Event between (15820) 94TB and star GA1220:01521752 with event index number of 1643309
Geocentric closest approach at 2026/12/18 07:30:15 UTC
J2000 position of star is 05:11:38.2 +33:39:12
Equinox of date position of star is 05:13:13.5 +33:40:52
Stellar brightness G=15.7,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 70 degrees from the moon.
Moon is 61% illuminated.
Apparent brightness V=22.0
[RECON map]
Object is 27.5 AU from the Sun
and 26.5 AU from the Earth.
Apparent velocity is 23.7
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 242 seconds.
The 1-sigma cross-track error in the shadow position is
1034 km.
The sky-plane scale is
19247.4 km/arcsec.
The object has an absolute magnitude Hv=7.6
Diameter=183.7 km assuming a 5% albedo -- 7.7 sec chord
Diameter=75.0 km assuming a 30% albedo -- 3.1 sec chord
Dynamical classification is 3:2E
Star training set for 15820, (2026/12/18 07:30UT) Object RA Dec mag sep mel Aldebaran 04:37:28.2 +16:33:41 0.8 18.93 61 3Iot Aur 04:58:45.2 +33:12:22 2.7 3.09 67 14 Aur 05:17:09.9 +32:42:58 5.2 1.25 71 PPM 070028 05:13:55.4 +32:55:32 7.9 0.77 70 PPM 070018 05:13:14.4 +34:08:06 10.0 0.45 70 PPM 070027 05:13:43.5 +33:49:11 10.2 0.15 70 15820 05:13:24.6 +33:41:03 15.7 71 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
3.7 sigma about the mid-time.
The median site spacing is 37.5 km
RECON observability=1.0 and success probability=0.4%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Sleaford | 07:29:19 | -60.8 | Dark | Up | 68.5 | 217.1 | Up | 07:14:19 - 07:44:19 | -1431 |
| Kamloops | 07:30:01 | -62.2 | Dark | Up | 73.0 | 183.3 | Up | 07:15:01 - 07:45:01 | -1518 |
| Kelowna | 07:29:59 | -63.1 | Dark | Up | 73.7 | 186.1 | Up | 07:14:59 - 07:44:59 | -1612 |
| Peachland | 07:30:00 | -63.2 | Dark | Up | 73.9 | 185.3 | Up | 07:15:00 - 07:45:00 | -1621 |
| Summerland | 07:29:59 | -63.3 | Dark | Up | 74.0 | 185.6 | Up | 07:14:59 - 07:44:59 | -1638 |
| Penticton | 07:29:59 | -63.4 | Dark | Up | 74.1 | 186.0 | Up | 07:14:59 - 07:44:59 | -1646 |
| Oliver | 07:29:59 | -63.8 | Dark | Up | 74.4 | 186.1 | Up | 07:14:59 - 07:44:59 | -1684 |
| Anarchist Mountain Observatory | 07:29:59 | -63.9 | Dark | Up | 74.6 | 186.7 | Up | 07:14:59 - 07:44:59 | -1704 |
| Victoria | 07:30:11 | -63.7 | Dark | Up | 75.1 | 174.0 | Up | 07:15:11 - 07:45:11 | -1714 |
| Okanogan | 07:30:00 | -64.5 | Dark | Up | 75.2 | 186.3 | Up | 07:15:00 - 07:45:00 | -1770 |
| Brewster | 07:30:01 | -64.8 | Dark | Up | 75.5 | 185.8 | Up | 07:15:01 - 07:45:01 | -1798 |
| Manson/Chelan | 07:30:02 | -64.9 | Dark | Up | 75.7 | 184.6 | Up | 07:15:02 - 07:45:02 | -1816 |
| Wenatchee | 07:30:03 | -65.3 | Dark | Up | 76.2 | 184.2 | Up | 07:15:03 - 07:45:03 | -1866 |
| Ellensburg | 07:30:04 | -65.7 | Dark | Up | 76.6 | 183.6 | Up | 07:15:04 - 07:45:04 | -1908 |
| Yakima | 07:30:04 | -66.1 | Dark | Up | 77.0 | 183.6 | Up | 07:15:04 - 07:45:04 | -1951 |
| Toppenish/White Swan | 07:30:03 | -66.3 | Dark | Up | 77.2 | 184.3 | Up | 07:15:03 - 07:45:03 | -1976 |
| PNWRO | 07:29:59 | -66.9 | Dark | Up | 77.5 | 190.1 | Up | 07:14:59 - 07:44:59 | -2030 |
| The Dalles | 07:30:06 | -66.9 | Dark | Up | 78.1 | 181.4 | Up | 07:15:06 - 07:45:06 | -2052 |
| Maupin | 07:30:06 | -67.3 | Dark | Up | 78.5 | 181.9 | Up | 07:15:06 - 07:45:06 | -2098 |
| Sisters | 07:30:08 | -68.0 | Dark | Up | 79.4 | 179.9 | Up | 07:15:08 - 07:45:08 | -2188 |
| Bend | 07:30:08 | -68.3 | Dark | Up | 79.6 | 181.1 | Up | 07:15:08 - 07:45:08 | -2216 |
| Oregon Observatory | 07:30:08 | -68.5 | Dark | Up | 79.8 | 180.5 | Up | 07:15:08 - 07:45:08 | -2233 |
| Chiloquin | 07:30:11 | -69.6 | Dark | Up | 81.1 | 178.4 | Up | 07:15:11 - 07:45:11 | -2372 |
| Klamath Falls | 07:30:11 | -69.9 | Dark | Up | 81.4 | 178.8 | Up | 07:15:11 - 07:45:11 | -2410 |
| Cedarville | 07:30:05 | -71.0 | Dark | Up | 82.0 | 188.3 | Up | 07:15:05 - 07:45:05 | -2504 |
| Fall River/Burney | 07:30:10 | -71.1 | Dark | Up | 82.6 | 181.1 | Up | 07:15:10 - 07:45:10 | -2543 |
| Greenville | 07:30:09 | -72.1 | Dark | Up | 83.5 | 184.5 | Up | 07:15:09 - 07:45:09 | -2647 |
| Gimple | 07:30:09 | -72.1 | Dark | Up | 83.5 | 185.1 | Up | 07:15:09 - 07:45:09 | -2648 |
| Quincy | 07:30:09 | -72.3 | Dark | Up | 83.7 | 184.6 | Up | 07:15:09 - 07:45:09 | -2669 |
| Portola | 07:30:08 | -72.5 | Dark | Up | 83.8 | 188.4 | Up | 07:15:08 - 07:45:08 | -2688 |
| Dunrhomin | 07:29:14 | -71.8 | Dark | Up | 75.5 | 248.0 | Up | 07:14:14 - 07:44:14 | -2716 |
| Reno | 07:30:06 | -73.0 | Dark | Up | 83.9 | 193.8 | Up | 07:15:06 - 07:45:06 | -2724 |
| Nikitin | 07:29:14 | -72.0 | Dark | Up | 75.6 | 248.6 | Up | 07:14:14 - 07:44:14 | -2736 |
| CU-SBO | 07:29:14 | -72.1 | Dark | Up | 75.7 | 248.7 | Up | 07:14:14 - 07:44:14 | -2743 |
| Carson City | 07:30:05 | -73.3 | Dark | Up | 84.3 | 194.8 | Up | 07:15:05 - 07:45:05 | -2764 |
| Gardnerville | 07:30:05 | -73.5 | Dark | Up | 84.5 | 195.8 | Up | 07:15:05 - 07:45:05 | -2791 |
| Yerington | 07:30:03 | -73.6 | Dark | Up | 84.3 | 200.4 | Up | 07:15:03 - 07:45:03 | -2792 |
| Hawthorne | 07:30:01 | -74.2 | Dark | Up | 84.6 | 206.5 | Up | 07:15:01 - 07:45:01 | -2849 |
| Lee Vining | 07:30:04 | -74.6 | Dark | Up | 85.3 | 205.2 | Up | 07:15:04 - 07:45:04 | -2906 |
| Bishop | 07:30:02 | -75.4 | Dark | Up | 85.5 | 215.4 | Up | 07:15:02 - 07:45:02 | -2979 |
| Beatty | 07:29:55 | -76.2 | Dark | Up | 84.9 | 231.4 | Up | 07:14:55 - 07:44:55 | -3045 |
| Patrick | 07:29:45 | -78.0 | Dark | Up | 83.5 | 256.5 | Up | 07:14:45 - 07:44:45 | -3231 |
| Laughlin/Bullhead City | 07:29:48 | -78.2 | Dark | Up | 84.1 | 257.1 | Up | 07:14:48 - 07:44:48 | -3253 |
| Lake Havasu City | 07:29:47 | -78.9 | Dark | Up | 84.0 | 263.9 | Up | 07:14:47 - 07:44:47 | -3330 |
| Wildwood | 07:30:04 | -78.4 | Dark | Up | 87.5 | 260.6 | Up | 07:15:04 - 07:45:04 | -3337 |
| Idyllwild | 07:29:57 | -79.2 | Dark | Up | 86.0 | 270.2 | Up | 07:14:57 - 07:44:57 | -3395 |
| George/Scottsdale | 07:29:38 | -79.6 | Dark | Up | 82.0 | 272.2 | Up | 07:14:38 - 07:44:38 | -3430 |
| Calipatria | 07:29:53 | -80.1 | Dark | Up | 85.0 | 277.7 | Up | 07:14:53 - 07:44:53 | -3472 |
| Yuma | 07:29:50 | -80.6 | Dark | Up | 84.2 | 281.4 | Up | 07:14:50 - 07:44:50 | -3527 |
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, (2026/12/18 07:30UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:29 0.8 18.93 61 3Iot Aur 04:56:59.6 +33:09:58 2.7 3.09 67 14 Aur 05:15:24.3 +32:41:15 5.2 1.25 71 PPM 070028 05:12:09.6 +32:53:42 7.9 0.77 70 PPM 070018 05:11:27.6 +34:06:15 10.0 0.45 70 PPM 070027 05:11:57.0 +33:47:21 10.2 0.15 70 15820 05:11:38.2 +33:39:12 15.7 70 Positions are for J2000
Event circumstances last updated at 2024/02/25 04:10:52 UT
Marc W. Buie, Southwest Research Institute