Event between (54598) Bienor and star GA1340:02263719 with event index number of 1025320
Geocentric closest approach at 2020/12/29 02:01:51 UTC
J2000 position of star is 04:37:54.3 +44:14:41
Equinox of date position of star is 04:39:24.4 +44:17:07
Stellar brightness G=13.3,
use SENSEUP=32 with the MallinCam and and exposure
time of 500 milli-seconds with the QHY174 camera.
Star is 24 degrees from the moon.
Moon is 99% illuminated.
TNO apparent brightness V=19.2
[RECON map]
TNO is 14.2 AU from the Sun
and 13.4 AU from the Earth.
The TNO is moving 20.1
km/sec on the sky relative to the star, or,
7.5 arcsec/hr.
The 1-sigma error in the time of the event is 24 seconds.
The 1-sigma cross-track error in the shadow position is
484 km.
The sky-plane scale is
9683.9 km/arcsec.
The TNO has an absolute magnitude Hv=7.6
Diameter=186.2 km assuming a 5% albedo -- 9.3 sec chord
Diameter=76.0 km assuming a 30% albedo -- 3.8 sec chord
Dynamical classification is CENTAURR
Star training set for 54598, (2020/12/29 02:02UT) Object RA Dec mag sep mel Aldebaran 04:37:07.7 +16:32:59 0.8 27.74 17 3Iot Aur 04:58:21.9 +33:11:51 2.7 11.68 13 59 Per 04:44:24.0 +43:24:11 5.2 1.26 23 PPM 047235 04:39:18.8 +44:44:15 8.0 0.45 24 PPM 047225 04:38:48.8 +44:10:59 9.5 0.15 24 54598 04:39:24.5 +44:17:07 13.3 24 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 17.5 km
RECON observability=0.9 and success probability=4.4%
| Site | Site mid-time (UT) |
Sun alt (deg) |
Sky | Moon | Star alt (deg) |
Star az (deg) |
Target | Observing Time (UT) |
X-track (km) |
| Victoria | 02:04:06 | -15.3 | AT | Up | 47.0 | 70.7 | Up | 02:01:35 - 02:06:36 | 2740 |
| Peachland | 02:03:58 | -18.0 | AT | Up | 49.7 | 73.9 | Up | 02:01:27 - 02:06:28 | 2598 |
| Clarence Fulton | 02:03:55 | -18.4 | Dark | Up | 50.1 | 74.7 | Up | 02:01:24 - 02:06:25 | 2598 |
| Kelowna | 02:03:57 | -18.2 | Dark | Up | 49.9 | 74.2 | Up | 02:01:26 - 02:06:27 | 2588 |
| Summerland | 02:03:58 | -18.0 | AT | Up | 49.7 | 73.8 | Up | 02:01:28 - 02:06:29 | 2586 |
| Penticton | 02:03:58 | -18.0 | Dark | Up | 49.7 | 73.8 | Up | 02:01:28 - 02:06:29 | 2577 |
| Oliver | 02:04:00 | -17.9 | AT | Up | 49.6 | 73.4 | Up | 02:01:29 - 02:06:30 | 2560 |
| Anarchist Mountain Observatory | 02:04:01 | -18.0 | Dark | Up | 49.7 | 73.3 | Up | 02:01:30 - 02:06:31 | 2541 |
| Tonasket | 02:04:03 | -17.9 | AT | Up | 49.6 | 72.9 | Up | 02:01:32 - 02:06:33 | 2530 |
| Manson/Chelan | 02:04:07 | -17.2 | AT | Up | 48.9 | 71.6 | Up | 02:01:36 - 02:06:37 | 2530 |
| Okanogan | 02:04:04 | -17.7 | AT | Up | 49.4 | 72.5 | Up | 02:01:34 - 02:06:35 | 2522 |
| Brewster | 02:04:06 | -17.5 | AT | Up | 49.2 | 72.1 | Up | 02:01:35 - 02:06:36 | 2519 |
| Wenatchee | 02:04:10 | -17.0 | AT | Up | 48.6 | 71.1 | Up | 02:01:39 - 02:06:40 | 2516 |
| Ellensburg | 02:04:11 | -16.7 | AT | Up | 48.4 | 70.5 | Up | 02:01:40 - 02:06:41 | 2508 |
| Yakima | 02:04:13 | -16.6 | AT | Up | 48.2 | 70.1 | Up | 02:01:43 - 02:06:44 | 2489 |
| The Dalles | 02:04:18 | -15.9 | AT | Up | 47.5 | 68.8 | Up | 02:01:48 - 02:06:49 | 2475 |
| Toppenish/White Swan | 02:04:14 | -16.7 | AT | Up | 48.3 | 69.9 | Up | 02:01:44 - 02:06:45 | 2468 |
| Goldendale | 02:04:17 | -16.2 | AT | Up | 47.8 | 69.2 | Up | 02:01:47 - 02:06:48 | 2465 |
| Maupin | 02:04:20 | -15.9 | AT | Up | 47.4 | 68.4 | Up | 02:01:50 - 02:06:51 | 2448 |
| Sisters | 02:04:25 | -15.3 | AT | Up | 46.7 | 67.3 | Up | 02:01:54 - 02:06:55 | 2432 |
| Redmond | 02:04:25 | -15.6 | AT | Up | 47.0 | 67.5 | Up | 02:01:54 - 02:06:55 | 2407 |
| Bend | 02:04:26 | -15.4 | AT | Up | 46.8 | 67.2 | Up | 02:01:55 - 02:06:56 | 2404 |
| Oregon Observatory | 02:04:27 | -15.3 | AT | Up | 46.7 | 67.0 | Up | 02:01:56 - 02:06:57 | 2403 |
| La Pine/Gilchrist | 02:04:28 | -15.2 | AT | Up | 46.6 | 66.8 | Up | 02:01:57 - 02:06:58 | 2396 |
| Pasco | 02:04:14 | -17.5 | AT | Up | 49.0 | 70.4 | Up | 02:01:43 - 02:06:44 | 2389 |
| PNWRO | 02:04:14 | -17.6 | AT | Up | 49.1 | 70.2 | Up | 02:01:44 - 02:06:45 | 2363 |
| North Lake | 02:04:29 | -15.5 | AT | Up | 46.8 | 66.6 | Up | 02:01:59 - 02:07:00 | 2337 |
| Klamath Falls | 02:04:35 | -14.6 | AT | Up | 45.8 | 65.3 | Up | 02:02:05 - 02:07:06 | 2337 |
| Paisley | 02:04:31 | -15.6 | AT | Up | 46.8 | 66.2 | Up | 02:02:01 - 02:07:02 | 2286 |
| Fall River/Burney | 02:04:40 | -14.5 | AT | Up | 45.6 | 64.3 | Up | 02:02:09 - 02:07:10 | 2250 |
| Lakeview | 02:04:34 | -15.5 | AT | Up | 46.8 | 65.7 | Up | 02:02:03 - 02:07:04 | 2247 |
| Cedarville | 02:04:37 | -15.5 | AT | Up | 46.6 | 65.2 | Up | 02:02:06 - 02:07:07 | 2200 |
| Greenville | 02:04:44 | -14.5 | AT | Up | 45.5 | 63.6 | Up | 02:02:13 - 02:07:14 | 2172 |
| Susanville | 02:04:42 | -14.8 | AT | Up | 45.8 | 64.0 | Up | 02:02:11 - 02:07:12 | 2169 |
| Gimple | 02:04:44 | -14.6 | AT | Up | 45.6 | 63.7 | Up | 02:02:13 - 02:07:14 | 2166 |
| Quincy | 02:04:44 | -14.5 | AT | Up | 45.4 | 63.5 | Up | 02:02:14 - 02:07:15 | 2160 |
| Portola | 02:04:45 | -14.8 | AT | Up | 45.7 | 63.5 | Up | 02:02:14 - 02:07:15 | 2123 |
| Reno | 02:04:45 | -15.2 | AT | Up | 46.0 | 63.4 | Up | 02:02:14 - 02:07:15 | 2066 |
| Carson City | 02:04:47 | -15.1 | AT | Up | 45.9 | 63.1 | Up | 02:02:16 - 02:07:17 | 2044 |
| Gardnerville | 02:04:48 | -15.0 | AT | Up | 45.8 | 62.9 | Up | 02:02:17 - 02:07:18 | 2027 |
| Yerington | 02:04:47 | -15.5 | AT | Up | 46.2 | 63.1 | Up | 02:02:16 - 02:07:17 | 1992 |
| Hawthorne | 02:04:48 | -15.7 | AT | Up | 46.4 | 62.8 | Up | 02:02:18 - 02:07:19 | 1930 |
| Lee Vining | 02:04:51 | -15.2 | AT | Up | 45.8 | 62.2 | Up | 02:02:21 - 02:07:22 | 1929 |
| CPSLO | 02:05:04 | -13.2 | AT | Up | 43.5 | 59.5 | Up | 02:02:34 - 02:07:35 | 1873 |
| Bishop | 02:04:53 | -15.6 | AT | Up | 46.0 | 61.8 | Up | 02:02:22 - 02:07:23 | 1846 |
| Tonopah | 02:04:49 | -16.7 | AT | Up | 47.2 | 62.7 | Up | 02:02:18 - 02:07:19 | 1810 |
| Beatty | 02:04:53 | -16.7 | AT | Up | 47.0 | 61.7 | Up | 02:02:22 - 02:07:23 | 1709 |
| Wildwood | 02:05:07 | -14.5 | AT | Up | 44.3 | 58.9 | Up | 02:02:36 - 02:07:37 | 1659 |
| Indian Springs | 02:04:53 | -17.4 | AT | Up | 47.6 | 61.6 | Up | 02:02:22 - 02:07:23 | 1616 |
| Henderson | 02:04:54 | -17.8 | AT | Up | 47.8 | 61.2 | Up | 02:02:23 - 02:07:24 | 1536 |
| Idyllwild | 02:05:06 | -15.8 | AT | Up | 45.5 | 58.8 | Up | 02:02:36 - 02:07:37 | 1506 |
| Laughlin/Bullhead City | 02:04:57 | -17.9 | AT | Up | 47.7 | 60.4 | Up | 02:02:27 - 02:07:28 | 1452 |
| Mohave Valley | 02:04:58 | -17.8 | AT | Up | 47.5 | 60.1 | Up | 02:02:27 - 02:07:28 | 1434 |
| Patrick | 02:04:55 | -18.5 | Dark | Up | 48.3 | 60.7 | Up | 02:02:24 - 02:07:25 | 1420 |
| Kingman/Dolan Springs | 02:04:57 | -18.3 | Dark | Up | 48.1 | 60.5 | Up | 02:02:26 - 02:07:27 | 1419 |
| Lake Havasu City | 02:05:00 | -17.9 | AT | Up | 47.5 | 59.8 | Up | 02:02:29 - 02:07:30 | 1391 |
| Calipatria | 02:05:07 | -16.6 | AT | Up | 46.0 | 58.4 | Up | 02:02:36 - 02:07:37 | 1384 |
| Parker | 02:05:01 | -17.9 | AT | Up | 47.4 | 59.5 | Up | 02:02:30 - 02:07:31 | 1366 |
| Blythe | 02:05:03 | -17.5 | AT | Up | 46.9 | 59.0 | Up | 02:02:33 - 02:07:34 | 1352 |
| Yuma | 02:05:07 | -17.2 | AT | Up | 46.4 | 58.1 | Up | 02:02:37 - 02:07:38 | 1293 |
| Dunrhomin | 02:04:20 | -26.2 | Dark | Up | 56.5 | 67.8 | Up | 02:01:50 - 02:06:51 | 1186 |
| George/Scottsdale | 02:04:59 | -19.7 | Dark | Up | 48.9 | 59.3 | Up | 02:02:28 - 02:07:29 | 1170 |
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, (2020/12/29 02:02UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:29 0.8 27.74 17 3Iot Aur 04:56:59.6 +33:09:58 2.7 11.68 13 59 Per 04:42:54.4 +43:21:53 5.2 1.26 23 PPM 047235 04:37:48.2 +44:41:48 8.0 0.45 24 PPM 047225 04:37:18.7 +44:08:32 9.5 0.15 24 54598 04:37:54.3 +44:14:41 13.3 24 Positions are for J2000
Event circumstances last updated at 2020/12/23 00:19:24 UT
Marc W. Buie, Southwest Research Institute