Event between (524834) 03YL179 and star GA1120:01885961 with event index number of 1592975
Geocentric closest approach at 2020/02/21 07:53:55 UTC
J2000 position of star is 06:11:29.6 +22:53:26
Equinox of date position of star is 06:12:40.6 +22:53:05
Stellar brightness G=16.8,
use SENSEUP=128
Star is 146 degrees from the moon.
Moon is 5% illuminated.
TNO apparent brightness V=23.3
[RECON map]
TNO is 38.7 AU from the Sun
and 38.2 AU from the Earth.
The TNO is moving 11.0
km/sec on the sky relative to the star, or,
1.4 arcsec/hr.
The 1-sigma error in the time of the event is 513 seconds.
The 1-sigma cross-track error in the shadow position is
2267 km.
The sky-plane scale is
27717.6 km/arcsec.
The TNO has an absolute magnitude Hv=7.3
Diameter=208.9 km assuming a 5% albedo -- 19.0 sec chord
Diameter=85.3 km assuming a 30% albedo -- 7.8 sec chord
Dynamical classification is CLASSICAL
Star training set for 524834, (2020/02/21 07:54UT) Object RA Dec mag sep mel Betelgeuse 05:56:15.8 +07:24:33 0.4 15.97 139 Alhena 06:38:52.5 +16:22:49 1.9 8.95 151 3 Gem 06:10:57.4 +23:06:30 5.5 0.46 146 6 Gem 06:13:32.4 +22:54:08 8.4 0.19 146 PPM 095558 06:12:11.9 +22:48:43 11.0 0.14 146 524834 06:12:42.9 +22:53:04 16.8 147 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
1.8 sigma about the mid-time.
The median site spacing is 20.2 km
RECON observability=1.0 and success probability=0.2%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Kelowna | 07:48:45 | -50.5 | Dark | Down | 39.2 | 259.0 | Up | 07:33:45 - 08:03:45 | 10515 |
| Summerland | 07:48:45 | -50.8 | Dark | Down | 39.5 | 259.0 | Up | 07:33:45 - 08:03:45 | 10483 |
| Penticton | 07:48:43 | -50.9 | Dark | Down | 39.4 | 259.2 | Up | 07:33:43 - 08:03:43 | 10480 |
| Okanagan Falls | 07:48:43 | -51.1 | Dark | Down | 39.5 | 259.3 | Up | 07:33:43 - 08:03:43 | 10464 |
| Oliver | 07:48:42 | -51.2 | Dark | Down | 39.5 | 259.5 | Up | 07:33:42 - 08:03:42 | 10450 |
| Anarchist Mountain Observatory | 07:48:39 | -51.4 | Dark | Down | 39.4 | 259.8 | Up | 07:33:39 - 08:03:39 | 10441 |
| Oroville | 07:48:40 | -51.5 | Dark | Down | 39.5 | 259.8 | Up | 07:33:40 - 08:03:40 | 10432 |
| Tonasket | 07:48:39 | -51.7 | Dark | Down | 39.5 | 260.0 | Up | 07:33:39 - 08:03:39 | 10413 |
| Okanogan | 07:48:37 | -52.0 | Dark | Down | 39.7 | 260.1 | Up | 07:33:37 - 08:03:37 | 10380 |
| Brewster | 07:48:37 | -52.3 | Dark | Down | 39.8 | 260.1 | Up | 07:33:37 - 08:03:37 | 10352 |
| Manson/Chelan | 07:48:36 | -52.4 | Dark | Down | 40.1 | 260.0 | Up | 07:33:36 - 08:03:36 | 10325 |
| Wenatchee | 07:48:33 | -52.9 | Dark | Down | 40.3 | 260.2 | Up | 07:33:33 - 08:03:33 | 10280 |
| Ellensburg | 07:48:30 | -53.3 | Dark | Down | 40.5 | 260.4 | Up | 07:33:30 - 08:03:30 | 10239 |
| Pasco | 07:48:23 | -54.2 | Dark | Down | 39.7 | 262.2 | Up | 07:33:23 - 08:03:23 | 10209 |
| Yakima | 07:48:29 | -53.7 | Dark | Down | 40.6 | 260.7 | Up | 07:33:29 - 08:03:29 | 10203 |
| PNWRO | 07:48:20 | -54.4 | Dark | Down | 39.6 | 262.5 | Up | 07:33:20 - 08:03:20 | 10193 |
| Toppenish/White Swan | 07:48:27 | -53.9 | Dark | Down | 40.6 | 261.0 | Up | 07:33:27 - 08:03:27 | 10188 |
| George/Umatilla | 07:48:20 | -54.5 | Dark | Down | 39.9 | 262.2 | Up | 07:33:20 - 08:03:20 | 10174 |
| Goldendale | 07:48:26 | -54.4 | Dark | Down | 40.9 | 261.2 | Up | 07:33:26 - 08:03:26 | 10128 |
| The Dalles | 07:48:26 | -54.5 | Dark | Down | 41.2 | 261.1 | Up | 07:33:26 - 08:03:26 | 10099 |
| Maupin | 07:48:22 | -55.0 | Dark | Down | 41.2 | 261.5 | Up | 07:33:22 - 08:03:22 | 10064 |
| SwRI | 07:46:55 | -59.9 | Dark | Down | 30.0 | 275.9 | Low | 07:31:55 - 08:01:55 | 10057 |
| Madras/Culver | 07:48:21 | -55.5 | Dark | Down | 41.3 | 261.9 | Up | 07:33:21 - 08:03:21 | 10014 |
| Redmond | 07:48:18 | -55.8 | Dark | Down | 41.4 | 262.2 | Up | 07:33:18 - 08:03:18 | 9981 |
| Sisters | 07:48:22 | -55.7 | Dark | Down | 41.7 | 261.9 | Up | 07:33:22 - 08:03:22 | 9973 |
| Bend | 07:48:17 | -56.0 | Dark | Down | 41.6 | 262.3 | Up | 07:33:17 - 08:03:17 | 9958 |
| Oregon Observatory | 07:48:17 | -56.2 | Dark | Down | 41.7 | 262.3 | Up | 07:33:17 - 08:03:17 | 9938 |
| La Pine/Gilchrist | 07:48:16 | -56.3 | Dark | Down | 41.8 | 262.4 | Up | 07:33:16 - 08:03:16 | 9918 |
| North Lake | 07:48:11 | -56.9 | Dark | Down | 41.4 | 263.3 | Up | 07:33:11 - 08:03:11 | 9894 |
| Paisley | 07:48:06 | -57.5 | Dark | Down | 41.2 | 264.0 | Up | 07:33:06 - 08:03:06 | 9853 |
| Lakeview | 07:48:03 | -58.0 | Dark | Down | 41.1 | 264.6 | Up | 07:33:03 - 08:03:03 | 9812 |
| Chiloquin | 07:48:13 | -57.3 | Dark | Down | 42.2 | 263.2 | Up | 07:33:13 - 08:03:13 | 9807 |
| Klamath Falls | 07:48:09 | -57.7 | Dark | Down | 42.2 | 263.5 | Up | 07:33:09 - 08:03:09 | 9778 |
| Tulelake | 07:48:06 | -58.0 | Dark | Down | 42.0 | 264.0 | Up | 07:33:06 - 08:03:06 | 9761 |
| Cedarville | 07:47:58 | -58.6 | Dark | Down | 41.1 | 265.3 | Up | 07:32:58 - 08:02:58 | 9756 |
| Fall River/Burney | 07:48:01 | -58.9 | Dark | Down | 42.0 | 264.8 | Up | 07:33:01 - 08:03:01 | 9678 |
| Susanville | 07:47:54 | -59.6 | Dark | Down | 41.5 | 265.9 | Up | 07:32:54 - 08:02:54 | 9640 |
| Gimple | 07:47:53 | -59.9 | Dark | Down | 41.7 | 266.0 | Up | 07:32:53 - 08:02:53 | 9608 |
| Greenville | 07:47:54 | -59.9 | Dark | Down | 41.8 | 265.9 | Up | 07:32:54 - 08:02:54 | 9606 |
| Portola | 07:47:50 | -60.3 | Dark | Down | 41.4 | 266.5 | Up | 07:32:50 - 08:02:50 | 9588 |
| Quincy | 07:47:53 | -60.1 | Dark | Down | 41.8 | 266.1 | Up | 07:32:53 - 08:02:53 | 9587 |
| Reno | 07:47:45 | -60.6 | Dark | Down | 41.0 | 267.2 | Up | 07:32:45 - 08:02:45 | 9581 |
| Carson City | 07:47:44 | -61.0 | Dark | Down | 41.0 | 267.5 | Up | 07:32:44 - 08:02:44 | 9548 |
| Yerington | 07:47:40 | -61.3 | Dark | Down | 40.5 | 268.1 | Up | 07:32:40 - 08:02:40 | 9547 |
| Gardnerville | 07:47:42 | -61.2 | Dark | Down | 40.9 | 267.8 | Up | 07:32:42 - 08:02:42 | 9526 |
| Hawthorne | 07:47:35 | -61.8 | Dark | Down | 40.1 | 268.8 | Up | 07:32:35 - 08:02:35 | 9519 |
| Tonopah | 07:47:25 | -62.4 | Dark | Down | 39.0 | 270.1 | Up | 07:32:25 - 08:02:25 | 9516 |
| Lee Vining | 07:47:34 | -62.3 | Dark | Down | 40.5 | 269.0 | Up | 07:32:34 - 08:02:34 | 9451 |
| Indian Springs | 07:47:11 | -64.1 | Dark | Down | 37.8 | 272.1 | Up | 07:32:11 - 08:02:11 | 9421 |
| Beatty | 07:47:17 | -63.6 | Dark | Down | 38.7 | 271.3 | Up | 07:32:17 - 08:02:17 | 9420 |
| Bishop | 07:47:28 | -63.0 | Dark | Down | 40.0 | 269.9 | Up | 07:32:28 - 08:02:28 | 9415 |
| Henderson | 07:47:06 | -64.6 | Dark | Down | 37.3 | 272.9 | Up | 07:32:06 - 08:02:06 | 9392 |
| Patrick | 07:46:57 | -65.3 | Dark | Down | 36.3 | 274.0 | Up | 07:31:57 - 08:01:57 | 9367 |
| Lone Pine | 07:47:22 | -63.8 | Dark | Down | 39.7 | 270.7 | Up | 07:32:22 - 08:02:22 | 9353 |
| Kingman/Dolan Springs | 07:46:59 | -65.5 | Dark | Down | 36.5 | 274.0 | Up | 07:31:59 - 08:01:59 | 9340 |
| Searchlight/Boulder City | 07:47:01 | -65.2 | Dark | Down | 37.2 | 273.4 | Up | 07:32:01 - 08:02:01 | 9339 |
| Laughlin/Bullhead City | 07:47:00 | -65.5 | Dark | Down | 36.9 | 273.8 | Up | 07:32:00 - 08:02:00 | 9321 |
| Mohave Valley | 07:46:59 | -65.8 | Dark | Down | 36.9 | 274.0 | Up | 07:31:59 - 08:01:59 | 9296 |
| Lake Havasu City | 07:46:54 | -66.2 | Dark | Down | 36.7 | 274.4 | Up | 07:31:54 - 08:01:54 | 9265 |
| Parker | 07:46:52 | -66.6 | Dark | Down | 36.6 | 274.7 | Up | 07:31:52 - 08:01:52 | 9232 |
| Blythe | 07:46:52 | -67.1 | Dark | Down | 36.8 | 274.9 | Up | 07:31:52 - 08:01:52 | 9172 |
| CPSLO | 07:47:29 | -64.6 | Dark | Down | 41.8 | 270.4 | Up | 07:32:29 - 08:02:29 | 9151 |
| Idyllwild | 07:47:02 | -66.8 | Dark | Down | 38.6 | 273.8 | Up | 07:32:02 - 08:02:02 | 9117 |
| Calipatria | 07:46:54 | -67.5 | Dark | Down | 37.6 | 274.8 | Up | 07:31:54 - 08:01:54 | 9095 |
| Wildwood | 07:47:13 | -66.1 | Dark | Down | 40.1 | 272.5 | Up | 07:32:13 - 08:02:13 | 9094 |
| Yuma | 07:46:48 | -68.0 | Dark | Down | 36.8 | 275.6 | Up | 07:31:48 - 08:01:48 | 9081 |
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 524834, (2020/02/21 07:54UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 15.97 139 Alhena 06:37:42.8 +16:23:57 1.9 8.95 151 3 Gem 06:09:44.0 +23:06:48 5.5 0.46 146 6 Gem 06:12:19.1 +22:54:30 8.4 0.19 146 PPM 095558 06:10:58.7 +22:49:04 11.0 0.14 146 524834 06:11:29.6 +22:53:26 16.8 146 Positions are for J2000
Event circumstances last updated at 2019/07/02 02:30:21 UT
Marc W. Buie, Southwest Research Institute