Event between (5145) Pholus and star UC4-404-071746 with event index number of 68826
Geocentric closest approach at 2017/06/26 11:10:01 UTC
J2000 position of star is 17:49:54.6 -09:21:18
Equinox of date position of star is 17:50:50.3 -09:21:33
Stellar brightness R=16.1
Star is 138 degrees from the moon.
Moon is 8% illuminated.
TNO apparent brightness V=21.5
[RECON map]
TNO is 27.4 AU from the Sun
and 26.4 AU from the Earth.
The TNO is moving 25.4
km/sec on the sky relative to the star, or,
4.8 arcsec/hr.
The 1-sigma error in the time of the event is 147 seconds.
The 1-sigma cross-track error in the shadow position is
1754 km.
The sky-plane scale is
19152.4 km/arcsec.
The TNO has an absolute magnitude Hv=7.1
Diameter=229.1 km assuming a 5% albedo -- 9.0 sec chord
Diameter=93.5 km assuming a 30% albedo -- 3.7 sec chord
Dynamical classification is CENTAURR
Star training set for 5145, (2017/06/26 11:10UT) Object RA Dec mag sep mel Antares 16:30:28.9 -26:28:10 0.9 25.58 122 35Eta Oph 17:11:22.9 -15:44:43 2.6 11.55 130 PPM 233705 17:54:01.9 -10:54:09 6.1 1.73 139 PPM 233617 17:49:36.8 -10:16:44 8.1 0.97 138 PPM 201095 17:50:52.0 -09:15:31 9.7 0.10 138 5145 17:50:52.2 -09:21:33 16.1 138 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 75.0 km
RECON observability=0.1 and success probability=3.6%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Oroville | 11:07:31 | -6.6 | CT | Down | 14.6 | 236.3 | Really Low | 10:54:45 - 11:20:17 | 2769 |
| Tonasket | 11:07:31 | -6.8 | CT | Down | 14.7 | 236.4 | Really Low | 10:54:45 - 11:20:17 | 2753 |
| Okanogan | 11:07:30 | -7.1 | CT | Down | 15.0 | 236.3 | Really Low | 10:54:44 - 11:20:16 | 2731 |
| Brewster | 11:07:30 | -7.4 | CT | Down | 15.2 | 236.2 | Really Low | 10:54:44 - 11:20:16 | 2715 |
| Manson/Chelan | 11:07:30 | -7.7 | CT | Down | 15.6 | 236.0 | Really Low | 10:54:44 - 11:20:16 | 2705 |
| Entiat | 11:07:29 | -7.9 | CT | Down | 15.7 | 236.0 | Really Low | 10:54:43 - 11:20:15 | 2690 |
| Wenatchee | 11:07:29 | -8.1 | CT | Down | 15.9 | 235.9 | Really Low | 10:54:43 - 11:20:15 | 2673 |
| Ellensburg | 11:07:28 | -8.5 | CT | Down | 16.3 | 235.8 | Really Low | 10:54:42 - 11:20:14 | 2647 |
| Yakima | 11:07:28 | -8.8 | CT | Down | 16.5 | 235.9 | Really Low | 10:54:42 - 11:20:14 | 2618 |
| Toppenish/White Swan | 11:07:27 | -8.9 | CT | Down | 16.5 | 236.1 | Really Low | 10:54:41 - 11:20:13 | 2600 |
| Pasco | 11:07:24 | -8.4 | CT | Down | 15.9 | 237.2 | Really Low | 10:54:38 - 11:20:10 | 2574 |
| Goldendale | 11:07:26 | -9.5 | CT | Down | 17.1 | 235.9 | Really Low | 10:54:40 - 11:20:12 | 2566 |
| The Dalles | 11:07:26 | -9.9 | CT | Down | 17.4 | 235.6 | Really Low | 10:54:40 - 11:20:12 | 2554 |
| PNWRO | 11:07:23 | -8.5 | CT | Down | 15.9 | 237.4 | Really Low | 10:54:37 - 11:20:09 | 2553 |
| George/Umatilla | 11:07:24 | -8.8 | CT | Down | 16.2 | 237.1 | Really Low | 10:54:38 - 11:20:10 | 2552 |
| Maupin | 11:07:25 | -10.2 | CT | Down | 17.6 | 235.8 | Really Low | 10:54:39 - 11:20:11 | 2522 |
| Madras/Culver | 11:07:24 | -10.6 | CT | Down | 18.0 | 235.9 | Really Low | 10:54:38 - 11:20:10 | 2482 |
| Sisters | 11:07:24 | -11.0 | CT | Down | 18.4 | 235.7 | Really Low | 10:54:38 - 11:20:10 | 2463 |
| Redmond | 11:07:23 | -10.9 | CT | Down | 18.2 | 236.0 | Really Low | 10:54:37 - 11:20:09 | 2456 |
| Bend | 11:07:23 | -11.1 | CT | Down | 18.4 | 235.9 | Really Low | 10:54:37 - 11:20:09 | 2442 |
| Oregon Observatory | 11:07:23 | -11.3 | CT | Down | 18.6 | 235.9 | Really Low | 10:54:37 - 11:20:09 | 2430 |
| La Pine/Gilchrist | 11:07:22 | -11.5 | CT | Down | 18.7 | 235.9 | Really Low | 10:54:36 - 11:20:08 | 2416 |
| North Lake | 11:07:21 | -11.5 | CT | Down | 18.6 | 236.5 | Really Low | 10:54:35 - 11:20:07 | 2374 |
| Chiloquin | 11:07:21 | -12.5 | AT | Down | 19.6 | 235.9 | Really Low | 10:54:35 - 11:20:07 | 2335 |
| Paisley | 11:07:19 | -11.8 | CT | Down | 18.7 | 236.9 | Really Low | 10:54:33 - 11:20:05 | 2326 |
| Klamath Falls | 11:07:21 | -12.7 | AT | Down | 19.7 | 236.1 | Really Low | 10:54:35 - 11:20:07 | 2308 |
| Lakeview | 11:07:18 | -12.0 | AT | Down | 18.8 | 237.2 | Really Low | 10:54:32 - 11:20:04 | 2284 |
| Tulelake | 11:07:19 | -12.8 | AT | Down | 19.7 | 236.4 | Really Low | 10:54:33 - 11:20:05 | 2282 |
| Cedarville | 11:07:16 | -12.4 | AT | Down | 19.1 | 237.6 | Really Low | 10:54:30 - 11:20:02 | 2230 |
| Fall River/Burney | 11:07:17 | -13.4 | AT | Down | 20.1 | 236.7 | Low | 10:54:31 - 11:20:03 | 2209 |
| Susanville | 11:07:15 | -13.5 | AT | Down | 20.0 | 237.5 | Really Low | 10:54:29 - 11:20:01 | 2148 |
| Greenville | 11:07:15 | -13.9 | AT | Down | 20.3 | 237.4 | Low | 10:54:29 - 11:20:01 | 2130 |
| Gimple | 11:07:14 | -13.8 | AT | Down | 20.3 | 237.4 | Low | 10:54:28 - 11:20:00 | 2128 |
| Quincy | 11:07:14 | -14.0 | AT | Down | 20.4 | 237.4 | Low | 10:54:28 - 11:20:00 | 2113 |
| Portola | 11:07:13 | -13.9 | AT | Down | 20.2 | 237.8 | Low | 10:54:27 - 11:19:59 | 2096 |
| Reno | 11:07:11 | -13.7 | AT | Down | 19.9 | 238.4 | Really Low | 10:54:25 - 11:19:57 | 2065 |
| Carson City | 11:07:10 | -14.0 | AT | Down | 20.1 | 238.6 | Low | 10:54:24 - 11:19:56 | 2035 |
| Gardnerville | 11:07:10 | -14.1 | AT | Down | 20.2 | 238.7 | Low | 10:54:24 - 11:19:56 | 2014 |
| Yerington | 11:07:09 | -13.8 | AT | Down | 19.8 | 239.1 | Really Low | 10:54:23 - 11:19:55 | 2009 |
| Hawthorne | 11:07:07 | -13.8 | AT | Down | 19.7 | 239.6 | Really Low | 10:54:21 - 11:19:53 | 1963 |
| Lee Vining | 11:07:06 | -14.5 | AT | Down | 20.3 | 239.4 | Low | 10:54:20 - 11:19:52 | 1923 |
| Tonopah | 11:07:03 | -13.4 | AT | Down | 18.9 | 240.9 | Really Low | 10:54:17 - 11:19:49 | 1902 |
| Niwot | 11:06:49 | -5.0 | CT | Down | 9.7 | 249.0 | Really Low | 10:54:03 - 11:19:35 | 1890 |
| Bishop | 11:07:04 | -14.5 | AT | Down | 20.1 | 240.2 | Low | 10:54:18 - 11:19:50 | 1861 |
| Beatty | 11:07:00 | -14.0 | AT | Down | 19.2 | 241.5 | Really Low | 10:54:14 - 11:19:46 | 1796 |
| Lone Pine | 11:07:02 | -14.9 | AT | Down | 20.3 | 240.7 | Low | 10:54:16 - 11:19:48 | 1791 |
| Indian Springs | 11:06:57 | -13.6 | AT | Down | 18.6 | 242.4 | Really Low | 10:54:11 - 11:19:43 | 1751 |
| CPSLO | 11:07:05 | -17.3 | AT | Down | 22.7 | 239.2 | Low | 10:54:19 - 11:19:51 | 1720 |
| Henderson | 11:06:55 | -13.5 | AT | Down | 18.4 | 243.1 | Really Low | 10:54:09 - 11:19:41 | 1693 |
| Searchlight/Boulder City | 11:06:54 | -13.9 | AT | Down | 18.6 | 243.3 | Really Low | 10:54:08 - 11:19:40 | 1643 |
| Patrick | 11:06:52 | -13.3 | AT | Down | 17.8 | 244.0 | Really Low | 10:54:06 - 11:19:38 | 1621 |
| Laughlin/Bullhead City | 11:06:53 | -13.9 | AT | Down | 18.5 | 243.6 | Really Low | 10:54:07 - 11:19:39 | 1610 |
| Kingman/Dolan Springs | 11:06:52 | -13.5 | AT | Down | 18.1 | 243.9 | Really Low | 10:54:06 - 11:19:38 | 1604 |
| Mohave Valley | 11:06:52 | -14.1 | AT | Down | 18.6 | 243.7 | Really Low | 10:54:06 - 11:19:38 | 1586 |
| DCO | 11:06:50 | -13.1 | AT | Down | 17.4 | 244.6 | Really Low | 10:54:04 - 11:19:36 | 1583 |
| Wildwood | 11:06:58 | -17.0 | AT | Down | 21.9 | 241.1 | Low | 10:54:12 - 11:19:44 | 1581 |
| Lake Havasu City | 11:06:51 | -14.2 | AT | Down | 18.6 | 244.0 | Really Low | 10:54:05 - 11:19:37 | 1547 |
| Idyllwild | 11:06:54 | -16.1 | AT | Down | 20.7 | 242.6 | Low | 10:54:08 - 11:19:40 | 1519 |
| Parker | 11:06:50 | -14.4 | AT | Down | 18.7 | 244.1 | Really Low | 10:54:04 - 11:19:36 | 1515 |
| Blythe | 11:06:50 | -14.9 | AT | Down | 19.2 | 244.0 | Really Low | 10:54:04 - 11:19:36 | 1473 |
| Calipatria | 11:06:51 | -15.8 | AT | Down | 20.1 | 243.6 | Low | 10:54:05 - 11:19:37 | 1444 |
| Yuma | 11:06:48 | -15.6 | AT | Down | 19.6 | 244.3 | Really Low | 10:54:02 - 11:19:34 | 1390 |
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 5145, (2017/06/26 11:10UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:55 0.9 25.58 122 35Eta Oph 17:10:22.7 -15:43:29 2.6 11.55 130 PPM 233705 17:53:03.6 -10:53:59 6.1 1.73 139 PPM 233617 17:48:38.8 -10:16:28 8.1 0.97 138 PPM 201095 17:49:54.5 -09:15:17 9.7 0.10 138 5145 17:49:54.6 -09:21:18 16.1 138 Positions are for J2000
Event circumstances last updated at 2016/11/30 19:08:15 UT
Marc W. Buie, Southwest Research Institute