Event between (42301) 01UR163 and star GA1040:00225361 with event index number of 216905
Geocentric closest approach at 2019/10/05 12:14:00 UTC
J2000 position of star is 02:22:09.1 +14:56:56
Equinox of date position of star is 02:23:09.6 +15:01:56
Stellar brightness G=11.9,
use SENSEUP=16
Star is 118 degrees from the moon.
Moon is 48% illuminated.
TNO apparent brightness V=21.4
[RECON map]
TNO is 53.2 AU from the Sun
and 52.3 AU from the Earth.
The TNO is moving 23.0
km/sec on the sky relative to the star, or,
2.2 arcsec/hr.
The 1-sigma error in the time of the event is 101 seconds.
The 1-sigma cross-track error in the shadow position is
2097 km.
The sky-plane scale is
37954.1 km/arcsec.
The TNO has an absolute magnitude Hv=4.1
Diameter=912.0 km assuming a 5% albedo -- 39.6 sec chord
Diameter=372.3 km assuming a 30% albedo -- 16.2 sec chord
Dynamical classification is 9:4EEEEE
Star training set for 42301, (2019/10/05 12:14UT) Object RA Dec mag sep mel Aldebaran 04:37:03.4 +16:32:51 0.8 32.19 150 6Bet Ari 01:55:44.1 +20:54:14 2.6 8.78 114 19 Ari 02:14:08.2 +15:22:18 5.7 2.22 116 PPM 118152 02:22:52.2 +15:36:31 8.0 0.58 118 PPM 118171 02:23:49.4 +14:55:00 11.4 0.19 118 42301 02:23:14.0 +15:02:17 11.9 119 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 24.4 km
RECON observability=1.0 and success probability=0.9%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Penticton | 12:07:18 | -19.5 | Dark | Down | 42.2 | 238.2 | Up | 11:58:26 - 12:16:11 | 9001 |
| Oroville | 12:07:18 | -19.6 | Dark | Down | 42.5 | 238.7 | Up | 11:58:25 - 12:16:10 | 8941 |
| Tonasket | 12:07:18 | -19.7 | Dark | Down | 42.6 | 238.9 | Up | 11:58:25 - 12:16:10 | 8918 |
| Okanogan | 12:07:18 | -19.9 | Dark | Down | 42.9 | 239.0 | Up | 11:58:25 - 12:16:10 | 8885 |
| Brewster | 12:07:18 | -20.1 | Dark | Down | 43.1 | 239.0 | Up | 11:58:25 - 12:16:10 | 8859 |
| Manson/Chelan | 12:07:19 | -20.4 | Dark | Down | 43.4 | 238.8 | Up | 11:58:26 - 12:16:11 | 8840 |
| Entiat | 12:07:19 | -20.5 | Dark | Down | 43.6 | 238.9 | Up | 11:58:26 - 12:16:11 | 8819 |
| Wenatchee | 12:07:17 | -20.6 | Dark | Down | 43.8 | 239.0 | Up | 11:58:25 - 12:16:10 | 8793 |
| Ellensburg | 12:07:18 | -20.9 | Dark | Down | 44.1 | 239.1 | Up | 11:58:26 - 12:16:11 | 8753 |
| Yakima | 12:07:18 | -21.0 | Dark | Down | 44.3 | 239.5 | Up | 11:58:26 - 12:16:11 | 8712 |
| Toppenish/White Swan | 12:07:17 | -21.0 | Dark | Down | 44.4 | 239.8 | Up | 11:58:25 - 12:16:10 | 8689 |
| Pasco | 12:07:14 | -20.2 | Dark | Down | 43.7 | 241.2 | Up | 11:58:21 - 12:16:06 | 8668 |
| PNWRO | 12:07:13 | -20.1 | Dark | Down | 43.6 | 241.7 | Up | 11:58:20 - 12:16:05 | 8642 |
| George/Umatilla | 12:07:14 | -20.4 | Dark | Down | 44.0 | 241.3 | Up | 11:58:21 - 12:16:06 | 8636 |
| Goldendale | 12:07:19 | -21.4 | Dark | Down | 44.9 | 239.8 | Up | 11:58:26 - 12:16:11 | 8635 |
| The Dalles | 12:07:19 | -21.7 | Dark | Down | 45.2 | 239.6 | Up | 11:58:26 - 12:16:11 | 8615 |
| Maupin | 12:07:19 | -21.7 | Dark | Down | 45.4 | 240.1 | Up | 11:58:26 - 12:16:11 | 8571 |
| Madras/Culver | 12:07:18 | -21.9 | Dark | Down | 45.7 | 240.6 | Up | 11:58:26 - 12:16:11 | 8516 |
| Sisters | 12:07:19 | -22.3 | Dark | Down | 46.1 | 240.4 | Up | 11:58:26 - 12:16:11 | 8485 |
| Redmond | 12:07:18 | -22.1 | Dark | Down | 45.9 | 240.8 | Up | 11:58:26 - 12:16:11 | 8479 |
| Bend | 12:07:18 | -22.2 | Dark | Down | 46.1 | 240.9 | Up | 11:58:25 - 12:16:10 | 8458 |
| Oregon Observatory | 12:07:18 | -22.4 | Dark | Down | 46.2 | 240.9 | Up | 11:58:26 - 12:16:11 | 8441 |
| La Pine/Gilchrist | 12:07:19 | -22.4 | Dark | Down | 46.4 | 241.0 | Up | 11:58:26 - 12:16:11 | 8420 |
| North Lake | 12:07:16 | -22.1 | Dark | Down | 46.2 | 242.0 | Up | 11:58:24 - 12:16:09 | 8371 |
| Paisley | 12:07:15 | -22.0 | Dark | Down | 46.2 | 242.9 | Up | 11:58:22 - 12:16:07 | 8311 |
| Chiloquin | 12:07:19 | -23.0 | Dark | Down | 47.1 | 241.7 | Up | 11:58:26 - 12:16:11 | 8308 |
| Klamath Falls | 12:07:19 | -23.0 | Dark | Down | 47.2 | 242.1 | Up | 11:58:26 - 12:16:11 | 8271 |
| Lakeview | 12:07:14 | -22.0 | Dark | Down | 46.3 | 243.6 | Up | 11:58:22 - 12:16:07 | 8257 |
| Tulelake | 12:07:18 | -22.9 | Dark | Down | 47.2 | 242.7 | Up | 11:58:25 - 12:16:10 | 8241 |
| Cedarville | 12:07:13 | -22.1 | Dark | Down | 46.5 | 244.4 | Up | 11:58:20 - 12:16:05 | 8186 |
| Fall River/Burney | 12:07:17 | -23.1 | Dark | Down | 47.5 | 243.6 | Up | 11:58:24 - 12:16:09 | 8145 |
| Susanville | 12:07:14 | -22.7 | Dark | Down | 47.3 | 245.0 | Up | 11:58:22 - 12:16:07 | 8073 |
| Greenville | 12:07:14 | -23.0 | Dark | Down | 47.6 | 244.9 | Up | 11:58:22 - 12:16:07 | 8046 |
| Gimple | 12:07:15 | -22.9 | Dark | Down | 47.6 | 245.0 | Up | 11:58:22 - 12:16:07 | 8045 |
| Quincy | 12:07:15 | -23.0 | Dark | Down | 47.7 | 245.2 | Up | 11:58:22 - 12:16:07 | 8024 |
| Portola | 12:07:12 | -22.7 | Dark | Down | 47.4 | 245.7 | Up | 11:58:20 - 12:16:05 | 8007 |
| Niwot | 12:06:33 | -11.2 | CT | Down | 36.3 | 258.5 | Up | 11:57:41 - 12:15:26 | 7993 |
| Reno | 12:07:11 | -22.3 | Dark | Down | 47.1 | 246.6 | Up | 11:58:19 - 12:16:04 | 7974 |
| Carson City | 12:07:11 | -22.3 | Dark | Down | 47.2 | 247.0 | Up | 11:58:19 - 12:16:04 | 7936 |
| Yerington | 12:07:09 | -21.9 | Dark | Down | 46.8 | 247.8 | Up | 11:58:17 - 12:16:02 | 7911 |
| Gardnerville | 12:07:10 | -22.4 | Dark | Down | 47.3 | 247.3 | Up | 11:58:18 - 12:16:03 | 7910 |
| Hawthorne | 12:07:07 | -21.6 | Dark | Down | 46.6 | 248.7 | Up | 11:58:14 - 12:15:59 | 7858 |
| Lee Vining | 12:07:08 | -22.1 | Dark | Down | 47.2 | 248.9 | Up | 11:58:16 - 12:16:01 | 7801 |
| Tonopah | 12:07:03 | -20.6 | Dark | Down | 45.8 | 250.5 | Up | 11:58:10 - 12:15:55 | 7799 |
| Bishop | 12:07:06 | -21.6 | Dark | Down | 46.9 | 250.1 | Up | 11:58:14 - 12:15:59 | 7732 |
| Beatty | 12:07:00 | -20.5 | Dark | Down | 45.8 | 252.0 | Up | 11:58:08 - 12:15:53 | 7672 |
| Lone Pine | 12:07:04 | -21.5 | Dark | Down | 46.9 | 251.2 | Up | 11:58:12 - 12:15:57 | 7648 |
| Indian Springs | 12:06:57 | -19.7 | Dark | Down | 45.1 | 253.2 | Up | 11:58:05 - 12:15:50 | 7632 |
| Henderson | 12:06:55 | -19.2 | Dark | Down | 44.7 | 254.3 | Up | 11:58:02 - 12:15:47 | 7571 |
| CPSLO | 12:07:12 | -23.8 | Dark | Down | 49.3 | 250.3 | Up | 11:58:19 - 12:16:04 | 7527 |
| Searchlight/Boulder City | 12:06:55 | -19.2 | Dark | Down | 44.8 | 254.9 | Up | 11:58:02 - 12:15:47 | 7508 |
| Patrick | 12:06:51 | -18.4 | Dark | Down | 44.0 | 255.7 | Up | 11:57:59 - 12:15:44 | 7498 |
| Kingman/Dolan Springs | 12:06:52 | -18.6 | Dark | Down | 44.2 | 255.8 | Up | 11:58:00 - 12:15:45 | 7475 |
| Laughlin/Bullhead City | 12:06:53 | -19.0 | Dark | Down | 44.6 | 255.4 | Up | 11:58:01 - 12:15:46 | 7474 |
| DCO | 12:06:49 | -17.9 | AT | Down | 43.5 | 256.6 | Up | 11:57:57 - 12:15:42 | 7462 |
| Mohave Valley | 12:06:54 | -19.0 | Dark | Down | 44.7 | 255.7 | Up | 11:58:01 - 12:15:46 | 7445 |
| Lake Havasu City | 12:06:53 | -18.9 | Dark | Down | 44.6 | 256.3 | Up | 11:58:00 - 12:15:45 | 7400 |
| Wildwood | 12:07:05 | -22.4 | Dark | Down | 48.0 | 253.3 | Up | 11:58:12 - 12:15:57 | 7380 |
| Parker | 12:06:52 | -18.9 | Dark | Down | 44.6 | 256.6 | Up | 11:58:00 - 12:15:45 | 7362 |
| Idyllwild | 12:06:59 | -20.9 | Dark | Down | 46.7 | 255.2 | Up | 11:58:07 - 12:15:52 | 7329 |
| Blythe | 12:06:53 | -19.2 | Dark | Down | 45.0 | 256.9 | Up | 11:58:00 - 12:15:45 | 7306 |
| Calipatria | 12:06:55 | -20.1 | Dark | Down | 45.9 | 256.7 | Up | 11:58:03 - 12:15:48 | 7257 |
| Yuma | 12:06:53 | -19.4 | Dark | Down | 45.2 | 257.8 | Up | 11:58:00 - 12:15:45 | 7205 |
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 42301, (2019/10/05 12:14UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:30 0.8 32.19 150 6Bet Ari 01:54:38.5 +20:48:27 2.6 8.78 114 19 Ari 02:13:03.4 +15:16:47 5.7 2.22 116 PPM 118152 02:21:47.2 +15:31:09 8.0 0.58 118 PPM 118171 02:22:44.6 +14:49:39 11.4 0.19 118 42301 02:22:09.1 +14:56:56 11.9 118 Positions are for J2000
Event circumstances last updated at 2018/06/12 07:46:41 UT
Marc W. Buie, Southwest Research Institute