RECON: TNO occultation with 184314

Event between (184314) Mbabamwanawaresa and star GA0700:05426906 with event index number of 1106430

Geocentric closest approach at 2021/06/27 21:26:03 UTC

J2000 position of star is 14:23:23.4 -18:15:07
Equinox of date position of star is 14:24:34.7 -18:20:54
Stellar brightness G=15.3, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 99 degrees from the moon. Moon is 87% illuminated.
TNO apparent brightness V=22.6

TNO is 40.6 AU from the Sun and 40.0 AU from the Earth.
The TNO is moving 11.4 km/sec on the sky relative to the star, or, 1.4 arcsec/hr.
The 1-sigma error in the time of the event is 784 seconds.
The 1-sigma cross-track error in the shadow position is 5380 km.

The TNO has an absolute magnitude Hv=6.4
Diameter=316.2 km assuming a 5% albedo -- 27.8 sec chord
Diameter=129.1 km assuming a 30% albedo -- 11.4 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 
 
 

Star training set for 184314, (2021/06/27 21:26UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:19.7 -11:16:22  1.0 15.75 114
27Bet Lib      15:18:10.0 -09:27:39  2.6 15.74  90
PPM 228604     14:19:49.8 -18:48:52  5.9  1.22  99
PPM 228653     14:22:15.9 -19:05:23  7.7  0.92  99
PPM 228713     14:24:40.3 -18:18:12  9.7  0.05  98
184314         14:24:35.0 -18:20:55 15.3        98
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 184314, (2021/06/27 21:26UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 15.75 114
27Bet Lib      15:17:00.3 -09:22:59  2.6 15.74  90
PPM 228604     14:18:38.2 -18:42:59  5.9  1.22  99
PPM 228653     14:21:04.1 -18:59:32  7.7  0.92  99
PPM 228713     14:23:28.6 -18:12:24  9.7  0.05  98
184314         14:23:23.4 -18:15:07 15.3        98
Positions are for J2000

Event circumstances last updated at 2021/05/20 01:10:39 UT

Marc W. Buie, Southwest Research Institute

RECON