Event between (523757) 14WH509 and star GA1220:03363091 with event index number of 355180
Geocentric closest approach at 2020/01/31 09:12:39 UTC
J2000 position of star is 08:52:33.3 +32:36:35
Equinox of date position of star is 08:53:46.5 +32:32:03
Stellar brightness G=14.2,
use SENSEUP=64
Star is 105 degrees from the moon.
Moon is 34% illuminated.
TNO apparent brightness V=21.5
[RECON map]
TNO is 42.7 AU from the Sun
and 41.8 AU from the Earth.
The TNO is moving 25.7
km/sec on the sky relative to the star, or,
3.1 arcsec/hr.
The 1-sigma error in the time of the event is 85 seconds.
The 1-sigma cross-track error in the shadow position is
1702 km.
The sky-plane scale is
30282.5 km/arcsec.
The TNO has an absolute magnitude Hv=5.2
Diameter=549.6 km assuming a 5% albedo -- 21.4 sec chord
Diameter=224.4 km assuming a 30% albedo -- 8.7 sec chord
Dynamical classification is SCATEXTD
Star training set for 523757, (2020/01/31 09:13UT) Object RA Dec mag sep mel Pollux 07:46:32.5 +27:58:34 1.1 15.20 91 66 Cnc 09:02:37.7 +32:10:22 5.9 1.90 107 PPM 074024 08:51:46.8 +33:12:31 6.7 0.80 104 PPM 074032 08:52:07.5 +32:15:07 9.9 0.45 105 523757 08:53:47.6 +32:31:59 14.2 105 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 21.1 km
RECON observability=1.0 and success probability=1.5%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Clarence Fulton | 09:12:22 | -55.0 | Dark | Down | 68.9 | 219.3 | Up | 09:04:49 - 09:19:55 | -5038 |
| Kelowna | 09:12:22 | -55.4 | Dark | Down | 69.3 | 219.6 | Up | 09:04:49 - 09:19:55 | -5079 |
| Summerland | 09:12:22 | -55.7 | Dark | Down | 69.5 | 219.6 | Up | 09:04:49 - 09:19:55 | -5110 |
| Penticton | 09:12:21 | -55.7 | Dark | Down | 69.5 | 220.0 | Up | 09:04:48 - 09:19:54 | -5113 |
| Oliver | 09:12:21 | -56.0 | Dark | Down | 69.8 | 220.6 | Up | 09:04:48 - 09:19:54 | -5146 |
| Anarchist Mountain Observatory | 09:12:20 | -56.1 | Dark | Down | 69.9 | 221.3 | Up | 09:04:47 - 09:19:53 | -5156 |
| Tonasket | 09:12:20 | -56.4 | Dark | Down | 70.1 | 221.7 | Up | 09:04:47 - 09:19:53 | -5187 |
| Okanogan | 09:12:19 | -56.7 | Dark | Down | 70.4 | 222.0 | Up | 09:04:46 - 09:19:52 | -5224 |
| Brewster | 09:12:19 | -57.0 | Dark | Down | 70.7 | 222.1 | Up | 09:04:46 - 09:19:52 | -5256 |
| Manson/Chelan | 09:12:20 | -57.3 | Dark | Down | 71.0 | 221.7 | Up | 09:04:47 - 09:19:53 | -5287 |
| Entiat | 09:12:20 | -57.6 | Dark | Down | 71.2 | 222.0 | Up | 09:04:47 - 09:19:53 | -5310 |
| Victoria | 09:12:29 | -57.6 | Dark | Down | 71.8 | 213.0 | Up | 09:04:56 - 09:20:02 | -5323 |
| Wenatchee | 09:12:19 | -57.8 | Dark | Down | 71.5 | 222.2 | Up | 09:04:46 - 09:19:52 | -5337 |
| Ellensburg | 09:12:19 | -58.3 | Dark | Down | 71.9 | 222.6 | Up | 09:04:46 - 09:19:52 | -5384 |
| Pasco | 09:12:14 | -58.5 | Dark | Down | 71.7 | 227.3 | Up | 09:04:41 - 09:19:47 | -5410 |
| Yakima | 09:12:19 | -58.6 | Dark | Down | 72.2 | 223.4 | Up | 09:04:46 - 09:19:52 | -5423 |
| PNWRO | 09:12:13 | -58.6 | Dark | Down | 71.8 | 228.3 | Up | 09:04:40 - 09:19:46 | -5426 |
| Toppenish/White Swan | 09:12:18 | -58.8 | Dark | Down | 72.3 | 224.2 | Up | 09:04:45 - 09:19:51 | -5439 |
| Niwot | 09:11:25 | -56.0 | Dark | Down | 65.1 | 261.9 | Up | 09:03:52 - 09:18:58 | -5452 |
| SwRI | 09:11:25 | -56.2 | Dark | Down | 65.2 | 262.0 | Up | 09:03:52 - 09:18:58 | -5466 |
| Goldendale | 09:12:17 | -59.4 | Dark | Down | 72.9 | 224.5 | Up | 09:04:44 - 09:19:50 | -5505 |
| The Dalles | 09:12:18 | -59.7 | Dark | Down | 73.2 | 224.1 | Up | 09:04:45 - 09:19:51 | -5539 |
| Maupin | 09:12:17 | -60.0 | Dark | Down | 73.5 | 225.4 | Up | 09:04:44 - 09:19:50 | -5576 |
| Redmond | 09:12:15 | -60.9 | Dark | Down | 74.1 | 227.4 | Up | 09:04:42 - 09:19:48 | -5667 |
| Sisters | 09:12:17 | -61.0 | Dark | Down | 74.3 | 226.4 | Up | 09:04:44 - 09:19:50 | -5678 |
| Bend | 09:12:16 | -61.1 | Dark | Down | 74.3 | 227.6 | Up | 09:04:43 - 09:19:49 | -5692 |
| Oregon Observatory | 09:12:15 | -61.3 | Dark | Down | 74.5 | 227.7 | Up | 09:04:42 - 09:19:48 | -5714 |
| La Pine/Gilchrist | 09:12:15 | -61.5 | Dark | Down | 74.7 | 228.2 | Up | 09:04:42 - 09:19:48 | -5736 |
| North Lake | 09:12:12 | -61.7 | Dark | Down | 74.7 | 230.8 | Up | 09:04:39 - 09:19:45 | -5758 |
| Paisley | 09:12:11 | -62.1 | Dark | Down | 74.8 | 233.2 | Up | 09:04:38 - 09:19:44 | -5801 |
| Lakeview | 09:12:09 | -62.4 | Dark | Down | 75.0 | 235.1 | Up | 09:04:36 - 09:19:42 | -5844 |
| Klamath Falls | 09:12:14 | -62.9 | Dark | Down | 75.8 | 231.7 | Up | 09:04:41 - 09:19:47 | -5888 |
| Cedarville | 09:12:07 | -62.9 | Dark | Down | 75.2 | 237.6 | Up | 09:04:34 - 09:19:40 | -5902 |
| Fall River/Burney | 09:12:10 | -63.8 | Dark | Down | 76.3 | 236.4 | Up | 09:04:37 - 09:19:43 | -5992 |
| Susanville | 09:12:07 | -64.1 | Dark | Down | 76.1 | 240.3 | Up | 09:04:34 - 09:19:40 | -6029 |
| Gimple | 09:12:07 | -64.4 | Dark | Down | 76.4 | 240.8 | Up | 09:04:34 - 09:19:40 | -6064 |
| Greenville | 09:12:08 | -64.4 | Dark | Down | 76.5 | 240.6 | Up | 09:04:35 - 09:19:41 | -6066 |
| Portola | 09:12:06 | -64.5 | Dark | Down | 76.3 | 242.8 | Up | 09:04:33 - 09:19:39 | -6082 |
| Reno | 09:12:03 | -64.4 | Dark | Down | 76.0 | 245.1 | Up | 09:04:30 - 09:19:36 | -6086 |
| Quincy | 09:12:07 | -64.6 | Dark | Down | 76.6 | 241.3 | Up | 09:04:34 - 09:19:40 | -6086 |
| Yerington | 09:12:00 | -64.6 | Dark | Down | 75.7 | 248.3 | Up | 09:04:27 - 09:19:33 | -6117 |
| Carson City | 09:12:03 | -64.7 | Dark | Down | 76.1 | 246.4 | Up | 09:04:30 - 09:19:36 | -6120 |
| Tonopah | 09:11:52 | -64.4 | Dark | Down | 74.6 | 254.6 | Up | 09:04:19 - 09:19:25 | -6136 |
| Gardnerville | 09:12:01 | -64.9 | Dark | Down | 76.2 | 247.4 | Up | 09:04:28 - 09:19:34 | -6143 |
| Hawthorne | 09:11:58 | -64.7 | Dark | Down | 75.5 | 250.9 | Up | 09:04:25 - 09:19:31 | -6143 |
| Lee Vining | 09:11:58 | -65.4 | Dark | Down | 76.1 | 252.2 | Up | 09:04:25 - 09:19:31 | -6217 |
| Indian Springs | 09:11:46 | -64.6 | Dark | Down | 73.7 | 261.5 | Up | 09:04:13 - 09:19:19 | -6222 |
| Beatty | 09:11:49 | -65.0 | Dark | Down | 74.5 | 259.3 | Up | 09:04:16 - 09:19:22 | -6232 |
| Henderson | 09:11:42 | -64.6 | Dark | Down | 73.3 | 264.0 | Up | 09:04:09 - 09:19:15 | -6247 |
| Bishop | 09:11:55 | -65.5 | Dark | Down | 75.7 | 255.5 | Up | 09:04:22 - 09:19:28 | -6249 |
| Patrick | 09:11:38 | -64.3 | Dark | Down | 72.4 | 266.9 | Up | 09:04:05 - 09:19:11 | -6262 |
| DCO | 09:11:34 | -64.1 | Dark | Down | 71.9 | 268.3 | Up | 09:04:01 - 09:19:07 | -6262 |
| Kingman/Dolan Springs | 09:11:38 | -64.6 | Dark | Down | 72.6 | 267.4 | Up | 09:04:05 - 09:19:11 | -6292 |
| Searchlight/Boulder City | 09:11:42 | -64.9 | Dark | Down | 73.3 | 265.9 | Up | 09:04:09 - 09:19:15 | -6300 |
| Laughlin/Bullhead City | 09:11:40 | -64.9 | Dark | Down | 73.0 | 267.1 | Up | 09:04:07 - 09:19:13 | -6315 |
| Mohave Valley | 09:11:39 | -65.1 | Dark | Down | 73.0 | 268.0 | Up | 09:04:06 - 09:19:12 | -6342 |
| George/Scottsdale | 09:11:28 | -64.0 | Dark | Down | 70.8 | 273.1 | Up | 09:03:55 - 09:19:01 | -6342 |
| Lake Havasu City | 09:11:37 | -65.2 | Dark | Down | 72.8 | 269.5 | Up | 09:04:04 - 09:19:10 | -6370 |
| Parker | 09:11:37 | -65.4 | Dark | Down | 72.8 | 270.6 | Up | 09:04:04 - 09:19:10 | -6404 |
| Blythe | 09:11:37 | -65.9 | Dark | Down | 73.0 | 272.2 | Up | 09:04:04 - 09:19:10 | -6468 |
| CPSLO | 09:11:57 | -68.3 | Dark | Down | 77.9 | 261.2 | Up | 09:04:24 - 09:19:30 | -6539 |
| Idyllwild | 09:11:43 | -67.2 | Dark | Down | 74.8 | 270.8 | Up | 09:04:10 - 09:19:16 | -6543 |
| Calipatria | 09:11:37 | -66.8 | Dark | Down | 73.8 | 273.5 | Up | 09:04:04 - 09:19:10 | -6555 |
| Yuma | 09:11:35 | -66.5 | Dark | Down | 73.0 | 275.2 | Up | 09:04:02 - 09:19:08 | -6560 |
| Wildwood | 09:11:50 | -68.1 | Dark | Down | 76.3 | 268.3 | Up | 09:04:17 - 09:19:23 | -6582 |
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 523757, (2020/01/31 09:13UT) Object RA Dec mag sep mel Pollux 07:45:18.0 +28:01:33 1.1 15.20 91 66 Cnc 09:01:24.1 +32:15:09 5.9 1.90 107 PPM 074024 08:50:32.1 +33:17:05 6.7 0.80 104 PPM 074032 08:50:53.3 +32:19:41 9.9 0.45 105 523757 08:52:33.3 +32:36:35 14.2 105 Positions are for J2000
Event circumstances last updated at 2019/10/15 22:06:48 UT
Marc W. Buie, Southwest Research Institute