Event between (553893) 12BW154 and star GA1020:03488390 with event index number of 2226305
Geocentric closest approach at 2023/02/25 01:01:49 UTC
J2000 position of star is 11:27:27.7 +12:05:55
Equinox of date position of star is 11:28:39.8 +11:58:16
Stellar brightness G=11.9,
use SENSEUP=16 with the MallinCam and and exposure
time of 250 milli-seconds with the QHY174 camera.
Star is 128 degrees from the moon.
Moon is 27% illuminated.
Apparent brightness V=21.7
Object is 40.8 AU from the Sun
and 39.9 AU from the Earth.
Apparent velocity is 24.5
km/sec on the sky relative to the star, or,
3.1 arcsec/hr.
The 1-sigma error in the time of the event is 83 seconds.
The 1-sigma cross-track error in the shadow position is
1646 km.
The object has an absolute magnitude Hv=5.6
Diameter=457.1 km assuming a 5% albedo -- 18.7 sec chord
Diameter=186.6 km assuming a 30% albedo -- 7.6 sec chord
Dynamical classification is CLASSICAL
Star training set for 553893, (2023/02/25 01:02UT) Object RA Dec mag sep mel Regulus 10:09:36.2 +11:51:11 1.3 19.34 111 Denebola 11:50:14.4 +14:26:33 2.1 5.80 131 PPM 128238 11:26:10.9 +11:18:10 5.8 0.90 128 PPM 128274 11:29:14.1 +11:50:43 8.0 0.19 128 553893 11:28:39.8 +11:58:16 11.9 128 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 553893, (2023/02/25 01:02UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 19.34 111 Denebola 11:49:02.9 +14:34:17 2.1 5.80 131 PPM 128238 11:24:58.8 +11:25:49 5.8 0.90 128 PPM 128274 11:28:02.0 +11:58:23 8.0 0.19 128 553893 11:27:27.7 +12:05:55 11.9 128 Positions are for J2000
Event circumstances last updated at 2023/02/17 04:09:50 UT
Marc W. Buie, Southwest Research Institute