Event between (54598) Bienor and star GA1260:03106161 with event index number of 1387651
Geocentric closest approach at 2025/04/20 18:02:47 UTC
J2000 position of star is 07:17:39.5 +37:45:08
Equinox of date position of star is 07:19:18.5 +37:42:23
Stellar brightness G=14.5,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 164 degrees from the moon.
Moon is 53% illuminated.
Apparent brightness V=19.1
Object is 13.4 AU from the Sun
and 13.6 AU from the Earth.
Apparent velocity is 18.4
km/sec on the sky relative to the star, or,
6.7 arcsec/hr.
The 1-sigma error in the time of the event is 31 seconds.
The 1-sigma cross-track error in the shadow position is
539 km.
The object has an absolute magnitude Hv=7.4
Diameter=195.0 km assuming a 5% albedo -- 10.6 sec chord
Diameter=79.6 km assuming a 30% albedo -- 4.3 sec chord
Dynamical classification is CENTAURR
Star training set for 54598, (2025/04/20 18:03UT) Object RA Dec mag sep mel Pollux 07:46:51.8 +27:57:47 1.1 11.32 176 65 Aur 07:23:43.8 +36:42:38 5.1 1.32 166 PPM 072702 07:23:13.1 +37:36:46 7.7 0.77 165 PPM 072671 07:20:44.5 +38:01:30 10.0 0.42 164 PPM 072634 07:18:59.8 +37:40:40 10.1 0.08 164 54598 07:19:21.9 +37:42:18 14.5 165 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, (2025/04/20 18:03UT) Object RA Dec mag sep mel Pollux 07:45:17.9 +28:01:33 1.1 11.32 176 65 Aur 07:22:02.4 +36:45:38 5.1 1.32 166 PPM 072702 07:21:30.9 +37:39:44 7.7 0.77 165 PPM 072671 07:19:01.8 +38:04:23 10.0 0.42 164 PPM 072634 07:17:17.3 +37:43:30 10.1 0.08 164 54598 07:17:39.5 +37:45:08 14.5 164 Positions are for J2000
Event circumstances last updated at 2024/06/13 03:45:17 UT
Marc W. Buie, Southwest Research Institute