RECON: TNO occultation with 533561

Event between (533561) 14JN80 and star GA0780:09899813 with event index number of 2586779

Geocentric closest approach at 2028/05/24 22:50:47 UTC

J2000 position of star is 18:12:12.4 -10:03:38
Equinox of date position of star is 18:13:33.4 -10:03:10
Stellar brightness G=15.3, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 153 degrees from the moon. Moon is 1% illuminated.
Apparent brightness V=22.4

Object is 37.3 AU from the Sun and 36.5 AU from the Earth.
Apparent velocity is 20.7 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 778 seconds.
The 1-sigma cross-track error in the shadow position is 3622 km.

The object has an absolute magnitude Hv=6.6
Diameter=288.4 km assuming a 5% albedo -- 13.8 sec chord
Diameter=117.7 km assuming a 30% albedo -- 5.6 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 533561, (2028/05/24 22:51UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:09.2 -26:29:33  0.9 29.28 178
35Eta Oph      17:12:00.5 -15:45:29  2.6 16.09 168
PPM 201392     18:07:40.2 -08:19:10  6.1  2.30 153
PPM 201491     18:13:20.8 -09:32:18  8.4  0.52 153
PPM 234172     18:13:42.8 -10:01:37  9.6  0.03 153
533561         18:13:46.4 -10:03:06 15.3       153
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 533561, (2028/05/24 22:51UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 29.28 178
35Eta Oph      17:10:22.7 -15:43:29  2.6 16.09 168
PPM 201392     18:06:07.4 -08:19:27  6.1  2.30 153
PPM 201491     18:11:47.1 -09:32:49  8.4  0.52 153
PPM 234172     18:12:08.8 -10:02:10  9.6  0.03 153
533561         18:12:12.4 -10:03:38 15.3       153
Positions are for J2000

Event circumstances last updated at 2024/06/24 21:29:18 UT

Marc W. Buie, Southwest Research Institute

RECON