Event between (24978) 98HJ151 and star GA0640:11553847 with event index number of 278333
Geocentric closest approach at 2020/07/13 06:55:07 UTC
J2000 position of star is 17:09:31.0 -24:06:47
Equinox of date position of star is 17:10:45.9 -24:08:16
Stellar brightness G=16.1,
use SENSEUP=128
Star is 126 degrees from the moon.
Moon is 47% illuminated.
TNO apparent brightness V=26.4
[RECON map]
TNO is 42.9 AU from the Sun
and 42.1 AU from the Earth.
The TNO is moving 20.1
km/sec on the sky relative to the star, or,
2.4 arcsec/hr.
The 1-sigma error in the time of the event is 1844 seconds.
The 1-sigma cross-track error in the shadow position is
5120 km.
The sky-plane scale is
30514.7 km/arcsec.
The TNO has an absolute magnitude Hv=10.0
Diameter=190.6 km assuming a 5% albedo -- 3.0 sec chord
Diameter=77.8 km assuming a 30% albedo -- 1.2 sec chord
Dynamical classification is CLASSICAL
Star training set for 24978, (2020/07/13 06:55UT) Object RA Dec mag sep mel Antares 16:30:40.2 -26:28:33 0.9 9.36 134 35Eta Oph 17:11:33.4 -15:44:56 2.6 8.39 127 26 Oph 17:01:25.1 -25:01:07 5.8 2.30 128 PPM 266409 17:07:48.9 -23:55:51 8.2 0.71 127 PPM 266495 17:11:18.0 -24:10:28 9.1 0.13 126 24978 17:10:46.1 -24:08:16 16.1 126 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
0.5 sigma about the mid-time.
The median site spacing is 14.7 km
RECON observability=0.6 and success probability=1.2%
| 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 | 06:54:31 | -16.4 | AT | Down | 13.8 | 197.4 | Really Low | 06:39:31 - 07:09:31 | 10658 |
| Kelowna | 06:54:31 | -16.8 | AT | Down | 14.2 | 197.3 | Really Low | 06:39:31 - 07:09:31 | 10647 |
| Peachland | 06:54:31 | -16.8 | AT | Down | 14.4 | 197.0 | Really Low | 06:39:31 - 07:09:31 | 10645 |
| Summerland | 06:54:32 | -17.0 | AT | Down | 14.5 | 197.1 | Really Low | 06:39:32 - 07:09:32 | 10640 |
| Penticton | 06:54:31 | -17.1 | AT | Down | 14.6 | 197.2 | Really Low | 06:39:31 - 07:09:31 | 10638 |
| Oliver | 06:54:31 | -17.4 | AT | Down | 14.9 | 197.3 | Really Low | 06:39:31 - 07:09:31 | 10627 |
| Anarchist Mountain Observatory | 06:54:30 | -17.6 | AT | Down | 15.0 | 197.5 | Really Low | 06:39:30 - 07:09:30 | 10622 |
| Victoria | 06:54:44 | -17.2 | AT | Down | 16.2 | 193.8 | Really Low | 06:39:44 - 07:09:44 | 10613 |
| Tonasket | 06:54:30 | -17.9 | AT | Down | 15.3 | 197.4 | Really Low | 06:39:30 - 07:09:30 | 10611 |
| Okanogan | 06:54:30 | -18.2 | Dark | Down | 15.7 | 197.3 | Really Low | 06:39:30 - 07:09:30 | 10601 |
| Brewster | 06:54:30 | -18.4 | Dark | Down | 16.0 | 197.1 | Really Low | 06:39:30 - 07:09:30 | 10593 |
| Manson/Chelan | 06:54:31 | -18.5 | Dark | Down | 16.3 | 196.8 | Really Low | 06:39:31 - 07:09:31 | 10587 |
| Entiat | 06:54:31 | -18.7 | Dark | Down | 16.5 | 196.8 | Really Low | 06:39:31 - 07:09:31 | 10579 |
| Wenatchee | 06:54:32 | -18.9 | Dark | Down | 16.7 | 196.7 | Really Low | 06:39:32 - 07:09:32 | 10571 |
| Ellensburg | 06:54:31 | -19.3 | Dark | Down | 17.2 | 196.5 | Really Low | 06:39:31 - 07:09:31 | 10557 |
| Yakima | 06:54:31 | -19.7 | Dark | Down | 17.6 | 196.5 | Really Low | 06:39:31 - 07:09:31 | 10543 |
| Toppenish/White Swan | 06:54:30 | -19.9 | Dark | Down | 17.8 | 196.7 | Really Low | 06:39:30 - 07:09:30 | 10535 |
| Pasco | 06:54:26 | -20.3 | Dark | Down | 17.6 | 197.9 | Really Low | 06:39:26 - 07:09:26 | 10526 |
| PNWRO | 06:54:24 | -20.6 | Dark | Down | 17.8 | 198.1 | Really Low | 06:39:24 - 07:09:24 | 10517 |
| Goldendale | 06:54:31 | -20.3 | Dark | Down | 18.4 | 196.4 | Really Low | 06:39:31 - 07:09:31 | 10515 |
| The Dalles | 06:54:32 | -20.5 | Dark | Down | 18.7 | 196.1 | Really Low | 06:39:32 - 07:09:32 | 10507 |
| Maupin | 06:54:32 | -20.9 | Dark | Down | 19.0 | 196.2 | Really Low | 06:39:32 - 07:09:32 | 10492 |
| Sisters | 06:54:32 | -21.6 | Dark | Down | 20.0 | 195.8 | Really Low | 06:39:32 - 07:09:32 | 10459 |
| Redmond | 06:54:30 | -21.7 | Dark | Down | 19.9 | 196.2 | Really Low | 06:39:30 - 07:09:30 | 10457 |
| Bend | 06:54:32 | -21.9 | Dark | Down | 20.2 | 196.1 | Low | 06:39:32 - 07:09:32 | 10449 |
| Oregon Observatory | 06:54:31 | -22.0 | Dark | Down | 20.4 | 196.0 | Low | 06:39:31 - 07:09:31 | 10442 |
| La Pine/Gilchrist | 06:54:32 | -22.2 | Dark | Down | 20.6 | 195.9 | Low | 06:39:32 - 07:09:32 | 10434 |
| North Lake | 06:54:28 | -22.8 | Dark | Down | 20.9 | 196.5 | Low | 06:39:28 - 07:09:28 | 10415 |
| Paisley | 06:54:26 | -23.4 | Dark | Down | 21.3 | 196.9 | Low | 06:39:26 - 07:09:26 | 10391 |
| Klamath Falls | 06:54:30 | -23.5 | Dark | Down | 22.0 | 195.8 | Low | 06:39:30 - 07:09:30 | 10373 |
| Lakeview | 06:54:24 | -23.9 | Dark | Down | 21.8 | 197.2 | Low | 06:39:24 - 07:09:24 | 10368 |
| Cedarville | 06:54:23 | -24.6 | Dark | Down | 22.3 | 197.4 | Low | 06:39:23 - 07:09:23 | 10339 |
| Fall River/Burney | 06:54:27 | -24.7 | Dark | Down | 23.1 | 196.3 | Low | 06:39:27 - 07:09:27 | 10319 |
| Susanville | 06:54:23 | -25.5 | Dark | Down | 23.5 | 197.1 | Low | 06:39:23 - 07:09:23 | 10289 |
| Greenville | 06:54:24 | -25.7 | Dark | Down | 23.8 | 196.9 | Low | 06:39:24 - 07:09:24 | 10276 |
| Gimple | 06:54:24 | -25.7 | Dark | Down | 23.8 | 196.9 | Low | 06:39:24 - 07:09:24 | 10276 |
| Quincy | 06:54:25 | -25.9 | Dark | Down | 24.0 | 196.9 | Low | 06:39:25 - 07:09:25 | 10267 |
| Portola | 06:54:22 | -26.1 | Dark | Down | 24.1 | 197.4 | Low | 06:39:22 - 07:09:22 | 10260 |
| Reno | 06:54:19 | -26.5 | Dark | Down | 24.2 | 198.0 | Low | 06:39:19 - 07:09:19 | 10245 |
| Carson City | 06:54:19 | -26.9 | Dark | Down | 24.5 | 198.1 | Low | 06:39:19 - 07:09:19 | 10227 |
| Yerington | 06:54:15 | -27.2 | Dark | Down | 24.5 | 198.7 | Low | 06:39:15 - 07:09:15 | 10216 |
| Gardnerville | 06:54:17 | -27.1 | Dark | Down | 24.7 | 198.2 | Low | 06:39:17 - 07:09:17 | 10215 |
| Hawthorne | 06:54:13 | -27.8 | Dark | Down | 24.8 | 199.3 | Low | 06:39:13 - 07:09:13 | 10191 |
| Niwot | 06:53:25 | -28.1 | Dark | Down | 19.0 | 211.2 | Really Low | 06:38:25 - 07:08:25 | 10166 |
| Lee Vining | 06:54:14 | -28.2 | Dark | Down | 25.5 | 198.9 | Low | 06:39:14 - 07:09:14 | 10165 |
| Tonopah | 06:54:06 | -28.5 | Dark | Down | 24.9 | 200.7 | Low | 06:39:06 - 07:09:06 | 10162 |
| SwRI | 06:53:24 | -28.2 | Dark | Down | 19.2 | 211.1 | Really Low | 06:38:24 - 07:08:24 | 10161 |
| Bishop | 06:54:11 | -28.9 | Dark | Down | 25.9 | 199.7 | Low | 06:39:11 - 07:09:11 | 10130 |
| Beatty | 06:54:03 | -29.7 | Dark | Down | 25.9 | 201.3 | Low | 06:39:03 - 07:09:03 | 10098 |
| Indian Springs | 06:53:59 | -30.3 | Dark | Down | 25.8 | 202.4 | Low | 06:38:59 - 07:08:59 | 10075 |
| Henderson | 06:53:54 | -30.9 | Dark | Down | 26.1 | 203.1 | Low | 06:38:54 - 07:08:54 | 10042 |
| CPSLO | 06:54:17 | -30.3 | Dark | Down | 28.4 | 197.8 | Low | 06:39:17 - 07:09:17 | 10026 |
| Searchlight/Boulder City | 06:53:54 | -31.5 | Dark | Down | 26.6 | 203.3 | Low | 06:38:54 - 07:08:54 | 10010 |
| Patrick | 06:53:49 | -31.7 | Dark | Down | 26.3 | 204.3 | Low | 06:38:49 - 07:08:49 | 10000 |
| Laughlin/Bullhead City | 06:53:52 | -31.9 | Dark | Down | 26.8 | 203.7 | Low | 06:38:52 - 07:08:52 | 9990 |
| Kingman/Dolan Springs | 06:53:48 | -31.9 | Dark | Down | 26.6 | 204.2 | Low | 06:38:48 - 07:08:48 | 9989 |
| DCO | 06:53:46 | -32.2 | Dark | Down | 26.4 | 205.0 | Low | 06:38:46 - 07:08:46 | 9978 |
| Mohave Valley | 06:53:51 | -32.1 | Dark | Down | 27.0 | 203.7 | Low | 06:38:51 - 07:08:51 | 9975 |
| Wildwood | 06:54:07 | -32.0 | Dark | Down | 29.0 | 200.0 | Low | 06:39:07 - 07:09:07 | 9951 |
| Lake Havasu City | 06:53:49 | -32.6 | Dark | Down | 27.3 | 204.1 | Low | 06:38:49 - 07:08:49 | 9951 |
| Parker | 06:53:49 | -32.9 | Dark | Down | 27.6 | 204.2 | Low | 06:38:49 - 07:08:49 | 9930 |
| Idyllwild | 06:53:59 | -32.8 | Dark | Down | 28.8 | 201.9 | Low | 06:38:59 - 07:08:59 | 9922 |
| Blythe | 06:53:50 | -33.4 | Dark | Down | 28.2 | 204.0 | Low | 06:38:50 - 07:08:50 | 9902 |
| George/Scottsdale | 06:53:39 | -33.7 | Dark | Down | 27.2 | 206.5 | Low | 06:38:39 - 07:08:39 | 9887 |
| Calipatria | 06:53:52 | -33.6 | Dark | Down | 29.0 | 203.2 | Low | 06:38:52 - 07:08:52 | 9878 |
| Yuma | 06:53:48 | -34.2 | Dark | Down | 29.1 | 204.2 | Low | 06:38:48 - 07:08:48 | 9847 |
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 24978, (2020/07/13 06:55UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 9.36 134 35Eta Oph 17:10:22.7 -15:43:29 2.6 8.39 127 26 Oph 17:00:09.6 -24:59:22 5.8 2.30 128 PPM 266409 17:06:33.9 -23:54:17 8.2 0.71 127 PPM 266495 17:10:02.9 -24:09:00 9.1 0.13 126 24978 17:09:31.0 -24:06:47 16.1 126 Positions are for J2000
Event circumstances last updated at 2020/06/21 04:57:20 UT
Marc W. Buie, Southwest Research Institute