Event between (54598) Bienor and star UC4-668-023391 with event index number of 225254
Geocentric closest approach at 2019/12/03 13:33:19 UTC
J2000 position of star is 04:04:39.1 +43:27:23
Equinox of date position of star is 04:05:54.3 +43:30:16
Stellar brightness R=15.3,
use SENSEUP=128
Star is 96 degrees from the moon.
Moon is 43% illuminated.
TNO apparent brightness V=19.1
[RECON map]
TNO is 14.5 AU from the Sun
and 13.6 AU from the Earth.
The TNO is moving 22.0
km/sec on the sky relative to the star, or,
8.0 arcsec/hr.
The 1-sigma error in the time of the event is 39 seconds.
The 1-sigma cross-track error in the shadow position is
564 km.
The sky-plane scale is
9844.5 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 -- 3.5 sec chord
Dynamical classification is CENTAURR
Star training set for 54598, (2019/12/03 13:33UT) Object RA Dec mag sep mel Aldebaran 04:37:04.0 +16:32:52 0.8 27.75 96 Mirphak 03:25:45.3 +49:55:50 1.8 9.41 91 PPM 046963 04:19:31.2 +42:11:18 6.1 2.80 98 PPM 046793 04:07:48.8 +43:28:11 7.9 0.32 96 PPM 046760 04:05:20.7 +43:25:48 9.0 0.15 96 54598 04:06:02.5 +43:30:34 15.3 96 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 18.8 km
RECON observability=0.7 and success probability=0.0%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Niwot | 13:29:08 | -7.1 | CT | Down | 15.7 | 314.2 | Really Low | 13:25:22 - 13:32:53 | 5419 |
| Oroville | 13:29:33 | -19.3 | Dark | Down | 29.1 | 304.0 | Low | 13:25:47 - 13:33:18 | 5199 |
| Tonasket | 13:29:32 | -19.3 | Dark | Down | 29.0 | 304.1 | Low | 13:25:47 - 13:33:18 | 5183 |
| Okanogan | 13:29:31 | -19.3 | Dark | Down | 28.9 | 304.2 | Low | 13:25:45 - 13:33:16 | 5153 |
| Brewster | 13:29:30 | -19.4 | Dark | Down | 28.8 | 304.2 | Low | 13:25:44 - 13:33:15 | 5124 |
| Manson/Chelan | 13:29:30 | -19.6 | Dark | Down | 28.9 | 304.1 | Low | 13:25:44 - 13:33:15 | 5090 |
| Entiat | 13:29:29 | -19.6 | Dark | Down | 28.8 | 304.2 | Low | 13:25:44 - 13:33:15 | 5071 |
| Wenatchee | 13:29:29 | -19.6 | Dark | Down | 28.7 | 304.2 | Low | 13:25:43 - 13:33:14 | 5048 |
| Pasco | 13:29:24 | -18.6 | Dark | Down | 27.4 | 305.4 | Low | 13:25:39 - 13:33:10 | 5030 |
| PNWRO | 13:29:23 | -18.4 | Dark | Down | 27.1 | 305.6 | Low | 13:25:38 - 13:33:09 | 5024 |
| Ellensburg | 13:29:27 | -19.7 | Dark | Down | 28.6 | 304.3 | Low | 13:25:41 - 13:33:12 | 5008 |
| George/Umatilla | 13:29:23 | -18.7 | Dark | Down | 27.4 | 305.4 | Low | 13:25:37 - 13:33:08 | 4994 |
| Yakima | 13:29:26 | -19.6 | Dark | Down | 28.4 | 304.5 | Low | 13:25:40 - 13:33:11 | 4978 |
| Toppenish/White Swan | 13:29:25 | -19.5 | Dark | Down | 28.2 | 304.6 | Low | 13:25:40 - 13:33:11 | 4972 |
| Goldendale | 13:29:24 | -19.6 | Dark | Down | 28.1 | 304.7 | Low | 13:25:39 - 13:33:10 | 4910 |
| The Dalles | 13:29:23 | -19.8 | Dark | Down | 28.2 | 304.6 | Low | 13:25:37 - 13:33:08 | 4874 |
| Maupin | 13:29:22 | -19.7 | Dark | Down | 27.9 | 304.8 | Low | 13:25:37 - 13:33:08 | 4849 |
| Madras/Culver | 13:29:21 | -19.6 | Dark | Down | 27.6 | 305.0 | Low | 13:25:35 - 13:33:06 | 4807 |
| Redmond | 13:29:19 | -19.6 | Dark | Down | 27.5 | 305.2 | Low | 13:25:34 - 13:33:05 | 4778 |
| Sisters | 13:29:19 | -19.9 | Dark | Down | 27.7 | 305.0 | Low | 13:25:34 - 13:33:05 | 4758 |
| Bend | 13:29:19 | -19.6 | Dark | Down | 27.4 | 305.2 | Low | 13:25:33 - 13:33:04 | 4755 |
| Oregon Observatory | 13:29:19 | -19.7 | Dark | Down | 27.4 | 305.2 | Low | 13:25:33 - 13:33:04 | 4735 |
| North Lake | 13:29:16 | -19.2 | Dark | Down | 26.7 | 305.7 | Low | 13:25:31 - 13:33:02 | 4717 |
| La Pine/Gilchrist | 13:29:18 | -19.7 | Dark | Down | 27.3 | 305.2 | Low | 13:25:32 - 13:33:03 | 4717 |
| Paisley | 13:29:15 | -18.8 | Dark | Down | 26.2 | 306.1 | Low | 13:25:29 - 13:33:00 | 4697 |
| Lakeview | 13:29:13 | -18.5 | Dark | Down | 25.8 | 306.4 | Low | 13:25:28 - 13:32:59 | 4670 |
| Cedarville | 13:29:11 | -18.3 | Dark | Down | 25.3 | 306.7 | Low | 13:25:26 - 13:32:57 | 4631 |
| Chiloquin | 13:29:15 | -19.7 | Dark | Down | 26.9 | 305.5 | Low | 13:25:30 - 13:33:01 | 4614 |
| Klamath Falls | 13:29:14 | -19.6 | Dark | Down | 26.7 | 305.7 | Low | 13:25:29 - 13:33:00 | 4593 |
| Tulelake | 13:29:13 | -19.3 | Dark | Down | 26.3 | 306.0 | Low | 13:25:28 - 13:32:59 | 4590 |
| DCO | 13:28:54 | -11.2 | CT | Down | 17.0 | 311.6 | Really Low | 13:25:09 - 13:32:40 | 4585 |
| Patrick | 13:28:55 | -11.9 | CT | Down | 17.6 | 311.3 | Really Low | 13:25:09 - 13:32:40 | 4562 |
| Tonopah | 13:29:01 | -15.2 | AT | Down | 21.4 | 309.2 | Low | 13:25:16 - 13:32:47 | 4548 |
| Henderson | 13:28:57 | -12.9 | AT | Down | 18.7 | 310.7 | Really Low | 13:25:11 - 13:32:42 | 4537 |
| Kingman/Dolan Springs | 13:28:54 | -11.9 | CT | Down | 17.6 | 311.2 | Really Low | 13:25:09 - 13:32:40 | 4533 |
| Indian Springs | 13:28:58 | -13.6 | AT | Down | 19.5 | 310.2 | Really Low | 13:25:12 - 13:32:43 | 4533 |
| Fall River/Burney | 13:29:11 | -19.1 | Dark | Down | 25.7 | 306.3 | Low | 13:25:26 - 13:32:57 | 4526 |
| Susanville | 13:29:09 | -18.4 | Dark | Down | 24.9 | 306.9 | Low | 13:25:23 - 13:32:54 | 4520 |
| Reno | 13:29:06 | -17.5 | AT | Down | 23.9 | 307.6 | Low | 13:25:21 - 13:32:52 | 4504 |
| Yerington | 13:29:05 | -16.9 | AT | Down | 23.1 | 308.1 | Low | 13:25:19 - 13:32:50 | 4501 |
| Laughlin/Bullhead City | 13:28:54 | -12.3 | AT | Down | 17.9 | 311.0 | Really Low | 13:25:09 - 13:32:40 | 4499 |
| Searchlight/Boulder City | 13:28:55 | -12.7 | AT | Down | 18.3 | 310.8 | Really Low | 13:25:10 - 13:32:41 | 4499 |
| Hawthorne | 13:29:03 | -16.4 | AT | Down | 22.5 | 308.4 | Low | 13:25:18 - 13:32:49 | 4497 |
| Beatty | 13:28:59 | -14.5 | AT | Down | 20.4 | 309.7 | Low | 13:25:13 - 13:32:44 | 4490 |
| Gimple | 13:29:08 | -18.5 | Dark | Down | 24.9 | 306.9 | Low | 13:25:23 - 13:32:54 | 4487 |
| Portola | 13:29:07 | -18.1 | Dark | Down | 24.4 | 307.2 | Low | 13:25:22 - 13:32:53 | 4486 |
| Greenville | 13:29:08 | -18.5 | Dark | Down | 24.9 | 306.9 | Low | 13:25:23 - 13:32:54 | 4483 |
| Mohave Valley | 13:28:54 | -12.2 | AT | Down | 17.7 | 311.1 | Really Low | 13:25:08 - 13:32:39 | 4479 |
| Carson City | 13:29:05 | -17.4 | AT | Down | 23.7 | 307.7 | Low | 13:25:20 - 13:32:51 | 4478 |
| Quincy | 13:29:08 | -18.5 | Dark | Down | 24.8 | 307.0 | Low | 13:25:22 - 13:32:53 | 4468 |
| Lake Havasu City | 13:28:53 | -11.9 | CT | Down | 17.3 | 311.3 | Really Low | 13:25:08 - 13:32:39 | 4466 |
| Gardnerville | 13:29:04 | -17.3 | AT | Down | 23.5 | 307.8 | Low | 13:25:19 - 13:32:50 | 4462 |
| Parker | 13:28:52 | -11.8 | CT | Down | 17.1 | 311.4 | Really Low | 13:25:07 - 13:32:38 | 4442 |
| Lee Vining | 13:29:02 | -16.6 | AT | Down | 22.5 | 308.4 | Low | 13:25:16 - 13:32:47 | 4426 |
| Bishop | 13:29:00 | -15.9 | AT | Down | 21.7 | 308.9 | Low | 13:25:15 - 13:32:46 | 4425 |
| Lone Pine | 13:28:58 | -15.4 | AT | Down | 21.0 | 309.2 | Low | 13:25:13 - 13:32:44 | 4388 |
| Blythe | 13:28:51 | -11.9 | CT | Down | 16.9 | 311.4 | Really Low | 13:25:06 - 13:32:37 | 4384 |
| Yuma | 13:28:50 | -11.6 | CT | Down | 16.3 | 311.6 | Really Low | 13:25:04 - 13:32:35 | 4312 |
| Calipatria | 13:28:50 | -12.4 | AT | Down | 17.2 | 311.1 | Really Low | 13:25:05 - 13:32:36 | 4286 |
| Idyllwild | 13:28:52 | -13.6 | AT | Down | 18.3 | 310.5 | Really Low | 13:25:06 - 13:32:37 | 4256 |
| Wildwood | 13:28:53 | -15.2 | AT | Down | 19.7 | 309.8 | Really Low | 13:25:08 - 13:32:39 | 4163 |
| CPSLO | 13:28:57 | -17.1 | AT | Down | 21.8 | 308.6 | Low | 13:25:11 - 13:32:42 | 4129 |
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 54598, (2019/12/03 13:33UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:30 0.8 27.75 96 Mirphak 03:24:19.4 +49:51:40 1.8 9.41 91 PPM 046963 04:18:08.2 +42:08:28 6.1 2.80 98 PPM 046793 04:06:25.4 +43:25:02 7.9 0.32 96 PPM 046760 04:03:57.4 +43:22:35 9.0 0.15 96 54598 04:04:39.1 +43:27:23 15.3 96 Positions are for J2000
Event circumstances last updated at 2017/12/15 17:15:20 UT
Marc W. Buie, Southwest Research Institute