Event between 99CY118 and star GA0960:03970783 with event index number of 172417
Geocentric closest approach at 2018/12/16 11:36:20 UTC
J2000 position of star is 13:58:56.6 +06:10:56
Equinox of date position of star is 13:59:52.0 +06:05:36
Stellar brightness G=16.5,
use SENSEUP=128
Star is 157 degrees from the moon.
Moon is 60% illuminated.
TNO apparent brightness V=24.5
[RECON map]
TNO is 36.3 AU from the Sun
and 36.8 AU from the Earth.
The TNO is moving 23.4
km/sec on the sky relative to the star, or,
3.2 arcsec/hr.
The 1-sigma error in the time of the event is 364 seconds.
The 1-sigma cross-track error in the shadow position is
2425 km.
The sky-plane scale is
26692.5 km/arcsec.
The TNO has an absolute magnitude Hv=8.7
Diameter=111.7 km assuming a 5% albedo -- 4.8 sec chord
Diameter=45.6 km assuming a 30% albedo -- 1.9 sec chord
Dynamical classification is SCATNEAR
Star training set for 99CY118, (2018/12/16 11:36UT) Object RA Dec mag sep mel Arcturus 14:16:31.6 +19:05:05 0.0 13.61 149 Vindemiatrix 13:03:07.2 +10:51:27 2.8 14.82 168 PPM 160305 14:04:52.9 +04:48:38 6.2 1.78 156 PPM 160224 14:00:22.8 +05:36:46 8.4 0.49 157 PPM 160204 13:59:02.3 +06:28:10 9.7 0.43 157 PPM 160200 13:58:42.0 +06:04:29 10.1 0.30 157 99CY118 13:59:53.6 +06:05:27 16.5 157 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 32.1 km
RECON observability=0.3 and success probability=3.8%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Penticton | 11:33:43 | -40.0 | Dark | Down | 17.1 | 100.8 | Really Low | 11:18:43 - 11:48:43 | -2384 |
| Oroville | 11:33:42 | -40.1 | Dark | Down | 17.3 | 100.7 | Really Low | 11:18:42 - 11:48:42 | -2428 |
| Tonasket | 11:33:40 | -40.1 | Dark | Down | 17.3 | 100.6 | Really Low | 11:18:40 - 11:48:40 | -2444 |
| Okanogan | 11:33:39 | -40.3 | Dark | Down | 17.3 | 100.4 | Really Low | 11:18:39 - 11:48:39 | -2467 |
| Brewster | 11:33:38 | -40.5 | Dark | Down | 17.2 | 100.2 | Really Low | 11:18:38 - 11:48:38 | -2485 |
| Manson/Chelan | 11:33:37 | -40.7 | Dark | Down | 17.0 | 99.8 | Really Low | 11:18:37 - 11:48:37 | -2497 |
| Entiat | 11:33:36 | -40.8 | Dark | Down | 17.0 | 99.7 | Really Low | 11:18:36 - 11:48:36 | -2512 |
| Wenatchee | 11:33:35 | -40.9 | Dark | Down | 17.0 | 99.5 | Really Low | 11:18:35 - 11:48:35 | -2530 |
| Ellensburg | 11:33:33 | -41.2 | Dark | Down | 16.9 | 99.2 | Really Low | 11:18:33 - 11:48:33 | -2558 |
| Yakima | 11:33:32 | -41.2 | Dark | Down | 16.9 | 99.1 | Really Low | 11:18:32 - 11:48:32 | -2588 |
| Toppenish/White Swan | 11:33:31 | -41.2 | Dark | Down | 17.1 | 99.1 | Really Low | 11:18:31 - 11:48:31 | -2605 |
| Pasco | 11:33:32 | -40.3 | Dark | Down | 18.0 | 100.1 | Really Low | 11:18:32 - 11:48:32 | -2626 |
| Goldendale | 11:33:29 | -41.5 | Dark | Down | 16.9 | 98.6 | Really Low | 11:18:29 - 11:48:29 | -2643 |
| PNWRO | 11:33:31 | -40.2 | Dark | Down | 18.2 | 100.2 | Really Low | 11:18:31 - 11:48:31 | -2647 |
| George/Umatilla | 11:33:31 | -40.5 | Dark | Down | 17.9 | 99.8 | Really Low | 11:18:31 - 11:48:31 | -2649 |
| The Dalles | 11:33:28 | -41.8 | Dark | Down | 16.6 | 98.3 | Really Low | 11:18:28 - 11:48:28 | -2656 |
| Maupin | 11:33:27 | -41.8 | Dark | Down | 16.8 | 98.3 | Really Low | 11:18:27 - 11:48:27 | -2689 |
| Madras/Culver | 11:33:24 | -41.9 | Dark | Down | 16.8 | 98.0 | Really Low | 11:18:24 - 11:48:24 | -2730 |
| Sisters | 11:33:23 | -42.3 | Dark | Down | 16.5 | 97.6 | Really Low | 11:18:23 - 11:48:23 | -2752 |
| Redmond | 11:33:24 | -42.0 | Dark | Down | 16.8 | 97.9 | Really Low | 11:18:24 - 11:48:24 | -2757 |
| Bend | 11:33:23 | -42.2 | Dark | Down | 16.7 | 97.7 | Really Low | 11:18:23 - 11:48:23 | -2773 |
| Oregon Observatory | 11:33:22 | -42.3 | Dark | Down | 16.7 | 97.6 | Really Low | 11:18:22 - 11:48:22 | -2785 |
| La Pine/Gilchrist | 11:33:21 | -42.3 | Dark | Down | 16.6 | 97.5 | Really Low | 11:18:21 - 11:48:21 | -2800 |
| North Lake | 11:33:20 | -42.0 | Dark | Down | 17.1 | 97.8 | Really Low | 11:18:20 - 11:48:20 | -2840 |
| Chiloquin | 11:33:17 | -42.8 | Dark | Down | 16.5 | 96.9 | Really Low | 11:18:17 - 11:48:17 | -2884 |
| Paisley | 11:33:19 | -41.8 | Dark | Down | 17.5 | 97.9 | Really Low | 11:18:19 - 11:48:19 | -2887 |
| Klamath Falls | 11:33:16 | -42.7 | Dark | Down | 16.6 | 96.8 | Really Low | 11:18:16 - 11:48:16 | -2912 |
| Lakeview | 11:33:17 | -41.7 | Dark | Down | 17.7 | 97.8 | Really Low | 11:18:17 - 11:48:17 | -2929 |
| Tulelake | 11:33:16 | -42.5 | Dark | Down | 16.9 | 97.0 | Really Low | 11:18:16 - 11:48:16 | -2937 |
| Cedarville | 11:33:15 | -41.6 | Dark | Down | 17.9 | 97.7 | Really Low | 11:18:15 - 11:48:15 | -2984 |
| Fall River/Burney | 11:33:13 | -42.6 | Dark | Down | 17.0 | 96.7 | Really Low | 11:18:13 - 11:48:13 | -3011 |
| Susanville | 11:33:11 | -42.1 | Dark | Down | 17.7 | 97.0 | Really Low | 11:18:11 - 11:48:11 | -3070 |
| Greenville | 11:33:10 | -42.3 | Dark | Down | 17.5 | 96.8 | Really Low | 11:18:10 - 11:48:10 | -3090 |
| Gimple | 11:33:10 | -42.3 | Dark | Down | 17.5 | 96.8 | Really Low | 11:18:10 - 11:48:10 | -3091 |
| Quincy | 11:33:10 | -42.3 | Dark | Down | 17.5 | 96.7 | Really Low | 11:18:10 - 11:48:10 | -3107 |
| Portola | 11:33:09 | -42.0 | Dark | Down | 17.9 | 97.0 | Really Low | 11:18:09 - 11:48:09 | -3122 |
| Reno | 11:33:09 | -41.5 | Dark | Down | 18.4 | 97.3 | Really Low | 11:18:09 - 11:48:09 | -3151 |
| Carson City | 11:33:08 | -41.5 | Dark | Down | 18.5 | 97.2 | Really Low | 11:18:08 - 11:48:08 | -3181 |
| Gardnerville | 11:33:08 | -41.5 | Dark | Down | 18.5 | 97.2 | Really Low | 11:18:08 - 11:48:08 | -3202 |
| Yerington | 11:33:09 | -41.0 | Dark | Down | 19.0 | 97.6 | Really Low | 11:18:09 - 11:48:09 | -3204 |
| Hawthorne | 11:33:08 | -40.6 | Dark | Down | 19.4 | 97.8 | Really Low | 11:18:08 - 11:48:08 | -3249 |
| Niwot | 11:33:34 | -30.2 | Dark | Down | 29.3 | 108.2 | Low | 11:18:34 - 11:48:34 | -3254 |
| Lee Vining | 11:33:06 | -41.0 | Dark | Down | 19.1 | 97.2 | Really Low | 11:18:06 - 11:48:06 | -3292 |
| Tonopah | 11:33:08 | -39.5 | Dark | Down | 20.6 | 98.5 | Low | 11:18:08 - 11:48:08 | -3304 |
| Bishop | 11:33:05 | -40.4 | Dark | Down | 19.8 | 97.5 | Really Low | 11:18:05 - 11:48:05 | -3351 |
| Beatty | 11:33:06 | -39.1 | Dark | Down | 21.1 | 98.4 | Low | 11:18:06 - 11:48:06 | -3408 |
| Lone Pine | 11:33:03 | -40.2 | Dark | Down | 20.1 | 97.4 | Low | 11:18:03 - 11:48:03 | -3421 |
| Indian Springs | 11:33:06 | -38.2 | Dark | Down | 22.0 | 99.0 | Low | 11:18:06 - 11:48:06 | -3449 |
| Henderson | 11:33:06 | -37.7 | Dark | Down | 22.7 | 99.2 | Low | 11:18:06 - 11:48:06 | -3503 |
| CPSLO | 11:32:56 | -42.3 | Dark | Down | 18.2 | 95.4 | Really Low | 11:17:56 - 11:47:56 | -3507 |
| Searchlight/Boulder City | 11:33:04 | -37.6 | Dark | Down | 22.8 | 99.0 | Low | 11:18:04 - 11:48:04 | -3555 |
| Patrick | 11:33:06 | -36.7 | Dark | Down | 23.7 | 99.6 | Low | 11:18:06 - 11:48:06 | -3571 |
| Laughlin/Bullhead City | 11:33:04 | -37.3 | Dark | Down | 23.1 | 99.1 | Low | 11:18:04 - 11:48:04 | -3585 |
| Kingman/Dolan Springs | 11:33:05 | -36.8 | Dark | Down | 23.6 | 99.4 | Low | 11:18:05 - 11:48:05 | -3589 |
| DCO | 11:33:06 | -36.1 | Dark | Down | 24.3 | 100.0 | Low | 11:18:06 - 11:48:06 | -3606 |
| Mohave Valley | 11:33:03 | -37.3 | Dark | Down | 23.2 | 99.0 | Low | 11:18:03 - 11:48:03 | -3610 |
| Wildwood | 11:32:55 | -40.5 | Dark | Down | 20.0 | 96.2 | Really Low | 11:17:55 - 11:47:55 | -3637 |
| Lake Havasu City | 11:33:02 | -37.0 | Dark | Down | 23.4 | 98.9 | Low | 11:18:02 - 11:48:02 | -3648 |
| Parker | 11:33:02 | -37.0 | Dark | Down | 23.5 | 98.8 | Low | 11:18:02 - 11:48:02 | -3680 |
| Idyllwild | 11:32:57 | -39.0 | Dark | Down | 21.6 | 97.2 | Low | 11:17:57 - 11:47:57 | -3691 |
| Blythe | 11:32:59 | -37.2 | Dark | Down | 23.3 | 98.4 | Low | 11:17:59 - 11:47:59 | -3725 |
| Calipatria | 11:32:57 | -37.9 | Dark | Down | 22.6 | 97.6 | Low | 11:17:57 - 11:47:57 | -3759 |
| Yuma | 11:32:57 | -37.1 | Dark | Down | 23.4 | 98.0 | Low | 11:17:57 - 11:47:57 | -3809 |
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 99CY118, (2018/12/16 11:36UT) Object RA Dec mag sep mel Arcturus 14:15:38.3 +19:10:20 0.0 13.61 149 Vindemiatrix 13:02:10.3 +10:57:33 2.8 14.82 168 PPM 160305 14:03:55.7 +04:54:03 6.2 1.78 156 PPM 160224 13:59:25.7 +05:42:16 8.4 0.49 157 PPM 160204 13:58:05.5 +06:33:40 9.7 0.43 157 PPM 160200 13:57:45.0 +06:10:00 10.1 0.30 157 99CY118 13:58:56.6 +06:10:56 16.5 157 Positions are for J2000
Event circumstances last updated at 2018/06/05 16:39:13 UT
Marc W. Buie, Southwest Research Institute