Event between (550310) 12DD86 and star GA0780:05770448 with event index number of 2400219
Geocentric closest approach at 2028/03/04 13:45:15 UTC
J2000 position of star is 17:02:22.6 -10:28:20
Equinox of date position of star is 17:03:43.8 -10:30:21
Stellar brightness G=16.0,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 164 degrees from the moon.
Moon is 52% illuminated.
Apparent brightness V=22.7
Object is 19.5 AU from the Sun
and 19.5 AU from the Earth.
Apparent velocity is 10.3
km/sec on the sky relative to the star, or,
2.6 arcsec/hr.
The 1-sigma error in the time of the event is 178 seconds.
The 1-sigma cross-track error in the shadow position is
1127 km.
The object has an absolute magnitude Hv=9.5
Diameter=75.2 km assuming a 5% albedo -- 7.5 sec chord
Diameter=30.7 km assuming a 30% albedo -- 3.0 sec chord
Dynamical classification is CENTAURR
Star training set for 550310, (2028/03/04 13:43UT) Object RA Dec mag sep mel Antares 16:31:08.4 -26:29:31 0.9 17.76 173 35Eta Oph 17:11:59.8 -15:45:28 2.6 5.60 169 PPM 232375 16:58:59.7 -11:00:21 6.3 1.31 165 PPM 232500 17:03:56.3 -10:59:26 7.6 0.48 165 PPM 232511 17:04:18.1 -10:34:21 9.3 0.11 164 550310 17:03:56.0 -10:30:39 16.0 164 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 550310, (2028/03/04 13:43UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 17.76 173 35Eta Oph 17:10:22.8 -15:43:29 2.6 5.60 169 PPM 232375 16:57:26.0 -10:57:50 6.3 1.31 165 PPM 232500 17:02:22.6 -10:57:07 7.6 0.48 165 PPM 232511 17:02:44.7 -10:32:03 9.3 0.11 164 550310 17:02:22.6 -10:28:20 16.0 164 Positions are for J2000
Event circumstances last updated at 2024/06/23 21:29:25 UT
Marc W. Buie, Southwest Research Institute