Event between (471272) 11FY9 and star GA0840:04705673 with event index number of 2572453
Geocentric closest approach at 2023/05/07 12:55:24 UTC
J2000 position of star is 15:41:46.8 -04:08:53
Equinox of date position of star is 15:42:55.5 -04:13:00
Stellar brightness G=17.0,
use SENSEUP=128 with the MallinCam and and exposure
time of 2 seconds with the QHY174 camera.
Star is 24 degrees from the moon.
Moon is 96% illuminated.
TNO apparent brightness V=22.8
TNO is 24.4 AU from the Sun
and 23.4 AU from the Earth.
The TNO is moving 24.5
km/sec on the sky relative to the star, or,
5.2 arcsec/hr.
The 1-sigma error in the time of the event is 59 seconds.
The 1-sigma cross-track error in the shadow position is
1184 km.
The TNO has an absolute magnitude Hv=8.9
Diameter=97.7 km assuming a 5% albedo -- 4.0 sec chord
Diameter=39.9 km assuming a 30% albedo -- 1.6 sec chord
Dynamical classification is CENTAURR
Star training set for 471272, (2023/05/07 12:55UT) Object RA Dec mag sep mel Antares 16:30:50.6 -26:28:54 0.9 25.03 1 27Bet Lib 15:18:16.0 -09:28:03 2.6 8.07 23 PPM 198970 15:50:10.3 -03:53:19 6.0 1.82 23 PPM 198794 15:38:58.9 -03:40:51 8.3 1.14 25 PPM 198862 15:42:29.1 -04:04:06 9.6 0.20 24 471272 15:43:00.4 -04:13:18 17.0 24 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 471272, (2023/05/07 12:55UT) Object RA Dec mag sep mel Antares 16:29:24.4 -26:25:56 0.9 25.03 1 27Bet Lib 15:17:00.3 -09:22:59 2.6 8.07 23 PPM 198970 15:48:56.7 -03:49:07 6.0 1.82 23 PPM 198794 15:37:45.5 -03:36:20 8.3 1.14 25 PPM 198862 15:41:15.4 -03:59:41 9.6 0.20 24 471272 15:41:46.8 -04:08:53 17.0 24 Positions are for J2000
Event circumstances last updated at 2021/10/17 01:13:06 UT
Marc W. Buie, Southwest Research Institute