Event between 12HW87 and star GA0740:15795510 with event index number of 2156960
Geocentric closest approach at 2024/05/07 03:03:24 UTC
J2000 position of star is 18:06:58.5 -15:03:17
Equinox of date position of star is 18:08:20.4 -15:03:01
Stellar brightness G=16.0,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 121 degrees from the moon.
Moon is 1% illuminated.
Apparent brightness V=23.1
Object is 34.5 AU from the Sun
and 33.8 AU from the Earth.
Apparent velocity is 14.6
km/sec on the sky relative to the star, or,
2.1 arcsec/hr.
The 1-sigma error in the time of the event is 772 seconds.
The 1-sigma cross-track error in the shadow position is
3530 km.
The object has an absolute magnitude Hv=7.6
Diameter=184.5 km assuming a 5% albedo -- 12.7 sec chord
Diameter=75.3 km assuming a 30% albedo -- 5.2 sec chord
Dynamical classification is SCATNEAR
Star training set for 12HW87, (2024/05/07 03:03UT) Object RA Dec mag sep mel Antares 16:30:54.3 -26:29:02 0.9 25.42 143 35Eta Oph 17:11:46.6 -15:45:12 2.6 13.66 135 PPM 234113 18:11:06.3 -13:55:42 6.4 1.30 120 PPM 234043 18:07:57.9 -14:58:08 8.2 0.13 121 PPM 234057 18:08:34.3 -15:02:54 9.5 0.05 121 12HW87 18:08:22.2 -15:03:01 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 12HW87, (2024/05/07 03:03UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 25.42 143 35Eta Oph 17:10:22.7 -15:43:29 2.6 13.66 135 PPM 234113 18:09:43.4 -13:56:04 6.4 1.30 120 PPM 234043 18:06:34.4 -14:58:23 8.2 0.13 121 PPM 234057 18:07:10.7 -15:03:11 9.5 0.05 121 12HW87 18:06:58.5 -15:03:17 16.0 121 Positions are for J2000
Event circumstances last updated at 2023/11/07 05:20:57 UT
Marc W. Buie, Southwest Research Institute