.0 | 94.1 | Low | 00:57:40 - 01:10:01 | -91 |
| Idyllwild | 01:03:56 | -5.7 | CT | Up | 22.1 | 92.4 | Low | 00:57:46 - 01:10:07 | -95 |
| Calipatria | 01:03:57 | -6.4 | NT | Up | 23.1 | 92.8 | Low | 00:57:46 - 01:10:07 | -171 |
| George/Scottsdale | 01:03:49 | -9.5 | NT | Up | 26.1 | 95.2 | Low | 00:57:39 - 01:10:00 | -209 |
| Yuma | 01:03:57 | -6.9 | NT | Up | 23.9 | 93.1 | Low | 00:57:47 - 01:10:08 | -226 |
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 139775, (2025/12/04 01:02UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:29 0.8 26.48 15 Menkar 03:02:16.8 +04:05:21 2.5 6.82 23 87Mu Cet 02:44:56.9 +10:06:50 4.3 1.27 20 PPM 146018 02:53:46.3 +09:20:09 7.9 1.25 19 PPM 118594 02:50:26.6 +10:37:44 9.7 0.44 19 PPM 118588 02:49:55.5 +10:10:36 10.3 0.05 19 139775 02:50:06.0 +10:11:59 15.2 19 Positions are for J2000
Event circumstances last updated at 2023/12/22 05:58:07 UT
Marc W. Buie, Southwest Research Institute