Event between (535990) 15BW518 and star GA1100:03244618 with event index number of 2257851
Geocentric closest approach at 2022/02/25 10:37:09 UTC
J2000 position of star is 10:05:30.9 +21:14:15
Equinox of date position of star is 10:06:43.8 +21:07:49
Stellar brightness G=16.4,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 121 degrees from the moon.
Moon is 33% illuminated.
TNO apparent brightness V=22.5
[RECON map]
TNO is 38.1 AU from the Sun
and 37.2 AU from the Earth.
The TNO is moving 24.5
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 161 seconds.
The 1-sigma cross-track error in the shadow position is
2560 km.
The sky-plane scale is
26946.5 km/arcsec.
The TNO has an absolute magnitude Hv=6.7
Diameter=275.4 km assuming a 5% albedo -- 11.2 sec chord
Diameter=112.4 km assuming a 30% albedo -- 4.6 sec chord
Dynamical classification is CLASSICAL
Star training set for 535990, (2022/02/25 10:37UT) Object RA Dec mag sep mel Regulus 10:09:33.0 +11:51:29 1.3 9.30 117 PPM 100044 10:04:02.8 +21:50:29 5.4 0.95 121 PPM 100085 10:07:24.3 +21:24:22 8.1 0.32 121 PPM 100072 10:06:14.8 +21:12:04 10.7 0.14 121 535990 10:06:44.5 +21:07:45 16.4 120 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 16.1 km
RECON observability=1.0 and success probability=18.5%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Sleaford | 10:35:51 | -31.0 | Dark | Down | 36.7 | 257.1 | Up | 10:21:58 - 10:49:44 | 1645 |
| Kamloops | 10:36:07 | -39.1 | Dark | Down | 45.7 | 244.4 | Up | 10:22:14 - 10:50:00 | 1097 |
| Kelowna | 10:36:03 | -39.3 | Dark | Down | 45.5 | 246.1 | Up | 10:22:10 - 10:49:56 | 1072 |
| Peachland | 10:36:04 | -39.5 | Dark | Down | 45.7 | 245.9 | Up | 10:22:11 - 10:49:57 | 1055 |
| Summerland | 10:36:02 | -39.5 | Dark | Down | 45.7 | 246.1 | Up | 10:22:09 - 10:49:55 | 1048 |
| Penticton | 10:36:02 | -39.5 | Dark | Down | 45.7 | 246.3 | Up | 10:22:09 - 10:49:55 | 1047 |
| Oliver | 10:36:01 | -39.8 | Dark | Down | 45.8 | 246.6 | Up | 10:22:08 - 10:49:54 | 1023 |
| Anarchist Mountain Observatory | 10:36:00 | -39.8 | Dark | Down | 45.8 | 247.0 | Up | 10:22:07 - 10:49:53 | 1018 |
| Tonasket | 10:35:59 | -40.0 | Dark | Down | 45.9 | 247.2 | Up | 10:22:06 - 10:49:52 | 994 |
| Okanogan | 10:35:58 | -40.3 | Dark | Down | 46.2 | 247.4 | Up | 10:22:05 - 10:49:51 | 966 |
| Brewster | 10:35:58 | -40.6 | Dark | Down | 46.4 | 247.4 | Up | 10:22:05 - 10:49:51 | 940 |
| Dunrhomin | 10:35:06 | -35.6 | Dark | Up | 38.0 | 266.6 | Up | 10:21:13 - 10:48:59 | 931 |
| Manson/Chelan | 10:35:58 | -40.9 | Dark | Down | 46.7 | 247.3 | Up | 10:22:05 - 10:49:51 | 913 |
| Wenatchee | 10:35:56 | -41.3 | Dark | Down | 47.0 | 247.6 | Up | 10:22:03 - 10:49:49 | 874 |
| Victoria | 10:36:06 | -42.1 | Dark | Down | 48.4 | 243.3 | Up | 10:22:13 - 10:49:59 | 847 |
| Ellensburg | 10:35:56 | -41.7 | Dark | Down | 47.3 | 247.7 | Up | 10:22:03 - 10:49:49 | 837 |
| Pasco | 10:35:50 | -41.4 | Dark | Down | 46.7 | 249.9 | Up | 10:21:57 - 10:49:43 | 834 |
| PNWRO | 10:35:49 | -41.5 | Dark | Down | 46.6 | 250.3 | Up | 10:21:56 - 10:49:42 | 825 |
| Yakima | 10:35:54 | -42.0 | Dark | Down | 47.5 | 248.1 | Up | 10:22:01 - 10:49:47 | 807 |
| Toppenish/White Swan | 10:35:53 | -42.0 | Dark | Down | 47.4 | 248.5 | Up | 10:22:00 - 10:49:46 | 798 |
| Goldendale | 10:35:52 | -42.6 | Dark | Down | 47.9 | 248.7 | Up | 10:21:59 - 10:49:45 | 743 |
| The Dalles | 10:35:52 | -42.9 | Dark | Down | 48.2 | 248.5 | Up | 10:21:59 - 10:49:45 | 713 |
| Maupin | 10:35:51 | -43.2 | Dark | Down | 48.3 | 249.1 | Up | 10:21:58 - 10:49:44 | 686 |
| Redmond | 10:35:48 | -43.8 | Dark | Down | 48.7 | 249.9 | Up | 10:21:55 - 10:49:41 | 616 |
| Sisters | 10:35:49 | -44.0 | Dark | Down | 49.0 | 249.5 | Up | 10:21:56 - 10:49:42 | 603 |
| Bend | 10:35:48 | -44.0 | Dark | Down | 48.9 | 250.0 | Up | 10:21:55 - 10:49:41 | 595 |
| Oregon Observatory | 10:35:47 | -44.2 | Dark | Down | 49.0 | 250.1 | Up | 10:21:54 - 10:49:40 | 577 |
| La Pine/Gilchrist | 10:35:47 | -44.4 | Dark | Down | 49.1 | 250.2 | Up | 10:21:54 - 10:49:40 | 559 |
| North Lake | 10:35:44 | -44.3 | Dark | Down | 48.9 | 251.3 | Up | 10:21:51 - 10:49:37 | 549 |
| Paisley | 10:35:42 | -44.4 | Dark | Down | 48.8 | 252.2 | Up | 10:21:49 - 10:49:35 | 520 |
| Lakeview | 10:35:40 | -44.6 | Dark | Down | 48.8 | 252.9 | Up | 10:21:47 - 10:49:33 | 489 |
| Chiloquin | 10:35:44 | -45.3 | Dark | Down | 49.8 | 251.1 | Up | 10:21:51 - 10:49:37 | 461 |
| Cedarville | 10:35:37 | -44.9 | Dark | Down | 48.9 | 253.8 | Up | 10:21:44 - 10:49:30 | 445 |
| Klamath Falls | 10:35:43 | -45.4 | Dark | Down | 49.8 | 251.5 | Up | 10:21:50 - 10:49:36 | 437 |
| Fall River/Burney | 10:35:39 | -45.9 | Dark | Down | 49.9 | 253.2 | Up | 10:21:46 - 10:49:32 | 360 |
| Susanville | 10:35:35 | -45.9 | Dark | Down | 49.6 | 254.6 | Up | 10:21:42 - 10:49:28 | 339 |
| Gimple | 10:35:35 | -46.2 | Dark | Down | 49.8 | 254.7 | Up | 10:21:42 - 10:49:28 | 309 |
| Greenville | 10:35:35 | -46.2 | Dark | Down | 49.9 | 254.6 | Up | 10:21:42 - 10:49:28 | 306 |
| Reno | 10:35:30 | -45.8 | Dark | Down | 49.2 | 256.3 | Up | 10:21:37 - 10:49:23 | 303 |
| Portola | 10:35:33 | -46.1 | Dark | Down | 49.6 | 255.4 | Up | 10:21:40 - 10:49:26 | 299 |
| Quincy | 10:35:34 | -46.3 | Dark | Down | 49.9 | 254.9 | Up | 10:21:41 - 10:49:27 | 290 |
| Tonopah | 10:35:20 | -44.9 | Dark | Down | 47.5 | 260.0 | Up | 10:21:27 - 10:49:13 | 289 |
| Yerington | 10:35:27 | -45.7 | Dark | Down | 48.8 | 257.4 | Up | 10:21:34 - 10:49:20 | 285 |
| Carson City | 10:35:29 | -46.0 | Dark | Down | 49.2 | 256.7 | Up | 10:21:36 - 10:49:22 | 275 |
| Hawthorne | 10:35:25 | -45.6 | Dark | Down | 48.5 | 258.4 | Up | 10:21:32 - 10:49:18 | 269 |
| Gardnerville | 10:35:28 | -46.1 | Dark | Down | 49.3 | 257.0 | Up | 10:21:35 - 10:49:21 | 258 |
| Indian Springs | 10:35:13 | -44.6 | Dark | Up | 46.6 | 262.7 | Up | 10:21:20 - 10:49:06 | 233 |
| Henderson | 10:35:09 | -44.3 | Dark | Up | 46.1 | 263.7 | Up | 10:21:16 - 10:49:02 | 219 |
| Patrick | 10:35:05 | -43.8 | Dark | Up | 45.3 | 265.1 | Up | 10:21:12 - 10:48:58 | 216 |
| Beatty | 10:35:16 | -45.2 | Dark | Down | 47.4 | 261.6 | Up | 10:21:23 - 10:49:09 | 215 |
| Lee Vining | 10:35:24 | -46.3 | Dark | Down | 49.0 | 258.6 | Up | 10:21:31 - 10:49:17 | 205 |
| Kingman/Dolan Springs | 10:35:05 | -44.0 | Dark | Up | 45.4 | 265.2 | Up | 10:21:12 - 10:48:58 | 190 |
| Bishop | 10:35:21 | -46.1 | Dark | Down | 48.6 | 259.8 | Up | 10:21:28 - 10:49:14 | 186 |
| Laughlin/Bullhead City | 10:35:06 | -44.4 | Dark | Up | 45.8 | 264.9 | Up | 10:21:13 - 10:48:59 | 166 |
| George/Scottsdale | 10:34:56 | -43.0 | Dark | Up | 43.7 | 268.0 | Up | 10:21:03 - 10:48:49 | 164 |
| Mohave Valley | 10:35:05 | -44.5 | Dark | Up | 45.9 | 265.1 | Up | 10:21:12 - 10:48:58 | 144 |
| Lake Havasu City | 10:35:03 | -44.5 | Dark | Up | 45.7 | 265.7 | Up | 10:21:10 - 10:48:56 | 122 |
| Parker | 10:35:02 | -44.7 | Dark | Up | 45.7 | 266.1 | Up | 10:21:09 - 10:48:55 | 94 |
| Blythe | 10:35:01 | -45.1 | Dark | Up | 46.0 | 266.4 | Up | 10:21:08 - 10:48:54 | 39 |
| Yuma | 10:34:59 | -45.5 | Dark | Up | 46.1 | 267.4 | Up | 10:21:06 - 10:48:52 | -40 |
| Idyllwild | 10:35:06 | -46.6 | Dark | Up | 47.7 | 265.0 | Up | 10:21:13 - 10:48:59 | -41 |
| Calipatria | 10:35:02 | -46.0 | Dark | Up | 46.8 | 266.4 | Up | 10:21:09 - 10:48:55 | -42 |
| CPSLO | 10:35:20 | -48.7 | Dark | Down | 50.7 | 260.5 | Up | 10:21:27 - 10:49:13 | -77 |
| Wildwood | 10:35:11 | -47.9 | Dark | Up | 49.2 | 263.4 | Up | 10:21:18 - 10:49:04 | -92 |
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 535990, (2022/02/25 10:37UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 9.30 117 PPM 100044 10:02:48.9 +21:56:57 5.4 0.95 121 PPM 100085 10:06:10.7 +21:30:53 8.1 0.32 121 PPM 100072 10:05:01.2 +21:18:34 10.7 0.14 121 535990 10:05:30.9 +21:14:15 16.4 121 Positions are for J2000
Event circumstances last updated at 2021/12/07 01:45:56 UT
Marc W. Buie, Southwest Research Institute