RECON: TNO occultation with 02GR32

Event between 02GR32 and star GA0680:08046826 with event index number of 2763935

Geocentric closest approach at 2022/09/16 10:54:42 UTC

J2000 position of star is 16:52:27.6 -20:01:16
Equinox of date position of star is 16:53:46.2 -20:03:24
Stellar brightness G=16.3, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 172 degrees from the moon. Moon is 64% illuminated.
TNO apparent brightness V=24.1

TNO is 32.9 AU from the Sun and 33.0 AU from the Earth.
The TNO is moving 10.7 km/sec on the sky relative to the star, or, 1.6 arcsec/hr.
The 1-sigma error in the time of the event is 5087 seconds.
The 1-sigma cross-track error in the shadow position is 4935 km.

The TNO has an absolute magnitude Hv=8.7
Diameter=111.7 km assuming a 5% albedo -- 10.4 sec chord
Diameter=45.6 km assuming a 30% albedo -- 4.3 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 02GR32, (2022/09/16 10:55UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:48.2 -26:28:50  0.9  8.31 177
35Eta Oph      17:11:40.9 -15:45:05  2.6  6.05 166
PPM 266088     16:54:45.9 -20:27:06  5.7  0.45 172
PPM 232254     16:53:40.5 -19:23:37  8.5  0.66 172
PPM 266080     16:54:16.9 -20:13:09  8.9  0.20 172
02GR32         16:53:48.0 -20:03:27 16.3       172
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 02GR32, (2022/09/16 10:55UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  8.31 177
35Eta Oph      17:10:22.7 -15:43:29  2.6  6.05 166
PPM 266088     16:53:25.2 -20:24:57  5.7  0.45 172
PPM 232254     16:52:20.5 -19:21:26  8.5  0.66 172
PPM 266080     16:52:56.4 -20:10:59  8.9  0.20 172
02GR32         16:52:27.6 -20:01:16 16.3       172
Positions are for J2000

Event circumstances last updated at 2022/03/13 02:16:16 UT

Marc W. Buie, Southwest Research Institute

RECON