Event between 99RK257 and star GA0940:00025885 with event index number of 1027407
Geocentric closest approach at 2020/12/11 04:47:59 UTC
J2000 position of star is 00:16:06.1 +05:35:33
Equinox of date position of star is 00:17:04.7 +05:41:53
Stellar brightness G=15.4,
use SENSEUP=128
Star is 153 degrees from the moon.
Moon is 17% illuminated.
TNO apparent brightness V=24.7
[RECON map]
TNO is 40.9 AU from the Sun
and 40.6 AU from the Earth.
The TNO is moving 4.8
km/sec on the sky relative to the star, or,
0.6 arcsec/hr.
The 1-sigma error in the time of the event is 308 seconds.
The 1-sigma cross-track error in the shadow position is
1474 km.
The sky-plane scale is
29466.1 km/arcsec.
The TNO has an absolute magnitude Hv=8.4
Diameter=128.2 km assuming a 5% albedo -- 26.8 sec chord
Diameter=52.4 km assuming a 30% albedo -- 11.0 sec chord
Dynamical classification is SCATEXTD
Star training set for 99RK257, (2020/12/11 04:48UT) Object RA Dec mag sep mel Algenib 00:14:19.0 +15:18:00 2.8 9.62 152 41 Psc 00:21:40.6 +08:18:23 5.4 2.83 154 PPM 143305 00:16:43.3 +05:57:37 8.1 0.28 153 PPM 143295 00:16:04.5 +05:42:16 8.8 0.27 153 99RK257 00:17:10.7 +05:42:32 15.4 153 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
2.9 sigma about the mid-time.
The median site spacing is 16.7 km
RECON observability=1.0 and success probability=0.1%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Summerland | 04:32:52 | -43.0 | Dark | Down | 41.1 | 213.6 | Up | 04:17:52 - 04:47:52 | 8047 |
| Kelowna | 04:32:48 | -43.2 | Dark | Down | 40.9 | 214.0 | Up | 04:17:48 - 04:47:48 | 8030 |
| Penticton | 04:32:53 | -43.2 | Dark | Down | 41.3 | 214.0 | Up | 04:17:53 - 04:47:53 | 8014 |
| Okanagan Falls | 04:32:55 | -43.2 | Dark | Down | 41.4 | 214.1 | Up | 04:17:55 - 04:47:55 | 8001 |
| Oliver | 04:32:58 | -43.3 | Dark | Down | 41.6 | 214.2 | Up | 04:17:58 - 04:47:58 | 7989 |
| Anarchist Mountain Observatory | 04:32:58 | -43.5 | Dark | Down | 41.6 | 214.5 | Up | 04:17:58 - 04:47:58 | 7965 |
| Oroville | 04:32:59 | -43.4 | Dark | Down | 41.7 | 214.5 | Up | 04:17:59 - 04:47:59 | 7964 |
| Tonasket | 04:33:02 | -43.5 | Dark | Down | 41.9 | 214.6 | Up | 04:18:02 - 04:48:02 | 7947 |
| Okanogan | 04:33:07 | -43.5 | Dark | Down | 42.2 | 214.6 | Up | 04:18:07 - 04:48:07 | 7932 |
| Manson/Chelan | 04:33:18 | -43.3 | Dark | Down | 42.8 | 214.2 | Up | 04:18:18 - 04:48:18 | 7930 |
| Brewster | 04:33:11 | -43.5 | Dark | Down | 42.5 | 214.6 | Up | 04:18:11 - 04:48:11 | 7924 |
| Entiat | 04:33:21 | -43.3 | Dark | Down | 43.0 | 214.3 | Up | 04:18:21 - 04:48:21 | 7918 |
| Wenatchee | 04:33:25 | -43.3 | Dark | Down | 43.3 | 214.3 | Up | 04:18:25 - 04:48:25 | 7905 |
| Ellensburg | 04:33:31 | -43.3 | Dark | Down | 43.7 | 214.3 | Up | 04:18:31 - 04:48:31 | 7889 |
| Yakima | 04:33:37 | -43.4 | Dark | Down | 44.0 | 214.5 | Up | 04:18:37 - 04:48:37 | 7861 |
| Toppenish/White Swan | 04:33:38 | -43.5 | Dark | Down | 44.1 | 214.9 | Up | 04:18:38 - 04:48:38 | 7835 |
| The Dalles | 04:33:55 | -43.2 | Dark | Down | 45.0 | 214.4 | Up | 04:18:55 - 04:48:55 | 7827 |
| Goldendale | 04:33:49 | -43.4 | Dark | Down | 44.7 | 214.7 | Up | 04:18:49 - 04:48:49 | 7821 |
| Maupin | 04:33:59 | -43.4 | Dark | Down | 45.3 | 214.8 | Up | 04:18:59 - 04:48:59 | 7791 |
| Sisters | 04:34:15 | -43.2 | Dark | Down | 46.2 | 214.7 | Up | 04:19:15 - 04:49:15 | 7758 |
| Madras/Culver | 04:34:06 | -43.5 | Dark | Down | 45.8 | 215.1 | Up | 04:19:06 - 04:49:06 | 7754 |
| Pasco | 04:33:29 | -44.4 | Dark | Down | 43.7 | 216.5 | Up | 04:18:29 - 04:48:29 | 7753 |
| George/Umatilla | 04:33:34 | -44.3 | Dark | Down | 44.1 | 216.4 | Up | 04:18:34 - 04:48:34 | 7741 |
| Redmond | 04:34:12 | -43.5 | Dark | Down | 46.1 | 215.2 | Up | 04:19:12 - 04:49:12 | 7732 |
| Bend | 04:34:16 | -43.4 | Dark | Down | 46.3 | 215.2 | Up | 04:19:16 - 04:49:16 | 7725 |
| PNWRO | 04:33:30 | -44.6 | Dark | Down | 43.8 | 216.9 | Up | 04:18:30 - 04:48:30 | 7721 |
| Oregon Observatory | 04:34:19 | -43.4 | Dark | Down | 46.5 | 215.2 | Up | 04:19:19 - 04:49:19 | 7721 |
| La Pine/Gilchrist | 04:34:22 | -43.4 | Dark | Down | 46.7 | 215.2 | Up | 04:19:22 - 04:49:22 | 7710 |
| Chiloquin | 04:34:41 | -43.4 | Dark | Down | 47.7 | 215.5 | Up | 04:19:41 - 04:49:41 | 7653 |
| North Lake | 04:34:22 | -43.9 | Dark | Down | 46.8 | 216.3 | Up | 04:19:22 - 04:49:22 | 7642 |
| Klamath Falls | 04:34:44 | -43.5 | Dark | Down | 48.0 | 215.9 | Up | 04:19:44 - 04:49:44 | 7624 |
| Tulelake | 04:34:45 | -43.7 | Dark | Down | 48.0 | 216.5 | Up | 04:19:45 - 04:49:45 | 7585 |
| Paisley | 04:34:27 | -44.3 | Dark | Down | 47.1 | 217.1 | Up | 04:19:27 - 04:49:27 | 7580 |
| Lakeview | 04:34:32 | -44.5 | Dark | Down | 47.4 | 217.7 | Up | 04:19:32 - 04:49:32 | 7531 |
| Fall River/Burney | 04:34:56 | -43.9 | Dark | Down | 48.7 | 217.3 | Up | 04:19:56 - 04:49:56 | 7515 |
| Cedarville | 04:34:38 | -44.7 | Dark | Down | 47.8 | 218.5 | Up | 04:19:38 - 04:49:38 | 7472 |
| Susanville | 04:34:58 | -44.6 | Dark | Down | 48.9 | 218.7 | Up | 04:19:58 - 04:49:58 | 7422 |
| Greenville | 04:35:05 | -44.4 | Dark | Down | 49.2 | 218.6 | Up | 04:20:05 - 04:50:05 | 7421 |
| Gimple | 04:35:04 | -44.5 | Dark | Down | 49.2 | 218.7 | Up | 04:20:04 - 04:50:04 | 7415 |
| Quincy | 04:35:08 | -44.4 | Dark | Down | 49.4 | 218.7 | Up | 04:20:08 - 04:50:08 | 7406 |
| Portola | 04:35:05 | -44.8 | Dark | Down | 49.2 | 219.4 | Up | 04:20:05 - 04:50:05 | 7366 |
| Reno | 04:35:02 | -45.3 | Dark | Down | 49.1 | 220.5 | Up | 04:20:02 - 04:50:02 | 7304 |
| Carson City | 04:35:06 | -45.4 | Dark | Down | 49.4 | 220.8 | Up | 04:20:06 - 04:50:06 | 7277 |
| Gardnerville | 04:35:09 | -45.5 | Dark | Down | 49.5 | 221.1 | Up | 04:20:09 - 04:50:09 | 7256 |
| Yerington | 04:35:03 | -45.9 | Dark | Down | 49.2 | 221.8 | Up | 04:20:03 - 04:50:03 | 7221 |
| Hawthorne | 04:35:04 | -46.4 | Dark | Down | 49.3 | 222.8 | Up | 04:20:04 - 04:50:04 | 7152 |
| Lee Vining | 04:35:16 | -46.1 | Dark | Down | 49.9 | 222.7 | Up | 04:20:16 - 04:50:16 | 7142 |
| Bishop | 04:35:18 | -46.7 | Dark | Down | 49.9 | 224.1 | Up | 04:20:18 - 04:50:18 | 7050 |
| CPSLO | 04:36:10 | -45.2 | Dark | Down | 52.6 | 223.2 | Up | 04:21:10 - 04:51:10 | 7050 |
| Tonopah | 04:34:57 | -47.5 | Dark | Down | 48.8 | 225.0 | Up | 04:19:57 - 04:49:57 | 7026 |
| Lone Pine | 04:35:25 | -47.1 | Dark | Down | 50.3 | 225.2 | Up | 04:20:25 - 04:50:25 | 6971 |
| Beatty | 04:35:08 | -48.0 | Dark | Down | 49.4 | 226.5 | Up | 04:20:08 - 04:50:08 | 6909 |
| Wildwood | 04:36:06 | -46.9 | Dark | Down | 52.2 | 227.0 | Up | 04:21:06 - 04:51:06 | 6820 |
| Indian Springs | 04:35:03 | -48.9 | Dark | Down | 49.0 | 228.1 | Up | 04:20:03 - 04:50:03 | 6814 |
| Henderson | 04:35:03 | -49.5 | Dark | Down | 48.9 | 229.4 | Up | 04:20:03 - 04:50:03 | 6728 |
| Searchlight/Boulder City | 04:35:10 | -49.6 | Dark | Down | 49.2 | 230.0 | Up | 04:20:10 - 04:50:10 | 6680 |
| Idyllwild | 04:35:53 | -48.4 | Dark | Down | 51.3 | 229.7 | Up | 04:20:53 - 04:50:53 | 6665 |
| Laughlin/Bullhead City | 04:35:11 | -50.0 | Dark | Down | 49.2 | 230.7 | Up | 04:20:11 - 04:50:11 | 6634 |
| Mohave Valley | 04:35:15 | -50.0 | Dark | Down | 49.3 | 231.0 | Up | 04:20:15 - 04:50:15 | 6613 |
| Patrick | 04:35:00 | -50.5 | Dark | Down | 48.6 | 231.3 | Up | 04:20:00 - 04:50:00 | 6608 |
| Kingman/Dolan Springs | 04:35:06 | -50.4 | Dark | Down | 48.8 | 231.3 | Up | 04:20:06 - 04:50:06 | 6602 |
| Lake Havasu City | 04:35:17 | -50.3 | Dark | Down | 49.4 | 231.7 | Up | 04:20:17 - 04:50:17 | 6565 |
| Calipatria | 04:35:49 | -49.5 | Dark | Down | 51.0 | 231.7 | Up | 04:20:49 - 04:50:49 | 6539 |
| DCO | 04:34:57 | -51.1 | Dark | Down | 48.3 | 232.3 | Up | 04:19:57 - 04:49:57 | 6538 |
| Parker | 04:35:23 | -50.3 | Dark | Down | 49.6 | 232.0 | Up | 04:20:23 - 04:50:23 | 6536 |
| Blythe | 04:35:32 | -50.1 | Dark | Down | 50.1 | 232.2 | Up | 04:20:32 - 04:50:32 | 6515 |
| Niwot | 04:32:40 | -55.7 | Dark | Down | 40.7 | 236.3 | Up | 04:17:40 - 04:47:40 | 6477 |
| Yuma | 04:35:46 | -50.2 | Dark | Down | 50.6 | 233.1 | Up | 04:20:46 - 04:50:46 | 6446 |
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 99RK257, (2020/12/11 04:48UT) Object RA Dec mag sep mel Algenib 00:13:14.2 +15:11:01 2.8 9.62 152 41 Psc 00:20:35.9 +08:11:25 5.4 2.83 154 PPM 143305 00:15:38.7 +05:50:38 8.1 0.28 153 PPM 143295 00:14:59.9 +05:35:18 8.8 0.27 153 99RK257 00:16:06.1 +05:35:33 15.4 153 Positions are for J2000
Event circumstances last updated at 2019/01/01 21:44:01 UT
Marc W. Buie, Southwest Research Institute