Event between 98WW31 and star GA1100:00843332 with event index number of 1028269
Geocentric closest approach at 2020/12/25 01:02:01 UTC
J2000 position of star is 05:01:10.4 +20:24:55
Equinox of date position of star is 05:02:25.1 +20:26:40
Stellar brightness G=16.2,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 39 degrees from the moon.
Moon is 77% illuminated.
TNO apparent brightness V=23.2
[RECON map]
TNO is 47.8 AU from the Sun
and 46.9 AU from the Earth.
The TNO is moving 24.8
km/sec on the sky relative to the star, or,
2.6 arcsec/hr.
The 1-sigma error in the time of the event is 69 seconds.
The 1-sigma cross-track error in the shadow position is
1700 km.
The sky-plane scale is
33995.3 km/arcsec.
The TNO has an absolute magnitude Hv=6.4
Diameter=322.1 km assuming a 5% albedo -- 13.0 sec chord
Diameter=131.5 km assuming a 30% albedo -- 5.3 sec chord
Dynamical classification is CLASSICAL
Star training set for 98WW31, (2020/12/25 01:02UT) Object RA Dec mag sep mel Aldebaran 04:37:07.6 +16:32:59 0.8 7.15 33 Alnath 05:27:37.2 +28:37:23 1.6 9.98 46 102Iot Tau 05:04:21.1 +21:37:05 4.6 1.26 40 PPM 093957 05:01:28.8 +20:57:27 8.4 0.56 39 PPM 093981 05:02:59.0 +20:51:30 8.7 0.43 39 PPM 093968 05:02:03.4 +20:18:19 11.5 0.16 39 98WW31 05:02:25.1 +20:26:40 16.2 40 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 0.0 km
RECON observability=0.0 and success probability=0.0%
| 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 | 01:04:26 | -9.8 | NT | Up | 19.0 | 80.6 | Really Low | 00:58:13 - 01:10:39 | -1503 |
| Victoria | 01:04:33 | -6.7 | NT | Up | 16.1 | 77.2 | Really Low | 00:58:20 - 01:10:46 | -1503 |
| Peachland | 01:04:28 | -9.4 | NT | Up | 18.6 | 80.1 | Really Low | 00:58:15 - 01:10:41 | -1522 |
| Kelowna | 01:04:28 | -9.6 | NT | Up | 18.9 | 80.4 | Really Low | 00:58:15 - 01:10:41 | -1523 |
| Summerland | 01:04:28 | -9.4 | NT | Up | 18.7 | 80.2 | Really Low | 00:58:15 - 01:10:41 | -1533 |
| Penticton | 01:04:29 | -9.4 | NT | Up | 18.7 | 80.2 | Really Low | 00:58:16 - 01:10:42 | -1540 |
| Oliver | 01:04:30 | -9.3 | NT | Up | 18.7 | 80.1 | Really Low | 00:58:17 - 01:10:43 | -1562 |
| Anarchist Mountain Observatory | 01:04:31 | -9.3 | NT | Up | 18.8 | 80.2 | Really Low | 00:58:18 - 01:10:44 | -1577 |
| Tonasket | 01:04:31 | -9.1 | NT | Up | 18.7 | 80.0 | Really Low | 00:58:18 - 01:10:44 | -1595 |
| Okanogan | 01:04:33 | -8.9 | NT | Up | 18.5 | 79.8 | Really Low | 00:58:20 - 01:10:46 | -1613 |
| Brewster | 01:04:34 | -8.7 | NT | Up | 18.4 | 79.6 | Really Low | 00:58:21 - 01:10:47 | -1624 |
| Manson/Chelan | 01:04:35 | -8.4 | NT | Up | 18.1 | 79.3 | Really Low | 00:58:22 - 01:10:48 | -1628 |
| Wenatchee | 01:04:36 | -8.0 | NT | Up | 17.9 | 79.0 | Really Low | 00:58:23 - 01:10:49 | -1654 |
| Ellensburg | 01:04:38 | -7.7 | NT | Up | 17.7 | 78.7 | Really Low | 00:58:25 - 01:10:51 | -1674 |
| Yakima | 01:04:39 | -7.5 | NT | Up | 17.6 | 78.6 | Really Low | 00:58:26 - 01:10:52 | -1700 |
| Toppenish/White Swan | 01:04:40 | -7.6 | NT | Up | 17.6 | 78.7 | Really Low | 00:58:27 - 01:10:53 | -1719 |
| Goldendale | 01:04:42 | -7.1 | NT | Up | 17.3 | 78.2 | Really Low | 00:58:29 - 01:10:55 | -1744 |
| The Dalles | 01:04:43 | -6.7 | NT | Up | 17.0 | 77.9 | Really Low | 00:58:30 - 01:10:56 | -1749 |
| Pasco | 01:04:40 | -8.3 | NT | Up | 18.5 | 79.5 | Really Low | 00:58:27 - 01:10:53 | -1762 |
| Maupin | 01:04:44 | -6.6 | NT | Up | 16.9 | 77.8 | Really Low | 00:58:31 - 01:10:57 | -1780 |
| PNWRO | 01:04:41 | -8.3 | NT | Up | 18.6 | 79.6 | Really Low | 00:58:28 - 01:10:54 | -1785 |
| Sisters | 01:04:47 | -5.9 | CT | Up | 16.4 | 77.3 | Really Low | 00:58:34 - 01:11:00 | -1825 |
| Redmond | 01:04:47 | -6.1 | NT | Up | 16.7 | 77.5 | Really Low | 00:58:34 - 01:11:00 | -1838 |
| Bend | 01:04:48 | -6.0 | CT | Up | 16.6 | 77.4 | Really Low | 00:58:35 - 01:11:01 | -1848 |
| Oregon Observatory | 01:04:49 | -5.8 | CT | Up | 16.4 | 77.2 | Really Low | 00:58:36 - 01:11:02 | -1856 |
| La Pine/Gilchrist | 01:04:49 | -5.7 | CT | Up | 16.3 | 77.1 | Really Low | 00:58:36 - 01:11:02 | -1869 |
| North Lake | 01:04:51 | -5.9 | CT | Up | 16.7 | 77.4 | Really Low | 00:58:38 - 01:11:04 | -1916 |
| Klamath Falls | 01:04:54 | -4.8 | CT | Up | 15.8 | 76.6 | Really Low | 00:58:41 - 01:11:07 | -1963 |
| Paisley | 01:04:53 | -5.9 | CT | Up | 16.8 | 77.5 | Really Low | 00:58:40 - 01:11:06 | -1965 |
| Lakeview | 01:04:54 | -5.8 | CT | Up | 16.9 | 77.4 | Really Low | 00:58:41 - 01:11:07 | -2007 |
| Fall River/Burney | 01:04:58 | -4.6 | CT | Up | 15.8 | 76.5 | Really Low | 00:58:45 - 01:11:11 | -2058 |
| Cedarville | 01:04:57 | -5.6 | CT | Up | 16.8 | 77.4 | Really Low | 00:58:44 - 01:11:10 | -2059 |
| Susanville | 01:05:00 | -4.8 | CT | Up | 16.2 | 76.8 | Really Low | 00:58:47 - 01:11:13 | -2126 |
| Greenville | 01:05:01 | -4.5 | CT | Up | 16.0 | 76.5 | Really Low | 00:58:48 - 01:11:14 | -2138 |
| Gimple | 01:05:01 | -4.5 | CT | Up | 16.0 | 76.6 | Really Low | 00:58:48 - 01:11:14 | -2141 |
| Quincy | 01:05:02 | -4.4 | CT | Up | 15.9 | 76.5 | Really Low | 00:58:49 - 01:11:15 | -2153 |
| Portola | 01:05:02 | -4.6 | CT | Up | 16.3 | 76.7 | Really Low | 00:58:49 - 01:11:15 | -2177 |
| Reno | 01:05:03 | -5.0 | CT | Up | 16.7 | 77.0 | Really Low | 00:58:50 - 01:11:16 | -2216 |
| Carson City | 01:05:04 | -4.8 | CT | Up | 16.6 | 76.9 | Really Low | 00:58:51 - 01:11:17 | -2244 |
| Gardnerville | 01:05:04 | -4.8 | CT | Up | 16.6 | 76.9 | Really Low | 00:58:51 - 01:11:17 | -2264 |
| Yerington | 01:05:04 | -5.2 | CT | Up | 17.1 | 77.2 | Really Low | 00:58:51 - 01:11:17 | -2278 |
| Hawthorne | 01:05:06 | -5.4 | CT | Up | 17.4 | 77.4 | Really Low | 00:58:53 - 01:11:19 | -2330 |
| Lee Vining | 01:05:07 | -4.8 | CT | Up | 16.9 | 77.0 | Really Low | 00:58:54 - 01:11:20 | -2358 |
| Tonopah | 01:05:07 | -6.2 | NT | Up | 18.4 | 78.1 | Really Low | 00:58:54 - 01:11:20 | -2410 |
| Bishop | 01:05:09 | -5.0 | CT | Up | 17.3 | 77.2 | Really Low | 00:58:56 - 01:11:22 | -2428 |
| Beatty | 01:05:10 | -6.0 | NT | Up | 18.5 | 77.9 | Really Low | 00:58:57 - 01:11:23 | -2516 |
| CPSLO | 01:05:15 | -2.5 | CT | Up | 15.1 | 75.4 | Really Low | 00:59:02 - 01:11:28 | -2519 |
| Indian Springs | 01:05:11 | -6.7 | NT | Up | 19.3 | 78.4 | Really Low | 00:58:58 - 01:11:24 | -2577 |
| Dunrhomin | 01:04:52 | -15.6 | AT | Up | 27.9 | 86.0 | Low | 00:58:39 - 01:11:05 | -2612 |
| Henderson | 01:05:12 | -7.0 | NT | Up | 19.7 | 78.6 | Really Low | 00:58:59 - 01:11:25 | -2643 |
| Wildwood | 01:05:19 | -3.5 | CT | Up | 16.4 | 76.1 | Really Low | 00:59:06 - 01:11:32 | -2684 |
| Laughlin/Bullhead City | 01:05:14 | -6.9 | NT | Up | 19.9 | 78.5 | Really Low | 00:59:01 - 01:11:27 | -2728 |
| Patrick | 01:05:13 | -7.6 | NT | Up | 20.5 | 79.0 | Low | 00:59:00 - 01:11:26 | -2731 |
| Kingman/Dolan Springs | 01:05:14 | -7.3 | NT | Up | 20.3 | 78.8 | Low | 00:59:01 - 01:11:27 | -2743 |
| Mohave Valley | 01:05:15 | -6.8 | NT | Up | 19.8 | 78.4 | Really Low | 00:59:02 - 01:11:28 | -2751 |
| Idyllwild | 01:05:19 | -4.7 | CT | Up | 17.9 | 77.0 | Really Low | 00:59:06 - 01:11:32 | -2775 |
| Lake Havasu City | 01:05:16 | -6.9 | NT | Up | 20.0 | 78.4 | Really Low | 00:59:03 - 01:11:29 | -2792 |
| Parker | 01:05:17 | -6.7 | NT | Up | 19.9 | 78.3 | Really Low | 00:59:04 - 01:11:30 | -2822 |
| Blythe | 01:05:18 | -6.3 | NT | Up | 19.6 | 78.0 | Really Low | 00:59:05 - 01:11:31 | -2856 |
| Calipatria | 01:05:20 | -5.4 | CT | Up | 18.7 | 77.4 | Really Low | 00:59:07 - 01:11:33 | -2867 |
| Yuma | 01:05:21 | -5.9 | CT | Up | 19.3 | 77.6 | Really Low | 00:59:08 - 01:11:34 | -2933 |
| George/Scottsdale | 01:05:16 | -8.4 | NT | Up | 21.8 | 79.4 | Low | 00:59:03 - 01:11:29 | -2939 |
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 98WW31, (2020/12/25 01:02UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:29 0.8 7.15 33 Alnath 05:26:17.5 +28:36:23 1.6 9.98 46 102Iot Tau 05:03:05.8 +21:35:23 4.6 1.26 40 PPM 093957 05:00:13.9 +20:55:40 8.4 0.56 39 PPM 093981 05:01:44.1 +20:49:45 8.7 0.43 39 PPM 093968 05:00:48.9 +20:16:33 11.5 0.16 39 98WW31 05:01:10.4 +20:24:55 16.2 39 Positions are for J2000
Event circumstances last updated at 2020/12/24 00:07:37 UT
Marc W. Buie, Southwest Research Institute