Event between (181855) 98WT31 and star GA1320:02950036 with event index number of 1388583
Geocentric closest approach at 2025/02/18 12:38:56 UTC
J2000 position of star is 05:23:20.9 +43:49:48
Equinox of date position of star is 05:25:07.0 +43:51:05
Stellar brightness G=14.4,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 131 degrees from the moon.
Moon is 70% illuminated.
Apparent brightness V=23.6
Object is 37.6 AU from the Sun
and 37.2 AU from the Earth.
Apparent velocity is 10.7
km/sec on the sky relative to the star, or,
1.4 arcsec/hr.
The 1-sigma error in the time of the event is 511 seconds.
The 1-sigma cross-track error in the shadow position is
5980 km.
The object has an absolute magnitude Hv=7.7
Diameter=173.8 km assuming a 5% albedo -- 16.3 sec chord
Diameter=70.9 km assuming a 30% albedo -- 6.7 sec chord
Dynamical classification is SCATEXTD
Star training set for 181855, (2025/02/18 12:39UT) Object RA Dec mag sep mel Aldebaran 04:37:21.9 +16:33:29 0.8 29.11 145 34Bet Aur 06:01:22.4 +44:56:50 1.9 6.56 125 20Rho Aur 05:23:35.3 +41:49:37 4.9 2.05 132 PPM 048019 05:22:45.0 +43:26:10 8.1 0.60 132 PPM 048075 05:25:54.3 +43:59:09 9.4 0.19 131 181855 05:25:10.0 +43:51:07 14.4 131 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 181855, (2025/02/18 12:39UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:29 0.8 29.11 145 34Bet Aur 05:59:31.6 +44:56:51 1.9 6.56 125 20Rho Aur 05:21:48.4 +41:48:15 4.9 2.05 132 PPM 048019 05:20:56.3 +43:24:46 8.1 0.60 132 PPM 048075 05:24:05.0 +43:57:52 9.4 0.19 131 181855 05:23:20.9 +43:49:48 14.4 131 Positions are for J2000
Event circumstances last updated at 2024/06/10 01:52:15 UT
Marc W. Buie, Southwest Research Institute