Event between (503858) 98HQ151 and star GA0800:20559825 with event index number of 2453119
Geocentric closest approach at 2028/03/22 20:45:04 UTC
J2000 position of star is 19:53:37.1 -09:41:47
Equinox of date position of star is 19:54:54.7 -09:38:00
Stellar brightness G=16.6,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 29 degrees from the moon.
Moon is 10% illuminated.
Apparent brightness V=24.4
Object is 34.9 AU from the Sun
and 35.3 AU from the Earth.
Apparent velocity is 19.5
km/sec on the sky relative to the star, or,
2.7 arcsec/hr.
The 1-sigma error in the time of the event is 427 seconds.
The 1-sigma cross-track error in the shadow position is
5333 km.
The object has an absolute magnitude Hv=8.8
Diameter=104.7 km assuming a 5% albedo -- 5.5 sec chord
Diameter=42.8 km assuming a 30% albedo -- 2.2 sec chord
Dynamical classification is 3:2E
Star training set for 503858, (2028/03/22 20:45UT) Object RA Dec mag sep mel Fomalhaut 22:59:12.1 -29:28:19 1.2 47.28 24 Tarazed 19:47:36.1 +10:41:02 2.7 20.39 38 56 Aql 19:55:40.1 -08:29:56 5.4 1.13 29 PPM 203380 19:53:51.3 -09:29:10 8.4 0.35 29 503858 19:55:09.6 -09:37:16 16.6 29 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 503858, (2028/03/22 20:45UT) Object RA Dec mag sep mel Fomalhaut 22:57:39.7 -29:37:24 1.2 47.28 24 Tarazed 19:46:15.6 +10:36:48 2.7 20.39 38 56 Aql 19:54:08.3 -08:34:28 5.4 1.13 29 PPM 203380 19:52:18.9 -09:33:38 8.4 0.35 29 503858 19:53:37.1 -09:41:47 16.6 29 Positions are for J2000
Event circumstances last updated at 2023/09/04 00:47:35 UT
Marc W. Buie, Southwest Research Institute