Event between 99CB119 and star UC4-443-056892 with event index number of 82413
Geocentric closest approach at 2017/04/02 04:08:10 UTC
J2000 position of star is 12:50:33.9 -01:25:41
Equinox of date position of star is 12:51:23.9 -01:30:58
Stellar brightness R=14.9
Star is 111 degrees from the moon.
Moon is 32% illuminated.
TNO apparent brightness V=23.2
[RECON map]
TNO is 41.7 AU from the Sun
and 40.7 AU from the Earth.
The TNO is moving 25.0
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 213 seconds.
The 1-sigma cross-track error in the shadow position is
3135 km.
The TNO has an absolute magnitude Hv=7.0
Diameter=239.9 km assuming a 5% albedo -- 9.6 sec chord
Diameter=97.9 km assuming a 30% albedo -- 3.9 sec chord
Dynamical classification is CLASSICAL
Star training set for 99CB119, (2017/04/02 04:08UT) Object RA Dec mag sep mel Spica 13:26:06.3 -11:15:03 1.0 12.98 122 Vindemiatrix 13:03:02.2 +10:52:00 2.8 12.72 109 38 Vir 12:54:04.3 -03:38:48 6.1 2.22 112 PPM 178882 12:48:59.4 -00:27:12 8.2 1.23 110 PPM 178888 12:50:49.0 -01:37:37 10.0 0.19 111 PPM 178894 12:51:51.5 -01:40:46 10.4 0.19 111 99CB119 12:51:27.1 -01:31:18 14.9 111 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 23.7 km
RECON observability=0.7 and success probability=9.3%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Oroville | 04:11:41 | -16.7 | AT | Up | 19.0 | 115.7 | Really Low | 03:53:27 - 04:29:55 | 3707 |
| Tonasket | 04:11:41 | -16.8 | AT | Up | 19.1 | 115.7 | Really Low | 03:53:27 - 04:29:55 | 3685 |
| Okanogan | 04:11:41 | -16.9 | AT | Up | 19.1 | 115.4 | Really Low | 03:53:27 - 04:29:55 | 3651 |
| Brewster | 04:11:42 | -16.9 | AT | Up | 19.1 | 115.2 | Really Low | 03:53:28 - 04:29:56 | 3621 |
| Manson/Chelan | 04:11:43 | -16.8 | AT | Up | 19.0 | 114.8 | Really Low | 03:53:29 - 04:29:57 | 3595 |
| Entiat | 04:11:44 | -16.8 | AT | Up | 19.0 | 114.7 | Really Low | 03:53:30 - 04:29:58 | 3572 |
| Wenatchee | 04:11:43 | -16.9 | AT | Up | 19.1 | 114.5 | Really Low | 03:53:29 - 04:29:57 | 3546 |
| Ellensburg | 04:11:45 | -16.9 | AT | Up | 19.1 | 114.2 | Really Low | 03:53:31 - 04:29:59 | 3502 |
| Yakima | 04:11:45 | -17.1 | AT | Up | 19.3 | 114.1 | Really Low | 03:53:31 - 04:29:59 | 3462 |
| Toppenish/White Swan | 04:11:46 | -17.3 | AT | Up | 19.5 | 114.1 | Really Low | 03:53:32 - 04:30:00 | 3444 |
| Pasco | 04:11:44 | -18.2 | Dark | Up | 20.3 | 115.2 | Low | 03:53:30 - 04:29:58 | 3455 |
| PNWRO | 04:11:44 | -18.4 | Dark | Up | 20.6 | 115.3 | Low | 03:53:30 - 04:29:58 | 3436 |
| George/Umatilla | 04:11:45 | -18.2 | Dark | Up | 20.3 | 114.9 | Low | 03:53:31 - 04:29:59 | 3419 |
| Goldendale | 04:11:47 | -17.3 | AT | Up | 19.4 | 113.6 | Really Low | 03:53:33 - 04:30:01 | 3383 |
| The Dalles | 04:11:48 | -17.2 | AT | Up | 19.3 | 113.3 | Really Low | 03:53:34 - 04:30:02 | 3354 |
| Maupin | 04:11:49 | -17.4 | AT | Up | 19.5 | 113.2 | Really Low | 03:53:35 - 04:30:03 | 3315 |
| Madras/Culver | 04:11:48 | -17.7 | AT | Up | 19.7 | 113.0 | Really Low | 03:53:34 - 04:30:02 | 3260 |
| Sisters | 04:11:50 | -17.5 | AT | Up | 19.5 | 112.5 | Really Low | 03:53:36 - 04:30:04 | 3219 |
| Redmond | 04:11:49 | -17.8 | AT | Up | 19.8 | 112.8 | Really Low | 03:53:35 - 04:30:03 | 3224 |
| Bend | 04:11:50 | -17.8 | AT | Up | 19.8 | 112.7 | Really Low | 03:53:36 - 04:30:04 | 3200 |
| Oregon Observatory | 04:11:50 | -17.8 | AT | Up | 19.8 | 112.5 | Really Low | 03:53:36 - 04:30:04 | 3181 |
| LaPine/Gilchrist | 04:11:50 | -17.8 | AT | Up | 19.8 | 112.4 | Really Low | 03:53:36 - 04:30:04 | 3159 |
| North Lake | 04:11:50 | -18.4 | Dark | Up | 20.4 | 112.7 | Low | 03:53:36 - 04:30:04 | 3127 |
| Paisley | 04:11:50 | -18.9 | Dark | Up | 20.8 | 112.8 | Low | 03:53:36 - 04:30:04 | 3078 |
| Chiloquin | 04:11:52 | -18.1 | Dark | Up | 20.0 | 111.7 | Really Low | 03:53:38 - 04:30:06 | 3041 |
| Klamath Falls | 04:11:53 | -18.3 | Dark | Up | 20.2 | 111.7 | Low | 03:53:39 - 04:30:07 | 3008 |
| Lakeview | 04:11:50 | -19.2 | Dark | Up | 21.2 | 112.8 | Low | 03:53:36 - 04:30:04 | 3031 |
| Tulelake | 04:11:52 | -18.6 | Dark | Up | 20.5 | 111.8 | Low | 03:53:38 - 04:30:06 | 2987 |
| Cedarville | 04:11:51 | -19.7 | Dark | Up | 21.5 | 112.7 | Low | 03:53:37 - 04:30:05 | 2968 |
| Fall River/Burney | 04:11:52 | -19.0 | Dark | Up | 20.9 | 111.6 | Low | 03:53:38 - 04:30:06 | 2896 |
| Susanville | 04:11:53 | -19.8 | Dark | Up | 21.6 | 111.9 | Low | 03:53:39 - 04:30:07 | 2846 |
| Greenville | 04:11:53 | -19.7 | Dark | Up | 21.5 | 111.6 | Low | 03:53:39 - 04:30:07 | 2812 |
| Niwot | 04:11:25 | -30.0 | Dark | Up | 32.1 | 124.6 | Up | 03:53:11 - 04:29:39 | 3174 |
| Quincy | 04:11:53 | -19.8 | Dark | Up | 21.6 | 111.5 | Low | 03:53:39 - 04:30:07 | 2792 |
| Portola | 04:11:52 | -20.2 | Dark | Up | 22.0 | 111.8 | Low | 03:53:38 - 04:30:06 | 2788 |
| Reno | 04:11:52 | -20.8 | Dark | Up | 22.6 | 112.2 | Low | 03:53:38 - 04:30:06 | 2774 |
| Carson City | 04:11:52 | -20.9 | Dark | Up | 22.7 | 112.1 | Low | 03:53:38 - 04:30:06 | 2738 |
| Yerington | 04:11:51 | -21.5 | Dark | Up | 23.2 | 112.5 | Low | 03:53:37 - 04:30:05 | 2731 |
| Gardnerville | 04:11:52 | -21.1 | Dark | Up | 22.8 | 112.0 | Low | 03:53:38 - 04:30:06 | 2714 |
| Hawthorne | 04:11:51 | -22.0 | Dark | Up | 23.8 | 112.7 | Low | 03:53:37 - 04:30:05 | 2695 |
| Lee Vining | 04:11:52 | -21.9 | Dark | Up | 23.7 | 112.1 | Low | 03:53:38 - 04:30:06 | 2627 |
| Tonopah | 04:11:49 | -23.2 | Dark | Up | 25.0 | 113.6 | Low | 03:53:35 - 04:30:03 | 2677 |
| Bishop | 04:11:51 | -22.7 | Dark | Up | 24.4 | 112.4 | Low | 03:53:37 - 04:30:05 | 2580 |
| Lone Pine | 04:11:51 | -23.3 | Dark | Up | 25.0 | 112.3 | Low | 03:53:37 - 04:30:05 | 2509 |
| Beatty | 04:11:48 | -24.1 | Dark | Up | 25.8 | 113.4 | Low | 03:53:34 - 04:30:02 | 2569 |
| Indian Springs | 04:11:47 | -25.0 | Dark | Up | 26.7 | 114.1 | Low | 03:53:33 - 04:30:01 | 2560 |
| Henderson | 04:11:45 | -25.7 | Dark | Up | 27.4 | 114.4 | Low | 03:53:31 - 04:29:59 | 2521 |
| Searchlight/Boulder City | 04:11:46 | -26.1 | Dark | Up | 27.7 | 114.1 | Low | 03:53:32 - 04:30:00 | 2464 |
| CPSLO | 04:11:56 | -21.9 | Dark | Up | 23.5 | 109.9 | Low | 03:53:42 - 04:30:10 | 2319 |
| Kingman/Dolan Springs | 04:11:44 | -26.8 | Dark | Up | 28.5 | 114.6 | Low | 03:53:30 - 04:29:58 | 2456 |
| Laughlin/Bullhead City | 04:11:45 | -26.4 | Dark | Up | 28.1 | 114.2 | Low | 03:53:31 - 04:29:59 | 2441 |
| DCO | 04:11:42 | -27.5 | Dark | Up | 29.2 | 115.3 | Low | 03:53:28 - 04:29:56 | 2470 |
| Mohave Valley | 04:11:45 | -26.6 | Dark | Up | 28.2 | 114.1 | Low | 03:53:31 - 04:29:59 | 2413 |
| Lake Havasu City | 04:11:45 | -26.9 | Dark | Up | 28.6 | 114.1 | Low | 03:53:31 - 04:29:59 | 2378 |
| Parker | 04:11:45 | -27.1 | Dark | Up | 28.7 | 114.0 | Low | 03:53:31 - 04:29:59 | 2342 |
| Idyllwild | 04:11:50 | -25.5 | Dark | Up | 27.1 | 112.0 | Low | 03:53:36 - 04:30:04 | 2242 |
| Blythe | 04:11:46 | -27.2 | Dark | Up | 28.7 | 113.5 | Low | 03:53:32 - 04:30:00 | 2281 |
| Calipatria | 04:11:48 | -26.7 | Dark | Up | 28.2 | 112.6 | Low | 03:53:34 - 04:30:02 | 2207 |
| Yuma | 04:11:46 | -27.5 | Dark | Up | 29.0 | 113.0 | Low | 03:53:32 - 04:30:00 | 2184 |
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.
Event circumstances last updated at 2016/03/20 17:20:17 UT
Marc W. Buie, Southwest Research Institute