Event between (15820) 94TB and star GA1220:01289660 with event index number of 1497558
Geocentric closest approach at 2026/01/09 11:54:49 UTC
J2000 position of star is 04:54:33.3 +33:32:35
Equinox of date position of star is 04:56:08.2 +33:34:50
Stellar brightness G=14.9,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 110 degrees from the moon.
Moon is 61% illuminated.
Apparent brightness V=22.0
[RECON map]
Object is 27.4 AU from the Sun
and 26.6 AU from the Earth.
Apparent velocity is 19.4
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 220 seconds.
The 1-sigma cross-track error in the shadow position is
1987 km.
The sky-plane scale is
19268.5 km/arcsec.
The object has an absolute magnitude Hv=7.6
Diameter=183.7 km assuming a 5% albedo -- 9.4 sec chord
Diameter=75.0 km assuming a 30% albedo -- 3.8 sec chord
Dynamical classification is 3:2E
Star training set for 15820, (2026/01/09 11:54UT) Object RA Dec mag sep mel Aldebaran 04:37:25.0 +16:33:35 0.8 17.54 116 3Iot Aur 04:58:41.6 +33:12:17 2.7 0.63 110 PPM 069666 04:51:00.4 +32:37:53 6.0 1.45 111 PPM 069754 04:57:12.0 +32:49:25 8.2 0.78 110 PPM 069724 04:55:06.5 +33:58:22 9.7 0.46 110 PPM 069747 04:56:48.7 +33:29:18 10.7 0.15 110 15820 04:56:15.5 +33:35:00 14.9 110 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
4.1 sigma about the mid-time.
The median site spacing is 27.0 km
RECON observability=0.5 and success probability=1.3%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Sleaford | 11:50:39 | -29.4 | Dark | Up | 16.6 | 303.8 | Really Low | 11:35:39 - 12:05:39 | 6509 |
| Kamloops | 11:50:39 | -38.5 | Dark | Up | 23.7 | 294.6 | Low | 11:35:39 - 12:05:39 | 5837 |
| Kelowna | 11:50:39 | -38.1 | Dark | Up | 22.9 | 295.5 | Low | 11:35:39 - 12:05:39 | 5810 |
| Peachland | 11:50:39 | -38.3 | Dark | Up | 23.0 | 295.3 | Low | 11:35:39 - 12:05:39 | 5790 |
| Summerland | 11:50:39 | -38.3 | Dark | Up | 22.9 | 295.4 | Low | 11:35:39 - 12:05:39 | 5782 |
| Penticton | 11:50:39 | -38.3 | Dark | Up | 22.8 | 295.5 | Low | 11:35:39 - 12:05:39 | 5782 |
| Oliver | 11:50:39 | -38.3 | Dark | Up | 22.6 | 295.7 | Low | 11:35:39 - 12:05:39 | 5755 |
| Anarchist Mountain Observatory | 11:50:39 | -38.2 | Dark | Up | 22.4 | 295.9 | Low | 11:35:39 - 12:05:39 | 5750 |
| Okanogan | 11:50:39 | -38.5 | Dark | Up | 22.3 | 295.9 | Low | 11:35:39 - 12:05:39 | 5691 |
| Dunrhomin | 11:49:50 | -28.6 | Dark | Up | 9.4 | 306.4 | Really Low | 11:34:50 - 12:04:50 | 5684 |
| Nikitin | 11:49:52 | -28.6 | Dark | Up | 9.3 | 306.4 | Really Low | 11:34:52 - 12:04:52 | 5668 |
| Brewster | 11:50:39 | -38.7 | Dark | Up | 22.3 | 295.9 | Low | 11:35:39 - 12:05:39 | 5662 |
| CU-SBO | 11:49:51 | -28.6 | Dark | Up | 9.3 | 306.4 | Really Low | 11:34:51 - 12:04:51 | 5659 |
| Manson/Chelan | 11:50:39 | -38.9 | Dark | Up | 22.4 | 295.8 | Low | 11:35:39 - 12:05:39 | 5631 |
| Wenatchee | 11:50:39 | -39.1 | Dark | Up | 22.3 | 295.8 | Low | 11:35:39 - 12:05:39 | 5587 |
| Victoria | 11:50:39 | -40.9 | Dark | Up | 24.7 | 293.5 | Low | 11:35:39 - 12:05:39 | 5550 |
| Ellensburg | 11:50:39 | -39.4 | Dark | Up | 22.3 | 295.9 | Low | 11:35:39 - 12:05:39 | 5546 |
| PNWRO | 11:50:39 | -38.4 | Dark | Up | 20.8 | 297.2 | Low | 11:35:39 - 12:05:39 | 5540 |
| Yakima | 11:50:39 | -39.4 | Dark | Up | 22.1 | 296.0 | Low | 11:35:39 - 12:05:39 | 5514 |
| Toppenish/White Swan | 11:50:39 | -39.4 | Dark | Up | 21.9 | 296.2 | Low | 11:35:39 - 12:05:39 | 5504 |
| The Dalles | 11:50:39 | -40.0 | Dark | Up | 22.1 | 296.0 | Low | 11:35:39 - 12:05:39 | 5410 |
| Maupin | 11:50:39 | -40.0 | Dark | Up | 21.8 | 296.2 | Low | 11:35:39 - 12:05:39 | 5382 |
| Sisters | 11:50:03 | -40.6 | Dark | Up | 21.8 | 296.1 | Low | 11:35:03 - 12:05:03 | 5247 |
| Bend | 11:50:03 | -40.4 | Dark | Up | 21.6 | 296.4 | Low | 11:35:03 - 12:05:03 | 5237 |
| Oregon Observatory | 11:50:02 | -40.6 | Dark | Up | 21.6 | 296.4 | Low | 11:35:02 - 12:05:02 | 5217 |
| Chiloquin | 11:49:59 | -41.0 | Dark | Up | 21.3 | 296.6 | Low | 11:34:59 - 12:04:59 | 5084 |
| Cedarville | 11:49:56 | -39.9 | Dark | Up | 19.7 | 297.8 | Really Low | 11:34:56 - 12:04:56 | 5068 |
| Klamath Falls | 11:49:58 | -41.0 | Dark | Up | 21.1 | 296.7 | Low | 11:34:58 - 12:04:58 | 5058 |
| Fall River/Burney | 11:49:55 | -40.9 | Dark | Up | 20.3 | 297.3 | Low | 11:34:55 - 12:04:55 | 4971 |
| Gimple | 11:49:53 | -40.6 | Dark | Up | 19.5 | 297.9 | Really Low | 11:34:53 - 12:04:53 | 4914 |
| Greenville | 11:49:53 | -40.6 | Dark | Up | 19.6 | 297.9 | Really Low | 11:34:53 - 12:04:53 | 4911 |
| Reno | 11:49:50 | -39.8 | Dark | Up | 18.5 | 298.6 | Really Low | 11:34:50 - 12:04:50 | 4910 |
| Portola | 11:49:52 | -40.3 | Dark | Up | 19.1 | 298.2 | Really Low | 11:34:52 - 12:04:52 | 4904 |
| Quincy | 11:49:52 | -40.6 | Dark | Up | 19.5 | 297.9 | Really Low | 11:34:52 - 12:04:52 | 4893 |
| Yerington | 11:49:49 | -39.3 | Dark | Up | 17.8 | 299.1 | Really Low | 11:34:49 - 12:04:49 | 4892 |
| Carson City | 11:49:50 | -39.8 | Dark | Up | 18.3 | 298.7 | Really Low | 11:34:50 - 12:04:50 | 4880 |
| Hawthorne | 11:49:47 | -38.9 | Dark | Up | 17.2 | 299.5 | Really Low | 11:34:47 - 12:04:47 | 4877 |
| Gardnerville | 11:49:48 | -39.8 | Dark | Up | 18.2 | 298.8 | Really Low | 11:34:48 - 12:04:48 | 4861 |
| Patrick | 11:49:39 | -35.1 | Dark | Up | 12.4 | 302.5 | Really Low | 11:34:39 - 12:04:39 | 4841 |
| Beatty | 11:49:43 | -37.5 | Dark | Up | 15.2 | 300.8 | Really Low | 11:34:43 - 12:04:43 | 4825 |
| Lee Vining | 11:49:46 | -39.3 | Dark | Up | 17.3 | 299.4 | Really Low | 11:34:46 - 12:04:46 | 4804 |
| George/Scottsdale | 11:49:36 | -33.3 | Dark | Up | 10.1 | 303.8 | Really Low | 11:34:36 - 12:04:36 | 4801 |
| Bishop | 11:49:44 | -38.8 | Dark | Up | 16.5 | 299.9 | Really Low | 11:34:44 - 12:04:44 | 4786 |
| Laughlin/Bullhead City | 11:49:39 | -35.7 | Dark | Up | 12.8 | 302.2 | Really Low | 11:34:39 - 12:04:39 | 4784 |
| Lake Havasu City | 11:49:38 | -35.4 | Dark | Up | 12.2 | 302.5 | Really Low | 11:34:38 - 12:04:38 | 4738 |
| Yuma | 11:49:34 | -35.5 | Dark | Up | 11.5 | 302.7 | Really Low | 11:34:34 - 12:04:34 | 4564 |
| Calipatria | 11:49:35 | -36.3 | Dark | Up | 12.3 | 302.2 | Really Low | 11:34:35 - 12:04:35 | 4555 |
| Idyllwild | 11:49:36 | -37.3 | Dark | Up | 13.5 | 301.5 | Really Low | 11:34:36 - 12:04:36 | 4548 |
| Wildwood | 11:49:38 | -38.9 | Dark | Up | 15.0 | 300.6 | Really Low | 11:34:38 - 12:04:38 | 4484 |
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 15820, (2026/01/09 11:54UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:29 0.8 17.54 116 3Iot Aur 04:56:59.6 +33:09:58 2.7 0.63 110 PPM 069666 04:49:19.1 +32:35:16 6.0 1.45 111 PPM 069754 04:55:30.4 +32:47:02 8.2 0.78 110 PPM 069724 04:53:24.0 +33:55:54 9.7 0.46 110 PPM 069747 04:55:06.6 +33:26:54 10.7 0.15 110 15820 04:54:33.3 +33:32:35 14.9 110 Positions are for J2000
Event circumstances last updated at 2024/02/25 04:10:31 UT
Marc W. Buie, Southwest Research Institute