RECON: TNO occultation with 02GS32

Event between 02GS32 and star GA0660:11192720 with event index number of 1267313

Geocentric closest approach at 2023/07/10 11:37:24 UTC

J2000 position of star is 17:17:20.1 -23:02:45
Equinox of date position of star is 17:18:41.0 -23:04:07
Stellar brightness G=16.1, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 123 degrees from the moon. Moon is 46% illuminated.
TNO apparent brightness V=23.4

TNO is 38.6 AU from the Sun and 37.7 AU from the Earth.
The TNO is moving 21.0 km/sec on the sky relative to the star, or, 2.8 arcsec/hr.
The 1-sigma error in the time of the event is 2326 seconds.
The 1-sigma cross-track error in the shadow position is 5125 km.

The TNO has an absolute magnitude Hv=7.5
Diameter=187.9 km assuming a 5% albedo -- 8.9 sec chord
Diameter=76.7 km assuming a 30% albedo -- 3.7 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 02GS32, (2023/07/10 11:37UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:51.2 -26:28:56  0.9 11.39 133
35Eta Oph      17:11:43.7 -15:45:09  2.6  7.50 125
PPM 266746     17:23:08.3 -24:55:40  6.5  2.11 122
PPM 266655     17:19:33.5 -24:05:49  7.0  1.04 123
PPM 266662     17:19:52.8 -22:59:04  9.4  0.27 123
02GS32         17:18:45.6 -23:04:11 16.1       123
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 02GS32, (2023/07/10 11:37UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 11.39 133
35Eta Oph      17:10:22.7 -15:43:29  2.6  7.50 125
PPM 266746     17:21:41.5 -24:54:23  6.5  2.11 122
PPM 266655     17:18:07.3 -24:04:25  7.0  1.04 123
PPM 266662     17:18:27.3 -22:57:40  9.4  0.27 123
02GS32         17:17:20.1 -23:02:45 16.1       123
Positions are for J2000

Event circumstances last updated at 2022/04/03 00:00:18 UT

Marc W. Buie, Southwest Research Institute

RECON