Event between (444030) 04NT33 and star UC4-551-136923 with event index number of 218812
Geocentric closest approach at 2019/10/25 05:29:18 UTC
J2000 position of star is 21:44:25.4 +20:01:04
Equinox of date position of star is 21:45:15.6 +20:06:03
Stellar brightness R=16.3,
use SENSEUP=128
Star is 141 degrees from the moon.
Moon is 12% illuminated.
TNO apparent brightness V=20.8
[RECON map]
TNO is 39.3 AU from the Sun
and 38.8 AU from the Earth.
The TNO is moving 17.7
km/sec on the sky relative to the star, or,
2.3 arcsec/hr.
The 1-sigma error in the time of the event is 129 seconds.
The 1-sigma cross-track error in the shadow position is
4919 km.
The sky-plane scale is
28141.4 km/arcsec.
The TNO has an absolute magnitude Hv=4.7
Diameter=691.9 km assuming a 5% albedo -- 39.0 sec chord
Diameter=282.4 km assuming a 30% albedo -- 15.9 sec chord
Dynamical classification is SCATEXTD
Star training set for 444030, (2019/10/25 05:29UT) Object RA Dec mag sep mel Deneb 20:42:06.5 +45:21:07 1.3 28.41 114 53Eps Cyg 20:47:00.8 +34:02:43 2.5 19.00 122 PPM 113638 21:50:22.5 +20:33:20 6.3 1.26 142 PPM 140632 21:47:47.8 +20:00:59 8.4 0.58 142 PPM 140559 21:44:50.4 +20:00:40 9.0 0.15 141 444030 21:45:20.9 +20:06:34 16.3 141 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 16.3 km
RECON observability=1.0 and success probability=5.6%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Oroville | 05:25:54 | -43.6 | Dark | Down | 52.8 | 229.4 | Up | 05:14:41 - 05:37:07 | 6838 |
| Tonasket | 05:25:55 | -43.7 | Dark | Down | 53.0 | 229.7 | Up | 05:14:42 - 05:37:08 | 6821 |
| Okanogan | 05:25:55 | -43.9 | Dark | Down | 53.2 | 229.8 | Up | 05:14:42 - 05:37:08 | 6806 |
| Manson/Chelan | 05:26:00 | -43.9 | Dark | Down | 53.8 | 229.6 | Up | 05:14:47 - 05:37:13 | 6805 |
| Brewster | 05:25:57 | -44.0 | Dark | Down | 53.5 | 229.8 | Up | 05:14:44 - 05:37:10 | 6799 |
| Entiat | 05:26:00 | -44.0 | Dark | Down | 54.0 | 229.7 | Up | 05:14:47 - 05:37:13 | 6794 |
| Wenatchee | 05:26:03 | -44.1 | Dark | Down | 54.2 | 229.9 | Up | 05:14:50 - 05:37:16 | 6783 |
| Ellensburg | 05:26:04 | -44.3 | Dark | Down | 54.6 | 230.0 | Up | 05:14:51 - 05:37:17 | 6767 |
| Yakima | 05:26:07 | -44.5 | Dark | Down | 54.9 | 230.4 | Up | 05:14:54 - 05:37:20 | 6741 |
| Toppenish/White Swan | 05:26:07 | -44.7 | Dark | Down | 54.9 | 230.9 | Up | 05:14:54 - 05:37:20 | 6716 |
| The Dalles | 05:26:12 | -44.8 | Dark | Down | 55.8 | 230.7 | Up | 05:14:59 - 05:37:25 | 6711 |
| Goldendale | 05:26:09 | -44.9 | Dark | Down | 55.5 | 231.0 | Up | 05:14:56 - 05:37:22 | 6704 |
| Maupin | 05:26:14 | -45.1 | Dark | Down | 56.0 | 231.4 | Up | 05:15:01 - 05:37:27 | 6676 |
| Sisters | 05:26:21 | -45.4 | Dark | Down | 56.8 | 231.8 | Up | 05:15:08 - 05:37:34 | 6648 |
| Madras/Culver | 05:26:15 | -45.4 | Dark | Down | 56.4 | 232.0 | Up | 05:15:02 - 05:37:28 | 6642 |
| Pasco | 05:26:05 | -45.5 | Dark | Down | 54.3 | 232.7 | Up | 05:14:52 - 05:37:18 | 6632 |
| George/Umatilla | 05:26:07 | -45.6 | Dark | Down | 54.6 | 232.8 | Up | 05:14:54 - 05:37:20 | 6622 |
| Redmond | 05:26:20 | -45.6 | Dark | Down | 56.6 | 232.4 | Up | 05:15:07 - 05:37:33 | 6621 |
| Bend | 05:26:18 | -45.6 | Dark | Down | 56.8 | 232.4 | Up | 05:15:05 - 05:37:31 | 6616 |
| Oregon Observatory | 05:26:21 | -45.7 | Dark | Down | 57.0 | 232.5 | Up | 05:15:08 - 05:37:34 | 6612 |
| La Pine/Gilchrist | 05:26:23 | -45.7 | Dark | Down | 57.2 | 232.6 | Up | 05:15:10 - 05:37:36 | 6603 |
| PNWRO | 05:26:05 | -45.8 | Dark | Down | 54.3 | 233.3 | Up | 05:14:52 - 05:37:18 | 6601 |
| Chiloquin | 05:26:28 | -46.2 | Dark | Down | 58.0 | 233.6 | Up | 05:15:15 - 05:37:41 | 6552 |
| North Lake | 05:26:22 | -46.4 | Dark | Down | 57.1 | 234.0 | Up | 05:15:09 - 05:37:35 | 6535 |
| Klamath Falls | 05:26:30 | -46.4 | Dark | Down | 58.2 | 234.1 | Up | 05:15:17 - 05:37:43 | 6524 |
| Tulelake | 05:26:29 | -46.7 | Dark | Down | 58.2 | 234.9 | Up | 05:15:16 - 05:37:42 | 6487 |
| Paisley | 05:26:23 | -46.9 | Dark | Down | 57.2 | 235.2 | Up | 05:15:10 - 05:37:36 | 6476 |
| Lakeview | 05:26:25 | -47.3 | Dark | Down | 57.3 | 236.1 | Up | 05:15:12 - 05:37:38 | 6429 |
| Fall River/Burney | 05:26:32 | -47.3 | Dark | Down | 58.6 | 236.3 | Up | 05:15:19 - 05:37:45 | 6422 |
| Cedarville | 05:26:29 | -47.8 | Dark | Down | 57.6 | 237.2 | Up | 05:15:16 - 05:37:42 | 6374 |
| Greenville | 05:26:36 | -48.1 | Dark | Down | 58.8 | 238.1 | Up | 05:15:23 - 05:37:49 | 6333 |
| Susanville | 05:26:35 | -48.1 | Dark | Down | 58.5 | 238.1 | Up | 05:15:22 - 05:37:48 | 6331 |
| Gimple | 05:26:35 | -48.1 | Dark | Down | 58.8 | 238.2 | Up | 05:15:22 - 05:37:48 | 6327 |
| Quincy | 05:26:38 | -48.2 | Dark | Down | 58.9 | 238.4 | Up | 05:15:25 - 05:37:51 | 6319 |
| Portola | 05:26:35 | -48.6 | Dark | Down | 58.7 | 239.2 | Up | 05:15:22 - 05:37:48 | 6279 |
| Reno | 05:26:37 | -49.1 | Dark | Down | 58.4 | 240.4 | Up | 05:15:24 - 05:37:50 | 6218 |
| Carson City | 05:26:39 | -49.3 | Dark | Down | 58.5 | 241.0 | Up | 05:15:26 - 05:37:52 | 6193 |
| Gardnerville | 05:26:40 | -49.5 | Dark | Down | 58.6 | 241.4 | Up | 05:15:27 - 05:37:53 | 6174 |
| Yerington | 05:26:39 | -49.9 | Dark | Down | 58.2 | 242.0 | Up | 05:15:26 - 05:37:52 | 6138 |
| Hawthorne | 05:26:41 | -50.5 | Dark | Down | 58.0 | 243.3 | Up | 05:15:28 - 05:37:54 | 6072 |
| Lee Vining | 05:26:42 | -50.5 | Dark | Down | 58.6 | 243.6 | Up | 05:15:29 - 05:37:55 | 6067 |
| CPSLO | 05:27:00 | -50.8 | Dark | Down | 60.8 | 246.0 | Up | 05:15:47 - 05:38:13 | 5999 |
| Bishop | 05:26:45 | -51.3 | Dark | Down | 58.3 | 245.3 | Up | 05:15:32 - 05:37:58 | 5978 |
| Tonopah | 05:26:38 | -51.7 | Dark | Down | 57.2 | 245.6 | Up | 05:15:25 - 05:37:51 | 5947 |
| Lone Pine | 05:26:46 | -51.9 | Dark | Down | 58.4 | 246.8 | Up | 05:15:33 - 05:37:59 | 5905 |
| Beatty | 05:26:44 | -52.6 | Dark | Down | 57.3 | 247.8 | Up | 05:15:31 - 05:37:57 | 5839 |
| Wildwood | 05:27:02 | -52.8 | Dark | Down | 59.7 | 250.2 | Up | 05:15:49 - 05:38:15 | 5777 |
| Indian Springs | 05:26:42 | -53.5 | Dark | Down | 56.6 | 249.4 | Up | 05:15:29 - 05:37:55 | 5746 |
| Henderson | 05:26:43 | -54.3 | Dark | Down | 56.3 | 250.9 | Up | 05:15:30 - 05:37:56 | 5664 |
| Idyllwild | 05:26:59 | -54.4 | Dark | Down | 58.3 | 252.7 | Up | 05:15:46 - 05:38:12 | 5623 |
| Searchlight/Boulder City | 05:26:47 | -54.7 | Dark | Down | 56.4 | 251.8 | Up | 05:15:34 - 05:38:00 | 5620 |
| Laughlin/Bullhead City | 05:26:46 | -55.1 | Dark | Down | 56.2 | 252.5 | Up | 05:15:33 - 05:37:59 | 5577 |
| Mohave Valley | 05:26:49 | -55.2 | Dark | Down | 56.3 | 252.9 | Up | 05:15:36 - 05:38:02 | 5558 |
| Patrick | 05:26:44 | -55.4 | Dark | Down | 55.6 | 252.8 | Up | 05:15:31 - 05:37:57 | 5548 |
| Kingman/Dolan Springs | 05:26:43 | -55.4 | Dark | Down | 55.8 | 252.9 | Up | 05:15:30 - 05:37:56 | 5545 |
| Lake Havasu City | 05:26:48 | -55.6 | Dark | Down | 56.2 | 253.7 | Up | 05:15:35 - 05:38:01 | 5514 |
| Calipatria | 05:26:59 | -55.5 | Dark | Down | 57.5 | 254.7 | Up | 05:15:46 - 05:38:12 | 5502 |
| Parker | 05:26:51 | -55.8 | Dark | Down | 56.3 | 254.3 | Up | 05:15:38 - 05:38:04 | 5488 |
| DCO | 05:26:42 | -56.0 | Dark | Down | 55.2 | 253.9 | Up | 05:15:29 - 05:37:55 | 5481 |
| Blythe | 05:26:53 | -55.9 | Dark | Down | 56.7 | 254.8 | Up | 05:15:40 - 05:38:06 | 5472 |
| Yuma | 05:26:58 | -56.4 | Dark | Down | 56.9 | 256.1 | Up | 05:15:45 - 05:38:11 | 5413 |
| Niwot | 05:26:01 | -57.0 | Dark | Down | 47.8 | 254.7 | Up | 05:14:48 - 05:37:14 | 5393 |
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 444030, (2019/10/25 05:29UT) Object RA Dec mag sep mel Deneb 20:41:25.9 +45:16:49 1.3 28.41 114 53Eps Cyg 20:46:13.2 +33:58:19 2.5 19.00 122 PPM 113638 21:49:26.9 +20:27:45 6.3 1.26 142 PPM 140632 21:46:52.1 +19:55:26 8.4 0.58 142 PPM 140559 21:43:54.9 +19:55:11 9.0 0.15 141 444030 21:44:25.4 +20:01:04 16.3 141 Positions are for J2000
Event circumstances last updated at 2017/12/06 19:26:31 UT
Marc W. Buie, Southwest Research Institute