RECON: TNO occultation with 578832

Event between (578832) 14GP53 and star GA0780:05318291 with event index number of 2550353

Geocentric closest approach at 2023/03/25 01:37:30 UTC

J2000 position of star is 16:32:42.4 -11:42:15
Equinox of date position of star is 16:33:55.0 -11:44:57
Stellar brightness G=16.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 156 degrees from the moon. Moon is 14% illuminated.
TNO apparent brightness V=22.6

TNO is 22.5 AU from the Sun and 22.0 AU from the Earth.
The TNO is moving 6.9 km/sec on the sky relative to the star, or, 1.5 arcsec/hr.
The 1-sigma error in the time of the event is 346 seconds.
The 1-sigma cross-track error in the shadow position is 1699 km.

The TNO has an absolute magnitude Hv=8.9
Diameter=98.2 km assuming a 5% albedo -- 14.3 sec chord
Diameter=40.1 km assuming a 30% albedo -- 5.8 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 578832, (2023/03/25 01:38UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:50.1 -26:28:54  0.9 14.75 157
13Zet Oph      16:38:26.4 -10:36:44  2.6  1.58 155
PPM 199862     16:40:03.6 -08:39:47  6.4  3.43 154
PPM 231764     16:31:10.8 -12:04:40  8.5  0.76 157
PPM 231820     16:33:49.9 -12:00:10  8.8  0.25 156
578832         16:33:59.8 -11:45:07 16.8       156
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 578832, (2023/03/25 01:38UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 14.75 157
13Zet Oph      16:37:09.6 -10:34:01  2.6  1.58 155
PPM 199862     16:38:47.7 -08:37:07  6.4  3.43 154
PPM 231764     16:29:53.3 -12:01:43  8.5  0.76 157
PPM 231820     16:32:32.3 -11:57:18  8.8  0.25 156
578832         16:32:42.4 -11:42:15 16.8       156
Positions are for J2000

Event circumstances last updated at 2021/10/16 01:20:26 UT

Marc W. Buie, Southwest Research Institute

RECON