Event between (54598) Bienor and star GA1320:02080858 with event index number of 1104716
Geocentric closest approach at 2021/04/04 00:30:20 UTC
J2000 position of star is 04:39:12.7 +42:07:59
Equinox of date position of star is 04:40:41.9 +42:10:25
Stellar brightness G=15.4,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 150 degrees from the moon.
Moon is 55% illuminated.
TNO apparent brightness V=19.5
TNO is 14.1 AU from the Sun
and 14.6 AU from the Earth.
The TNO is moving 24.5
km/sec on the sky relative to the star, or,
8.3 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
536 km.
The TNO has an absolute magnitude Hv=7.6
Diameter=186.2 km assuming a 5% albedo -- 7.6 sec chord
Diameter=76.0 km assuming a 30% albedo -- 3.1 sec chord
Dynamical classification is CENTAURR
Star training set for 54598, (2021/04/04 00:30UT) Object RA Dec mag sep mel Aldebaran 04:37:08.6 +16:33:01 0.8 25.63 149 3Iot Aur 04:58:22.9 +33:11:52 2.7 9.63 156 58 Per 04:38:10.1 +41:18:22 5.5 0.99 150 PPM 047246 04:40:22.9 +42:16:49 7.7 0.12 150 54598 04:40:42.2 +42:10:25 15.4 150 Positions are for equinox of date
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, (2021/04/04 00:30UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:29 0.8 25.63 149 3Iot Aur 04:56:59.6 +33:09:58 2.7 9.63 156 58 Per 04:36:41.4 +41:15:52 5.5 0.99 150 PPM 047246 04:38:53.3 +42:14:23 7.7 0.12 150 54598 04:39:12.7 +42:07:59 15.4 150 Positions are for J2000
Event circumstances last updated at 2021/03/13 00:30:28 UT
Marc W. Buie, Southwest Research Institute