Event between (143991) 03YO179 and star GA1200:02216537 with event index number of 1639292
Geocentric closest approach at 2021/01/16 08:26:23 UTC
J2000 position of star is 06:02:23.4 +31:50:55
Equinox of date position of star is 06:03:45.2 +31:50:49
Stellar brightness G=16.2,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 115 degrees from the moon.
Moon is 11% illuminated.
TNO apparent brightness V=21.8
[RECON map]
TNO is 39.6 AU from the Sun
and 38.7 AU from the Earth.
The TNO is moving 22.6
km/sec on the sky relative to the star, or,
2.9 arcsec/hr.
The 1-sigma error in the time of the event is 62 seconds.
The 1-sigma cross-track error in the shadow position is
1404 km.
The sky-plane scale is
28069.5 km/arcsec.
The TNO has an absolute magnitude Hv=5.8
Diameter=416.9 km assuming a 5% albedo -- 18.4 sec chord
Diameter=170.2 km assuming a 30% albedo -- 7.5 sec chord
Dynamical classification is SCATEXTD
Star training set for 143991, (2021/01/16 08:26UT) Object RA Dec mag sep mel Pollux 07:46:36.0 +27:58:25 1.1 22.57 138 Alnath 05:27:37.4 +28:37:24 1.6 8.44 107 PPM 071108 06:02:31.6 +31:02:01 6.0 0.85 115 PPM 071103 06:02:15.1 +31:57:41 8.0 0.34 115 PPM 071149 06:04:40.2 +32:02:39 9.5 0.28 116 PPM 071116 06:02:48.3 +31:55:06 10.2 0.21 115 143991 06:03:45.5 +31:50:49 16.2 116 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 23.2 km
RECON observability=1.0 and success probability=1.8%
| 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 | 08:24:47 | -60.4 | Dark | Down | 59.9 | 244.7 | Up | 08:19:07 - 08:30:27 | -4089 |
| Kelowna | 08:24:47 | -60.8 | Dark | Down | 60.1 | 245.1 | Up | 08:19:07 - 08:30:27 | -4130 |
| Peachland | 08:24:48 | -60.9 | Dark | Down | 60.3 | 244.9 | Up | 08:19:08 - 08:30:28 | -4147 |
| Summerland | 08:24:47 | -61.1 | Dark | Down | 60.4 | 245.3 | Up | 08:19:07 - 08:30:27 | -4160 |
| Penticton | 08:24:46 | -61.1 | Dark | Down | 60.3 | 245.5 | Up | 08:19:06 - 08:30:26 | -4165 |
| Oliver | 08:24:46 | -61.5 | Dark | Down | 60.5 | 246.1 | Up | 08:19:06 - 08:30:26 | -4200 |
| Anarchist Mountain Observatory | 08:24:45 | -61.6 | Dark | Down | 60.4 | 246.6 | Up | 08:19:05 - 08:30:25 | -4213 |
| Tonasket | 08:24:44 | -62.0 | Dark | Down | 60.6 | 247.0 | Up | 08:19:04 - 08:30:24 | -4246 |
| Okanogan | 08:24:44 | -62.3 | Dark | Down | 60.8 | 247.4 | Up | 08:19:04 - 08:30:24 | -4282 |
| Brewster | 08:24:44 | -62.6 | Dark | Down | 61.0 | 247.6 | Up | 08:19:04 - 08:30:24 | -4314 |
| Victoria | 08:24:56 | -62.3 | Dark | Down | 63.0 | 242.3 | Up | 08:19:16 - 08:30:36 | -4338 |
| Manson/Chelan | 08:24:45 | -62.8 | Dark | Down | 61.3 | 247.5 | Up | 08:19:05 - 08:30:25 | -4342 |
| Entiat | 08:24:45 | -63.1 | Dark | Down | 61.5 | 247.8 | Up | 08:19:05 - 08:30:25 | -4366 |
| Wenatchee | 08:24:45 | -63.3 | Dark | Down | 61.6 | 248.1 | Up | 08:19:05 - 08:30:25 | -4394 |
| Ellensburg | 08:24:45 | -63.7 | Dark | Down | 61.9 | 248.5 | Up | 08:19:05 - 08:30:25 | -4440 |
| Yakima | 08:24:44 | -64.1 | Dark | Down | 62.1 | 249.2 | Up | 08:19:04 - 08:30:24 | -4482 |
| Pasco | 08:24:39 | -64.3 | Dark | Down | 61.3 | 251.4 | Up | 08:18:59 - 08:30:19 | -4487 |
| Toppenish/White Swan | 08:24:43 | -64.3 | Dark | Down | 62.0 | 249.8 | Up | 08:19:03 - 08:30:23 | -4500 |
| PNWRO | 08:24:38 | -64.6 | Dark | Down | 61.2 | 252.1 | Up | 08:18:58 - 08:30:18 | -4507 |
| Goldendale | 08:24:43 | -64.9 | Dark | Down | 62.5 | 250.3 | Up | 08:19:03 - 08:30:23 | -4565 |
| The Dalles | 08:24:44 | -65.2 | Dark | Down | 62.8 | 250.3 | Up | 08:19:04 - 08:30:24 | -4596 |
| Maupin | 08:24:42 | -65.6 | Dark | Down | 62.9 | 251.1 | Up | 08:19:02 - 08:30:22 | -4637 |
| Redmond | 08:24:42 | -66.5 | Dark | Down | 63.2 | 252.7 | Up | 08:19:02 - 08:30:22 | -4732 |
| Sisters | 08:24:43 | -66.5 | Dark | Down | 63.5 | 252.2 | Up | 08:19:03 - 08:30:23 | -4738 |
| Niwot | 08:23:49 | -65.2 | Dark | Down | 52.2 | 272.3 | Up | 08:18:09 - 08:29:29 | -4742 |
| SwRI | 08:23:49 | -65.3 | Dark | Down | 52.2 | 272.4 | Up | 08:18:09 - 08:29:29 | -4756 |
| Bend | 08:24:42 | -66.7 | Dark | Down | 63.4 | 253.0 | Up | 08:19:02 - 08:30:22 | -4757 |
| Oregon Observatory | 08:24:42 | -66.9 | Dark | Down | 63.5 | 253.2 | Up | 08:19:02 - 08:30:22 | -4778 |
| La Pine/Gilchrist | 08:24:42 | -67.1 | Dark | Down | 63.6 | 253.5 | Up | 08:19:02 - 08:30:22 | -4800 |
| North Lake | 08:24:39 | -67.5 | Dark | Down | 63.4 | 255.0 | Up | 08:18:59 - 08:30:19 | -4833 |
| Paisley | 08:24:38 | -68.0 | Dark | Down | 63.2 | 256.4 | Up | 08:18:58 - 08:30:18 | -4883 |
| Lakeview | 08:24:36 | -68.5 | Dark | Down | 63.2 | 257.6 | Up | 08:18:56 - 08:30:16 | -4932 |
| Klamath Falls | 08:24:40 | -68.6 | Dark | Down | 64.2 | 256.1 | Up | 08:19:00 - 08:30:20 | -4958 |
| Cedarville | 08:24:34 | -69.1 | Dark | Down | 63.2 | 259.0 | Up | 08:18:54 - 08:30:14 | -4996 |
| Fall River/Burney | 08:24:37 | -69.7 | Dark | Down | 64.2 | 258.8 | Up | 08:18:57 - 08:30:17 | -5073 |
| Susanville | 08:24:34 | -70.3 | Dark | Down | 63.8 | 260.8 | Up | 08:18:54 - 08:30:14 | -5124 |
| Gimple | 08:24:34 | -70.6 | Dark | Down | 64.0 | 261.1 | Up | 08:18:54 - 08:30:14 | -5157 |
| Greenville | 08:24:35 | -70.6 | Dark | Down | 64.0 | 261.1 | Up | 08:18:55 - 08:30:15 | -5159 |
| Quincy | 08:24:34 | -70.8 | Dark | Down | 64.1 | 261.5 | Up | 08:18:54 - 08:30:14 | -5180 |
| Portola | 08:24:32 | -70.9 | Dark | Down | 63.7 | 262.1 | Up | 08:18:52 - 08:30:12 | -5183 |
| Reno | 08:24:30 | -71.0 | Dark | Down | 63.3 | 263.2 | Up | 08:18:50 - 08:30:10 | -5197 |
| Carson City | 08:24:30 | -71.4 | Dark | Down | 63.3 | 263.9 | Up | 08:18:50 - 08:30:10 | -5234 |
| Yerington | 08:24:27 | -71.5 | Dark | Down | 62.8 | 264.8 | Up | 08:18:47 - 08:30:07 | -5240 |
| Gardnerville | 08:24:29 | -71.6 | Dark | Down | 63.3 | 264.4 | Up | 08:18:49 - 08:30:09 | -5259 |
| Hawthorne | 08:24:25 | -71.8 | Dark | Down | 62.5 | 266.1 | Up | 08:18:45 - 08:30:05 | -5276 |
| Tonopah | 08:24:19 | -71.9 | Dark | Down | 61.4 | 267.9 | Up | 08:18:39 - 08:29:59 | -5291 |
| Lee Vining | 08:24:25 | -72.5 | Dark | Down | 62.9 | 266.8 | Up | 08:18:45 - 08:30:05 | -5347 |
| Bishop | 08:24:22 | -72.9 | Dark | Down | 62.4 | 268.5 | Up | 08:18:42 - 08:30:02 | -5393 |
| Beatty | 08:24:16 | -72.9 | Dark | Down | 61.1 | 270.3 | Up | 08:18:36 - 08:29:56 | -5401 |
| Indian Springs | 08:24:13 | -72.8 | Dark | Down | 60.2 | 271.5 | Up | 08:18:33 - 08:29:53 | -5407 |
| Henderson | 08:24:09 | -73.1 | Dark | Down | 59.6 | 272.8 | Up | 08:18:29 - 08:29:49 | -5445 |
| Patrick | 08:24:04 | -73.1 | Dark | Down | 58.7 | 274.4 | Up | 08:18:24 - 08:29:44 | -5480 |
| DCO | 08:24:02 | -73.1 | Dark | Down | 58.1 | 275.2 | Up | 08:18:22 - 08:29:42 | -5492 |
| Searchlight/Boulder City | 08:24:08 | -73.5 | Dark | Down | 59.6 | 273.8 | Up | 08:18:28 - 08:29:48 | -5503 |
| Kingman/Dolan Springs | 08:24:05 | -73.4 | Dark | Down | 58.9 | 274.7 | Up | 08:18:25 - 08:29:45 | -5508 |
| Laughlin/Bullhead City | 08:24:06 | -73.7 | Dark | Down | 59.3 | 274.5 | Up | 08:18:26 - 08:29:46 | -5525 |
| Mohave Valley | 08:24:06 | -73.9 | Dark | Down | 59.2 | 274.9 | Up | 08:18:26 - 08:29:46 | -5554 |
| Lake Havasu City | 08:24:05 | -74.1 | Dark | Down | 59.0 | 275.7 | Up | 08:18:25 - 08:29:45 | -5589 |
| George/Scottsdale | 08:23:55 | -73.5 | Dark | Down | 56.9 | 277.9 | Up | 08:18:15 - 08:29:35 | -5599 |
| Parker | 08:24:04 | -74.4 | Dark | Down | 58.9 | 276.3 | Up | 08:18:24 - 08:29:44 | -5625 |
| CPSLO | 08:24:27 | -75.3 | Dark | Down | 64.2 | 271.2 | Up | 08:18:47 - 08:30:07 | -5665 |
| Blythe | 08:24:04 | -75.0 | Dark | Down | 59.1 | 277.1 | Up | 08:18:24 - 08:29:44 | -5688 |
| Idyllwild | 08:24:11 | -75.8 | Dark | Down | 60.9 | 276.0 | Up | 08:18:31 - 08:29:51 | -5734 |
| Wildwood | 08:24:18 | -76.0 | Dark | Down | 62.4 | 274.6 | Up | 08:18:38 - 08:29:58 | -5744 |
| Calipatria | 08:24:06 | -75.8 | Dark | Down | 59.8 | 277.5 | Up | 08:18:26 - 08:29:46 | -5766 |
| Yuma | 08:24:03 | -75.7 | Dark | Down | 59.0 | 278.6 | Up | 08:18:23 - 08:29:43 | -5787 |
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 143991, (2021/01/16 08:26UT) Object RA Dec mag sep mel Pollux 07:45:18.0 +28:01:33 1.1 22.57 138 Alnath 05:26:17.5 +28:36:23 1.6 8.44 107 PPM 071108 06:01:10.0 +31:02:04 6.0 0.85 115 PPM 071103 06:00:52.8 +31:57:43 8.0 0.34 115 PPM 071149 06:03:17.9 +32:02:46 9.5 0.28 116 PPM 071116 06:01:26.0 +31:55:10 10.2 0.21 115 143991 06:02:23.4 +31:50:55 16.2 115 Positions are for J2000
Event circumstances last updated at 2020/12/16 22:08:26 UT
Marc W. Buie, Southwest Research Institute