RECON: TNO occultation with 02GR32

Event between 02GR32 and star GA0680:09402446 with event index number of 2764077

Geocentric closest approach at 2023/05/18 00:32:12 UTC

J2000 position of star is 17:08:12.8 -20:15:54
Equinox of date position of star is 17:09:35.6 -20:17:37
Stellar brightness G=16.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 139 degrees from the moon. Moon is 3% illuminated.
Apparent brightness V=23.9

Object is 33.1 AU from the Sun and 32.1 AU from the Earth.
Apparent velocity is 21.9 km/sec on the sky relative to the star, or, 3.4 arcsec/hr.
The 1-sigma error in the time of the event is 820 seconds.
The 1-sigma cross-track error in the shadow position is 1627 km.

The object has an absolute magnitude Hv=8.7
Diameter=111.7 km assuming a 5% albedo -- 5.1 sec chord
Diameter=45.6 km assuming a 30% albedo -- 2.1 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 02GR32, (2023/05/18 00:32UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:50.7 -26:28:55  0.9 10.83 147
35Eta Oph      17:11:43.2 -15:45:08  2.6  4.57 138
PPM 266364     17:06:08.6 -20:31:32  6.5  0.84 140
PPM 266456     17:09:55.7 -20:14:46  8.2  0.09 139
02GR32         17:09:35.9 -20:17:38 16.9       138
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, (2023/05/18 00:32UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 10.83 147
35Eta Oph      17:10:22.7 -15:43:29  2.6  4.57 138
PPM 266364     17:04:45.3 -20:29:41  6.5  0.84 140
PPM 266456     17:08:32.5 -20:13:03  8.2  0.09 139
02GR32         17:08:12.8 -20:15:54 16.9       139
Positions are for J2000

Event circumstances last updated at 2023/04/18 02:25:09 UT

Marc W. Buie, Southwest Research Institute

RECON