Event between (181855) 98WT31 and star GA1300:02601414 with event index number of 1211348
Geocentric closest approach at 2022/08/13 07:04:43 UTC
J2000 position of star is 05:17:08.2 +41:43:18
Equinox of date position of star is 05:18:42.5 +41:44:39
Stellar brightness G=17.0,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 105 degrees from the moon.
Moon is 98% illuminated.
TNO apparent brightness V=23.6
TNO is 37.6 AU from the Sun
and 38.1 AU from the Earth.
The TNO is moving 22.3
km/sec on the sky relative to the star, or,
2.9 arcsec/hr.
The 1-sigma error in the time of the event is 300 seconds.
The 1-sigma cross-track error in the shadow position is
4403 km.
The TNO has an absolute magnitude Hv=7.7
Diameter=173.8 km assuming a 5% albedo -- 7.8 sec chord
Diameter=70.9 km assuming a 30% albedo -- 3.2 sec chord
Dynamical classification is SCATEXTD
Star training set for 181855, (2022/08/13 07:05UT) Object RA Dec mag sep mel Aldebaran 04:37:13.3 +16:33:11 0.8 26.72 92 34Bet Aur 06:01:11.3 +44:56:50 1.9 8.35 113 PPM 047999 05:21:50.1 +41:06:25 5.5 0.86 105 PPM 047958 05:20:00.4 +42:07:56 8.3 0.45 105 PPM 047945 05:19:21.7 +42:02:26 8.9 0.32 105 181855 05:18:44.3 +41:44:40 17.0 105 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, (2022/08/13 07:05UT) Object RA Dec mag sep mel Aldebaran 04:35:55.3 +16:30:29 0.8 26.72 92 34Bet Aur 05:59:31.6 +44:56:51 1.9 8.35 113 PPM 047999 05:20:14.6 +41:05:08 5.5 0.86 105 PPM 047958 05:18:23.9 +42:06:35 8.3 0.45 105 PPM 047945 05:17:45.4 +42:01:04 8.9 0.32 105 181855 05:17:08.2 +41:43:18 17.0 105 Positions are for J2000
Event circumstances last updated at 2022/03/16 00:56:28 UT
Marc W. Buie, Southwest Research Institute