Event between 04HL79 and star GA0780:04781787 with event index number of 1031887
Geocentric closest approach at 2021/01/19 11:41:58 UTC
J2000 position of star is 15:23:34.6 -10:29:59
Equinox of date position of star is 15:24:43.4 -10:34:24
Stellar brightness G=15.2,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 143 degrees from the moon.
Moon is 37% illuminated.
TNO apparent brightness V=24.0
[RECON map]
TNO is 41.1 AU from the Sun
and 41.5 AU from the Earth.
The TNO is moving 16.7
km/sec on the sky relative to the star, or,
2.0 arcsec/hr.
The 1-sigma error in the time of the event is 761 seconds.
The 1-sigma cross-track error in the shadow position is
2163 km.
The sky-plane scale is
30068.8 km/arcsec.
The TNO has an absolute magnitude Hv=7.7
Diameter=176.2 km assuming a 5% albedo -- 10.5 sec chord
Diameter=71.9 km assuming a 30% albedo -- 4.3 sec chord
Dynamical classification is SCATEXTD
Star training set for 04HL79, (2021/01/19 11:42UT) Object RA Dec mag sep mel Antares 16:30:42.1 -26:28:37 0.9 22.25 124 27Bet Lib 15:18:08.6 -09:27:34 2.6 1.97 145 31Eps Lib 15:25:20.5 -10:23:48 4.8 0.23 143 PPM 230154 15:24:19.8 -10:33:43 8.5 0.10 143 PPM 230175 15:24:52.4 -10:32:22 9.5 0.05 143 04HL79 15:24:43.4 -10:34:24 15.2 143 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
1.2 sigma about the mid-time.
The median site spacing is 25.8 km
RECON observability=0.3 and success probability=6.6%
| 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 | 11:38:50 | -39.0 | Dark | Down | 12.0 | 123.1 | Really Low | 11:23:50 - 11:53:50 | 3142 |
| Kelowna | 11:38:47 | -39.2 | Dark | Down | 12.1 | 122.9 | Really Low | 11:23:47 - 11:53:47 | 3118 |
| Peachland | 11:38:46 | -39.4 | Dark | Down | 12.0 | 122.7 | Really Low | 11:23:46 - 11:53:46 | 3109 |
| Summerland | 11:38:46 | -39.4 | Dark | Down | 12.1 | 122.7 | Really Low | 11:23:46 - 11:53:46 | 3101 |
| Penticton | 11:38:46 | -39.4 | Dark | Down | 12.2 | 122.8 | Really Low | 11:23:46 - 11:53:46 | 3098 |
| Oliver | 11:38:45 | -39.5 | Dark | Down | 12.4 | 122.7 | Really Low | 11:23:45 - 11:53:45 | 3077 |
| Anarchist Mountain Observatory | 11:38:44 | -39.4 | Dark | Down | 12.6 | 122.9 | Really Low | 11:23:44 - 11:53:44 | 3069 |
| Tonasket | 11:38:43 | -39.5 | Dark | Down | 12.7 | 122.7 | Really Low | 11:23:43 - 11:53:43 | 3050 |
| Okanogan | 11:38:41 | -39.7 | Dark | Down | 12.8 | 122.5 | Really Low | 11:23:41 - 11:53:41 | 3028 |
| Brewster | 11:38:39 | -39.9 | Dark | Down | 12.9 | 122.3 | Really Low | 11:23:39 - 11:53:39 | 3009 |
| Victoria | 11:38:32 | -42.1 | Dark | Down | 10.6 | 119.4 | Really Low | 11:23:32 - 11:53:32 | 3000 |
| Manson/Chelan | 11:38:37 | -40.2 | Dark | Down | 12.8 | 122.0 | Really Low | 11:23:37 - 11:53:37 | 2993 |
| Wenatchee | 11:38:34 | -40.5 | Dark | Down | 12.9 | 121.7 | Really Low | 11:23:34 - 11:53:34 | 2962 |
| Ellensburg | 11:38:32 | -40.7 | Dark | Down | 13.0 | 121.4 | Really Low | 11:23:32 - 11:53:32 | 2934 |
| Yakima | 11:38:31 | -40.8 | Dark | Down | 13.2 | 121.3 | Really Low | 11:23:31 - 11:53:31 | 2907 |
| Pasco | 11:38:33 | -39.9 | Dark | Down | 14.2 | 122.5 | Really Low | 11:23:33 - 11:53:33 | 2900 |
| Toppenish/White Swan | 11:38:30 | -40.8 | Dark | Down | 13.4 | 121.4 | Really Low | 11:23:30 - 11:53:30 | 2895 |
| PNWRO | 11:38:32 | -39.8 | Dark | Down | 14.5 | 122.6 | Really Low | 11:23:32 - 11:53:32 | 2886 |
| Goldendale | 11:38:27 | -41.2 | Dark | Down | 13.4 | 121.0 | Really Low | 11:23:27 - 11:53:27 | 2855 |
| The Dalles | 11:38:25 | -41.5 | Dark | Down | 13.3 | 120.6 | Really Low | 11:23:25 - 11:53:25 | 2837 |
| Maupin | 11:38:24 | -41.5 | Dark | Down | 13.6 | 120.6 | Really Low | 11:23:24 - 11:53:24 | 2810 |
| Redmond | 11:38:20 | -41.8 | Dark | Down | 14.0 | 120.3 | Really Low | 11:23:20 - 11:53:20 | 2749 |
| Sisters | 11:38:18 | -42.1 | Dark | Down | 13.7 | 120.0 | Really Low | 11:23:18 - 11:53:18 | 2747 |
| Bend | 11:38:18 | -42.0 | Dark | Down | 14.0 | 120.2 | Really Low | 11:23:18 - 11:53:18 | 2733 |
| Oregon Observatory | 11:38:17 | -42.1 | Dark | Down | 14.0 | 120.0 | Really Low | 11:23:17 - 11:53:17 | 2720 |
| La Pine/Gilchrist | 11:38:16 | -42.2 | Dark | Down | 14.1 | 119.9 | Really Low | 11:23:16 - 11:53:16 | 2706 |
| North Lake | 11:38:16 | -41.9 | Dark | Down | 14.7 | 120.3 | Really Low | 11:23:16 - 11:53:16 | 2682 |
| Paisley | 11:38:15 | -41.7 | Dark | Down | 15.2 | 120.5 | Really Low | 11:23:15 - 11:53:15 | 2648 |
| Dunrhomin | 11:38:56 | -30.3 | Dark | Down | 26.0 | 132.7 | Low | 11:23:56 - 11:53:56 | 2617 |
| Lakeview | 11:38:12 | -41.7 | Dark | Down | 15.5 | 120.5 | Really Low | 11:23:12 - 11:53:12 | 2614 |
| Klamath Falls | 11:38:09 | -42.7 | Dark | Down | 14.6 | 119.4 | Really Low | 11:23:09 - 11:53:09 | 2601 |
| Cedarville | 11:38:10 | -41.7 | Dark | Down | 16.0 | 120.5 | Really Low | 11:23:10 - 11:53:10 | 2569 |
| Fall River/Burney | 11:38:06 | -42.7 | Dark | Down | 15.4 | 119.4 | Really Low | 11:23:06 - 11:53:06 | 2521 |
| Susanville | 11:38:05 | -42.2 | Dark | Down | 16.2 | 119.8 | Really Low | 11:23:05 - 11:53:05 | 2483 |
| Gimple | 11:38:03 | -42.4 | Dark | Down | 16.2 | 119.6 | Really Low | 11:23:03 - 11:53:03 | 2461 |
| Greenville | 11:38:03 | -42.5 | Dark | Down | 16.1 | 119.5 | Really Low | 11:23:03 - 11:53:03 | 2460 |
| Quincy | 11:38:02 | -42.5 | Dark | Down | 16.2 | 119.4 | Really Low | 11:23:02 - 11:53:02 | 2445 |
| Portola | 11:38:03 | -42.2 | Dark | Down | 16.6 | 119.8 | Really Low | 11:23:03 - 11:53:03 | 2441 |
| Reno | 11:38:04 | -41.7 | Dark | Down | 17.2 | 120.2 | Really Low | 11:23:04 - 11:53:04 | 2429 |
| Carson City | 11:38:03 | -41.8 | Dark | Down | 17.4 | 120.1 | Really Low | 11:23:03 - 11:53:03 | 2402 |
| Yerington | 11:38:03 | -41.3 | Dark | Down | 17.9 | 120.5 | Really Low | 11:23:03 - 11:53:03 | 2395 |
| Gardnerville | 11:38:02 | -41.8 | Dark | Down | 17.5 | 120.1 | Really Low | 11:23:02 - 11:53:02 | 2384 |
| Hawthorne | 11:38:04 | -40.9 | Dark | Down | 18.5 | 120.8 | Really Low | 11:23:04 - 11:53:04 | 2365 |
| Tonopah | 11:38:06 | -39.9 | Dark | Down | 19.7 | 121.8 | Really Low | 11:23:06 - 11:53:06 | 2346 |
| Lee Vining | 11:38:00 | -41.4 | Dark | Down | 18.5 | 120.3 | Really Low | 11:23:00 - 11:53:00 | 2318 |
| Bishop | 11:38:00 | -40.9 | Dark | Down | 19.3 | 120.6 | Really Low | 11:23:00 - 11:53:00 | 2279 |
| Beatty | 11:38:03 | -39.6 | Dark | Down | 20.6 | 121.7 | Low | 11:23:03 - 11:53:03 | 2261 |
| Indian Springs | 11:38:05 | -38.7 | Dark | Down | 21.5 | 122.5 | Low | 11:23:05 - 11:53:05 | 2247 |
| Henderson | 11:38:06 | -38.2 | Dark | Down | 22.3 | 122.8 | Low | 11:23:06 - 11:53:06 | 2213 |
| Patrick | 11:38:08 | -37.3 | Dark | Down | 23.4 | 123.5 | Low | 11:23:08 - 11:53:08 | 2175 |
| Kingman/Dolan Springs | 11:38:07 | -37.5 | Dark | Down | 23.4 | 123.2 | Low | 11:23:07 - 11:53:07 | 2156 |
| Laughlin/Bullhead City | 11:38:05 | -37.9 | Dark | Down | 23.0 | 122.8 | Low | 11:23:05 - 11:53:05 | 2148 |
| Mohave Valley | 11:38:04 | -37.9 | Dark | Down | 23.2 | 122.7 | Low | 11:23:04 - 11:53:04 | 2126 |
| Lake Havasu City | 11:38:03 | -37.7 | Dark | Down | 23.6 | 122.8 | Low | 11:23:03 - 11:53:03 | 2097 |
| CPSLO | 11:37:46 | -42.9 | Dark | Down | 18.6 | 118.3 | Really Low | 11:22:46 - 11:52:46 | 2090 |
| Parker | 11:38:03 | -37.7 | Dark | Down | 23.8 | 122.7 | Low | 11:23:03 - 11:53:03 | 2069 |
| George/Scottsdale | 11:38:10 | -35.6 | Dark | Down | 25.7 | 124.4 | Low | 11:23:10 - 11:53:10 | 2060 |
| Blythe | 11:37:59 | -37.9 | Dark | Down | 23.9 | 122.2 | Low | 11:22:59 - 11:52:59 | 2023 |
| Wildwood | 11:37:48 | -41.3 | Dark | Down | 20.7 | 119.4 | Low | 11:22:48 - 11:52:48 | 2017 |
| Idyllwild | 11:37:53 | -39.7 | Dark | Down | 22.3 | 120.7 | Low | 11:22:53 - 11:52:53 | 2010 |
| Calipatria | 11:37:55 | -38.7 | Dark | Down | 23.4 | 121.3 | Low | 11:22:55 - 11:52:55 | 1972 |
| Yuma | 11:37:57 | -37.9 | Dark | Down | 24.3 | 121.8 | Low | 11:22:57 - 11:52:57 | 1947 |
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 04HL79, (2021/01/19 11:42UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 22.25 124 27Bet Lib 15:17:00.3 -09:22:59 2.6 1.97 145 31Eps Lib 15:24:11.8 -10:19:23 4.8 0.23 143 PPM 230154 15:23:11.0 -10:29:17 8.5 0.10 143 PPM 230175 15:23:43.6 -10:27:57 9.5 0.05 143 04HL79 15:23:34.6 -10:29:59 15.2 143 Positions are for J2000
Event circumstances last updated at 2021/01/18 20:46:34 UT
Marc W. Buie, Southwest Research Institute