Event between (342842) 08YB3 and star GA1200:08372994 with event index number of 2204366
Geocentric closest approach at 2025/09/16 00:16:21 UTC
J2000 position of star is 19:43:17.5 +30:02:54
Equinox of date position of star is 19:44:15.0 +30:06:26
Stellar brightness G=16.0,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 122 degrees from the moon.
Moon is 33% illuminated.
Apparent brightness V=21.7
Object is 15.9 AU from the Sun
and 15.4 AU from the Earth.
Apparent velocity is 31.2
km/sec on the sky relative to the star, or,
10.1 arcsec/hr.
The 1-sigma error in the time of the event is 49 seconds.
The 1-sigma cross-track error in the shadow position is
1019 km.
The object has an absolute magnitude Hv=9.5
Diameter=82.8 km assuming a 5% albedo -- 2.5 sec chord
Diameter=33.8 km assuming a 30% albedo -- 1.0 sec chord
Dynamical classification is CENTAURR
Star training set for 342842, (2025/09/16 00:16UT) Object RA Dec mag sep mel Vega 18:37:48.5 +38:48:31 0.0 16.19 113 37Gam Cyg 20:23:09.1 +40:20:25 2.2 12.93 110 12Phi Cyg 19:40:23.5 +30:12:50 5.8 0.85 122 PPM 083423 19:44:16.1 +30:17:42 7.3 0.18 121 PPM 083445 19:44:58.0 +30:06:43 8.8 0.14 122 342842 19:44:18.7 +30:06:39 16.0 121 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, (2025/09/16 00:16UT) Object RA Dec mag sep mel Vega 18:36:56.7 +38:47:07 0.0 16.19 113 37Gam Cyg 20:22:13.7 +40:15:24 2.2 12.93 110 12Phi Cyg 19:39:22.6 +30:09:13 5.8 0.85 122 PPM 083423 19:43:15.1 +30:13:57 7.3 0.18 121 PPM 083445 19:43:56.8 +30:02:56 8.8 0.14 122 342842 19:43:17.5 +30:02:54 16.0 122 Positions are for J2000
Event circumstances last updated at 2024/03/03 05:54:58 UT
Marc W. Buie, Southwest Research Institute