RECON: TNO occultation with 523673

Event between (523673) 13MZ11 and star GA0780:22089691 with event index number of 2625472

Geocentric closest approach at 2022/09/12 14:13:59 UTC

J2000 position of star is 23:05:56.7 -10:04:31
Equinox of date position of star is 23:07:05.1 -09:57:25
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 34 degrees from the moon. Moon is 94% illuminated.
TNO apparent brightness V=20.8

TNO is 18.7 AU from the Sun and 17.7 AU from the Earth.
The TNO is moving 22.0 km/sec on the sky relative to the star, or, 6.1 arcsec/hr.
The 1-sigma error in the time of the event is 34 seconds.
The 1-sigma cross-track error in the shadow position is 690 km.

The TNO has an absolute magnitude Hv=8.1
Diameter=145.9 km assuming a 5% albedo -- 6.6 sec chord
Diameter=59.6 km assuming a 30% albedo -- 2.7 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 523673, (2022/09/12 14:14UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:54.0 -29:30:05  1.2 19.64  47
PPM 241368     23:15:51.0 -10:33:54  6.3  2.23  33
PPM 241171     23:07:04.6 -10:18:54  7.7  0.36  35
PPM 241189     23:07:41.3 -09:56:21  9.7  0.14  34
523673         23:07:07.7 -09:57:09 13.3        34
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 523673, (2022/09/12 14:14UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.6 -29:37:24  1.2 19.64  47
PPM 241368     23:14:40.1 -10:41:20  6.3  2.23  33
PPM 241171     23:05:53.5 -10:26:17  7.7  0.36  35
PPM 241189     23:06:30.3 -10:03:44  9.7  0.14  34
523673         23:05:56.7 -10:04:31 13.3        34
Positions are for J2000

Event circumstances last updated at 2021/11/15 00:48:40 UT

Marc W. Buie, Southwest Research Institute

RECON