Event between (535988) 15BU518 and star GA0720:05530387 with event index number of 2559660
Geocentric closest approach at 2026/04/30 10:19:11 UTC
J2000 position of star is 15:27:58.4 -17:12:09
Equinox of date position of star is 15:29:16.1 -17:16:50
Stellar brightness G=14.6,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 29 degrees from the moon.
Moon is 98% illuminated.
TNO apparent brightness V=22.7
[RECON map]
TNO is 33.4 AU from the Sun
and 32.4 AU from the Earth.
The TNO is moving 23.0
km/sec on the sky relative to the star, or,
3.5 arcsec/hr.
The 1-sigma error in the time of the event is 146 seconds.
The 1-sigma cross-track error in the shadow position is
2133 km.
The sky-plane scale is
23513.5 km/arcsec.
The TNO has an absolute magnitude Hv=7.5
Diameter=190.6 km assuming a 5% albedo -- 8.3 sec chord
Diameter=77.8 km assuming a 30% albedo -- 3.4 sec chord
Dynamical classification is SCATNEAR
Star training set for 535988, (2026/04/30 10:21UT) Object RA Dec mag sep mel Antares 16:31:01.6 -26:29:17 0.9 16.96 44 27Bet Lib 15:18:25.7 -09:28:42 2.6 8.26 27 32Zet1Lib 15:29:44.8 -16:48:23 5.6 0.49 29 PPM 230220 15:26:55.2 -17:11:07 8.4 0.62 28 PPM 230279 15:29:14.4 -17:14:38 9.4 0.07 29 535988 15:29:28.0 -17:17:33 14.6 29 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 13.7 km
RECON observability=1.0 and success probability=9.4%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Sleaford | 10:18:27 | -10.6 | NT | Up | 14.3 | 214.5 | Really Low | 10:05:46 - 10:31:07 | 2476 |
| Kamloops | 10:19:02 | -17.6 | AT | Up | 19.7 | 201.1 | Really Low | 10:06:22 - 10:31:43 | 2380 |
| Kelowna | 10:18:59 | -18.0 | AT | Up | 20.3 | 202.1 | Low | 10:06:18 - 10:31:39 | 2355 |
| Peachland | 10:18:59 | -18.2 | Dark | Up | 20.4 | 201.8 | Low | 10:06:19 - 10:31:40 | 2350 |
| Summerland | 10:18:59 | -18.3 | Dark | Up | 20.5 | 201.9 | Low | 10:06:18 - 10:31:39 | 2344 |
| Penticton | 10:18:58 | -18.3 | Dark | Up | 20.6 | 202.0 | Low | 10:06:18 - 10:31:39 | 2343 |
| Oliver | 10:18:58 | -18.5 | Dark | Up | 20.9 | 202.1 | Low | 10:06:17 - 10:31:38 | 2329 |
| Anarchist Mountain Observatory | 10:18:56 | -18.6 | Dark | Up | 21.0 | 202.3 | Low | 10:06:16 - 10:31:37 | 2324 |
| Okanogan | 10:18:57 | -19.2 | Dark | Up | 21.7 | 202.2 | Low | 10:06:16 - 10:31:37 | 2296 |
| Brewster | 10:18:56 | -19.5 | Dark | Up | 22.0 | 202.0 | Low | 10:06:16 - 10:31:37 | 2284 |
| Victoria | 10:19:08 | -20.5 | Dark | Up | 22.4 | 198.4 | Low | 10:06:28 - 10:31:49 | 2275 |
| Manson/Chelan | 10:18:57 | -19.8 | Dark | Up | 22.3 | 201.7 | Low | 10:06:17 - 10:31:38 | 2273 |
| Wenatchee | 10:18:57 | -20.3 | Dark | Up | 22.7 | 201.6 | Low | 10:06:17 - 10:31:38 | 2252 |
| Ellensburg | 10:18:57 | -20.7 | Dark | Up | 23.2 | 201.4 | Low | 10:06:16 - 10:31:37 | 2233 |
| Yakima | 10:18:56 | -21.0 | Dark | Up | 23.6 | 201.5 | Low | 10:06:16 - 10:31:37 | 2215 |
| Toppenish/White Swan | 10:18:56 | -21.1 | Dark | Up | 23.7 | 201.7 | Low | 10:06:15 - 10:31:36 | 2207 |
| PNWRO | 10:18:50 | -20.8 | Dark | Up | 23.7 | 203.2 | Low | 10:06:10 - 10:31:31 | 2201 |
| The Dalles | 10:18:56 | -22.1 | Dark | Up | 24.7 | 201.0 | Low | 10:06:16 - 10:31:37 | 2166 |
| Maupin | 10:18:56 | -22.4 | Dark | Up | 25.0 | 201.2 | Low | 10:06:16 - 10:31:37 | 2148 |
| Sisters | 10:18:56 | -23.3 | Dark | Up | 26.0 | 200.8 | Low | 10:06:16 - 10:31:37 | 2103 |
| Bend | 10:18:54 | -23.4 | Dark | Up | 26.1 | 201.1 | Low | 10:06:14 - 10:31:35 | 2094 |
| Oregon Observatory | 10:18:55 | -23.6 | Dark | Up | 26.3 | 201.0 | Low | 10:06:14 - 10:31:35 | 2085 |
| Chiloquin | 10:18:54 | -24.8 | Dark | Up | 27.7 | 200.8 | Low | 10:06:14 - 10:31:35 | 2016 |
| Klamath Falls | 10:18:53 | -25.1 | Dark | Up | 28.0 | 201.0 | Low | 10:06:13 - 10:31:34 | 1999 |
| Cedarville | 10:18:47 | -24.9 | Dark | Up | 28.2 | 202.7 | Low | 10:06:06 - 10:31:27 | 1976 |
| Dunrhomin | 10:17:56 | -18.0 | AT | Up | 23.6 | 217.5 | Low | 10:05:15 - 10:30:36 | 1964 |
| CU-SBO | 10:17:56 | -18.2 | Dark | Up | 23.9 | 217.5 | Low | 10:05:15 - 10:30:36 | 1951 |
| Fall River/Burney | 10:18:51 | -25.9 | Dark | Up | 29.0 | 201.6 | Low | 10:06:10 - 10:31:31 | 1940 |
| Gimple | 10:18:47 | -26.3 | Dark | Up | 29.6 | 202.3 | Low | 10:06:06 - 10:31:27 | 1896 |
| Greenville | 10:18:47 | -26.4 | Dark | Up | 29.7 | 202.2 | Low | 10:06:07 - 10:31:28 | 1895 |
| Quincy | 10:18:47 | -26.5 | Dark | Up | 29.9 | 202.3 | Low | 10:06:07 - 10:31:28 | 1884 |
| Portola | 10:18:46 | -26.4 | Dark | Up | 29.8 | 202.8 | Low | 10:06:05 - 10:31:26 | 1881 |
| Reno | 10:18:43 | -26.3 | Dark | Up | 29.9 | 203.5 | Low | 10:06:03 - 10:31:24 | 1871 |
| Carson City | 10:18:42 | -26.6 | Dark | Up | 30.2 | 203.6 | Up | 10:06:01 - 10:31:22 | 1851 |
| Yerington | 10:18:39 | -26.4 | Dark | Up | 30.2 | 204.3 | Up | 10:05:59 - 10:31:20 | 1845 |
| Gardnerville | 10:18:41 | -26.8 | Dark | Up | 30.4 | 203.7 | Up | 10:06:01 - 10:31:22 | 1838 |
| Hawthorne | 10:18:37 | -26.5 | Dark | Up | 30.4 | 205.0 | Up | 10:05:56 - 10:31:17 | 1822 |
| Lee Vining | 10:18:38 | -27.2 | Dark | Up | 31.1 | 204.6 | Up | 10:05:57 - 10:31:18 | 1787 |
| Bishop | 10:18:34 | -27.3 | Dark | Up | 31.4 | 205.5 | Up | 10:05:54 - 10:31:15 | 1756 |
| Beatty | 10:18:28 | -26.8 | Dark | Up | 31.3 | 207.3 | Up | 10:05:47 - 10:31:08 | 1739 |
| Patrick | 10:18:15 | -26.3 | Dark | Up | 31.5 | 210.7 | Up | 10:05:34 - 10:30:55 | 1664 |
| Laughlin/Bullhead City | 10:18:17 | -26.8 | Dark | Up | 32.0 | 210.0 | Up | 10:05:36 - 10:30:57 | 1645 |
| Lake Havasu City | 10:18:15 | -27.2 | Dark | Up | 32.4 | 210.5 | Up | 10:05:34 - 10:30:55 | 1604 |
| George/Scottsdale | 10:18:05 | -26.3 | Dark | Up | 32.0 | 213.2 | Up | 10:05:25 - 10:30:46 | 1565 |
| Wildwood | 10:18:29 | -29.9 | Dark | Up | 34.4 | 206.2 | Up | 10:05:49 - 10:31:10 | 1552 |
| Idyllwild | 10:18:22 | -29.1 | Dark | Up | 34.1 | 208.3 | Up | 10:05:41 - 10:31:02 | 1543 |
| Calipatria | 10:18:17 | -28.8 | Dark | Up | 34.1 | 209.7 | Up | 10:05:36 - 10:30:57 | 1509 |
| Yuma | 10:18:13 | -28.6 | Dark | Up | 34.1 | 210.8 | Up | 10:05:32 - 10:30:53 | 1485 |
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 535988, (2026/04/30 10:21UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 16.96 44 27Bet Lib 15:17:00.3 -09:22:59 2.6 8.26 27 32Zet1Lib 15:28:15.4 -16:43:00 5.6 0.49 29 PPM 230220 15:25:25.8 -17:05:39 8.4 0.62 28 PPM 230279 15:27:44.9 -17:09:14 9.4 0.07 29 535988 15:27:58.4 -17:12:09 14.6 29 Positions are for J2000
Event circumstances last updated at 2022/11/02 02:04:34 UT
Marc W. Buie, Southwest Research Institute