RECON: TNO occultation with 523645

Event between (523645) 10VK201 and star GA0820:00429067 with event index number of 2626004

Geocentric closest approach at 2028/08/24 01:29:52 UTC

J2000 position of star is 04:45:59.9 -06:40:16
Equinox of date position of star is 04:47:10.1 -06:37:44
Stellar brightness G=13.3, use SENSEUP=32 with the MallinCam and and exposure time of 500 milli-seconds with the QHY174 camera.
Star is 124 degrees from the moon. Moon is 19% illuminated.
Apparent brightness V=21.8

Object is 48.1 AU from the Sun and 48.2 AU from the Earth.
Apparent velocity is 16.0 km/sec on the sky relative to the star, or, 1.6 arcsec/hr.
The 1-sigma error in the time of the event is 158 seconds.
The 1-sigma cross-track error in the shadow position is 4443 km.

The object has an absolute magnitude Hv=4.8
Diameter=633.9 km assuming a 5% albedo -- 41.5 sec chord
Diameter=258.8 km assuming a 30% albedo -- 17.0 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 
 
 

Star training set for 523645, (2028/08/24 01:27UT)
Object            RA         Dec     mag  sep  mel
Rigel          05:15:55.0 -08:10:15  0.1  7.24 117
67Bet Eri      05:09:15.6 -05:03:05  2.8  5.66 119
PPM 187358     04:50:01.4 -05:37:38  5.7  1.19 124
PPM 187311     04:47:23.3 -06:56:19  7.9  0.32 124
PPM 187320     04:47:52.4 -06:43:11  9.5  0.15 124
523645         04:47:23.8 -06:37:15 13.3       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 523645, (2028/08/24 01:27UT)
Object            RA         Dec     mag  sep  mel
Rigel          05:14:32.3 -08:12:06  0.1  7.24 117
67Bet Eri      05:07:50.8 -05:05:13  2.8  5.66 119
PPM 187358     04:48:36.9 -05:40:32  5.7  1.19 124
PPM 187311     04:45:59.7 -06:59:20  7.9  0.32 124
PPM 187320     04:46:28.6 -06:46:11  9.5  0.15 124
523645         04:45:59.9 -06:40:16 13.3       124
Positions are for J2000

Event circumstances last updated at 2023/12/24 04:42:41 UT

Marc W. Buie, Southwest Research Institute

RECON