Event between (55638) 02VE95 and star UC4-487-017154 with event index number of 342791
Geocentric closest approach at 2018/12/27 02:43:39 UTC
J2000 position of star is 06:05:32.9 +07:21:45
Equinox of date position of star is 06:06:34.0 +07:21:35
Stellar brightness R=15.4,
use SENSEUP=128
Star is 66 degrees from the moon.
Moon is 75% illuminated.
TNO apparent brightness V=20.1
[RECON map]
TNO is 30.0 AU from the Sun
and 29.0 AU from the Earth.
The TNO is moving 24.3
km/sec on the sky relative to the star, or,
4.2 arcsec/hr.
The 1-sigma error in the time of the event is 102 seconds.
The 1-sigma cross-track error in the shadow position is
1076 km.
The sky-plane scale is
21052.2 km/arcsec.
The TNO has an absolute magnitude Hv=5.3
Diameter=524.8 km assuming a 5% albedo -- 21.6 sec chord
Diameter=214.3 km assuming a 30% albedo -- 8.8 sec chord
Dynamical classification is 3:2E
Star training set for 55638, (2018/12/27 02:44UT) Object RA Dec mag sep mel Betelgeuse 05:56:12.0 +07:24:33 0.4 2.57 69 Bellatrix 05:26:09.0 +06:21:55 1.6 10.08 76 63 Ori 06:05:58.9 +05:25:03 6.4 1.95 67 PPM 149872 06:06:11.3 +07:07:31 7.7 0.25 66 PPM 149882 06:06:43.9 +07:13:50 10.0 0.13 66 55638 06:06:34.6 +07:21:35 15.4 66 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 33.7 km
RECON observability=0.2 and success probability=0.1%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Kelowna | 02:46:25 | -25.2 | Dark | Down | 16.2 | 97.9 | Really Low | 02:37:25 - 02:55:26 | 6260 |
| Summerland | 02:46:26 | -25.0 | Dark | Down | 15.9 | 97.6 | Really Low | 02:37:25 - 02:55:26 | 6260 |
| Penticton | 02:46:27 | -25.1 | Dark | Down | 16.1 | 97.6 | Really Low | 02:37:26 - 02:55:27 | 6234 |
| Okanagan Falls | 02:46:27 | -25.0 | Dark | Down | 16.1 | 97.6 | Really Low | 02:37:27 - 02:55:28 | 6220 |
| Oliver | 02:46:28 | -25.0 | Dark | Down | 16.1 | 97.5 | Really Low | 02:37:28 - 02:55:29 | 6208 |
| Anarchist Mountain Observatory | 02:46:28 | -25.1 | Dark | Down | 16.3 | 97.6 | Really Low | 02:37:28 - 02:55:29 | 6193 |
| Oroville | 02:46:28 | -25.1 | Dark | Down | 16.3 | 97.6 | Really Low | 02:37:28 - 02:55:29 | 6188 |
| Tonasket | 02:46:29 | -25.0 | Dark | Down | 16.3 | 97.5 | Really Low | 02:37:29 - 02:55:30 | 6170 |
| Okanogan | 02:46:31 | -24.9 | Dark | Down | 16.2 | 97.3 | Really Low | 02:37:30 - 02:55:31 | 6145 |
| Brewster | 02:46:32 | -24.7 | Dark | Down | 16.1 | 97.0 | Really Low | 02:37:31 - 02:55:32 | 6126 |
| Manson/Chelan | 02:46:32 | -24.5 | Dark | Down | 15.9 | 96.7 | Really Low | 02:37:32 - 02:55:33 | 6113 |
| Entiat | 02:46:33 | -24.4 | Dark | Down | 15.9 | 96.6 | Really Low | 02:37:33 - 02:55:34 | 6096 |
| Wenatchee | 02:46:34 | -24.3 | Dark | Down | 15.9 | 96.5 | Really Low | 02:37:34 - 02:55:35 | 6077 |
| Ellensburg | 02:46:36 | -24.1 | Dark | Down | 15.8 | 96.2 | Really Low | 02:37:35 - 02:55:36 | 6047 |
| Yakima | 02:46:37 | -24.0 | Dark | Down | 15.8 | 96.1 | Really Low | 02:37:37 - 02:55:38 | 6015 |
| Toppenish/White Swan | 02:46:38 | -24.1 | Dark | Down | 15.9 | 96.1 | Really Low | 02:37:37 - 02:55:38 | 5996 |
| Pasco | 02:46:37 | -24.9 | Dark | Down | 16.8 | 97.0 | Really Low | 02:37:36 - 02:55:37 | 5975 |
| Goldendale | 02:46:39 | -23.7 | Dark | Down | 15.7 | 95.7 | Really Low | 02:37:39 - 02:55:40 | 5956 |
| PNWRO | 02:46:37 | -25.1 | Dark | Down | 17.0 | 97.1 | Really Low | 02:37:37 - 02:55:38 | 5953 |
| George/Umatilla | 02:46:38 | -24.7 | Dark | Down | 16.7 | 96.8 | Really Low | 02:37:38 - 02:55:39 | 5950 |
| The Dalles | 02:46:41 | -23.4 | Dark | Down | 15.5 | 95.3 | Really Low | 02:37:40 - 02:55:41 | 5941 |
| Maupin | 02:46:42 | -23.4 | Dark | Down | 15.6 | 95.3 | Really Low | 02:37:41 - 02:55:42 | 5906 |
| Madras/Culver | 02:46:43 | -23.3 | Dark | Down | 15.6 | 95.1 | Really Low | 02:37:43 - 02:55:44 | 5862 |
| Sisters | 02:46:45 | -22.9 | Dark | Down | 15.3 | 94.7 | Really Low | 02:37:45 - 02:55:46 | 5839 |
| Redmond | 02:46:45 | -23.2 | Dark | Down | 15.6 | 95.0 | Really Low | 02:37:44 - 02:55:45 | 5833 |
| Bend | 02:46:46 | -23.1 | Dark | Down | 15.5 | 94.8 | Really Low | 02:37:45 - 02:55:46 | 5816 |
| Oregon Observatory | 02:46:46 | -22.9 | Dark | Down | 15.5 | 94.7 | Really Low | 02:37:46 - 02:55:47 | 5803 |
| La Pine/Gilchrist | 02:46:46 | -22.9 | Dark | Down | 15.4 | 94.6 | Really Low | 02:37:46 - 02:55:47 | 5787 |
| North Lake | 02:46:47 | -23.2 | Dark | Down | 15.9 | 94.9 | Really Low | 02:37:47 - 02:55:48 | 5745 |
| Chiloquin | 02:46:50 | -22.4 | Dark | Down | 15.3 | 94.0 | Really Low | 02:37:50 - 02:55:51 | 5697 |
| Paisley | 02:46:49 | -23.4 | Dark | Down | 16.2 | 95.0 | Really Low | 02:37:48 - 02:55:49 | 5695 |
| Klamath Falls | 02:46:51 | -22.4 | Dark | Down | 15.4 | 94.0 | Really Low | 02:37:51 - 02:55:52 | 5667 |
| Lakeview | 02:46:50 | -23.4 | Dark | Down | 16.4 | 95.0 | Really Low | 02:37:50 - 02:55:51 | 5650 |
| Tulelake | 02:46:52 | -22.6 | Dark | Down | 15.6 | 94.1 | Really Low | 02:37:51 - 02:55:52 | 5641 |
| Cedarville | 02:46:52 | -23.4 | Dark | Down | 16.6 | 94.9 | Really Low | 02:37:52 - 02:55:53 | 5592 |
| Fall River/Burney | 02:46:54 | -22.4 | Dark | Down | 15.7 | 93.9 | Really Low | 02:37:54 - 02:55:55 | 5563 |
| Susanville | 02:46:56 | -22.9 | Dark | Down | 16.4 | 94.3 | Really Low | 02:37:55 - 02:55:56 | 5500 |
| Greenville | 02:46:57 | -22.6 | Dark | Down | 16.1 | 94.0 | Really Low | 02:37:56 - 02:55:57 | 5479 |
| Gimple | 02:46:57 | -22.7 | Dark | Down | 16.2 | 94.0 | Really Low | 02:37:56 - 02:55:57 | 5478 |
| Quincy | 02:46:57 | -22.6 | Dark | Down | 16.2 | 93.9 | Really Low | 02:37:57 - 02:55:58 | 5461 |
| Portola | 02:46:57 | -22.9 | Dark | Down | 16.5 | 94.2 | Really Low | 02:37:57 - 02:55:58 | 5445 |
| Reno | 02:46:57 | -23.3 | Dark | Down | 17.1 | 94.6 | Really Low | 02:37:57 - 02:55:58 | 5415 |
| Carson City | 02:46:58 | -23.3 | Dark | Down | 17.1 | 94.5 | Really Low | 02:37:57 - 02:55:58 | 5383 |
| Gardnerville | 02:46:59 | -23.3 | Dark | Down | 17.2 | 94.4 | Really Low | 02:37:58 - 02:55:59 | 5361 |
| Yerington | 02:46:58 | -23.7 | Dark | Down | 17.6 | 94.8 | Really Low | 02:37:57 - 02:55:58 | 5359 |
| Niwot | 02:46:35 | -34.5 | Dark | Down | 28.0 | 104.9 | Low | 02:37:35 - 02:55:36 | 5325 |
| Hawthorne | 02:46:59 | -24.0 | Dark | Down | 18.1 | 95.0 | Really Low | 02:37:59 - 02:56:00 | 5312 |
| Lee Vining | 02:47:01 | -23.5 | Dark | Down | 17.7 | 94.5 | Really Low | 02:38:00 - 02:56:01 | 5267 |
| Tonopah | 02:46:58 | -25.0 | Dark | Down | 19.2 | 95.8 | Really Low | 02:37:58 - 02:55:59 | 5256 |
| Bishop | 02:47:01 | -24.0 | Dark | Down | 18.4 | 94.8 | Really Low | 02:38:01 - 02:56:02 | 5205 |
| Beatty | 02:47:01 | -25.2 | Dark | Down | 19.7 | 95.7 | Really Low | 02:38:00 - 02:56:01 | 5146 |
| Lone Pine | 02:47:03 | -24.1 | Dark | Down | 18.7 | 94.8 | Really Low | 02:38:03 - 02:56:04 | 5132 |
| Indian Springs | 02:47:01 | -26.0 | Dark | Down | 20.6 | 96.2 | Low | 02:38:00 - 02:56:01 | 5104 |
| Henderson | 02:47:01 | -26.4 | Dark | Down | 21.2 | 96.5 | Low | 02:38:00 - 02:56:01 | 5048 |
| CPSLO | 02:47:09 | -21.8 | Dark | Down | 16.7 | 92.8 | Really Low | 02:38:09 - 02:56:10 | 5040 |
| Searchlight/Boulder City | 02:47:02 | -26.4 | Dark | Down | 21.3 | 96.3 | Low | 02:38:02 - 02:56:03 | 4994 |
| Patrick | 02:47:01 | -27.2 | Dark | Down | 22.2 | 96.9 | Low | 02:38:00 - 02:56:01 | 4978 |
| Laughlin/Bullhead City | 02:47:02 | -26.6 | Dark | Down | 21.6 | 96.4 | Low | 02:38:02 - 02:56:03 | 4962 |
| Kingman/Dolan Springs | 02:47:01 | -27.0 | Dark | Down | 22.1 | 96.7 | Low | 02:38:01 - 02:56:02 | 4959 |
| DCO | 02:47:01 | -27.7 | Dark | Down | 22.8 | 97.2 | Low | 02:38:00 - 02:56:01 | 4942 |
| Mohave Valley | 02:47:03 | -26.5 | Dark | Down | 21.7 | 96.3 | Low | 02:38:02 - 02:56:03 | 4937 |
| Wildwood | 02:47:10 | -23.1 | Dark | Down | 18.5 | 93.6 | Really Low | 02:38:09 - 02:56:10 | 4904 |
| Lake Havasu City | 02:47:04 | -26.7 | Dark | Down | 21.9 | 96.3 | Low | 02:38:03 - 02:56:04 | 4896 |
| Parker | 02:47:04 | -26.6 | Dark | Down | 22.0 | 96.1 | Low | 02:38:04 - 02:56:05 | 4863 |
| Idyllwild | 02:47:08 | -24.6 | Dark | Down | 20.1 | 94.6 | Low | 02:38:08 - 02:56:09 | 4850 |
| Blythe | 02:47:06 | -26.3 | Dark | Down | 21.8 | 95.8 | Low | 02:38:05 - 02:56:06 | 4816 |
| Calipatria | 02:47:08 | -25.4 | Dark | Down | 21.1 | 95.0 | Low | 02:38:08 - 02:56:09 | 4779 |
| Yuma | 02:47:08 | -26.1 | Dark | Down | 21.9 | 95.4 | Low | 02:38:08 - 02:56:09 | 4728 |
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 55638, (2018/12/27 02:44UT) Object RA Dec mag sep mel Betelgeuse 05:55:10.3 +07:24:26 0.4 2.57 69 Bellatrix 05:25:07.8 +06:20:58 1.6 10.08 76 63 Ori 06:04:58.1 +05:25:12 6.4 1.95 67 PPM 149872 06:05:09.7 +07:07:40 7.7 0.25 66 PPM 149882 06:05:42.3 +07:14:00 10.0 0.13 66 55638 06:05:32.9 +07:21:45 15.4 66 Positions are for J2000
Event circumstances last updated at 2018/10/24 21:09:24 UT
Marc W. Buie, Southwest Research Institute