RECON: TNO occultation with 523675

Event between (523675) 13PV74 and star GA0780:22042154 with event index number of 2625370

Geocentric closest approach at 2021/10/02 00:10:26 UTC

J2000 position of star is 22:39:58.2 -10:48:19
Equinox of date position of star is 22:41:06.8 -10:41:30
Stellar brightness G=13.7, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 155 degrees from the moon. Moon is 23% illuminated.
TNO apparent brightness V=21.9

TNO is 41.5 AU from the Sun and 40.7 AU from the Earth.
The TNO is moving 20.2 km/sec on the sky relative to the star, or, 2.5 arcsec/hr.
The 1-sigma error in the time of the event is 95 seconds.
The 1-sigma cross-track error in the shadow position is 1667 km.

The TNO has an absolute magnitude Hv=5.7
Diameter=436.5 km assuming a 5% albedo -- 21.6 sec chord
Diameter=178.2 km assuming a 30% albedo -- 8.8 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 523675, (2021/10/02 00:11UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:50.9 -29:30:23  1.2 19.26 153
70 Aqr         22:49:38.8 -10:26:24  6.2  2.11 153
PPM 240584     22:41:29.6 -11:29:29  8.2  0.81 155
PPM 240557     22:40:11.9 -10:52:54  9.6  0.29 155
523675         22:41:06.9 -10:41:29 13.7       154
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 523675, (2021/10/02 00:11UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.6 -29:37:24  1.2 19.26 153
70 Aqr         22:48:30.3 -10:33:20  6.2  2.11 153
PPM 240584     22:40:20.7 -11:36:19  8.2  0.81 155
PPM 240557     22:39:03.1 -10:59:43  9.6  0.29 155
523675         22:39:58.2 -10:48:19 13.7       155
Positions are for J2000

Event circumstances last updated at 2021/09/12 01:25:33 UT

Marc W. Buie, Southwest Research Institute

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