Event between 04TT357 and star TYC21270-00926-1 with event index number of 214982
Geocentric closest approach at 2017/12/25 05:48:41 UTC
J2000 position of star is 04:38:50.0 +18:40:19
Equinox of date position of star is 04:39:52.7 +18:42:23
Stellar brightness V=11.5,
use SENSEUP=8
Star is 81 degrees from the moon.
Moon is 38% illuminated.
TNO apparent brightness V=22.7
[RECON map]
TNO is 32.6 AU from the Sun
and 31.7 AU from the Earth.
The TNO is moving 21.9
km/sec on the sky relative to the star, or,
3.4 arcsec/hr.
The 1-sigma error in the time of the event is 1270 seconds.
The 1-sigma cross-track error in the shadow position is
5950 km.
The sky-plane scale is
22980.4 km/arcsec.
The TNO has an absolute magnitude Hv=7.5
Diameter=190.6 km assuming a 5% albedo -- 8.7 sec chord
Diameter=77.8 km assuming a 30% albedo -- 3.6 sec chord
Dynamical classification is 5:2EEE
Star training set for 04TT357, (2017/12/25 05:49UT) Object RA Dec mag sep mel Aldebaran 04:36:57.3 +16:32:38 0.8 2.27 79 Alnath 05:27:25.8 +28:37:15 1.6 14.71 93 PPM 120015 04:34:35.5 +18:03:12 6.3 1.41 79 PPM 120096 04:39:34.0 +18:46:06 8.4 0.10 80 04TT357 04:39:52.9 +18:42:24 11.5 81 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
0.7 sigma about the mid-time.
The median site spacing is 22.7 km
RECON observability=1.0 and success probability=7.9%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Oroville | 05:48:48 | -54.0 | Dark | Up | 59.1 | 165.1 | Up | 05:33:48 - 06:03:48 | 2600 |
| Tonasket | 05:48:48 | -54.1 | Dark | Up | 59.3 | 165.0 | Up | 05:33:48 - 06:03:48 | 2578 |
| Okanogan | 05:48:49 | -54.3 | Dark | Up | 59.6 | 164.6 | Up | 05:33:49 - 06:03:49 | 2548 |
| Brewster | 05:48:50 | -54.3 | Dark | Up | 59.8 | 164.1 | Up | 05:33:50 - 06:03:50 | 2526 |
| Manson/Chelan | 05:48:51 | -54.2 | Dark | Up | 59.9 | 163.4 | Up | 05:33:51 - 06:03:51 | 2511 |
| Entiat | 05:48:52 | -54.3 | Dark | Up | 60.1 | 163.1 | Up | 05:33:52 - 06:03:52 | 2492 |
| Wenatchee | 05:48:53 | -54.3 | Dark | Up | 60.4 | 162.8 | Up | 05:33:53 - 06:03:53 | 2469 |
| Ellensburg | 05:48:54 | -54.4 | Dark | Up | 60.7 | 162.2 | Up | 05:33:54 - 06:03:54 | 2433 |
| Yakima | 05:48:54 | -54.6 | Dark | Up | 61.1 | 161.9 | Up | 05:33:54 - 06:03:54 | 2395 |
| Toppenish/White Swan | 05:48:54 | -54.8 | Dark | Up | 61.3 | 162.1 | Up | 05:33:54 - 06:03:54 | 2372 |
| Pasco | 05:48:50 | -55.6 | Dark | Up | 61.7 | 164.5 | Up | 05:33:50 - 06:03:50 | 2342 |
| Goldendale | 05:48:56 | -54.8 | Dark | Up | 61.8 | 161.0 | Up | 05:33:56 - 06:03:56 | 2325 |
| PNWRO | 05:48:49 | -55.9 | Dark | Up | 62.0 | 164.8 | Up | 05:33:49 - 06:03:49 | 2315 |
| George/Umatilla | 05:48:51 | -55.7 | Dark | Up | 62.0 | 163.9 | Up | 05:33:51 - 06:03:51 | 2313 |
| The Dalles | 05:48:58 | -54.7 | Dark | Up | 61.9 | 160.2 | Up | 05:33:58 - 06:03:58 | 2310 |
| Maupin | 05:48:58 | -55.0 | Dark | Up | 62.3 | 160.1 | Up | 05:33:58 - 06:03:58 | 2268 |
| Madras/Culver | 05:48:58 | -55.2 | Dark | Up | 62.8 | 159.7 | Up | 05:33:58 - 06:03:58 | 2216 |
| Sisters | 05:49:01 | -55.1 | Dark | Up | 63.0 | 158.5 | Up | 05:34:01 - 06:04:01 | 2190 |
| Redmond | 05:48:59 | -55.3 | Dark | Up | 63.1 | 159.3 | Up | 05:33:59 - 06:03:59 | 2182 |
| Bend | 05:49:00 | -55.3 | Dark | Up | 63.3 | 158.9 | Up | 05:34:00 - 06:04:00 | 2163 |
| Oregon Observatory | 05:49:01 | -55.3 | Dark | Up | 63.4 | 158.5 | Up | 05:34:01 - 06:04:01 | 2148 |
| La Pine/Gilchrist | 05:49:01 | -55.4 | Dark | Up | 63.6 | 158.2 | Up | 05:34:01 - 06:04:01 | 2129 |
| North Lake | 05:49:00 | -55.9 | Dark | Up | 64.2 | 159.1 | Up | 05:34:00 - 06:04:00 | 2077 |
| Chiloquin | 05:49:04 | -55.6 | Dark | Up | 64.5 | 156.6 | Up | 05:34:04 - 06:04:04 | 2026 |
| Paisley | 05:48:59 | -56.4 | Dark | Up | 64.8 | 159.5 | Up | 05:33:59 - 06:03:59 | 2018 |
| Klamath Falls | 05:49:04 | -55.8 | Dark | Up | 64.9 | 156.5 | Up | 05:34:04 - 06:04:04 | 1991 |
| Lakeview | 05:48:59 | -56.7 | Dark | Up | 65.3 | 159.5 | Up | 05:33:59 - 06:03:59 | 1965 |
| Tulelake | 05:49:03 | -56.1 | Dark | Up | 65.2 | 156.9 | Up | 05:34:03 - 06:04:03 | 1960 |
| Cedarville | 05:48:59 | -57.1 | Dark | Up | 66.0 | 159.4 | Up | 05:33:59 - 06:03:59 | 1897 |
| Fall River/Burney | 05:49:04 | -56.5 | Dark | Up | 66.1 | 156.3 | Up | 05:34:04 - 06:04:04 | 1868 |
| Susanville | 05:49:02 | -57.2 | Dark | Up | 66.9 | 157.4 | Up | 05:34:02 - 06:04:02 | 1793 |
| Greenville | 05:49:04 | -57.1 | Dark | Up | 67.0 | 156.5 | Up | 05:34:04 - 06:04:04 | 1771 |
| Gimple | 05:49:03 | -57.2 | Dark | Up | 67.1 | 156.7 | Up | 05:34:03 - 06:04:03 | 1769 |
| Quincy | 05:49:04 | -57.2 | Dark | Up | 67.2 | 156.3 | Up | 05:34:04 - 06:04:04 | 1750 |
| Portola | 05:49:02 | -57.6 | Dark | Up | 67.5 | 157.3 | Up | 05:34:02 - 06:04:02 | 1730 |
| Reno | 05:49:00 | -58.1 | Dark | Up | 67.9 | 158.6 | Up | 05:34:00 - 06:04:00 | 1692 |
| Carson City | 05:49:00 | -58.3 | Dark | Up | 68.3 | 158.3 | Up | 05:34:00 - 06:04:00 | 1656 |
| Gardnerville | 05:49:00 | -58.4 | Dark | Up | 68.5 | 158.2 | Up | 05:34:00 - 06:04:00 | 1630 |
| Yerington | 05:48:58 | -58.8 | Dark | Up | 68.6 | 159.7 | Up | 05:33:58 - 06:03:58 | 1626 |
| Hawthorne | 05:48:57 | -59.3 | Dark | Up | 69.2 | 160.6 | Up | 05:33:57 - 06:03:57 | 1570 |
| Niwot | 05:48:04 | -67.3 | Dark | Up | 67.9 | 195.5 | Up | 05:33:04 - 06:03:04 | 1561 |
| Lee Vining | 05:48:59 | -59.2 | Dark | Up | 69.6 | 158.8 | Up | 05:33:59 - 06:03:59 | 1520 |
| Tonopah | 05:48:52 | -60.5 | Dark | Up | 70.0 | 163.9 | Up | 05:33:52 - 06:03:52 | 1500 |
| Bishop | 05:48:57 | -59.9 | Dark | Up | 70.3 | 160.1 | Up | 05:33:57 - 06:03:57 | 1447 |
| Beatty | 05:48:51 | -61.3 | Dark | Up | 71.2 | 164.2 | Up | 05:33:51 - 06:03:51 | 1374 |
| Lone Pine | 05:48:56 | -60.4 | Dark | Up | 71.2 | 160.3 | Up | 05:33:56 - 06:03:56 | 1363 |
| Indian Springs | 05:48:47 | -62.2 | Dark | Up | 71.7 | 167.1 | Up | 05:33:47 - 06:03:47 | 1323 |
| CPSLO | 05:49:08 | -58.7 | Dark | Up | 71.5 | 151.7 | Up | 05:34:08 - 06:04:08 | 1273 |
| Henderson | 05:48:45 | -62.9 | Dark | Up | 72.4 | 168.8 | Up | 05:33:45 - 06:03:45 | 1258 |
| Searchlight/Boulder City | 05:48:45 | -63.1 | Dark | Up | 72.9 | 168.6 | Up | 05:33:45 - 06:03:45 | 1197 |
| Patrick | 05:48:41 | -63.9 | Dark | Up | 73.1 | 171.9 | Up | 05:33:41 - 06:03:41 | 1176 |
| Laughlin/Bullhead City | 05:48:44 | -63.5 | Dark | Up | 73.3 | 169.5 | Up | 05:33:44 - 06:03:44 | 1161 |
| Kingman/Dolan Springs | 05:48:42 | -63.9 | Dark | Up | 73.3 | 171.2 | Up | 05:33:42 - 06:03:42 | 1155 |
| DCO | 05:48:38 | -64.6 | Dark | Up | 73.5 | 174.1 | Up | 05:33:38 - 06:03:38 | 1134 |
| Mohave Valley | 05:48:44 | -63.6 | Dark | Up | 73.5 | 169.4 | Up | 05:33:44 - 06:03:44 | 1132 |
| Wildwood | 05:49:01 | -60.6 | Dark | Up | 73.3 | 155.9 | Up | 05:34:01 - 06:04:01 | 1111 |
| Lake Havasu City | 05:48:43 | -63.9 | Dark | Up | 74.0 | 170.0 | Up | 05:33:43 - 06:03:43 | 1086 |
| Parker | 05:48:43 | -64.0 | Dark | Up | 74.3 | 169.9 | Up | 05:33:43 - 06:03:43 | 1049 |
| Idyllwild | 05:48:54 | -62.2 | Dark | Up | 74.2 | 161.4 | Up | 05:33:54 - 06:03:54 | 1043 |
| Blythe | 05:48:45 | -63.9 | Dark | Up | 74.8 | 168.5 | Up | 05:33:45 - 06:03:45 | 998 |
| Calipatria | 05:48:50 | -63.3 | Dark | Up | 75.1 | 164.8 | Up | 05:33:50 - 06:03:50 | 960 |
| Yuma | 05:48:46 | -64.1 | Dark | Up | 75.7 | 167.6 | Up | 05:33:46 - 06:03:46 | 901 |
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 04TT357, (2017/12/25 05:49UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:30 0.8 2.27 79 Alnath 05:26:17.5 +28:36:24 1.6 14.71 93 PPM 120015 04:33:33.0 +18:01:00 6.3 1.41 79 PPM 120096 04:38:31.0 +18:44:01 8.4 0.10 80 04TT357 04:38:50.0 +18:40:19 11.5 81 Positions are for J2000
Event circumstances last updated at 2017/12/02 17:07:59 UT
Marc W. Buie, Southwest Research Institute