Event between 04HC79 and star UC4-339-080743 with event index number of 189788
Geocentric closest approach at 2019/05/14 11:09:46 UTC
J2000 position of star is 16:44:24.0 -22:23:49
Equinox of date position of star is 16:45:32.7 -22:25:52
Stellar brightness R=15.7,
use SENSEUP=128
Star is 77 degrees from the moon.
Moon is 77% illuminated.
TNO apparent brightness V=23.4
[RECON map]
TNO is 39.6 AU from the Sun
and 38.6 AU from the Earth.
The TNO is moving 22.6
km/sec on the sky relative to the star, or,
2.9 arcsec/hr.
The 1-sigma error in the time of the event is 355 seconds.
The 1-sigma cross-track error in the shadow position is
2470 km.
The sky-plane scale is
27997.6 km/arcsec.
The TNO has an absolute magnitude Hv=7.4
Diameter=201.4 km assuming a 5% albedo -- 8.9 sec chord
Diameter=82.2 km assuming a 30% albedo -- 3.6 sec chord
Dynamical classification is CLASSICAL
Star training set for 04HC79, (2019/05/14 11:10UT) Object RA Dec mag sep mel Antares 16:30:35.9 -26:28:24 0.9 5.28 75 23Tau Sco 16:37:05.5 -28:15:16 2.8 6.13 77 PPM 232040 16:43:02.2 -19:57:36 5.8 2.54 76 PPM 265879 16:45:27.4 -22:33:30 7.9 0.13 77 PPM 265876 16:45:16.9 -22:19:41 9.9 0.12 77 04HC79 16:45:33.6 -22:25:54 15.7 77 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
2.5 sigma about the mid-time.
The median site spacing is 13.9 km
RECON observability=0.5 and success probability=4.9%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Summerland | 11:08:51 | -9.3 | NT | Down | 13.5 | 206.8 | Really Low | 10:53:51 - 11:23:51 | 2962 |
| Kelowna | 11:08:51 | -9.1 | NT | Down | 13.4 | 207.1 | Really Low | 10:53:51 - 11:23:51 | 2961 |
| Penticton | 11:08:50 | -9.4 | NT | Down | 13.7 | 207.0 | Really Low | 10:53:50 - 11:23:50 | 2950 |
| Okanagan Falls | 11:08:50 | -9.6 | NT | Down | 13.9 | 207.0 | Really Low | 10:53:50 - 11:23:50 | 2944 |
| Oliver | 11:08:49 | -9.7 | NT | Down | 14.1 | 207.0 | Really Low | 10:53:49 - 11:23:49 | 2939 |
| Anarchist Mountain Observatory | 11:08:49 | -9.7 | NT | Down | 14.2 | 207.2 | Really Low | 10:53:49 - 11:23:49 | 2932 |
| Oroville | 11:08:49 | -9.8 | NT | Down | 14.2 | 207.1 | Really Low | 10:53:49 - 11:23:49 | 2930 |
| Tonasket | 11:08:48 | -10.0 | NT | Down | 14.5 | 207.2 | Really Low | 10:53:48 - 11:23:48 | 2922 |
| Okanogan | 11:08:48 | -10.3 | NT | Down | 14.8 | 207.1 | Really Low | 10:53:48 - 11:23:48 | 2911 |
| Brewster | 11:08:48 | -10.6 | NT | Down | 15.1 | 206.9 | Really Low | 10:53:48 - 11:23:48 | 2902 |
| Manson/Chelan | 11:08:49 | -10.9 | NT | Down | 15.4 | 206.6 | Really Low | 10:53:49 - 11:23:49 | 2896 |
| Entiat | 11:08:48 | -11.1 | NT | Down | 15.6 | 206.6 | Really Low | 10:53:48 - 11:23:48 | 2889 |
| Wenatchee | 11:08:49 | -11.3 | NT | Down | 15.9 | 206.5 | Really Low | 10:53:49 - 11:23:49 | 2880 |
| Ellensburg | 11:08:48 | -11.7 | NT | Down | 16.3 | 206.4 | Really Low | 10:53:48 - 11:23:48 | 2866 |
| Yakima | 11:08:47 | -12.0 | NT | Down | 16.7 | 206.4 | Really Low | 10:53:47 - 11:23:47 | 2850 |
| Toppenish/White Swan | 11:08:47 | -12.1 | AT | Down | 16.8 | 206.6 | Really Low | 10:53:47 - 11:23:47 | 2841 |
| Pasco | 11:08:43 | -11.5 | NT | Down | 16.5 | 207.8 | Really Low | 10:53:43 - 11:23:43 | 2829 |
| Goldendale | 11:08:46 | -12.7 | AT | Down | 17.5 | 206.3 | Really Low | 10:53:46 - 11:23:46 | 2821 |
| PNWRO | 11:08:41 | -11.6 | NT | Down | 16.7 | 208.0 | Really Low | 10:53:41 - 11:23:41 | 2818 |
| George/Umatilla | 11:08:43 | -11.9 | NT | Down | 16.9 | 207.6 | Really Low | 10:53:43 - 11:23:43 | 2818 |
| The Dalles | 11:08:47 | -13.0 | AT | Down | 17.8 | 206.0 | Really Low | 10:53:47 - 11:23:47 | 2814 |
| Maupin | 11:08:46 | -13.2 | AT | Down | 18.1 | 206.1 | Really Low | 10:53:46 - 11:23:46 | 2797 |
| Madras/Culver | 11:08:46 | -13.6 | AT | Down | 18.6 | 206.2 | Really Low | 10:53:46 - 11:23:46 | 2774 |
| Sisters | 11:08:47 | -14.1 | AT | Down | 19.1 | 205.8 | Really Low | 10:53:47 - 11:23:47 | 2762 |
| Redmond | 11:08:45 | -13.9 | AT | Down | 19.0 | 206.2 | Really Low | 10:53:45 - 11:23:45 | 2760 |
| Bend | 11:08:45 | -14.1 | AT | Down | 19.2 | 206.1 | Really Low | 10:53:45 - 11:23:45 | 2751 |
| Oregon Observatory | 11:08:46 | -14.3 | AT | Down | 19.4 | 206.0 | Really Low | 10:53:46 - 11:23:46 | 2744 |
| La Pine/Gilchrist | 11:08:46 | -14.5 | AT | Down | 19.6 | 206.0 | Really Low | 10:53:46 - 11:23:46 | 2736 |
| North Lake | 11:08:43 | -14.5 | AT | Down | 19.8 | 206.6 | Really Low | 10:53:43 - 11:23:43 | 2714 |
| Chiloquin | 11:08:45 | -15.5 | AT | Down | 20.7 | 205.8 | Low | 10:53:45 - 11:23:45 | 2688 |
| Paisley | 11:08:41 | -14.7 | AT | Down | 20.2 | 207.0 | Low | 10:53:41 - 11:23:41 | 2687 |
| Klamath Falls | 11:08:44 | -15.7 | AT | Down | 21.0 | 205.9 | Low | 10:53:44 - 11:23:44 | 2672 |
| Lakeview | 11:08:39 | -14.9 | AT | Down | 20.6 | 207.2 | Low | 10:53:39 - 11:23:39 | 2663 |
| Tulelake | 11:08:42 | -15.7 | AT | Down | 21.1 | 206.3 | Low | 10:53:42 - 11:23:42 | 2658 |
| Cedarville | 11:08:37 | -15.3 | AT | Down | 21.1 | 207.5 | Low | 10:53:37 - 11:23:37 | 2631 |
| Fall River/Burney | 11:08:41 | -16.3 | AT | Down | 21.9 | 206.5 | Low | 10:53:41 - 11:23:41 | 2614 |
| Susanville | 11:08:38 | -16.3 | AT | Down | 22.2 | 207.3 | Low | 10:53:38 - 11:23:38 | 2580 |
| Greenville | 11:08:37 | -16.7 | AT | Down | 22.6 | 207.1 | Low | 10:53:37 - 11:23:37 | 2568 |
| Gimple | 11:08:38 | -16.6 | AT | Down | 22.6 | 207.1 | Low | 10:53:38 - 11:23:38 | 2567 |
| Quincy | 11:08:37 | -16.8 | AT | Down | 22.8 | 207.1 | Low | 10:53:37 - 11:23:37 | 2558 |
| Portola | 11:08:35 | -16.7 | AT | Down | 22.7 | 207.6 | Low | 10:53:35 - 11:23:35 | 2549 |
| Reno | 11:08:32 | -16.5 | AT | Down | 22.7 | 208.2 | Low | 10:53:32 - 11:23:32 | 2531 |
| Carson City | 11:08:32 | -16.7 | AT | Down | 23.0 | 208.3 | Low | 10:53:32 - 11:23:32 | 2513 |
| Gardnerville | 11:08:32 | -16.8 | AT | Down | 23.2 | 208.4 | Low | 10:53:32 - 11:23:32 | 2500 |
| Yerington | 11:08:29 | -16.5 | AT | Down | 23.0 | 208.9 | Low | 10:53:29 - 11:23:29 | 2499 |
| Hawthorne | 11:08:27 | -16.5 | AT | Down | 23.2 | 209.5 | Low | 10:53:27 - 11:23:27 | 2471 |
| Lee Vining | 11:08:28 | -17.1 | AT | Down | 23.9 | 209.1 | Low | 10:53:28 - 11:23:28 | 2444 |
| Tonopah | 11:08:21 | -16.0 | AT | Down | 23.0 | 210.8 | Low | 10:53:21 - 11:23:21 | 2436 |
| Niwot | 11:07:48 | -7.3 | NT | Down | 16.0 | 220.6 | Really Low | 10:52:48 - 11:22:48 | 2413 |
| SwRI | 11:07:48 | -7.4 | NT | Down | 16.1 | 220.5 | Really Low | 10:52:48 - 11:22:48 | 2409 |
| Bishop | 11:08:24 | -17.1 | AT | Down | 24.1 | 209.9 | Low | 10:53:24 - 11:23:24 | 2407 |
| Beatty | 11:08:17 | -16.4 | AT | Down | 23.8 | 211.5 | Low | 10:53:17 - 11:23:17 | 2369 |
| Lone Pine | 11:08:21 | -17.4 | AT | Down | 24.6 | 210.4 | Low | 10:53:21 - 11:23:21 | 2363 |
| Indian Springs | 11:08:14 | -16.0 | AT | Down | 23.7 | 212.5 | Low | 10:53:14 - 11:23:14 | 2342 |
| CPSLO | 11:08:29 | -19.8 | Dark | Down | 26.8 | 208.3 | Low | 10:53:29 - 11:23:29 | 2306 |
| Henderson | 11:08:10 | -15.9 | AT | Down | 23.8 | 213.3 | Low | 10:53:10 - 11:23:10 | 2306 |
| Searchlight/Boulder City | 11:08:09 | -16.2 | AT | Down | 24.3 | 213.5 | Low | 10:53:09 - 11:23:09 | 2272 |
| Patrick | 11:08:05 | -15.6 | AT | Down | 23.8 | 214.4 | Low | 10:53:05 - 11:23:05 | 2259 |
| Laughlin/Bullhead City | 11:08:07 | -16.2 | AT | Down | 24.4 | 213.8 | Low | 10:53:07 - 11:23:07 | 2251 |
| Kingman/Dolan Springs | 11:08:06 | -15.8 | AT | Down | 24.1 | 214.3 | Low | 10:53:06 - 11:23:06 | 2248 |
| Mohave Valley | 11:08:07 | -16.3 | AT | Down | 24.6 | 213.9 | Low | 10:53:07 - 11:23:07 | 2235 |
| DCO | 11:08:02 | -15.3 | AT | Down | 23.8 | 215.1 | Low | 10:53:02 - 11:23:02 | 2234 |
| Wildwood | 11:08:20 | -19.4 | Dark | Down | 27.0 | 210.5 | Low | 10:53:20 - 11:23:20 | 2221 |
| Lake Havasu City | 11:08:05 | -16.4 | AT | Down | 24.8 | 214.2 | Low | 10:53:05 - 11:23:05 | 2209 |
| Parker | 11:08:04 | -16.6 | AT | Down | 25.1 | 214.3 | Low | 10:53:04 - 11:23:04 | 2188 |
| Idyllwild | 11:08:12 | -18.4 | Dark | Down | 26.5 | 212.3 | Low | 10:53:12 - 11:23:12 | 2185 |
| Blythe | 11:08:04 | -17.1 | AT | Down | 25.7 | 214.2 | Low | 10:53:04 - 11:23:04 | 2159 |
| Calipatria | 11:08:07 | -18.0 | Dark | Down | 26.5 | 213.5 | Low | 10:53:07 - 11:23:07 | 2137 |
| Yuma | 11:08:03 | -17.7 | AT | Down | 26.4 | 214.4 | Low | 10:53:03 - 11:23:03 | 2102 |
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 04HC79, (2019/05/14 11:10UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 5.28 75 23Tau Sco 16:35:53.0 -28:12:58 2.8 6.13 77 PPM 232040 16:41:53.7 -19:55:27 5.8 2.54 76 PPM 265879 16:44:17.7 -22:31:25 7.9 0.13 77 PPM 265876 16:44:07.3 -22:17:36 9.9 0.12 77 04HC79 16:44:24.0 -22:23:49 15.7 77 Positions are for J2000
Event circumstances last updated at 2019/02/12 07:47:29 UT
Marc W. Buie, Southwest Research Institute