RECON: TNO occultation with 09JE19

Event between 09JE19 and star GA0960:04090969 with event index number of 2363620

Geocentric closest approach at 2023/03/18 18:26:47 UTC

J2000 position of star is 14:56:03.6 +06:10:04
Equinox of date position of star is 14:57:11.2 +06:04:37
Stellar brightness G=15.5, 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 12% illuminated.
TNO apparent brightness V=21.4

TNO is 29.4 AU from the Sun and 28.7 AU from the Earth.
The TNO is moving 17.9 km/sec on the sky relative to the star, or, 3.1 arcsec/hr.
The 1-sigma error in the time of the event is 82 seconds.
The 1-sigma cross-track error in the shadow position is 1592 km.

The TNO has an absolute magnitude Hv=6.6
Diameter=289.7 km assuming a 5% albedo -- 16.2 sec chord
Diameter=118.3 km assuming a 30% albedo -- 6.6 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 09JE19, (2023/03/18 18:21UT)
Object            RA         Dec     mag  sep  mel
Arcturus       14:16:43.4 +19:03:48  0.0 16.30 112
Unukalhai      15:45:24.8 +06:21:15  2.6 11.98  88
PPM 161289     15:08:49.5 +05:24:36  6.2  2.96  96
PPM 161061     14:54:48.8 +06:08:53  6.6  0.60  99
PPM 161102     14:57:25.1 +06:04:00  9.6  0.05  99
09JE19         14:57:12.6 +06:04:30 15.5        99
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 09JE19, (2023/03/18 18:21UT)
Object            RA         Dec     mag  sep  mel
Arcturus       14:15:38.0 +19:10:14  0.0 16.30 112
Unukalhai      15:44:16.3 +06:25:33  2.6 11.98  88
PPM 161289     15:07:40.3 +05:29:53  6.2  2.96  96
PPM 161061     14:53:39.8 +06:14:30  6.6  0.60  99
PPM 161102     14:56:16.0 +06:09:34  9.6  0.05  99
09JE19         14:56:03.6 +06:10:04 15.5        99
Positions are for J2000

Event circumstances last updated at 2022/09/26 02:27:43 UT

Marc W. Buie, Southwest Research Institute

RECON