Event between (181874) 99HW11 and star GA0800:05028226 with event index number of 1667550
Geocentric closest approach at 2027/02/17 02:30:46 UTC
J2000 position of star is 16:07:50.7 -09:01:26
Equinox of date position of star is 16:09:07.4 -09:05:06
Stellar brightness G=15.8,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 144 degrees from the moon.
Moon is 80% illuminated.
Apparent brightness V=23.7
Object is 47.0 AU from the Sun
and 47.0 AU from the Earth.
Apparent velocity is 9.7
km/sec on the sky relative to the star, or,
1.0 arcsec/hr.
The 1-sigma error in the time of the event is 1752 seconds.
The 1-sigma cross-track error in the shadow position is
5391 km.
The object has an absolute magnitude Hv=6.8
Diameter=239.9 km assuming a 5% albedo -- 26.6 sec chord
Diameter=97.9 km assuming a 30% albedo -- 10.8 sec chord
Dynamical classification is SCATNEAR
Star training set for 181874, (2027/02/17 02:31UT) Object RA Dec mag sep mel Antares 16:31:04.5 -26:29:23 0.9 18.14 155 1Del Oph 16:15:46.2 -03:45:43 2.7 5.57 142 16 Sco 16:13:35.7 -08:36:56 5.7 1.16 144 PPM 199285 16:07:29.6 -08:50:34 8.1 0.52 143 PPM 199300 16:08:13.5 -09:10:50 9.8 0.28 143 181874 16:09:19.3 -09:05:40 15.8 144 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 181874, (2027/02/17 02:31UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 18.14 155 1Del Oph 16:14:20.7 -03:41:43 2.7 5.57 142 16 Sco 16:12:07.4 -08:32:51 5.7 1.16 144 PPM 199285 16:06:01.2 -08:46:16 8.1 0.52 143 PPM 199300 16:06:44.9 -09:06:34 9.8 0.28 143 181874 16:07:50.7 -09:01:26 15.8 144 Positions are for J2000
Event circumstances last updated at 2023/07/06 02:47:08 UT
Marc W. Buie, Southwest Research Institute