RECON: TNO occultation with 47932

Event between (47932) 00GN171 and star GA0580:14187523 with event index number of 2313890

Geocentric closest approach at 2023/04/25 04:28:15 UTC

J2000 position of star is 16:59:58.9 -31:15:48
Equinox of date position of star is 17:01:28.8 -31:17:48
Stellar brightness G=16.3, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 162 degrees from the moon. Moon is 25% illuminated.
Apparent brightness V=21.1

Object is 29.5 AU from the Sun and 28.7 AU from the Earth.
Apparent velocity is 15.9 km/sec on the sky relative to the star, or, 2.7 arcsec/hr.
The 1-sigma error in the time of the event is 268 seconds.
The 1-sigma cross-track error in the shadow position is 1724 km.

The object has an absolute magnitude Hv=6.3
Diameter=346.7 km assuming a 5% albedo -- 21.0 sec chord
Diameter=141.6 km assuming a 30% albedo -- 8.6 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 
 
 

Star training set for 47932, (2023/04/25 04:28UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:50.4 -26:28:54  0.9  8.25 155
26Eps Sco      16:51:40.7 -34:20:00  2.3  3.67 159
PPM 295807     17:03:23.3 -32:10:34  5.0  0.97 162
PPM 295758     17:01:21.4 -31:44:35  8.4  0.45 162
PPM 295748     17:00:46.5 -31:13:33  9.0  0.17 162
47932          17:01:28.9 -31:17:48 16.3       162
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 47932, (2023/04/25 04:28UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  8.25 155
26Eps Sco      16:50:08.8 -34:17:41  2.3  3.67 159
PPM 295807     17:01:52.6 -32:08:38  5.0  0.97 162
PPM 295758     16:59:51.1 -31:42:35  8.4  0.45 162
PPM 295748     16:59:16.6 -31:11:32  9.0  0.17 162
47932          16:59:58.9 -31:15:48 16.3       162
Positions are for J2000

Event circumstances last updated at 2023/04/19 02:32:51 UT

Marc W. Buie, Southwest Research Institute

RECON