Event between (577578) 13GW136 and star GA0700:06683723 with event index number of 2549348
Geocentric closest approach at 2027/02/07 08:17:45 UTC
J2000 position of star is 16:40:42.4 -18:49:44
Equinox of date position of star is 16:41:59.7 -18:52:13
Stellar brightness G=12.1,
use SENSEUP=16 with the MallinCam and and exposure
time of 250 milli-seconds with the QHY174 camera.
Star is 75 degrees from the moon.
Moon is 0% illuminated.
TNO apparent brightness V=22.8
TNO is 31.3 AU from the Sun
and 31.7 AU from the Earth.
The TNO is moving 18.5
km/sec on the sky relative to the star, or,
2.9 arcsec/hr.
The 1-sigma error in the time of the event is 696 seconds.
The 1-sigma cross-track error in the shadow position is
1868 km.
The TNO has an absolute magnitude Hv=7.6
Diameter=182.8 km assuming a 5% albedo -- 9.9 sec chord
Diameter=74.6 km assuming a 30% albedo -- 4.0 sec chord
Dynamical classification is 2:1E
Star training set for 577578, (2027/02/07 08:18UT) Object RA Dec mag sep mel Antares 16:31:04.4 -26:29:23 0.9 8.04 76 35Eta Oph 17:11:56.1 -15:45:24 2.6 7.73 68 PPM 232030 16:43:08.6 -17:47:32 5.0 1.11 75 PPM 231956 16:40:09.7 -18:52:40 7.1 0.50 75 PPM 232041 16:43:32.5 -18:59:13 9.4 0.32 74 577578 16:42:17.4 -18:52:46 12.1 74 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 577578, (2027/02/07 08:18UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 8.04 76 35Eta Oph 17:10:22.7 -15:43:29 2.6 7.73 68 PPM 232030 16:41:34.4 -17:44:32 5.0 1.11 75 PPM 231956 16:38:34.7 -18:49:33 7.1 0.50 75 PPM 232041 16:41:57.5 -18:56:13 9.4 0.32 74 577578 16:40:42.4 -18:49:44 12.1 75 Positions are for J2000
Event circumstances last updated at 2022/01/21 23:58:56 UT
Marc W. Buie, Southwest Research Institute