Event between 12HW87 and star GA0740:10494387 with event index number of 2156296
Geocentric closest approach at 2022/07/26 18:37:23 UTC
J2000 position of star is 17:41:36.6 -14:10:32
Equinox of date position of star is 17:42:52.3 -14:11:06
Stellar brightness G=15.8,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 159 degrees from the moon.
Moon is 4% illuminated.
TNO apparent brightness V=23.0
TNO is 34.0 AU from the Sun
and 33.2 AU from the Earth.
The TNO is moving 17.2
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 384 seconds.
The 1-sigma cross-track error in the shadow position is
2038 km.
The TNO has an absolute magnitude Hv=7.6
Diameter=184.5 km assuming a 5% albedo -- 10.7 sec chord
Diameter=75.3 km assuming a 30% albedo -- 4.4 sec chord
Dynamical classification is SCATNEAR
Star training set for 12HW87, (2022/07/26 18:37UT) Object RA Dec mag sep mel Antares 16:30:47.7 -26:28:48 0.9 20.86 148 35Eta Oph 17:11:40.4 -15:45:05 2.6 7.70 153 56Omi Ser 17:42:41.0 -12:53:07 4.4 1.30 158 PPM 233476 17:43:22.1 -13:56:59 8.3 0.26 159 PPM 233472 17:43:13.6 -14:09:15 9.4 0.09 159 12HW87 17:42:53.6 -14:11:07 15.8 159 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, (2022/07/26 18:37UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 20.86 148 35Eta Oph 17:10:22.7 -15:43:29 2.6 7.70 153 56Omi Ser 17:41:24.8 -12:52:32 4.4 1.30 158 PPM 233476 17:42:05.2 -13:56:25 8.3 0.26 159 PPM 233472 17:41:56.6 -14:08:41 9.4 0.09 159 12HW87 17:41:36.6 -14:10:32 15.8 159 Positions are for J2000
Event circumstances last updated at 2022/03/14 01:06:15 UT
Marc W. Buie, Southwest Research Institute