Event between (54598) Bienor and star GA1340:03233700 with event index number of 1104953
Geocentric closest approach at 2021/10/11 23:42:18 UTC
J2000 position of star is 05:39:09.7 +44:07:36
Equinox of date position of star is 05:40:43.7 +44:08:13
Stellar brightness G=15.6,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 160 degrees from the moon.
Moon is 37% illuminated.
TNO apparent brightness V=19.2
TNO is 14.0 AU from the Sun
and 13.6 AU from the Earth.
The TNO is moving 9.4
km/sec on the sky relative to the star, or,
3.4 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
608 km.
The TNO has an absolute magnitude Hv=7.5
Diameter=187.1 km assuming a 5% albedo -- 19.9 sec chord
Diameter=76.4 km assuming a 30% albedo -- 8.1 sec chord
Dynamical classification is CENTAURR
Star training set for 54598, (2021/10/11 23:42UT) Object RA Dec mag sep mel Pollux 07:46:38.8 +27:58:19 1.1 29.86 160 34Bet Aur 06:01:07.6 +44:56:50 1.9 3.72 161 PPM 048445 05:48:48.3 +42:31:57 6.3 2.17 162 PPM 048290 05:38:51.9 +44:04:57 8.0 0.34 160 PPM 048341 05:41:56.2 +44:21:34 9.4 0.31 160 PPM 048333 05:41:03.6 +44:02:01 10.5 0.12 161 54598 05:40:44.8 +44:08:14 15.6 161 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, (2021/10/11 23:42UT) Object RA Dec mag sep mel Pollux 07:45:18.0 +28:01:33 1.1 29.86 160 34Bet Aur 05:59:31.6 +44:56:51 1.9 3.72 161 PPM 048445 05:47:14.7 +42:31:34 6.3 2.17 162 PPM 048290 05:37:16.9 +44:04:15 8.0 0.34 160 PPM 048341 05:40:20.8 +44:20:58 9.4 0.31 160 PPM 048333 05:39:28.7 +44:01:23 10.5 0.12 161 54598 05:39:09.7 +44:07:36 15.6 160 Positions are for J2000
Event circumstances last updated at 2021/07/12 00:46:21 UT
Marc W. Buie, Southwest Research Institute