Event between (181855) 98WT31 and star GA1300:02206367 with event index number of 1106170
Geocentric closest approach at 2022/01/25 07:06:21 UTC
J2000 position of star is 04:59:33.3 +41:38:55
Equinox of date position of star is 05:01:05.9 +41:40:49
Stellar brightness G=16.9,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 130 degrees from the moon.
Moon is 53% illuminated.
TNO apparent brightness V=23.5
[RECON map]
TNO is 37.6 AU from the Sun
and 36.9 AU from the Earth.
The TNO is moving 16.7
km/sec on the sky relative to the star, or,
2.2 arcsec/hr.
The 1-sigma error in the time of the event is 263 seconds.
The 1-sigma cross-track error in the shadow position is
2949 km.
The sky-plane scale is
26796.2 km/arcsec.
The TNO has an absolute magnitude Hv=7.7
Diameter=173.8 km assuming a 5% albedo -- 10.4 sec chord
Diameter=70.9 km assuming a 30% albedo -- 4.2 sec chord
Dynamical classification is SCATEXTD
Star training set for 181855, (2022/01/25 07:18UT) Object RA Dec mag sep mel Aldebaran 04:37:11.4 +16:33:07 0.8 25.65 142 3Iot Aur 04:58:26.1 +33:11:56 2.7 8.50 134 PPM 047658 05:04:51.7 +41:28:16 6.2 0.73 129 PPM 047575 05:01:16.1 +41:54:17 7.4 0.23 130 PPM 047578 05:01:27.2 +41:32:52 9.4 0.15 130 181855 05:01:06.5 +41:40:49 16.9 130 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
3.4 sigma about the mid-time.
The median site spacing is 26.8 km
RECON observability=1.0 and success probability=10.8%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Sleaford | 07:02:50 | -56.8 | Dark | Down | 55.4 | 272.6 | Up | 06:47:50 - 07:17:50 | -3765 |
| Kamloops | 07:03:40 | -55.4 | Dark | Down | 64.3 | 263.3 | Up | 06:48:40 - 07:18:40 | -4027 |
| Kelowna | 07:03:36 | -56.4 | Dark | Down | 63.8 | 265.7 | Up | 06:48:36 - 07:18:36 | -4116 |
| Peachland | 07:03:37 | -56.4 | Dark | Down | 64.0 | 265.7 | Up | 06:48:37 - 07:18:37 | -4129 |
| Summerland | 07:03:37 | -56.5 | Dark | Down | 63.9 | 266.1 | Up | 06:48:37 - 07:18:37 | -4145 |
| Penticton | 07:03:36 | -56.6 | Dark | Down | 63.9 | 266.3 | Up | 06:48:36 - 07:18:36 | -4152 |
| Oliver | 07:03:36 | -56.9 | Dark | Down | 63.9 | 267.0 | Up | 06:48:36 - 07:18:36 | -4191 |
| Anarchist Mountain Observatory | 07:03:35 | -57.1 | Dark | Down | 63.8 | 267.5 | Up | 06:48:35 - 07:18:35 | -4210 |
| Tonasket | 07:03:36 | -57.4 | Dark | Down | 63.8 | 268.1 | Up | 06:48:36 - 07:18:36 | -4244 |
| Victoria | 07:03:51 | -56.1 | Dark | Down | 66.4 | 265.2 | Up | 06:48:51 - 07:18:51 | -4266 |
| Okanogan | 07:03:36 | -57.6 | Dark | Down | 63.9 | 268.7 | Up | 06:48:36 - 07:18:36 | -4282 |
| Brewster | 07:03:37 | -57.8 | Dark | Down | 64.1 | 269.1 | Up | 06:48:37 - 07:18:37 | -4312 |
| Manson/Chelan | 07:03:37 | -57.8 | Dark | Down | 64.3 | 269.2 | Up | 06:48:37 - 07:18:37 | -4336 |
| Wenatchee | 07:03:37 | -58.2 | Dark | Down | 64.4 | 270.1 | Up | 06:48:37 - 07:18:37 | -4389 |
| Ellensburg | 07:03:38 | -58.4 | Dark | Down | 64.6 | 270.8 | Up | 06:48:38 - 07:18:38 | -4436 |
| Yakima | 07:03:38 | -58.8 | Dark | Down | 64.6 | 271.6 | Up | 06:48:38 - 07:18:38 | -4481 |
| Toppenish/White Swan | 07:03:38 | -59.0 | Dark | Down | 64.5 | 272.2 | Up | 06:48:38 - 07:18:38 | -4505 |
| Pasco | 07:03:33 | -59.6 | Dark | Down | 63.6 | 273.3 | Up | 06:48:33 - 07:18:33 | -4516 |
| PNWRO | 07:03:33 | -59.9 | Dark | Down | 63.4 | 273.9 | Up | 06:48:33 - 07:18:33 | -4543 |
| Goldendale | 07:03:40 | -59.3 | Dark | Down | 64.7 | 273.1 | Up | 06:48:40 - 07:18:40 | -4567 |
| The Dalles | 07:03:40 | -59.3 | Dark | Down | 65.0 | 273.3 | Up | 06:48:40 - 07:18:40 | -4592 |
| Maupin | 07:03:43 | -59.7 | Dark | Down | 64.9 | 274.3 | Up | 06:48:43 - 07:18:43 | -4638 |
| Sisters | 07:03:44 | -60.2 | Dark | Down | 65.1 | 275.9 | Up | 06:48:44 - 07:18:44 | -4736 |
| Redmond | 07:03:41 | -60.4 | Dark | Down | 64.9 | 276.2 | Up | 06:48:41 - 07:18:41 | -4739 |
| Bend | 07:03:43 | -60.5 | Dark | Down | 64.9 | 276.5 | Up | 06:48:43 - 07:18:43 | -4763 |
| Oregon Observatory | 07:03:43 | -60.6 | Dark | Down | 65.0 | 276.8 | Up | 06:48:43 - 07:18:43 | -4782 |
| La Pine/Gilchrist | 07:03:44 | -60.7 | Dark | Down | 65.0 | 277.3 | Up | 06:48:44 - 07:18:44 | -4805 |
| North Lake | 07:03:40 | -61.4 | Dark | Down | 64.5 | 278.5 | Up | 06:48:40 - 07:18:40 | -4853 |
| Paisley | 07:03:39 | -61.9 | Dark | Down | 64.2 | 279.7 | Up | 06:48:39 - 07:18:39 | -4913 |
| Chiloquin | 07:03:45 | -61.4 | Dark | Down | 65.1 | 279.5 | Up | 06:48:45 - 07:18:45 | -4928 |
| Klamath Falls | 07:03:44 | -61.7 | Dark | Down | 65.0 | 280.2 | Up | 06:48:44 - 07:18:44 | -4966 |
| Lakeview | 07:03:38 | -62.4 | Dark | Down | 64.0 | 280.8 | Up | 06:48:38 - 07:18:38 | -4969 |
| Dunrhomin | 07:02:35 | -68.6 | Dark | Down | 52.6 | 289.0 | Up | 06:47:35 - 07:17:35 | -5040 |
| Cedarville | 07:03:36 | -63.0 | Dark | Down | 63.7 | 282.2 | Up | 06:48:36 - 07:18:36 | -5042 |
| Fall River/Burney | 07:03:44 | -62.8 | Dark | Down | 64.5 | 282.8 | Up | 06:48:44 - 07:18:44 | -5097 |
| Susanville | 07:03:40 | -63.7 | Dark | Down | 63.8 | 284.3 | Up | 06:48:40 - 07:18:40 | -5166 |
| Greenville | 07:03:41 | -63.7 | Dark | Down | 63.9 | 284.7 | Up | 06:48:41 - 07:18:41 | -5196 |
| Gimple | 07:03:42 | -63.8 | Dark | Down | 63.9 | 284.8 | Up | 06:48:42 - 07:18:42 | -5196 |
| Quincy | 07:03:42 | -63.9 | Dark | Down | 63.9 | 285.1 | Up | 06:48:42 - 07:18:42 | -5219 |
| Portola | 07:03:40 | -64.2 | Dark | Down | 63.5 | 285.5 | Up | 06:48:40 - 07:18:40 | -5232 |
| Reno | 07:03:37 | -64.7 | Dark | Down | 63.0 | 286.1 | Up | 06:48:37 - 07:18:37 | -5260 |
| Carson City | 07:03:38 | -65.0 | Dark | Down | 62.8 | 286.8 | Up | 06:48:38 - 07:18:38 | -5300 |
| Yerington | 07:03:35 | -65.5 | Dark | Down | 62.3 | 287.3 | Up | 06:48:35 - 07:18:35 | -5319 |
| Gardnerville | 07:03:37 | -65.2 | Dark | Down | 62.7 | 287.3 | Up | 06:48:37 - 07:18:37 | -5326 |
| Hawthorne | 07:03:32 | -66.1 | Dark | Down | 61.8 | 288.2 | Up | 06:48:32 - 07:18:32 | -5369 |
| Tonopah | 07:03:25 | -67.1 | Dark | Down | 60.6 | 289.3 | Up | 06:48:25 - 07:18:25 | -5414 |
| Lee Vining | 07:03:35 | -66.3 | Dark | Down | 62.0 | 289.2 | Up | 06:48:35 - 07:18:35 | -5432 |
| Bishop | 07:03:29 | -67.1 | Dark | Down | 61.2 | 290.3 | Up | 06:48:29 - 07:18:29 | -5495 |
| Beatty | 07:03:23 | -68.3 | Dark | Down | 59.9 | 291.2 | Up | 06:48:23 - 07:18:23 | -5538 |
| Indian Springs | 07:03:19 | -69.0 | Dark | Down | 59.0 | 291.8 | Up | 06:48:19 - 07:18:19 | -5567 |
| Henderson | 07:03:16 | -69.8 | Dark | Down | 58.2 | 292.7 | Up | 06:48:16 - 07:18:16 | -5620 |
| Patrick | 07:03:10 | -70.8 | Dark | Down | 57.2 | 293.7 | Up | 06:48:10 - 07:18:10 | -5679 |
| Kingman/Dolan Springs | 07:03:12 | -70.9 | Dark | Down | 57.2 | 294.0 | Up | 06:48:12 - 07:18:12 | -5705 |
| Laughlin/Bullhead City | 07:03:15 | -70.7 | Dark | Down | 57.6 | 294.0 | Up | 06:48:15 - 07:18:15 | -5712 |
| CPSLO | 07:03:43 | -67.3 | Dark | Down | 62.1 | 293.8 | Up | 06:48:43 - 07:18:43 | -5725 |
| Mohave Valley | 07:03:14 | -70.9 | Dark | Down | 57.5 | 294.4 | Up | 06:48:14 - 07:18:14 | -5741 |
| Lake Havasu City | 07:03:12 | -71.4 | Dark | Down | 57.1 | 295.0 | Up | 06:48:12 - 07:18:12 | -5782 |
| Parker | 07:03:13 | -71.7 | Dark | Down | 57.0 | 295.5 | Up | 06:48:13 - 07:18:13 | -5820 |
| George/Scottsdale | 07:03:03 | -73.1 | Dark | Down | 55.0 | 296.1 | Up | 06:48:03 - 07:18:03 | -5842 |
| Wildwood | 07:03:31 | -69.4 | Dark | Down | 60.1 | 295.6 | Up | 06:48:31 - 07:18:31 | -5852 |
| Blythe | 07:03:14 | -71.9 | Dark | Down | 57.0 | 296.2 | Up | 06:48:14 - 07:18:14 | -5879 |
| Idyllwild | 07:03:24 | -70.7 | Dark | Down | 58.6 | 296.1 | Up | 06:48:24 - 07:18:24 | -5882 |
| Calipatria | 07:03:19 | -71.8 | Dark | Down | 57.4 | 296.9 | Up | 06:48:19 - 07:18:19 | -5939 |
| Yuma | 07:03:14 | -72.6 | Dark | Down | 56.6 | 297.5 | Up | 06:48:14 - 07:18:14 | -5979 |
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 181855, (2022/01/25 07:18UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:29 0.8 25.65 142 3Iot Aur 04:56:59.6 +33:09:58 2.7 8.50 134 PPM 047658 05:03:18.5 +41:26:29 6.2 0.73 129 PPM 047575 04:59:42.7 +41:52:23 7.4 0.23 130 PPM 047578 04:59:54.1 +41:30:59 9.4 0.15 130 181855 04:59:33.3 +41:38:55 16.9 130 Positions are for J2000
Event circumstances last updated at 2021/12/05 02:02:43 UT
Marc W. Buie, Southwest Research Institute