Event between 04HY78 and star GA0620:07440333 with event index number of 253833
Geocentric closest approach at 2020/04/14 07:39:37 UTC
J2000 position of star is 15:42:03.3 -27:00:33
Equinox of date position of star is 15:43:14.0 -27:04:12
Stellar brightness G=16.6,
use SENSEUP=128
Star is 48 degrees from the moon.
Moon is 57% illuminated.
TNO apparent brightness V=23.6
[RECON map]
TNO is 31.9 AU from the Sun
and 31.1 AU from the Earth.
The TNO is moving 18.7
km/sec on the sky relative to the star, or,
3.0 arcsec/hr.
The 1-sigma error in the time of the event is 587 seconds.
The 1-sigma cross-track error in the shadow position is
5005 km.
The sky-plane scale is
22561.1 km/arcsec.
The TNO has an absolute magnitude Hv=8.5
Diameter=121.9 km assuming a 5% albedo -- 6.5 sec chord
Diameter=49.8 km assuming a 30% albedo -- 2.7 sec chord
Dynamical classification is 3:2E
Star training set for 04HY78, (2020/04/14 07:40UT) Object RA Dec mag sep mel Antares 16:30:39.3 -26:28:31 0.9 10.59 38 7Del Sco 16:01:32.2 -22:40:40 2.3 6.04 45 PPM 264463 15:38:41.8 -26:20:44 6.4 1.26 49 PPM 264516 15:40:50.4 -27:42:29 8.2 0.84 48 PPM 264583 15:43:19.3 -26:53:57 9.9 0.17 48 04HY78 15:43:17.1 -27:04:22 16.6 48 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
1.5 sigma about the mid-time.
The median site spacing is 15.6 km
RECON observability=0.2 and success probability=0.5%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Kelowna | 07:42:03 | -30.4 | Dark | Down | 6.6 | 147.8 | Really Low | 07:27:03 - 07:57:03 | 9507 |
| Penticton | 07:42:04 | -30.7 | Dark | Down | 6.8 | 147.6 | Really Low | 07:27:04 - 07:57:04 | 9490 |
| Summerland | 07:42:04 | -30.7 | Dark | Down | 6.7 | 147.6 | Really Low | 07:27:04 - 07:57:04 | 9490 |
| Okanagan Falls | 07:42:05 | -30.9 | Dark | Down | 7.0 | 147.6 | Really Low | 07:27:05 - 07:57:05 | 9483 |
| Oliver | 07:42:05 | -31.1 | Dark | Down | 7.1 | 147.6 | Really Low | 07:27:05 - 07:57:05 | 9478 |
| Anarchist Mountain Observatory | 07:42:05 | -31.3 | Dark | Down | 7.3 | 147.8 | Really Low | 07:27:05 - 07:57:05 | 9476 |
| Oroville | 07:42:06 | -31.4 | Dark | Down | 7.4 | 147.7 | Really Low | 07:27:06 - 07:57:06 | 9471 |
| Tonasket | 07:42:06 | -31.6 | Dark | Down | 7.6 | 147.7 | Really Low | 07:27:06 - 07:57:06 | 9463 |
| Okanogan | 07:42:07 | -31.9 | Dark | Down | 7.8 | 147.6 | Really Low | 07:27:07 - 07:57:07 | 9447 |
| Brewster | 07:42:09 | -32.2 | Dark | Down | 8.0 | 147.4 | Really Low | 07:27:09 - 07:57:09 | 9431 |
| Manson/Chelan | 07:42:10 | -32.4 | Dark | Down | 8.0 | 147.1 | Really Low | 07:27:10 - 07:57:10 | 9415 |
| Niwot | 07:41:32 | -39.4 | Dark | Down | 19.7 | 158.9 | Really Low | 07:26:32 - 07:56:32 | 9406 |
| Entiat | 07:42:11 | -32.6 | Dark | Down | 8.2 | 147.0 | Really Low | 07:27:11 - 07:57:11 | 9404 |
| SwRI | 07:41:33 | -39.5 | Dark | Down | 19.8 | 158.8 | Really Low | 07:26:33 - 07:56:33 | 9399 |
| Wenatchee | 07:42:12 | -32.8 | Dark | Down | 8.3 | 146.9 | Really Low | 07:27:12 - 07:57:12 | 9392 |
| Pasco | 07:42:11 | -34.0 | Dark | Down | 9.8 | 147.8 | Really Low | 07:27:11 - 07:57:11 | 9374 |
| Ellensburg | 07:42:14 | -33.2 | Dark | Down | 8.6 | 146.7 | Really Low | 07:27:14 - 07:57:14 | 9370 |
| PNWRO | 07:42:11 | -34.3 | Dark | Down | 10.0 | 147.9 | Really Low | 07:27:11 - 07:57:11 | 9369 |
| George/Umatilla | 07:42:13 | -34.4 | Dark | Down | 10.0 | 147.6 | Really Low | 07:27:13 - 07:57:13 | 9354 |
| Yakima | 07:42:14 | -33.6 | Dark | Down | 8.9 | 146.6 | Really Low | 07:27:14 - 07:57:14 | 9353 |
| Toppenish/White Swan | 07:42:15 | -33.8 | Dark | Down | 9.2 | 146.8 | Really Low | 07:27:15 - 07:57:15 | 9348 |
| Goldendale | 07:42:18 | -34.4 | Dark | Down | 9.5 | 146.4 | Really Low | 07:27:18 - 07:57:18 | 9314 |
| The Dalles | 07:42:19 | -34.6 | Dark | Down | 9.5 | 146.1 | Really Low | 07:27:19 - 07:57:19 | 9295 |
| Maupin | 07:42:21 | -35.0 | Dark | Down | 9.9 | 146.1 | Really Low | 07:27:21 - 07:57:21 | 9280 |
| Madras/Culver | 07:42:21 | -35.5 | Dark | Down | 10.4 | 146.0 | Really Low | 07:27:21 - 07:57:21 | 9254 |
| Redmond | 07:42:22 | -35.9 | Dark | Down | 10.6 | 145.9 | Really Low | 07:27:22 - 07:57:22 | 9237 |
| Sisters | 07:42:23 | -35.8 | Dark | Down | 10.5 | 145.6 | Really Low | 07:27:23 - 07:57:23 | 9228 |
| Bend | 07:42:24 | -36.1 | Dark | Down | 10.8 | 145.8 | Really Low | 07:27:24 - 07:57:24 | 9223 |
| Oregon Observatory | 07:42:24 | -36.2 | Dark | Down | 10.9 | 145.7 | Really Low | 07:27:24 - 07:57:24 | 9212 |
| La Pine/Gilchrist | 07:42:25 | -36.4 | Dark | Down | 11.0 | 145.6 | Really Low | 07:27:25 - 07:57:25 | 9201 |
| North Lake | 07:42:24 | -36.9 | Dark | Down | 11.6 | 146.1 | Really Low | 07:27:24 - 07:57:24 | 9196 |
| Paisley | 07:42:24 | -37.5 | Dark | Down | 12.2 | 146.3 | Really Low | 07:27:24 - 07:57:24 | 9179 |
| Lakeview | 07:42:24 | -38.0 | Dark | Down | 12.7 | 146.4 | Really Low | 07:27:24 - 07:57:24 | 9160 |
| Chiloquin | 07:42:29 | -37.5 | Dark | Down | 11.8 | 145.2 | Really Low | 07:27:29 - 07:57:29 | 9139 |
| Cedarville | 07:42:25 | -38.7 | Dark | Down | 13.3 | 146.4 | Really Low | 07:27:25 - 07:57:25 | 9132 |
| Klamath Falls | 07:42:29 | -37.9 | Dark | Down | 12.1 | 145.2 | Really Low | 07:27:29 - 07:57:29 | 9124 |
| Tulelake | 07:42:29 | -38.1 | Dark | Down | 12.4 | 145.5 | Really Low | 07:27:29 - 07:57:29 | 9119 |
| Fall River/Burney | 07:42:31 | -39.1 | Dark | Down | 13.2 | 145.4 | Really Low | 07:27:31 - 07:57:31 | 9075 |
| Susanville | 07:42:29 | -39.8 | Dark | Down | 14.1 | 145.9 | Really Low | 07:27:29 - 07:57:29 | 9063 |
| Gimple | 07:42:30 | -40.0 | Dark | Down | 14.2 | 145.7 | Really Low | 07:27:30 - 07:57:30 | 9043 |
| Greenville | 07:42:31 | -40.0 | Dark | Down | 14.2 | 145.6 | Really Low | 07:27:31 - 07:57:31 | 9041 |
| Reno | 07:42:28 | -40.7 | Dark | Down | 15.1 | 146.5 | Really Low | 07:27:28 - 07:57:28 | 9040 |
| Portola | 07:42:30 | -40.4 | Dark | Down | 14.6 | 146.0 | Really Low | 07:27:30 - 07:57:30 | 9037 |
| Quincy | 07:42:32 | -40.2 | Dark | Down | 14.3 | 145.6 | Really Low | 07:27:32 - 07:57:32 | 9030 |
| Tonopah | 07:42:23 | -42.3 | Dark | Down | 17.5 | 148.3 | Really Low | 07:27:23 - 07:57:23 | 9030 |
| Yerington | 07:42:27 | -41.3 | Dark | Down | 15.9 | 146.9 | Really Low | 07:27:27 - 07:57:27 | 9029 |
| Carson City | 07:42:29 | -41.0 | Dark | Down | 15.5 | 146.4 | Really Low | 07:27:29 - 07:57:29 | 9022 |
| Hawthorne | 07:42:26 | -41.8 | Dark | Down | 16.5 | 147.3 | Really Low | 07:27:26 - 07:57:26 | 9018 |
| Gardnerville | 07:42:29 | -41.3 | Dark | Down | 15.7 | 146.4 | Really Low | 07:27:29 - 07:57:29 | 9010 |
| Indian Springs | 07:42:19 | -43.8 | Dark | Down | 19.4 | 149.4 | Really Low | 07:27:19 - 07:57:19 | 8989 |
| Beatty | 07:42:22 | -43.5 | Dark | Down | 18.7 | 148.5 | Really Low | 07:27:22 - 07:57:22 | 8979 |
| Henderson | 07:42:17 | -44.3 | Dark | Down | 20.1 | 149.8 | Low | 07:27:17 - 07:57:17 | 8977 |
| Lee Vining | 07:42:29 | -42.3 | Dark | Down | 16.8 | 146.8 | Really Low | 07:27:29 - 07:57:29 | 8974 |
| DCO | 07:42:11 | -45.2 | Dark | Down | 21.6 | 151.2 | Low | 07:27:11 - 07:57:11 | 8970 |
| Patrick | 07:42:13 | -45.0 | Dark | Down | 21.1 | 150.7 | Low | 07:27:13 - 07:57:13 | 8970 |
| Bishop | 07:42:27 | -43.0 | Dark | Down | 17.6 | 147.3 | Really Low | 07:27:27 - 07:57:27 | 8961 |
| Kingman/Dolan Springs | 07:42:15 | -45.2 | Dark | Down | 21.2 | 150.5 | Low | 07:27:15 - 07:57:15 | 8952 |
| Searchlight/Boulder City | 07:42:17 | -44.9 | Dark | Down | 20.6 | 149.8 | Low | 07:27:17 - 07:57:17 | 8946 |
| Laughlin/Bullhead City | 07:42:17 | -45.2 | Dark | Down | 21.0 | 150.0 | Low | 07:27:17 - 07:57:17 | 8937 |
| Lone Pine | 07:42:28 | -43.7 | Dark | Down | 18.4 | 147.4 | Really Low | 07:27:28 - 07:57:28 | 8927 |
| Mohave Valley | 07:42:17 | -45.5 | Dark | Down | 21.3 | 150.0 | Low | 07:27:17 - 07:57:17 | 8922 |
| Lake Havasu City | 07:42:16 | -45.9 | Dark | Down | 21.7 | 150.1 | Low | 07:27:16 - 07:57:16 | 8905 |
| Parker | 07:42:17 | -46.2 | Dark | Down | 22.0 | 150.1 | Low | 07:27:17 - 07:57:17 | 8885 |
| Blythe | 07:42:19 | -46.8 | Dark | Down | 22.4 | 149.7 | Low | 07:27:19 - 07:57:19 | 8846 |
| Idyllwild | 07:42:28 | -46.6 | Dark | Down | 21.4 | 148.0 | Low | 07:27:28 - 07:57:28 | 8796 |
| Calipatria | 07:42:24 | -47.3 | Dark | Down | 22.4 | 148.8 | Low | 07:27:24 - 07:57:24 | 8791 |
| Yuma | 07:42:21 | -47.7 | Dark | Down | 23.2 | 149.5 | Low | 07:27:21 - 07:57:21 | 8789 |
| CPSLO | 07:42:40 | -44.8 | Dark | Down | 18.3 | 145.1 | Really Low | 07:27:40 - 07:57:40 | 8779 |
| Wildwood | 07:42:34 | -46.2 | Dark | Down | 20.2 | 146.5 | Low | 07:27:34 - 07:57:34 | 8765 |
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 04HY78, (2020/04/14 07:40UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 10.59 38 7Del Sco 16:00:20.0 -22:37:18 2.3 6.04 45 PPM 264463 15:37:28.5 -26:16:48 6.4 1.26 49 PPM 264516 15:39:36.4 -27:38:36 8.2 0.84 48 PPM 264583 15:42:05.6 -26:50:08 9.9 0.17 48 04HY78 15:42:03.3 -27:00:33 16.6 48 Positions are for J2000
Event circumstances last updated at 2019/06/07 23:27:25 UT
Marc W. Buie, Southwest Research Institute