Event between (54598) Bienor and star UC4-616-005288 with event index number of 49185
Geocentric closest approach at 2015/12/05 07:45:45 UTC
J2000 position of star is 01:57:53.8 +33:09:24
Equinox of date position of star is 01:58:49.6 +33:14:01
Stellar brightness R=16.2
Star is 140 degrees from the moon.
Moon is 32% illuminated.
TNO apparent brightness V=19.6
[RECON map]
TNO is 15.7 AU from the Sun
and 14.9 AU from the Earth.
The TNO is moving 18.3
km/sec on the sky relative to the star, or,
6.1 arcsec/hr.
The 1-sigma error in the time of the event is 54 seconds.
The 1-sigma cross-track error in the shadow position is
891 km.
The TNO has an absolute magnitude Hv=7.5
Diameter=190.6 km assuming a 5% albedo -- 10.4 sec chord
Diameter=77.8 km assuming a 30% albedo -- 4.3 sec chord
Dynamical classification is CENTAURR
Star training set for 54598, (2015/12/05 07:46UT) Object RA Dec mag sep mel Aldebaran 04:36:50.2 +16:32:24 0.8 39.22 115 57Gam1And 02:04:53.0 +42:24:19 2.3 9.25 133 3Eps Tri 02:03:54.0 +33:21:38 5.5 1.07 140 PPM 066844 02:00:02.9 +33:17:06 7.7 0.26 140 PPM 066826 01:59:02.9 +33:01:43 9.9 0.21 140 54598 01:58:49.6 +33:14:01 16.2 140 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 27.2 km
RECON observability=1.0 and success probability=38.8%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Oroville | 07:42:31 | -63.4 | Dark | Down | 56.1 | 257.5 | Up | 07:37:31 - 07:47:31 | -175 |
| Tonasket | 07:42:31 | -63.6 | Dark | Down | 56.2 | 257.8 | Up | 07:37:31 - 07:47:31 | -201 |
| Okanogan | 07:42:32 | -63.9 | Dark | Down | 56.4 | 258.2 | Up | 07:37:32 - 07:47:32 | -236 |
| Brewster | 07:42:33 | -64.2 | Dark | Down | 56.5 | 258.4 | Up | 07:37:33 - 07:47:33 | -264 |
| Manson/Chelan | 07:42:35 | -64.4 | Dark | Down | 56.8 | 258.4 | Up | 07:37:35 - 07:47:35 | -282 |
| Entiat | 07:42:35 | -64.6 | Dark | Down | 56.9 | 258.6 | Up | 07:37:35 - 07:47:35 | -306 |
| Wenatchee | 07:42:35 | -64.9 | Dark | Down | 57.0 | 258.9 | Up | 07:37:35 - 07:47:35 | -333 |
| Ellensburg | 07:42:37 | -65.3 | Dark | Down | 57.2 | 259.4 | Up | 07:37:37 - 07:47:37 | -375 |
| Yakima | 07:42:37 | -65.7 | Dark | Down | 57.3 | 260.0 | Up | 07:37:37 - 07:47:37 | -420 |
| Toppenish/White Swan | 07:42:37 | -65.9 | Dark | Down | 57.3 | 260.5 | Up | 07:37:37 - 07:47:37 | -445 |
| Pasco | 07:42:32 | -66.1 | Dark | Down | 56.4 | 261.7 | Up | 07:37:32 - 07:47:32 | -474 |
| Pacific NW Region. Obs. | 07:42:31 | -66.3 | Dark | Down | 56.3 | 262.3 | Up | 07:37:31 - 07:47:31 | -503 |
| Umatilla | 07:42:33 | -66.4 | Dark | Down | 56.6 | 262.1 | Up | 07:37:33 - 07:47:33 | -508 |
| Goldendale | 07:42:39 | -66.4 | Dark | Down | 57.6 | 260.9 | Up | 07:37:39 - 07:47:39 | -501 |
| The Dalles | 07:42:40 | -66.6 | Dark | Down | 57.9 | 261.0 | Up | 07:37:40 - 07:47:40 | -521 |
| Maupin | 07:42:40 | -67.0 | Dark | Down | 57.9 | 261.7 | Up | 07:37:40 - 07:47:40 | -568 |
| Madras/Culver | 07:42:41 | -67.6 | Dark | Down | 58.0 | 262.5 | Up | 07:37:41 - 07:47:41 | -627 |
| Sisters | 07:42:42 | -67.8 | Dark | Down | 58.4 | 262.7 | Up | 07:37:42 - 07:47:42 | -658 |
| Redmond | 07:42:41 | -67.9 | Dark | Down | 58.1 | 263.1 | Up | 07:37:41 - 07:47:41 | -666 |
| Bend | 07:42:42 | -68.1 | Dark | Down | 58.2 | 263.3 | Up | 07:37:42 - 07:47:42 | -687 |
| Oregon Observatory | 07:42:42 | -68.3 | Dark | Down | 58.3 | 263.5 | Up | 07:37:42 - 07:47:42 | -705 |
| LaPine/Gilchrist | 07:42:43 | -68.5 | Dark | Down | 58.4 | 263.8 | Up | 07:37:43 - 07:47:43 | -726 |
| North Lake | 07:42:41 | -69.0 | Dark | Down | 58.0 | 264.9 | Up | 07:37:41 - 07:47:41 | -782 |
| Paisley | 07:42:40 | -69.5 | Dark | Down | 57.8 | 266.1 | Up | 07:37:40 - 07:47:40 | -847 |
| Chiloquin | 07:42:46 | -69.5 | Dark | Down | 58.7 | 265.3 | Up | 07:37:46 - 07:47:46 | -843 |
| Klamath Falls | 07:42:46 | -69.9 | Dark | Down | 58.7 | 265.9 | Up | 07:37:46 - 07:47:46 | -881 |
| Lakeview | 07:42:40 | -70.1 | Dark | Down | 57.7 | 267.0 | Up | 07:37:40 - 07:47:40 | -905 |
| Tulelake | 07:42:45 | -70.2 | Dark | Down | 58.5 | 266.6 | Up | 07:37:45 - 07:47:45 | -915 |
| Cedarville | 07:42:40 | -70.7 | Dark | Down | 57.6 | 268.2 | Up | 07:37:40 - 07:47:40 | -979 |
| Fall River/Burney | 07:42:46 | -71.1 | Dark | Down | 58.5 | 268.1 | Up | 07:37:46 - 07:47:46 | -1015 |
| Susanville | 07:42:43 | -71.8 | Dark | Down | 57.9 | 269.6 | Up | 07:37:43 - 07:47:43 | -1095 |
| Greenville | 07:42:45 | -72.0 | Dark | Down | 58.2 | 269.9 | Up | 07:37:45 - 07:47:45 | -1120 |
| Niwot | 07:41:48 | -69.2 | Dark | Down | 46.3 | 278.8 | Up | 07:36:48 - 07:46:48 | -1216 |
| Quincy | 07:42:45 | -72.2 | Dark | Down | 58.2 | 270.2 | Up | 07:37:45 - 07:47:45 | -1143 |
| Portola | 07:42:43 | -72.4 | Dark | Down | 57.8 | 270.7 | Up | 07:37:43 - 07:47:43 | -1163 |
| Reno | 07:42:41 | -72.7 | Dark | Down | 57.3 | 271.5 | Up | 07:37:41 - 07:47:41 | -1201 |
| Carson City | 07:42:42 | -73.1 | Dark | Down | 57.3 | 272.1 | Up | 07:37:42 - 07:47:42 | -1240 |
| Yerington | 07:42:39 | -73.3 | Dark | Down | 56.8 | 272.8 | Up | 07:37:39 - 07:47:39 | -1269 |
| Gardnerville | 07:42:42 | -73.3 | Dark | Down | 57.2 | 272.5 | Up | 07:37:42 - 07:47:42 | -1267 |
| Hawthorne | 07:42:38 | -73.8 | Dark | Down | 56.3 | 273.8 | Up | 07:37:38 - 07:47:38 | -1326 |
| Lee Vining | 07:42:40 | -74.3 | Dark | Down | 56.7 | 274.4 | Up | 07:37:40 - 07:47:40 | -1382 |
| Tonopah | 07:42:33 | -74.3 | Dark | Down | 55.2 | 275.2 | Up | 07:37:33 - 07:47:33 | -1393 |
| Bishop | 07:42:38 | -75.0 | Dark | Down | 56.1 | 275.6 | Up | 07:37:38 - 07:47:38 | -1456 |
| Lone Pine | 07:42:38 | -75.7 | Dark | Down | 55.7 | 276.9 | Up | 07:37:38 - 07:47:38 | -1542 |
| Beatty | 07:42:32 | -75.4 | Dark | Down | 54.7 | 277.1 | Up | 07:37:32 - 07:47:32 | -1524 |
| Indian Springs | 07:42:28 | -75.6 | Dark | Down | 53.8 | 278.0 | Up | 07:37:28 - 07:47:28 | -1570 |
| Henderson | 07:42:26 | -76.0 | Dark | Down | 53.2 | 279.0 | Up | 07:37:26 - 07:47:26 | -1634 |
| Searchlight/Boulder City | 07:42:27 | -76.6 | Dark | Down | 53.1 | 279.8 | Up | 07:37:27 - 07:47:27 | -1697 |
| San Luis Obispo | 07:42:50 | -76.8 | Dark | Down | 57.6 | 277.8 | Up | 07:37:50 - 07:47:50 | -1648 |
| Kingman/Dolan Springs | 07:42:24 | -76.7 | Dark | Down | 52.3 | 280.5 | Up | 07:37:24 - 07:47:24 | -1733 |
| Laughlin/Bullhead City | 07:42:25 | -76.8 | Dark | Down | 52.7 | 280.3 | Up | 07:37:25 - 07:47:25 | -1732 |
| DCO | 07:42:20 | -76.5 | Dark | Down | 51.6 | 280.9 | Up | 07:37:20 - 07:47:20 | -1749 |
| Mohave Valley | 07:42:26 | -77.1 | Dark | Down | 52.7 | 280.7 | Up | 07:37:26 - 07:47:26 | -1761 |
| Lake Havasu City | 07:42:25 | -77.4 | Dark | Down | 52.4 | 281.3 | Up | 07:37:25 - 07:47:25 | -1807 |
| Parker | 07:42:26 | -77.7 | Dark | Down | 52.3 | 281.7 | Up | 07:37:26 - 07:47:26 | -1845 |
| Idyllwild | 07:42:36 | -78.5 | Dark | Down | 54.2 | 281.5 | Up | 07:37:36 - 07:47:36 | -1867 |
| Blythe | 07:42:28 | -78.3 | Dark | Down | 52.4 | 282.3 | Up | 07:37:28 - 07:47:28 | -1899 |
| Calipatria | 07:42:32 | -79.0 | Dark | Down | 53.1 | 282.6 | Up | 07:37:32 - 07:47:32 | -1944 |
| Yuma | 07:42:29 | -79.2 | Dark | Down | 52.3 | 283.4 | Up | 07:37:29 - 07:47:29 | -1998 |
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.
Event circumstances last updated at 2015/12/01 18:21:52 UT
Marc W. Buie, Southwest Research Institute