Event between (470596) 08NW4 and star UC4-450-132118 with event index number of 152743
Geocentric closest approach at 2018/09/20 07:53:50 UTC
J2000 position of star is 21:17:20.8 -00:05:16
Equinox of date position of star is 21:18:15.9 -00:00:43
Stellar brightness R=16.8,
use SENSEUP=128
Star is 23 degrees from the moon.
Moon is 80% illuminated.
TNO apparent brightness V=21.1
[RECON map]
TNO is 36.6 AU from the Sun
and 35.8 AU from the Earth.
The TNO is moving 19.0
km/sec on the sky relative to the star, or,
2.6 arcsec/hr.
The 1-sigma error in the time of the event is 346 seconds.
The 1-sigma cross-track error in the shadow position is
5897 km.
The sky-plane scale is
25937.3 km/arcsec.
The TNO has an absolute magnitude Hv=5.4
Diameter=501.2 km assuming a 5% albedo -- 26.4 sec chord
Diameter=204.6 km assuming a 30% albedo -- 10.8 sec chord
Dynamical classification is SCATNEAR
Star training set for 470596, (2018/09/20 07:54UT) Object RA Dec mag sep mel Fomalhaut 22:58:40.9 -29:31:21 1.2 37.99 36 Tarazed 19:47:09.0 +10:39:36 2.7 25.04 31 21 Aqr 21:26:15.5 -03:28:32 5.5 4.00 21 PPM 181230 21:17:32.2 -00:32:34 8.5 0.57 22 PPM 171511 21:16:59.8 +00:16:47 9.5 0.44 23 PPM 181234 21:18:53.2 -00:08:08 11.1 0.19 23 470596 21:18:18.4 -00:00:30 16.8 23 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
2.6 sigma about the mid-time.
The median site spacing is 22.1 km
RECON observability=1.0 and success probability=6.1%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Oroville | 07:49:59 | -40.0 | Dark | Up | 31.2 | 225.8 | Up | 07:34:59 - 08:04:59 | 7188 |
| Tonasket | 07:49:57 | -40.2 | Dark | Up | 31.3 | 225.9 | Up | 07:34:57 - 08:04:57 | 7168 |
| Okanogan | 07:49:59 | -40.6 | Dark | Up | 31.6 | 225.9 | Up | 07:34:59 - 08:04:59 | 7142 |
| Brewster | 07:49:59 | -40.8 | Dark | Up | 31.9 | 225.9 | Up | 07:34:59 - 08:04:59 | 7123 |
| Manson/Chelan | 07:50:00 | -41.0 | Dark | Up | 32.2 | 225.6 | Up | 07:35:00 - 08:05:00 | 7114 |
| Entiat | 07:49:59 | -41.3 | Dark | Up | 32.4 | 225.6 | Up | 07:34:59 - 08:04:59 | 7097 |
| Wenatchee | 07:49:59 | -41.5 | Dark | Up | 32.6 | 225.6 | Up | 07:34:59 - 08:04:59 | 7077 |
| Ellensburg | 07:50:00 | -41.9 | Dark | Up | 33.0 | 225.6 | Up | 07:35:00 - 08:05:00 | 7046 |
| Yakima | 07:50:01 | -42.3 | Dark | Up | 33.3 | 225.8 | Up | 07:35:01 - 08:05:01 | 7010 |
| Toppenish/White Swan | 07:50:01 | -42.5 | Dark | Up | 33.4 | 226.0 | Up | 07:35:01 - 08:05:01 | 6986 |
| Goldendale | 07:50:02 | -43.1 | Dark | Up | 34.0 | 225.9 | Up | 07:35:02 - 08:05:02 | 6948 |
| Pasco | 07:49:56 | -42.7 | Dark | Up | 32.8 | 227.4 | Up | 07:34:56 - 08:04:56 | 6940 |
| The Dalles | 07:50:04 | -43.3 | Dark | Up | 34.3 | 225.6 | Up | 07:35:04 - 08:05:04 | 6938 |
| George/Umatilla | 07:49:58 | -43.0 | Dark | Up | 33.2 | 227.3 | Up | 07:34:58 - 08:04:58 | 6916 |
| PNWRO | 07:49:56 | -42.9 | Dark | Up | 32.9 | 227.7 | Up | 07:34:56 - 08:04:56 | 6911 |
| Maupin | 07:50:02 | -43.7 | Dark | Up | 34.6 | 225.9 | Up | 07:35:02 - 08:05:02 | 6897 |
| Madras/Culver | 07:50:02 | -44.3 | Dark | Up | 35.0 | 226.1 | Up | 07:35:02 - 08:05:02 | 6848 |
| Sisters | 07:50:02 | -44.6 | Dark | Up | 35.4 | 225.8 | Up | 07:35:02 - 08:05:02 | 6831 |
| Redmond | 07:50:00 | -44.6 | Dark | Up | 35.2 | 226.2 | Up | 07:35:00 - 08:05:00 | 6817 |
| Bend | 07:50:00 | -44.8 | Dark | Up | 35.5 | 226.2 | Up | 07:35:00 - 08:05:00 | 6801 |
| Oregon Observatory | 07:50:04 | -45.0 | Dark | Up | 35.6 | 226.2 | Up | 07:35:04 - 08:05:04 | 6789 |
| La Pine/Gilchrist | 07:50:02 | -45.2 | Dark | Up | 35.8 | 226.2 | Up | 07:35:02 - 08:05:02 | 6772 |
| North Lake | 07:50:01 | -45.7 | Dark | Up | 35.8 | 227.1 | Up | 07:35:01 - 08:05:01 | 6715 |
| Chiloquin | 07:50:02 | -46.3 | Dark | Up | 36.8 | 226.4 | Up | 07:35:02 - 08:05:02 | 6680 |
| Paisley | 07:50:00 | -46.2 | Dark | Up | 36.0 | 227.7 | Up | 07:35:00 - 08:05:00 | 6653 |
| Klamath Falls | 07:50:02 | -46.6 | Dark | Up | 37.0 | 226.7 | Up | 07:35:02 - 08:05:02 | 6646 |
| Tulelake | 07:50:02 | -46.9 | Dark | Up | 37.0 | 227.2 | Up | 07:35:02 - 08:05:02 | 6612 |
| Lakeview | 07:49:57 | -46.7 | Dark | Up | 36.2 | 228.2 | Up | 07:34:57 - 08:04:57 | 6600 |
| Cedarville | 07:49:58 | -47.4 | Dark | Up | 36.6 | 228.7 | Up | 07:34:58 - 08:04:58 | 6533 |
| Fall River/Burney | 07:50:00 | -47.8 | Dark | Up | 37.6 | 227.8 | Up | 07:35:00 - 08:05:00 | 6524 |
| Susanville | 07:50:00 | -48.5 | Dark | Up | 37.6 | 228.9 | Up | 07:35:00 - 08:05:00 | 6442 |
| Greenville | 07:50:00 | -48.8 | Dark | Up | 37.9 | 228.7 | Up | 07:35:00 - 08:05:00 | 6425 |
| Gimple | 07:50:00 | -48.8 | Dark | Up | 37.9 | 228.8 | Up | 07:35:00 - 08:05:00 | 6422 |
| Quincy | 07:50:01 | -49.0 | Dark | Up | 38.0 | 228.9 | Up | 07:35:01 - 08:05:01 | 6406 |
| Portola | 07:50:00 | -49.1 | Dark | Up | 37.9 | 229.4 | Up | 07:35:00 - 08:05:00 | 6379 |
| Reno | 07:49:57 | -49.4 | Dark | Up | 37.7 | 230.2 | Up | 07:34:57 - 08:04:57 | 6334 |
| Carson City | 07:49:57 | -49.7 | Dark | Up | 37.9 | 230.5 | Up | 07:34:57 - 08:04:57 | 6299 |
| Gardnerville | 07:49:55 | -50.0 | Dark | Up | 38.0 | 230.7 | Up | 07:34:55 - 08:04:55 | 6274 |
| Yerington | 07:49:53 | -49.9 | Dark | Up | 37.6 | 231.2 | Up | 07:34:53 - 08:04:53 | 6261 |
| Hawthorne | 07:49:53 | -50.4 | Dark | Up | 37.6 | 232.0 | Up | 07:34:53 - 08:04:53 | 6200 |
| Lee Vining | 07:49:55 | -51.0 | Dark | Up | 38.2 | 231.9 | Up | 07:34:55 - 08:04:55 | 6160 |
| Tonopah | 07:49:49 | -50.8 | Dark | Up | 37.0 | 233.7 | Up | 07:34:49 - 08:04:49 | 6111 |
| Bishop | 07:49:53 | -51.6 | Dark | Up | 38.1 | 233.0 | Up | 07:34:53 - 08:04:53 | 6079 |
| Lone Pine | 07:49:52 | -52.3 | Dark | Up | 38.4 | 233.8 | Up | 07:34:52 - 08:04:52 | 5994 |
| Niwot | 07:49:16 | -46.9 | Dark | Up | 28.0 | 243.2 | Low | 07:34:16 - 08:04:16 | 5991 |
| Beatty | 07:49:48 | -52.0 | Dark | Up | 37.4 | 234.8 | Up | 07:34:48 - 08:04:48 | 5984 |
| CPSLO | 07:50:00 | -53.6 | Dark | Up | 40.8 | 232.1 | Up | 07:35:00 - 08:05:00 | 5950 |
| Indian Springs | 07:49:45 | -52.2 | Dark | Up | 36.9 | 236.0 | Up | 07:34:45 - 08:04:45 | 5919 |
| Henderson | 07:49:42 | -52.7 | Dark | Up | 36.7 | 237.0 | Up | 07:34:42 - 08:04:42 | 5845 |
| Searchlight/Boulder City | 07:49:41 | -53.3 | Dark | Up | 37.0 | 237.4 | Up | 07:34:41 - 08:04:41 | 5786 |
| Wildwood | 07:49:55 | -54.8 | Dark | Up | 40.2 | 234.9 | Up | 07:34:55 - 08:04:55 | 5763 |
| Patrick | 07:49:38 | -53.2 | Dark | Up | 36.3 | 238.4 | Up | 07:34:38 - 08:04:38 | 5749 |
| Laughlin/Bullhead City | 07:49:39 | -53.5 | Dark | Up | 36.9 | 237.9 | Up | 07:34:39 - 08:04:39 | 5746 |
| Kingman/Dolan Springs | 07:49:38 | -53.4 | Dark | Up | 36.5 | 238.4 | Up | 07:34:38 - 08:04:38 | 5732 |
| Mohave Valley | 07:49:41 | -53.8 | Dark | Up | 37.0 | 238.1 | Up | 07:34:41 - 08:04:41 | 5718 |
| DCO | 07:49:37 | -53.4 | Dark | Up | 35.9 | 239.2 | Up | 07:34:37 - 08:04:37 | 5697 |
| Lake Havasu City | 07:49:39 | -54.2 | Dark | Up | 37.1 | 238.6 | Up | 07:34:39 - 08:04:39 | 5670 |
| Idyllwild | 07:49:46 | -55.1 | Dark | Up | 39.1 | 236.9 | Up | 07:34:46 - 08:04:46 | 5667 |
| Parker | 07:49:41 | -54.5 | Dark | Up | 37.2 | 238.8 | Up | 07:34:41 - 08:04:41 | 5634 |
| Blythe | 07:49:41 | -55.1 | Dark | Up | 37.7 | 238.9 | Up | 07:34:41 - 08:04:41 | 5590 |
| Calipatria | 07:49:43 | -55.6 | Dark | Up | 38.6 | 238.4 | Up | 07:34:43 - 08:04:43 | 5569 |
| Yuma | 07:49:41 | -56.0 | Dark | Up | 38.2 | 239.5 | Up | 07:34:41 - 08:04:41 | 5497 |
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 470596, (2018/09/20 07:54UT) Object RA Dec mag sep mel Fomalhaut 22:57:39.5 -29:37:23 1.2 37.99 36 Tarazed 19:46:15.6 +10:36:48 2.7 25.04 31 21 Aqr 21:25:17.0 -03:33:25 5.5 4.00 21 PPM 181230 21:16:34.5 -00:37:18 8.5 0.57 22 PPM 171511 21:16:02.3 +00:12:03 9.5 0.44 23 PPM 181234 21:17:55.6 -00:12:53 11.1 0.19 23 470596 21:17:20.8 -00:05:16 16.8 23 Positions are for J2000
Event circumstances last updated at 2017/12/05 18:57:20 UT
Marc W. Buie, Southwest Research Institute