Event between (342842) 08YB3 and star GA1220:10251129 with event index number of 2204092
Geocentric closest approach at 2025/06/29 12:23:05 UTC
J2000 position of star is 20:03:48.4 +32:44:54
Equinox of date position of star is 20:04:44.9 +32:49:04
Stellar brightness G=16.7,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 125 degrees from the moon.
Moon is 20% illuminated.
Apparent brightness V=21.7
Object is 15.8 AU from the Sun
and 15.2 AU from the Earth.
Apparent velocity is 27.5
km/sec on the sky relative to the star, or,
8.9 arcsec/hr.
The 1-sigma error in the time of the event is 21 seconds.
The 1-sigma cross-track error in the shadow position is
1637 km.
The object has an absolute magnitude Hv=9.5
Diameter=82.8 km assuming a 5% albedo -- 2.8 sec chord
Diameter=33.8 km assuming a 30% albedo -- 1.1 sec chord
Dynamical classification is CENTAURR
Star training set for 342842, (2025/06/29 12:23UT) Object RA Dec mag sep mel Deneb 20:42:18.1 +45:22:21 1.3 14.48 118 37Gam Cyg 20:23:08.6 +40:20:22 2.2 8.37 121 PPM 084050 20:02:56.2 +31:11:23 6.5 1.68 126 PPM 084083 20:03:52.1 +32:39:01 8.3 0.26 125 PPM 084142 20:05:27.9 +32:53:43 8.9 0.16 125 342842 20:04:48.0 +32:49:18 16.7 125 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 342842, (2025/06/29 12:23UT) Object RA Dec mag sep mel Deneb 20:41:25.9 +45:16:49 1.3 14.48 118 37Gam Cyg 20:22:13.7 +40:15:24 2.2 8.37 121 PPM 084050 20:01:55.5 +31:07:03 6.5 1.68 126 PPM 084083 20:02:52.4 +32:34:39 8.3 0.26 125 PPM 084142 20:04:28.3 +32:49:18 8.9 0.16 125 342842 20:03:48.4 +32:44:54 16.7 125 Positions are for J2000
Event circumstances last updated at 2024/03/02 06:27:07 UT
Marc W. Buie, Southwest Research Institute